fix(#76): preserve pacing and empty-state truth

Aggregate conflicting freshness by severity so Local cannot mask Stale/Partial,
treat authoritative inactive SSE as valid state, honor Weekend focus headers,
and prove Limited Retry busy accessibility with deferred supplements.

Co-authored-by: Cursor <cursoragent@cursor.com>

.agents/harnesses.sh

@@ -25,7 +25,8 @@ EOF
 
 harness_claude() {                      # Claude Code — print mode, auto-accept edits
   local dir="$1" prompt="$2"
-  ( cd "$dir" && claude -p "$(cat "$prompt")" --permission-mode acceptEdits )
+  local model="${BOXBOX_CLAUDE_MODEL:-opus}"
+  ( cd "$dir" && claude -p "$(cat "$prompt")" --model "$model" --effort high --permission-mode acceptEdits )
 }
 
 harness_codex() {                       # OpenAI Codex CLI — non-interactive exec, full auto
@@ -40,7 +41,8 @@ harness_opencode() {                    # opencode — non-interactive run
 
 harness_cursor() {                      # Cursor CLI agent — composer-2.5, headless full-auto
   local dir="$1" prompt="$2"
-  ( cd "$dir" && cursor-agent -p "$(cat "$prompt")" --model composer-2.5 --force --trust )
+  local model="${BOXBOX_CURSOR_MODEL:-composer-2.5}"
+  ( cd "$dir" && cursor-agent -p "$(cat "$prompt")" --model "$model" --force --trust )
 }
 
 harness_agy() {                         # Antigravity CLI — disabled until headless is verified

docs/product/v0.4.0/README.md

@@ -0,0 +1,32 @@
+# v0.4.0 — Current Weekend & Product Truth
+
+Product research references for the v0.4.0 feature sprint.
+
+## Direction
+
+The sprint replaces route-first navigation with a state-aware Weekend experience:
+
+- Weekend is the adaptive home for what happened, what is live, and what is next.
+- Preview content folds into Weekend before a session.
+- Live remains a stable deep link and becomes Weekend's active-session state.
+- Race Hub remains explicit completed-session analysis rather than a primary landing destination.
+- Championship and Briefing remain dedicated destinations.
+- Explore owns secondary discovery; Admin moves to operator utility.
+
+## Mockups
+
+- `mockups/weekend-between-races.png` — desktop between-races/post-weekend state.
+- `mockups/weekend-live.png` — desktop active-session state; the circuit is static sector context, not live GPS.
+- `mockups/weekend-between-sessions-mobile.png` — 390×844 between-session state.
+
+These are directional references, not pixel-perfect specifications. Implementations must preserve the established box-box visual language, accessibility, data constraints, and responsive behavior while satisfying their issue acceptance criteria.
+
+## Constraints
+
+- No OpenF1 REST dependency during active sessions.
+- Public live GPS is not assumed to be available.
+- Championship round numbers exclude tests and cancelled meetings.
+- Connection health, live-session state, archive availability, and local-analysis readiness are separate concepts.
+- Future sessions must not render empty post-session analysis.
+
+The authoritative product decisions and research packet are recorded in GitHub issue #71 under epic #70.

frontend/src/api.ts

@@ -1,3 +1,4 @@
+import { apiFetch } from './lib/fetch'
 import type {
   ArticleContent,
   CarDataSample,
@@ -18,158 +19,184 @@ import type {
   WeekendContext,
 } from './types'
 
-export async function fetchRaceHub(sessionKey: number): Promise<RaceHub> {
+export async function fetchRaceHub(sessionKey: number, signal?: AbortSignal): Promise<RaceHub> {
-  const res = await fetch(`/api/v1/race-hub?session_key=${sessionKey}`)
+  return apiFetch<RaceHub>(`/api/v1/race-hub?session_key=${sessionKey}`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `race-hub:${sessionKey}`,
-  }
+  })
-  return res.json()
 }
 
-export async function fetchSeasons(): Promise<number[]> {
+export async function fetchSeasons(signal?: AbortSignal): Promise<number[]> {
-  const res = await fetch('/api/v1/seasons')
+  const years = await apiFetch<number[]>('/api/v1/seasons', {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: 'seasons',
-  }
+  })
-  const years = await res.json()
   return Array.isArray(years) ? years : []
 }
 
-export async function fetchLocalMeetings(year: number): Promise<Meeting[]> {
+export async function fetchLocalMeetings(year: number, signal?: AbortSignal): Promise<Meeting[]> {
-  const res = await fetch(`/api/v1/meetings?year=${year}&source=local`)
+  const meetings = await apiFetch<Meeting[]>(`/api/v1/meetings?year=${year}&source=local`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `meetings:local:${year}`,
-  }
+  })
-  const meetings = await res.json()
   return Array.isArray(meetings) ? meetings : []
 }
 
-export async function fetchSeasonMeetings(year: number): Promise<Meeting[]> {
+export async function fetchSeasonMeetings(year: number, signal?: AbortSignal): Promise<Meeting[]> {
-  return fetchMeetings(year, 'openf1')
+  return fetchMeetings(year, 'openf1', signal)
 }
 
-export async function fetchMeetings(year: number, source = 'auto'): Promise<Meeting[]> {
+export async function fetchMeetings(
-  const res = await fetch(`/api/v1/meetings?year=${year}&source=${source}`)
+  year: number,
-  if (!res.ok) {
+  source = 'auto',
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+  signal?: AbortSignal,
-  }
+): Promise<Meeting[]> {
-  const meetings = await res.json()
+  const meetings = await apiFetch<Meeting[]>(`/api/v1/meetings?year=${year}&source=${source}`, {
+    signal,
+    dedupeKey: `meetings:${source}:${year}`,
+  })
   return Array.isArray(meetings) ? meetings : []
 }
 
-export async function fetchResults(sessionKey: number, source = 'auto'): Promise<EnrichedResult[]> {
+export async function fetchResults(
-  const res = await fetch(`/api/v1/results?session_key=${sessionKey}&source=${source}`)
+  sessionKey: number,
-  if (!res.ok) {
+  source = 'auto',
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+  signal?: AbortSignal,
-  }
+): Promise<EnrichedResult[]> {
-  const results = await res.json()
+  const results = await apiFetch<EnrichedResult[]>(
+    `/api/v1/results?session_key=${sessionKey}&source=${source}`,
+    { signal, dedupeKey: `results:${source}:${sessionKey}` },
+  )
   return Array.isArray(results) ? results : []
 }
 
-export async function fetchStartingGrid(sessionKey: number, source = 'auto'): Promise<EnrichedGrid[]> {
+export async function fetchStartingGrid(
-  const res = await fetch(`/api/v1/grid?session_key=${sessionKey}&source=${source}`)
+  sessionKey: number,
-  if (!res.ok) {
+  source = 'auto',
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+  signal?: AbortSignal,
-  }
+): Promise<EnrichedGrid[]> {
-  const grid = await res.json()
+  const grid = await apiFetch<EnrichedGrid[]>(
+    `/api/v1/grid?session_key=${sessionKey}&source=${source}`,
+    { signal, dedupeKey: `grid:${source}:${sessionKey}` },
+  )
   return Array.isArray(grid) ? grid : []
 }
 
-export async function fetchTrackOutline(circuitKey: number, year: number): Promise<TrackOutline | null> {
+export async function fetchTrackOutline(
-  const res = await fetch(`/api/v1/track-outline?circuit_key=${circuitKey}&year=${year}`)
+  circuitKey: number,
-  if (!res.ok) return null
+  year: number,
-  const data = await res.json()
+  signal?: AbortSignal,
+): Promise<TrackOutline | null> {
+  try {
+    const data = await apiFetch<TrackOutline & { error?: string }>(
+      `/api/v1/track-outline?circuit_key=${circuitKey}&year=${year}`,
+      { signal, dedupeKey: `track-outline:${circuitKey}:${year}` },
+    )
     if (data?.error || !Array.isArray(data?.points) || data.points.length < 2) return null
     return data as TrackOutline
+  } catch {
+    return null
+  }
 }
 
 export async function fetchReplayFrames(
   sessionKey: number,
   intervalMs = 5000,
+  signal?: AbortSignal,
 ): Promise<ReplayFramesResponse> {
   const params = new URLSearchParams({
     session_key: String(sessionKey),
     interval_ms: String(intervalMs),
   })
-  const res = await fetch(`/api/v1/replay/frames?${params}`)
+  return apiFetch<ReplayFramesResponse>(`/api/v1/replay/frames?${params}`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `replay-frames:${sessionKey}:${intervalMs}`,
-  }
+  })
-  return res.json()
 }
 
-export async function fetchSessions(meetingKey: number, source = 'openf1'): Promise<Session[]> {
+export async function fetchSessions(
-  const res = await fetch(`/api/v1/sessions?meeting_key=${meetingKey}&source=${source}`)
+  meetingKey: number,
-  if (!res.ok) {
+  source = 'openf1',
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+  signal?: AbortSignal,
-  }
+): Promise<Session[]> {
-  const sessions = await res.json()
+  const sessions = await apiFetch<Session[]>(
+    `/api/v1/sessions?meeting_key=${meetingKey}&source=${source}`,
+    { signal, dedupeKey: `sessions:${source}:${meetingKey}` },
+  )
   return Array.isArray(sessions) ? sessions : []
 }
 
-export async function fetchWeekend(meetingKey: number): Promise<Weekend> {
+export async function fetchWeekend(meetingKey: number, signal?: AbortSignal): Promise<Weekend> {
-  const res = await fetch(`/api/v1/weekend?meeting_key=${meetingKey}`)
+  return apiFetch<Weekend>(`/api/v1/weekend?meeting_key=${meetingKey}`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `weekend:${meetingKey}`,
-  }
+  })
-  return res.json()
 }
 
-export async function fetchWeekendContext(): Promise<WeekendContext> {
+// fetchWeekendContext consumes the canonical /api/v1/weekend-context endpoint
-  const res = await fetch('/api/v1/weekend-context')
+// (backend story #72). The response is the authoritative WeekendContext shape and
-  if (!res.ok) {
+// is used verbatim as the Weekend home's source of truth. Any HTTP error throws
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+// so the hook can surface an explicit error state; there is no client-side
-  }
+// re-derivation of the contract. Race Hub bare-default landing also reads this
-  return res.json()
+// for `default_analysis_session` (#75).
+export async function fetchWeekendContext(signal?: AbortSignal): Promise<WeekendContext> {
+  return apiFetch<WeekendContext>('/api/v1/weekend-context', {
+    signal,
+    dedupeKey: 'weekend-context',
+  })
 }
 
-export async function fetchChampionshipHub(year?: number): Promise<ChampionshipHub> {
+export async function fetchChampionshipHub(
+  year?: number,
+  signal?: AbortSignal,
+): Promise<ChampionshipHub> {
   const params = new URLSearchParams({ source: 'auto' })
   if (year) params.set('year', year.toString())
-  const url = `/api/v1/championship/hub?${params.toString()}`
+  return apiFetch<ChampionshipHub>(`/api/v1/championship/hub?${params.toString()}`, {
-  const res = await fetch(url)
+    signal,
-  if (!res.ok) {
+    dedupeKey: `championship-hub:${year ?? 'latest'}`,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+  })
-  }
-  return res.json()
 }
 
 export async function fetchDriverSummary(
   driverNumber: number,
   year?: number,
+  signal?: AbortSignal,
 ): Promise<DriverSummary> {
-  const params = new URLSearchParams({ driver_number: String(driverNumber) })
+  const params = new URLSearchParams({ driver_number: String(driverNumber), source: 'auto' })
   if (year) params.set('year', String(year))
-  const res = await fetch(`/api/v1/driver/summary?${params.toString()}`)
+  return apiFetch<DriverSummary>(`/api/v1/driver/summary?${params.toString()}`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `driver-summary:${driverNumber}:${year ?? 'latest'}`,
-  }
+  })
-  return res.json()
 }
 
-export async function fetchLiveState(): Promise<LiveStateResponse> {
+export async function fetchLiveState(signal?: AbortSignal): Promise<LiveStateResponse> {
-  const res = await fetch('/api/v1/live/state')
+  return apiFetch<LiveStateResponse>('/api/v1/live/state', {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: 'live-state',
-  }
+  })
-  return res.json()
 }
 
 export async function fetchLiveTrackOutline(
   session: LiveSessionMeta,
   year = new Date().getFullYear(),
+  signal?: AbortSignal,
 ): Promise<TrackOutline> {
   const params = new URLSearchParams({ year: year.toString() })
   if (session.MeetingName) params.set('meeting_name', session.MeetingName)
   if (session.CircuitName) params.set('circuit_name', session.CircuitName)
-  const res = await fetch(`/api/v1/track-outline?${params.toString()}`)
+  return apiFetch<TrackOutline>(`/api/v1/track-outline?${params.toString()}`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `live-track-outline:${year}:${session.MeetingName ?? ''}:${session.CircuitName ?? ''}`,
-  }
+  })
-  return res.json()
 }
 
-export async function fetchNews(limit?: number, source?: string): Promise<NewsItem[]> {
+export async function fetchNews(
+  limit?: number,
+  source?: string,
+  signal?: AbortSignal,
+): Promise<NewsItem[]> {
   const params = new URLSearchParams()
   if (limit) params.set('limit', limit.toString())
   if (source) params.set('source', source)
@@ -177,19 +204,20 @@ export async function fetchNews(limit?: number, source?: string): Promise<NewsIt
   const query = params.toString()
   const url = query ? `/api/v1/news?${query}` : '/api/v1/news'
 
-  const res = await fetch(url)
+  return apiFetch<NewsItem[]>(url, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `news:${limit ?? 'all'}:${source ?? 'all'}`,
-  }
+  })
-  return res.json()
 }
 
-export async function fetchNewsArticle(articleUrl: string): Promise<ArticleContent> {
+export async function fetchNewsArticle(
-  const res = await fetch(`/api/v1/news/article?url=${encodeURIComponent(articleUrl)}`)
+  articleUrl: string,
-  if (!res.ok) {
+  signal?: AbortSignal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+): Promise<ArticleContent> {
-  }
+  return apiFetch<ArticleContent>(
-  return res.json()
+    `/api/v1/news/article?url=${encodeURIComponent(articleUrl)}`,
+    { signal },
+  )
 }
 
 export async function markNewsRead(articleUrl: string): Promise<void> {
@@ -203,28 +231,26 @@ export async function markNewsRead(articleUrl: string): Promise<void> {
 export async function fetchTelemetry(
   sessionKey: number,
   driverNumber: number,
+  signal?: AbortSignal,
 ): Promise<CarDataSample[]> {
-  const res = await fetch(
+  const data = await apiFetch<CarDataSample[]>(
     `/api/v1/telemetry?session_key=${sessionKey}&driver_number=${driverNumber}`,
+    { signal, dedupeKey: `telemetry:${sessionKey}:${driverNumber}` },
   )
-  if (!res.ok) {
-    throw new Error(`API ${res.status}: ${res.statusText}`)
-  }
-  const data = await res.json()
   return Array.isArray(data) ? data : []
 }
 
 export async function fetchLapsComparison(
   sessionKey: number,
   drivers?: number[],
+  signal?: AbortSignal,
 ): Promise<LapsComparisonResponse> {
   const params = new URLSearchParams({ session_key: String(sessionKey) })
   if (drivers?.length) {
     params.set('drivers', drivers.join(','))
   }
-  const res = await fetch(`/api/v1/laps/comparison?${params}`)
+  return apiFetch<LapsComparisonResponse>(`/api/v1/laps/comparison?${params}`, {
-  if (!res.ok) {
+    signal,
-    throw new Error(`API ${res.status}: ${res.statusText}`)
+    dedupeKey: `laps-comparison:${sessionKey}:${drivers?.join(',') ?? 'all'}`,
-  }
+  })
-  return res.json()
 }

frontend/src/components/LocalDataNavigator.tsx

@@ -5,6 +5,7 @@ import { fetchLocalMeetings, fetchSeasons, fetchWeekend } from '../api'
 import { formatCoverageHint } from '../lib/coverage'
 import { SourceBadge } from './SourceBadge'
 import { SessionCoverageDots } from './SessionCoverageDots'
+import { RouteState } from './RouteState'
 import type { Meeting, WeekendSession } from '../types'
 
 function formatMeetingDates(meeting: Meeting): string {
@@ -29,18 +30,18 @@ export function LocalDataNavigator({ onSelectSession }: Props) {
 
   const seasonsQuery = useQuery({
     queryKey: ['seasons'],
-    queryFn: fetchSeasons,
+    queryFn: ({ signal }) => fetchSeasons(signal),
   })
 
   const meetingsQuery = useQuery({
     queryKey: ['meetings', selectedYear],
-    queryFn: () => fetchLocalMeetings(selectedYear!),
+    queryFn: ({ signal }) => fetchLocalMeetings(selectedYear!, signal),
     enabled: selectedYear != null,
   })
 
   const weekendQuery = useQuery({
     queryKey: ['weekend', selectedMeetingKey],
-    queryFn: () => fetchWeekend(selectedMeetingKey!),
+    queryFn: ({ signal }) => fetchWeekend(selectedMeetingKey!, signal),
     enabled: selectedMeetingKey != null,
   })
 
@@ -68,14 +69,22 @@ export function LocalDataNavigator({ onSelectSession }: Props) {
   }
 
   if (seasonsQuery.isLoading) {
-    return <div className="nav-panel loading-state">loading local seasons…</div>
+    return <RouteState kind="loading" title="loading local seasons…" className="nav-panel" />
   }
 
   if (seasonsQuery.isError) {
     return (
-      <div className="nav-panel error-box">
+      <RouteState
-        {seasonsQuery.error instanceof Error ? seasonsQuery.error.message : 'Failed to load seasons'}
+        kind="error"
-      </div>
+        className="nav-panel"
+        title="Local seasons unavailable"
+        error={seasonsQuery.error}
+        onRetry={() => {
+          if (!seasonsQuery.isFetching) void seasonsQuery.refetch()
+        }}
+        retrying={seasonsQuery.isFetching}
+        testId="weekend-error"
+      />
     )
   }
 
@@ -124,9 +133,16 @@ export function LocalDataNavigator({ onSelectSession }: Props) {
       )}
 
       {meetingsQuery.isError && (
-        <div className="error-box" style={{ marginTop: 'var(--s4)' }}>
+        <RouteState
-          {meetingsQuery.error instanceof Error ? meetingsQuery.error.message : 'Failed to load meetings'}
+          kind="error"
-        </div>
+          title="Meetings unavailable"
+          error={meetingsQuery.error}
+          onRetry={() => {
+            if (!meetingsQuery.isFetching) void meetingsQuery.refetch()
+          }}
+          retrying={meetingsQuery.isFetching}
+          testId="weekend-meetings-error"
+        />
       )}
 
       {!meetingsQuery.isLoading && !meetingsQuery.isError && meetings.length === 0 && (
@@ -194,9 +210,16 @@ export function LocalDataNavigator({ onSelectSession }: Props) {
       )}
 
       {selectedMeetingKey != null && weekendQuery.isError && (
-        <div className="error-box" style={{ marginTop: 'var(--s4)' }}>
+        <RouteState
-          {weekendQuery.error instanceof Error ? weekendQuery.error.message : 'Failed to load weekend'}
+          kind="error"
-        </div>
+          title="Weekend unavailable"
+          error={weekendQuery.error}
+          onRetry={() => {
+            if (!weekendQuery.isFetching) void weekendQuery.refetch()
+          }}
+          retrying={weekendQuery.isFetching}
+          testId="weekend-error"
+        />
       )}
 
       {weekend && (

frontend/src/components/Nav.tsx

@@ -1,55 +1,66 @@
 import { Link } from '@tanstack/react-router'
-import { useQuery } from '@tanstack/react-query'
+import { Compass, FileText, Home, Trophy } from 'lucide-react'
-import { fetchLiveState } from '../api'
-import { isLiveSessionActive } from '../lib/live'
 
+const PRIMARY = [
+  { to: '/', label: 'Weekend', icon: Home, exact: true },
+  { to: '/championship', label: 'Championship', icon: Trophy, exact: false },
+  { to: '/briefing', label: 'Briefing', icon: FileText, exact: false },
+  { to: '/explore', label: 'Explore', icon: Compass, exact: false },
+] as const
+
+/**
+ * Nav renders one primary navigation system per breakpoint:
+ *   - Desktop/tablet: the top bar's `aria-label="Primary"` links.
+ *   - Mobile (≤640px): the bottom `aria-label="Primary"` bar; the top bar's links
+ *     are hidden via CSS so the two are never both active at once.
+ *
+ * Admin is an operator utility, deliberately outside every Primary landmark — it
+ * lives in a plain toolbar slot and never appears in the mobile bottom nav.
+ */
 export function Nav() {
-  const { data: liveState } = useQuery({
-    queryKey: ['live-state'],
-    queryFn: fetchLiveState,
-    staleTime: 5_000,
-    refetchInterval: 30_000,
-  })
-  const liveActive = isLiveSessionActive(liveState)
-
   return (
-    <nav className="app-nav">
+    <>
+      <header className="app-nav">
         <Link to="/" className="nav-logo">
           box<em>-</em>box
         </Link>
-      <div className="nav-links">
+        <nav className="nav-links" aria-label="Primary">
-        <Link to="/" activeProps={{ className: 'active' }} activeOptions={{ exact: true }}>
+          {PRIMARY.map(({ to, label, exact }) => (
-          Command
-        </Link>
             <Link
-          to="/live"
+              key={to}
-          className={liveActive ? 'nav-live nav-live-on' : 'nav-live'}
+              to={to}
               activeProps={{ className: 'active' }}
-          data-testid="nav-live"
+              activeOptions={exact ? { exact: true } : undefined}
-          data-live-active={liveActive ? 'true' : 'false'}
             >
-          {liveActive && <span className="nav-live-dot" aria-hidden="true" />}
+              {label}
-          Live
-          {liveActive && <span className="sr-only"> session active</span>}
             </Link>
-        <Link to="/race-hub" search={{}} activeProps={{ className: 'active' }}>
+          ))}
-          Race Hub
+        </nav>
-        </Link>
+        <div className="nav-utility" role="toolbar" aria-label="Operator utilities">
-        <Link to="/preview" activeProps={{ className: 'active' }}>
+          <Link
-          Preview
+            to="/admin"
-        </Link>
+            className="nav-utility-link"
-        <Link to="/championship" activeProps={{ className: 'active' }}>
+            activeProps={{ className: 'nav-utility-link active' }}
-          Championship
+          >
-        </Link>
-        <Link to="/briefing" activeProps={{ className: 'active' }}>
-          Briefing
-        </Link>
-      </div>
-      <div className="nav-utility">
-        <Link to="/admin" className="nav-utility-link" activeProps={{ className: 'nav-utility-link active' }}>
             Admin
           </Link>
         </div>
+      </header>
+
+      <nav className="app-bottom-nav" aria-label="Primary">
+        {PRIMARY.map(({ to, label, icon: Icon, exact }) => (
+          <Link
+            key={to}
+            to={to}
+            className="bottom-nav-link"
+            activeProps={{ className: 'bottom-nav-link active' }}
+            activeOptions={exact ? { exact: true } : undefined}
+          >
+            <Icon size={18} aria-hidden="true" />
+            <span>{label}</span>
+          </Link>
+        ))}
       </nav>
+    </>
   )
 }

frontend/src/components/OverviewView.tsx

@@ -1,6 +1,5 @@
 import type { RaceHub } from '../types'
 import { compareFinishPosition, formatDuration, formatGap, formatLapTime } from '../utils'
-import { countRaceHubDatasets } from '../lib/coverage'
 import { Thermometer, Map, Droplets, Wind, CloudRain } from 'lucide-react'
 
 interface Props {
@@ -17,7 +16,6 @@ export function OverviewView({ data }: Props) {
   const fastest = pickFastestLap(data)
   const latestWeather = data.weather.length > 0 ? data.weather[data.weather.length - 1] : null
   const rcHighlights = data.race_control.slice(-3).reverse()
-  const coverage = countRaceHubDatasets(data.datasets)
 
   const sessionType = (data.session?.session_type ?? '').toLowerCase()
   const isRace = sessionType.includes('race')
@@ -129,28 +127,6 @@ export function OverviewView({ data }: Props) {
             </ul>
           )}
         </section>
-
-        <section className="rh-panel ui-card">
-          <div className="sec-header">
-            <span className="sec-title">Local Coverage</span>
-            <span className="sec-meta mono">
-              {coverage.available}/{coverage.total}
-            </span>
-          </div>
-          <div className="rh-coverage-meter" aria-hidden="true">
-            <div
-              className="rh-coverage-fill"
-              style={{ width: `${(coverage.available / coverage.total) * 100}%` }}
-            />
-          </div>
-          <div className="rh-empty-line" style={{ marginTop: 'var(--s2)' }}>
-            {coverage.available === coverage.total
-              ? 'Every Race Hub dataset is local for this session.'
-              : `${coverage.total - coverage.available} dataset${
-                  coverage.total - coverage.available === 1 ? '' : 's'
-                } not ingested yet — see Data Status tab.`}
-          </div>
-        </section>
       </div>
     </div>
   )

frontend/src/components/PaddockBriefing.tsx

@@ -34,25 +34,25 @@ export function PaddockBriefing() {
 
   const { data: news, isLoading, isError } = useQuery({
     queryKey: ['news'],
-    queryFn: () => fetchNews(100),
+    queryFn: ({ signal }) => fetchNews(100, undefined, signal),
     staleTime: 60_000,
   })
 
   const seasonsQuery = useQuery({
     queryKey: ['seasons'],
-    queryFn: fetchSeasons,
+    queryFn: ({ signal }) => fetchSeasons(signal),
   })
   const latestSeason = seasonsQuery.data?.[0] ?? null
 
   const meetingsQuery = useQuery({
     queryKey: ['season-meetings', latestSeason],
-    queryFn: () => fetchSeasonMeetings(latestSeason!),
+    queryFn: ({ signal }) => fetchSeasonMeetings(latestSeason!, signal),
     enabled: latestSeason != null,
   })
 
   const hubQuery = useQuery({
     queryKey: ['championship-hub', latestSeason],
-    queryFn: () => fetchChampionshipHub(latestSeason!),
+    queryFn: ({ signal }) => fetchChampionshipHub(latestSeason!, signal),
     enabled: latestSeason != null,
   })
 

frontend/src/components/PreSessionView.tsx

@@ -0,0 +1,141 @@
+import type { Session } from '../types'
+import { RACE_HUB_DATASETS } from '../lib/coverage'
+import { formatCountdown, formatSessionScheduleTime, sessionStartTime } from '../lib/schedule'
+import {
+  sessionStateDescription,
+  type SessionState,
+} from '../lib/sessionState'
+
+const EXPECTED_LABELS: Record<string, string> = {
+  results: 'Final results',
+  starting_grid: 'Starting grid',
+  stints: 'Tyre strategy',
+  pit_stops: 'Pit stops',
+  positions: 'Position changes',
+  laps: 'Lap times',
+  race_control: 'Race control',
+  weather: 'Track conditions',
+}
+
+interface PreSessionProps {
+  session: Session
+  sessionName: string
+  now: Date
+}
+
+/**
+ * Purpose-built view for a session that has not run yet. Instead of rendering
+ * empty Winner / Podium / Pole / Strategy / Compare cards, it explains that the
+ * session is upcoming and previews the analysis that will appear once the data
+ * is ingested.
+ */
+export function PreSessionView({ session, sessionName, now }: PreSessionProps) {
+  const start = sessionStartTime(session)
+  const expected = RACE_HUB_DATASETS.filter((key) => EXPECTED_LABELS[key])
+
+  return (
+    <div className="rh-presession" data-testid="rh-presession">
+      <section className="rh-presession-band">
+        <span className="rh-presession-eyebrow mono">Upcoming session</span>
+        <h2 className="rh-presession-title">{sessionName}</h2>
+        <p className="rh-presession-sub">
+          This session hasn’t run yet, so there’s no result to analyse. Winner,
+          podium, pole, strategy and comparison views will appear here once the
+          session completes and its data is ingested.
+        </p>
+        <div className="rh-presession-countdown mono" data-testid="rh-presession-countdown">
+          {start
+            ? `Starts ${formatSessionScheduleTime(session.date_start)} · in ${formatCountdown(start, now)}`
+            : 'Start time to be confirmed.'}
+        </div>
+      </section>
+
+      <div className="data-section">
+        <div className="sec-header">
+          <span className="sec-title">Expected once complete</span>
+        </div>
+        <div className="rh-expected-grid">
+          {expected.map((key) => (
+            <div key={key} className="rh-expected-card">
+              <span className="rh-expected-dot" aria-hidden="true" />
+              <span>{EXPECTED_LABELS[key]}</span>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+interface PhaseProps {
+  state: Extract<SessionState, 'preparing' | 'unavailable' | 'cancelled'>
+  sessionName: string
+  onOpenDiagnostics?: () => void
+}
+
+/**
+ * Distinct fan-facing surfaces for settling/preparing and unavailable sessions.
+ * Genuine request failures stay on the page-level error recovery path.
+ */
+export function SessionPhaseView({ state, sessionName, onOpenDiagnostics }: PhaseProps) {
+  const title =
+    state === 'preparing'
+      ? 'Analysis preparing'
+      : state === 'cancelled'
+        ? 'Session cancelled'
+        : 'Analysis unavailable'
+
+  const testId =
+    state === 'preparing'
+      ? 'rh-preparing'
+      : state === 'cancelled'
+        ? 'rh-cancelled'
+        : 'rh-unavailable'
+
+  return (
+    <div className="rh-presession" data-testid={testId}>
+      <section className="rh-presession-band">
+        <span className="rh-presession-eyebrow mono">{sessionStateLabelEyebrow(state)}</span>
+        <h2 className="rh-presession-title">{title}</h2>
+        <p className="rh-presession-sub">
+          {sessionName}: {sessionStateDescription(state)}
+        </p>
+        {state === 'preparing' && (
+          <p className="rh-presession-sub">
+            Check back shortly, or open Diagnostics if you need raw dataset coverage.
+          </p>
+        )}
+        {onOpenDiagnostics && (state === 'preparing' || state === 'unavailable') && (
+          <div className="rh-empty-actions" style={{ marginTop: 'var(--s4)' }}>
+            <button type="button" className="rh-empty-action" onClick={onOpenDiagnostics}>
+              Open Diagnostics
+            </button>
+          </div>
+        )}
+      </section>
+    </div>
+  )
+}
+
+function sessionStateLabelEyebrow(state: PhaseProps['state']): string {
+  if (state === 'preparing') return 'Settling'
+  if (state === 'cancelled') return 'Cancelled'
+  return 'Unavailable'
+}
+
+interface PartialBannerProps {
+  onOpenDiagnostics?: () => void
+}
+
+export function PartialAnalysisBanner({ onOpenDiagnostics }: PartialBannerProps) {
+  return (
+    <div className="rh-partial-banner" data-testid="rh-partial-banner" role="status">
+      <span>Partial analysis — some datasets are still missing.</span>
+      {onOpenDiagnostics && (
+        <button type="button" className="rh-partial-banner-link" onClick={onOpenDiagnostics}>
+          Diagnostics
+        </button>
+      )}
+    </div>
+  )
+}

frontend/src/components/RaceStoryCanvas.tsx

@@ -704,7 +704,12 @@ export function RaceStoryCanvas({ data }: Props) {
       </div>
 
       {displayResults.length > 0 && (
-        <div className="rs-field-list">
+        <div
+          className="rs-field-list"
+          role="region"
+          aria-label="Final running order"
+          data-testid="race-story-outcome"
+        >
           {displayResults.map((r, i) => {
             const gridPos = grid.find((g) => g.driver_number === r.driver_number)?.position ?? 0
             const currentPos = scrubTime !== null ? i + 1 : r.position

frontend/src/components/RouteState.tsx

@@ -0,0 +1,163 @@
+import type { ReactNode } from 'react'
+import { isTimeoutError, userFacingError } from '../lib/fetch'
+import { noticeMessage, type DataAvailability } from '../lib/availability'
+
+export type { DataAvailability }
+
+export function availabilityLabel(kind: DataAvailability): string {
+  switch (kind) {
+    case 'local':
+      return 'Local'
+    case 'partial':
+      return 'Partial'
+    case 'stale':
+      return 'Stale'
+    case 'archive':
+      return 'Archive'
+    case 'limited':
+      return 'Limited'
+    case 'missing':
+      return 'Missing'
+  }
+}
+
+export function AvailabilityBadge({ kind, label }: { kind: DataAvailability; label?: string }) {
+  return (
+    <span className={`badge badge-${kind === 'archive' ? 'none' : kind}`} data-testid={`availability-${kind}`}>
+      {label ?? availabilityLabel(kind)}
+    </span>
+  )
+}
+
+export type RouteStateKind = 'loading' | 'empty' | 'error' | 'timeout'
+
+interface RouteStateProps {
+  kind: RouteStateKind
+  title?: string
+  message?: ReactNode
+  error?: unknown
+  onRetry?: () => void
+  retrying?: boolean
+  testId?: string
+  /** Optional override for the Retry button's data-testid (defaults to none). */
+  retryTestId?: string
+  className?: string
+  /** Optional availability strip (stale/limited/partial) above the state body. */
+  availability?: DataAvailability
+  children?: ReactNode
+}
+
+const DEFAULT_TITLES: Record<RouteStateKind, string> = {
+  loading: 'Loading…',
+  empty: 'Nothing here yet',
+  error: 'Could not load this view',
+  timeout: 'Request timed out',
+}
+
+const DEFAULT_MESSAGES: Record<RouteStateKind, string> = {
+  loading: 'Fetching the latest local data.',
+  empty: 'No data is available for this view yet.',
+  error: 'Something went wrong. Retry to try again.',
+  timeout: 'This request took too long. Check your connection, then retry.',
+}
+
+/**
+ * Shared primary-route state surface: loading, empty, timeout/error + retry.
+ * Retry is a real <button> (keyboard accessible) and callers should gate
+ * concurrent refetches via React Query / deduped apiFetch.
+ */
+export function RouteState({
+  kind,
+  title,
+  message,
+  error,
+  onRetry,
+  retrying = false,
+  testId,
+  retryTestId,
+  className = '',
+  availability,
+  children,
+}: RouteStateProps) {
+  const resolvedKind: RouteStateKind =
+    kind === 'error' && isTimeoutError(error) ? 'timeout' : kind
+
+  const resolvedMessage =
+    message ??
+    (error != null && (resolvedKind === 'error' || resolvedKind === 'timeout')
+      ? userFacingError(error)
+      : DEFAULT_MESSAGES[resolvedKind])
+
+  const showRetry =
+    (resolvedKind === 'error' || resolvedKind === 'timeout') && typeof onRetry === 'function'
+
+  return (
+    <div
+      className={`route-state route-state-${resolvedKind} ${className}`.trim()}
+      data-testid={testId ?? `route-state-${resolvedKind}`}
+      role={resolvedKind === 'error' || resolvedKind === 'timeout' ? 'alert' : undefined}
+    >
+      {availability && (
+        <div className="route-state-availability">
+          <AvailabilityBadge kind={availability} />
+        </div>
+      )}
+      {resolvedKind === 'loading' ? (
+        <div className="loading-state">{title ?? 'loading…'}</div>
+      ) : (
+        <>
+          <div className="route-state-title">{title ?? DEFAULT_TITLES[resolvedKind]}</div>
+          <div className="route-state-message">{resolvedMessage}</div>
+          {children}
+          {showRetry && (
+            <button
+              type="button"
+              className="route-state-retry"
+              onClick={onRetry}
+              disabled={retrying}
+              aria-busy={retrying || undefined}
+              data-testid={retryTestId}
+            >
+              {retrying ? 'Retrying…' : 'Retry'}
+            </button>
+          )}
+        </>
+      )}
+    </div>
+  )
+}
+
+interface StaleNoticeProps {
+  availability?: DataAvailability
+  message?: string
+  onRetry?: () => void
+  retrying?: boolean
+  testId?: string
+}
+
+/** Inline notice when a successful payload is limited/stale/partial. */
+export function DataNotice({
+  availability = 'stale',
+  message,
+  onRetry,
+  retrying = false,
+  testId = 'data-notice',
+}: StaleNoticeProps) {
+  return (
+    <div className="data-notice" data-testid={testId} role="status">
+      <AvailabilityBadge kind={availability} />
+      <span className="data-notice-text">{message ?? noticeMessage(availability)}</span>
+      {onRetry && (
+        <button
+          type="button"
+          className="route-state-retry data-notice-retry"
+          onClick={onRetry}
+          disabled={retrying}
+          aria-busy={retrying || undefined}
+        >
+          {retrying ? 'Retrying…' : 'Retry'}
+        </button>
+      )}
+    </div>
+  )
+}

frontend/src/components/TabBar.tsx

@@ -8,15 +8,46 @@ export type Tab =
   | 'race_control'
   | 'data_status'
 
-const TABS: { id: Tab; label: string }[] = [
+interface TabDef {
+  id: Tab
+  label: string
+}
+
+interface TabGroup {
+  id: string
+  label: string
+  tabs: TabDef[]
+}
+
+// Fan-facing hierarchy: Story first, then Analysis, then Data/Context. Every
+// existing capability is preserved — only the grouping and ordering change.
+const TAB_GROUPS: TabGroup[] = [
+  {
+    id: 'story',
+    label: 'Story',
+    tabs: [
       { id: 'overview', label: 'Overview' },
       { id: 'race_story', label: 'Race Story' },
+    ],
+  },
+  {
+    id: 'analysis',
+    label: 'Analysis',
+    tabs: [
       { id: 'strategy', label: 'Strategy' },
       { id: 'compare', label: 'Compare' },
       { id: 'lap_data', label: 'Lap Data' },
+    ],
+  },
+  {
+    id: 'context',
+    label: 'Data & Context',
+    tabs: [
       { id: 'conditions', label: 'Conditions' },
       { id: 'race_control', label: 'Race Control' },
-  { id: 'data_status', label: 'Data Status' },
+      { id: 'data_status', label: 'Diagnostics' },
+    ],
+  },
 ]
 
 interface Props {
@@ -26,8 +57,14 @@ interface Props {
 
 export function TabBar({ active, onChange }: Props) {
   return (
-    <div className="tab-bar" role="tablist">
+    <div className="tab-bar tab-bar-grouped" role="tablist" data-testid="rh-tabbar">
-      {TABS.map((t) => (
+      {TAB_GROUPS.map((group) => (
+        <div key={group.id} className="tab-group" data-testid={`rh-tabgroup-${group.id}`}>
+          <span className="tab-group-label mono" aria-hidden="true">
+            {group.label}
+          </span>
+          <div className="tab-group-btns">
+            {group.tabs.map((t) => (
               <button
                 key={t.id}
                 role="tab"
@@ -39,5 +76,8 @@ export function TabBar({ active, onChange }: Props) {
               </button>
             ))}
           </div>
+        </div>
+      ))}
+    </div>
   )
 }

frontend/src/components/WeekendSwitcher.tsx

@@ -2,41 +2,60 @@ import { useEffect, useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
 import { useNavigate } from '@tanstack/react-router'
 import { fetchLocalMeetings, fetchSeasons, fetchWeekend } from '../api'
-import { formatCoverageHint, sessionTypeAbbrev } from '../lib/coverage'
+import { sessionTypeAbbrev } from '../lib/coverage'
+import {
+  resolveSessionState,
+  sessionStateDotClass,
+  sessionStateLabel,
+} from '../lib/sessionState'
 import { countryDecal, formatGpDateRange } from '../lib/gpIdentity'
+import type { WeekendContext } from '../types'
 
 interface Props {
   currentMeetingKey?: number
   currentSessionKey?: number
+  context?: WeekendContext | null
+  now?: Date
   onClose: () => void
 }
 
-export function WeekendSwitcher({ currentMeetingKey, currentSessionKey, onClose }: Props) {
+export function WeekendSwitcher({
+  currentMeetingKey,
+  currentSessionKey,
+  context,
+  now: nowProp,
+  onClose,
+}: Props) {
   const navigate = useNavigate()
-  const seasonsQuery = useQuery({ queryKey: ['seasons'], queryFn: fetchSeasons })
+  const seasonsQuery = useQuery({ queryKey: ['seasons'], queryFn: ({ signal }) => fetchSeasons(signal) })
   const [year, setYear] = useState<number | null>(null)
   const [openMeetingKey, setOpenMeetingKey] = useState<number | null>(
     currentMeetingKey ?? null,
   )
-
+  const now = nowProp ?? new Date()
-  useEffect(() => {
-    if (year == null && seasonsQuery.data?.length) {
-      setYear(seasonsQuery.data[0])
-    }
-  }, [seasonsQuery.data, year])
-
-  const meetingsQuery = useQuery({
-    queryKey: ['meetings', year],
-    queryFn: () => fetchLocalMeetings(year!),
-    enabled: year != null,
-  })
 
   const weekendQuery = useQuery({
     queryKey: ['weekend', openMeetingKey],
-    queryFn: () => fetchWeekend(openMeetingKey!),
+    queryFn: ({ signal }) => fetchWeekend(openMeetingKey!, signal),
     enabled: openMeetingKey != null,
   })
 
+  useEffect(() => {
+    if (year != null) return
+    const currentYear = weekendQuery.data?.meeting?.year
+    if (currentYear) {
+      setYear(currentYear)
+    } else if (seasonsQuery.data?.length) {
+      setYear(seasonsQuery.data[0])
+    }
+  }, [seasonsQuery.data, weekendQuery.data, year])
+
+  const meetingsQuery = useQuery({
+    queryKey: ['meetings', year],
+    queryFn: ({ signal }) => fetchLocalMeetings(year!, signal),
+    enabled: year != null,
+  })
+
   const seasons = seasonsQuery.data ?? []
   const meetings = meetingsQuery.data ?? []
   const weekend = weekendQuery.data
@@ -47,7 +66,7 @@ export function WeekendSwitcher({ currentMeetingKey, currentSessionKey, onClose
   }
 
   return (
-    <div id="rh-weekend-switcher" className="rh-switcher" data-testid="rh-switcher">
+    <div className="rh-switcher" data-testid="rh-switcher">
       <div className="rh-switcher-head">
         <span className="sec-title">Switch Weekend</span>
         <div className="rh-switcher-years">
@@ -106,9 +125,16 @@ export function WeekendSwitcher({ currentMeetingKey, currentSessionKey, onClose
                     {weekendQuery.isLoading && (
                       <div className="rh-switcher-empty">loading sessions…</div>
                     )}
-                    {weekend && weekend.meeting_key === m.meeting_key &&
+                    {weekend &&
-                      weekend.sessions.map(({ session, source, datasets }) => {
+                      weekend.meeting_key === m.meeting_key &&
+                      weekend.sessions.map((weekendSession) => {
+                        const { session } = weekendSession
                         const active = session.session_key === currentSessionKey
+                        const state = resolveSessionState({
+                          weekendSession,
+                          context,
+                          now,
+                        })
                         return (
                           <button
                             key={session.session_key}
@@ -122,8 +148,11 @@ export function WeekendSwitcher({ currentMeetingKey, currentSessionKey, onClose
                             </span>
                             <span className="rh-switcher-sess-name">{session.session_name}</span>
                             <span className="rh-switcher-sess-cov mono">
-                              <span className={`cc-cov-dot cc-cov-${source}`} aria-hidden="true" />
+                              <span
-                              {formatCoverageHint(datasets)}
+                                className={`cc-cov-dot ${sessionStateDotClass(state)}`}
+                                aria-hidden="true"
+                              />
+                              {sessionStateLabel(state)}
                             </span>
                           </button>
                         )

frontend/src/components/live/LiveHandoff.tsx

@@ -0,0 +1,263 @@
+import { Archive, ChevronRight, Flag, Radio } from 'lucide-react'
+import type { LiveTimingRow } from '../../lib/live'
+import { driverCode } from '../../lib/live'
+import type { TransportHealth } from '../../lib/liveState'
+import { feedHealthLabel } from '../../lib/liveState'
+import type { ContextSession, WeekendContext } from '../../types'
+import { analysisSessionKey } from '../../lib/weekendContext'
+import { formatSessionScheduleTime } from '../../lib/schedule'
+
+interface Props {
+  /** 'settling' immediately after a session; 'inactive' when nothing is live. */
+  phase: 'settling' | 'inactive'
+  transport: TransportHealth
+  /** Canonical weekend context (issue #72). May be undefined before it loads. */
+  context: WeekendContext | undefined
+  /** Top rows of the final snapshot (settling only), already position-sorted. */
+  rows: LiveTimingRow[]
+  capturedAt?: string | null
+  hasArchive: boolean
+  onViewArchive: () => void
+}
+
+function formatCapturedAt(capturedAt: string | null | undefined): string {
+  if (!capturedAt) return ''
+  const date = new Date(capturedAt)
+  if (Number.isNaN(date.getTime())) return ''
+  return date.toLocaleString()
+}
+
+function sessionKeyOf(session: ContextSession | undefined): number | undefined {
+  const key = session?.session.session_key
+  return key && key > 0 ? key : undefined
+}
+
+/**
+ * Fully ingested analysis (local_analysis === complete). Stricter than
+ * hasLocalAnalysis, which also treats partial as link-worthy — Live polling
+ * and "ready" chrome wait for the complete state.
+ */
+export function analysisIsReady(session: ContextSession | undefined): boolean {
+  return session?.availability?.local_analysis === 'complete'
+}
+
+/**
+ * Analysis target for the Live handoff surface.
+ *
+ * Settling must follow the just-finished session (`previous_completed_session`).
+ * The canonical backend can mark that session archive-complete while leaving
+ * `default_analysis_session` on an older already-ingested practice/qualifying —
+ * preferring default here would link/poll/label the wrong race.
+ *
+ * Inactive keeps the shared default-first preference via analysisSessionKey.
+ */
+export function handoffAnalysisSession(
+  context: WeekendContext | undefined,
+  phase: 'settling' | 'inactive',
+): ContextSession | undefined {
+  if (!context) return undefined
+  if (phase === 'settling') {
+    if (sessionKeyOf(context.previous_completed_session)) {
+      return context.previous_completed_session
+    }
+    return sessionKeyOf(context.default_analysis_session)
+      ? context.default_analysis_session
+      : undefined
+  }
+  const key = analysisSessionKey(context)
+  if (!key) return undefined
+  if (context.default_analysis_session?.session.session_key === key) {
+    return context.default_analysis_session
+  }
+  return context.previous_completed_session
+}
+
+/**
+ * Keep polling weekend-context while the just-finished session (or, absent
+ * that, the default analysis session) is still ingesting. An older ready
+ * default must not stop the settle→ready transition.
+ */
+export function shouldPollHandoffAnalysis(context: WeekendContext | undefined): boolean {
+  if (!context) return true
+  const previous = context.previous_completed_session
+  if (sessionKeyOf(previous) && !analysisIsReady(previous)) return true
+  const fallback = context.default_analysis_session
+  if (sessionKeyOf(fallback) && !analysisIsReady(fallback)) return true
+  return !sessionKeyOf(previous) && !sessionKeyOf(fallback)
+}
+
+export function LiveHandoff({
+  phase,
+  transport,
+  context,
+  rows,
+  capturedAt,
+  hasArchive,
+  onViewArchive,
+}: Props) {
+  const isSettling = phase === 'settling'
+  const testid = isSettling ? 'live-settling' : 'live-inactive'
+  const capturedLabel = formatCapturedAt(capturedAt)
+
+  const focusName = context?.focus_meeting?.meeting_name
+  const activeName = context?.active_session?.meeting?.meeting_name
+  const title = focusName || activeName || 'Live Timing'
+  const topRows = rows.slice(0, 3)
+
+  const analysis = handoffAnalysisSession(context, phase)
+  const analysisKey = sessionKeyOf(analysis)
+  const analysisName = analysis?.session.session_name || 'session'
+  const analysisReady = analysisIsReady(analysis)
+
+  const next = context?.next_session
+  const previous = context?.previous_completed_session
+  // Avoid a duplicate recap card when previous == the analysis target.
+  const showRecap =
+    previous && previous.session.session_key !== analysisKey && previous.session.session_key !== 0
+
+  return (
+    <section className={`live-handoff live-handoff-${phase}`} data-testid={testid}>
+      <header className="live-handoff-head">
+        <span className="live-handoff-eyebrow mono">
+          {isSettling ? (
+            <>
+              <Flag size={13} /> SESSION SETTLING
+            </>
+          ) : (
+            <>
+              <Radio size={13} /> NO LIVE SESSION
+            </>
+          )}
+        </span>
+        <h1 className="live-handoff-title">{title}</h1>
+        {isSettling && capturedLabel && (
+          <p className="live-handoff-captured mono" data-testid="live-handoff-captured">
+            Final feed snapshot captured {capturedLabel}
+          </p>
+        )}
+        {!isSettling && (
+          <p className="live-handoff-sub">
+            The timing feed is quiet between sessions. Here&apos;s where the weekend stands.
+          </p>
+        )}
+        <span className={`live-feed-health live-feed-${transport} live-handoff-feed`}>
+          <span className="live-feed-dot" aria-hidden="true" />
+          {feedHealthLabel(transport)}
+        </span>
+      </header>
+
+      {isSettling && topRows.length > 0 && (
+        <div className="live-handoff-snapshot" data-testid="live-handoff-snapshot">
+          <span className="live-handoff-snapshot-label mono">Provisional order at chequered</span>
+          <ol className="live-handoff-order">
+            {topRows.map((row) => (
+              <li key={row.RacingNumber}>
+                <span className="mono">P{row.Position}</span>
+                <span className="live-handoff-code">{driverCode(row)}</span>
+              </li>
+            ))}
+          </ol>
+        </div>
+      )}
+
+      <div className="live-handoff-actions">
+        {analysisKey ? (
+          <a
+            className="live-handoff-action live-handoff-primary"
+            href={`/race-hub?session_key=${analysisKey}`}
+            data-testid="live-handoff-analysis"
+            data-ready={analysisReady ? 'true' : 'false'}
+          >
+            <span className="live-handoff-action-body">
+              <span className="live-handoff-action-label">
+                {isSettling ? `Open ${analysisName} analysis` : `Open ${analysisName} in Race Hub`}
+              </span>
+              <span className="live-handoff-action-meta mono">
+                {analysisReady
+                  ? 'Full timing, strategy & story ready'
+                  : isSettling
+                    ? 'Settling — analysis will fill in as data ingests'
+                    : 'Analysis will fill in as data ingests'}
+              </span>
+            </span>
+            <ChevronRight size={18} />
+          </a>
+        ) : (
+          <div
+            className="live-handoff-action live-handoff-pending"
+            data-testid="live-handoff-analysis-pending"
+          >
+            <span className="live-handoff-action-body">
+              <span className="live-handoff-action-label">Analysis not ready yet</span>
+              <span className="live-handoff-action-meta mono">
+                The completed session will appear in Race Hub once it is ingested.
+              </span>
+            </span>
+          </div>
+        )}
+
+        {next && (
+          <div className="live-handoff-action live-handoff-next" data-testid="live-handoff-next">
+            <span className="live-handoff-action-body">
+              <span className="live-handoff-action-label">
+                Up next · {next.session.session_name}
+              </span>
+              <span className="live-handoff-action-meta mono">
+                {formatSessionScheduleTime(next.session.date_start)}
+              </span>
+            </span>
+          </div>
+        )}
+
+        {showRecap && (
+          <a
+            className="live-handoff-action"
+            href={`/race-hub?session_key=${previous!.session.session_key}`}
+            data-testid="live-handoff-recap"
+          >
+            <span className="live-handoff-action-body">
+              <span className="live-handoff-action-label">
+                Recap · {previous!.session.session_name}
+              </span>
+              <span className="live-handoff-action-meta mono">
+                Review the last completed session
+              </span>
+            </span>
+            <ChevronRight size={18} />
+          </a>
+        )}
+
+        {hasArchive && (
+          <button
+            type="button"
+            className="live-handoff-action live-handoff-archive-btn"
+            onClick={onViewArchive}
+            data-testid="live-handoff-archive"
+          >
+            <span className="live-handoff-action-body">
+              <span className="live-handoff-action-label">
+                <Archive size={14} /> View full timing (read-only)
+              </span>
+              <span className="live-handoff-action-meta mono">
+                Frozen final snapshot — no live updates
+              </span>
+            </span>
+            <ChevronRight size={18} />
+          </button>
+        )}
+
+        {!analysisKey && !next && !showRecap && !hasArchive && (
+          <div className="live-handoff-fallback" data-testid="live-handoff-fallback">
+            <a href="/" className="live-handoff-action">
+              <span className="live-handoff-action-body">
+                <span className="live-handoff-action-label">Weekend</span>
+                <span className="live-handoff-action-meta mono">Weekend schedule &amp; standings</span>
+              </span>
+              <ChevronRight size={18} />
+            </a>
+          </div>
+        )}
+      </div>
+    </section>
+  )
+}

frontend/src/components/live/RaceControlFeed.tsx

@@ -80,9 +80,7 @@ export function RaceControlFeed({ messages, driverInfo }: Props) {
     <section className="live-rc panel-glass">
       <div className="sec-header sticky-header">
         <span className="sec-title">Race Control</span>
-        <span className="sec-meta" data-testid="rc-timezone">
+        {messages.length > 0 && <span className="sec-meta">{messages.length} messages</span>}
-          {messages.length > 0 ? `${messages.length} messages · ` : ''}times UTC
-        </span>
       </div>
       {latest.length === 0 ? (
         <div className="missing-notice">No race control messages in the current live snapshot.</div>
@@ -104,7 +102,7 @@ export function RaceControlFeed({ messages, driverInfo }: Props) {
 
             return (
               <div className={`live-rc-row${flashClass}`} key={key}>
-                <span className="rc-time" title="UTC">{message.Time || '--:--'}</span>
+                <span className="rc-time">{message.Time || '--:--'}</span>
                 {message.Lap > 0 && <span className="rc-lap">L{message.Lap}</span>}
                 {message.Flag
                   ? <span className={`rc-flag ${rcFlagClass(message.Flag)}`}>{message.Flag}</span>

frontend/src/components/live/SessionBanner.tsx

@@ -1,30 +1,60 @@
 import type { LiveStreamData } from '../../types'
 import type { LiveTimingRow } from '../../lib/live'
 import { extrapolateClock, liveSessionDisplay } from '../../lib/live'
+import type { LivePhase, TransportHealth } from '../../lib/liveState'
+import { feedHealthLabel } from '../../lib/liveState'
 import { WeatherStrip } from './WeatherStrip'
 
 interface Props {
-  isLive: boolean
+  /** Which of the live phases we are rendering: 'live' | 'disconnected' | 'archive'. */
-  isArchive?: boolean
+  phase: LivePhase
   snapshot: LiveStreamData
   rows: LiveTimingRow[]
-  connection: 'connected' | 'connecting' | 'disconnected' | 'error'
+  transport: TransportHealth
   now: number
+  /** ISO capture time — required for archive, shown as the timestamp of record. */
+  capturedAt?: string | null
 }
 
-export function SessionBanner({ isLive, isArchive = false, snapshot, rows, connection, now }: Props) {
+function formatCapturedAt(capturedAt: string | null | undefined): string {
+  if (!capturedAt) return ''
+  const date = new Date(capturedAt)
+  if (Number.isNaN(date.getTime())) return ''
+  return date.toLocaleString()
+}
+
+export function SessionBanner({ phase, snapshot, rows, transport, now, capturedAt }: Props) {
   const session = snapshot.Session
-  const clock = extrapolateClock(snapshot.Clock, snapshot.ClockRefTime, snapshot.ClockExtrapolating, now)
+  const isArchive = phase === 'archive'
+  const isLiveSession = phase === 'live' || phase === 'disconnected'
+  // Archive is a frozen single frame: never extrapolate a running clock for it.
+  const clock = isArchive
+    ? ''
+    : extrapolateClock(snapshot.Clock, snapshot.ClockRefTime, snapshot.ClockExtrapolating, now)
   const display = liveSessionDisplay(session, rows)
   const atRiskLabel =
     display.atRiskStart && display.atRiskEnd ? `P${display.atRiskStart}-P${display.atRiskEnd} at risk` : ''
-  const stateLabel = isLive ? 'live' : isArchive ? 'archive' : 'stale'
+  const capturedLabel = formatCapturedAt(capturedAt)
 
   return (
-    <section className="live-banner">
+    <section className={`live-banner${isArchive ? ' live-banner-archive' : ''}`} data-testid="live-banner">
       <div className="live-banner-row">
         <div className="live-banner-main">
-          <span className={`live-conn live-conn-${connection}`}>{connection}</span>
+          {isArchive ? (
+            <span className="live-session-flag live-session-flag-archive" data-testid="live-archive-flag">
+              ARCHIVE
+            </span>
+          ) : (
+            <span
+              className={`live-session-flag live-session-flag-live${
+                phase === 'disconnected' ? ' is-stale' : ''
+              }`}
+              data-testid="live-session-flag"
+            >
+              <span className="live-session-dot" aria-hidden="true" />
+              LIVE SESSION
+            </span>
+          )}
           <div>
             <h1>{session?.MeetingName || 'Live Timing'}</h1>
             <p>
@@ -33,17 +63,40 @@ export function SessionBanner({ isLive, isArchive = false, snapshot, rows, conne
           </div>
         </div>
         <div className="live-session-board">
-          {display.phaseLabel && <span className="live-phase-pill mono">{display.phaseLabel}</span>}
+          {/* Feed health is strictly secondary and only present for a live session. */}
-          <div className="live-clock mono" data-testid="live-clock">{clock || '--:--:--'}</div>
+          {isLiveSession && (
-          <div className="live-banner-meta">
+            <span
-            {display.advanceCount && <span>{display.advanceCount} advance</span>}
+              className={`live-feed-health live-feed-${transport}`}
-            {atRiskLabel && <span>{atRiskLabel}</span>}
+              data-testid="live-feed-health"
-            {display.isRace && (
+              title="Transport health — independent of session state"
-              <span data-testid="live-lap-counter">
+            >
-                L<strong>{snapshot.CurrentLap || '-'}</strong>/<strong>{snapshot.TotalLaps || '-'}</strong>
+              <span className="live-feed-dot" aria-hidden="true" />
+              {feedHealthLabel(transport)}
             </span>
           )}
-            <span className={isLive ? 'live-state live-state-on' : 'live-state'}>{stateLabel}</span>
+          {isArchive ? (
+            <div className="live-archive-stamp" data-testid="live-archive-stamp">
+              <span className="live-archive-readonly mono">READ-ONLY</span>
+              {capturedLabel && <span className="live-archive-captured mono">captured {capturedLabel}</span>}
+            </div>
+          ) : (
+            <>
+              {display.phaseLabel && <span className="live-phase-pill mono">{display.phaseLabel}</span>}
+              <div className="live-clock mono" data-testid="live-clock">{clock || '--:--:--'}</div>
+            </>
+          )}
+          <div className="live-banner-meta">
+            {!isArchive && display.advanceCount && <span>{display.advanceCount} advance</span>}
+            {!isArchive && atRiskLabel && <span>{atRiskLabel}</span>}
+            <span>
+              L<strong>{snapshot.CurrentLap || '-'}</strong>/<strong>{snapshot.TotalLaps || '-'}</strong>
+            </span>
+            {!isArchive && (
+              <span className={phase === 'live' ? 'live-state live-state-on' : 'live-state'}>
+                {phase === 'live' ? 'live' : 'stale'}
+              </span>
+            )}
+            {isArchive && <span className="live-state live-state-archive">archive</span>}
           </div>
         </div>
       </div>

frontend/src/components/live/TimingTower.tsx

@@ -1,10 +1,9 @@
-import { useState, useMemo, Fragment } from 'react'
+import { useState, Fragment } from 'react'
 import { teamColor } from '../../utils'
 import { useAutoAnimate } from '@formkit/auto-animate/react'
 import type { LiveSessionMeta, LiveStintData } from '../../types'
 import type { LiveTimingRow } from '../../lib/live'
 import {
-  bestLapGaps,
   driverCode,
   liveSessionDisplay,
   positionDelta,
@@ -63,10 +62,6 @@ export function TimingTower({
   const isQuali = sessionDisplay.isQualifying || !isRace
   const columnCount = 7 + (isRace ? 3 : 0) + (isQuali ? 3 : 0)
 
-  // Practice/qualifying: derive a display-only gap to P1 from valid best laps
-  // when the upstream feed omits GapToLeader. Empty for races (feed is truth).
-  const practiceGaps = useMemo(() => bestLapGaps(isRace ? [] : rows), [isRace, rows])
-
   return (
     <div className="scroll-x">
       <table className="data-table live-tower" style={{ minWidth: 760 }}>
@@ -76,7 +71,7 @@ export function TimingTower({
             {isRace && <th>Δ</th>}
             <th>Driver</th>
             <th>Tyre</th>
-            <th className={isRace ? undefined : 'hide-mobile'}>Last Lap</th>
+            <th>Last Lap</th>
             <th 
               className="interactive" 
               onClick={() => setGapMode(g => g === 'interval' ? 'leader' : 'interval')}
@@ -86,10 +81,10 @@ export function TimingTower({
               {gapMode === 'interval' && isRace ? 'Interval' : 'Gap to P1'}
             </th>
             {isRace && <th>Trend</th>}
-            {isQuali && <th className="hide-mobile">S1</th>}
+            {isQuali && <th>S1</th>}
-            {isQuali && <th className="hide-mobile">S2</th>}
+            {isQuali && <th>S2</th>}
-            {isQuali && <th className="hide-mobile">S3</th>}
+            {isQuali && <th>S3</th>}
-            <th className={isRace ? 'hide-mobile' : undefined}>Best</th>
+            <th className="hide-mobile">Best</th>
             {isRace && <th className="hide-mobile r">Laps</th>}
             <th className="r"></th>
           </tr>
@@ -107,15 +102,7 @@ export function TimingTower({
               driver.Cutoff
             const showCutoffAfter = row.Position === sessionDisplay.cutoffPosition
 
-            let gapText: string
+            const gapText = gapMode === 'interval' && isRace ? (driver.Interval || driver.GapToLeader) : driver.GapToLeader
-            if (isRace) {
-              gapText = gapMode === 'interval' ? (driver.Interval || driver.GapToLeader) : driver.GapToLeader
-            } else if (driver.GapToLeader) {
-              gapText = driver.GapToLeader
-            } else {
-              const computed = practiceGaps[row.RacingNumber]
-              gapText = computed ? (computed.isLeader ? '—' : computed.gap) : ''
-            }
             const intervalAnnotation =
               gapMode === 'interval' && isRace && row.Position > 1
                 ? intervalMeaning(parseIntervalSeconds(gapText))
@@ -166,10 +153,7 @@ export function TimingTower({
                   <td>
                     <span className={`tyre-badge ${tyreClass(row.Tyre)}`}>{tyreLabel(row.Tyre)}</span>
                   </td>
-                  <td className={[
+                  <td className={driver.LastLapOB ? 'mono lap-ob' : driver.LastLapPB ? 'mono lap-pb' : 'mono'}>
-                    isRace ? '' : 'hide-mobile',
-                    driver.LastLapOB ? 'mono lap-ob' : driver.LastLapPB ? 'mono lap-pb' : 'mono',
-                  ].filter(Boolean).join(' ')}>
                     {driver.LastLapTime || '-'}
                   </td>
                   <td className="mono">
@@ -187,14 +171,11 @@ export function TimingTower({
                     </td>
                   )}
 
-                  {isQuali && <td className="hide-mobile">{renderSector(0)}</td>}
+                  {isQuali && <td>{renderSector(0)}</td>}
-                  {isQuali && <td className="hide-mobile">{renderSector(1)}</td>}
+                  {isQuali && <td>{renderSector(1)}</td>}
-                  {isQuali && <td className="hide-mobile">{renderSector(2)}</td>}
+                  {isQuali && <td>{renderSector(2)}</td>}
 
-                  <td className={[
+                  <td className={`hide-mobile ${driver.BestLapOB ? 'mono lap-ob' : 'mono'}`}>
-                    isRace ? 'hide-mobile' : '',
-                    driver.BestLapOB ? 'mono lap-ob' : 'mono',
-                  ].filter(Boolean).join(' ')}>
                     {driver.BestLapTime || '-'}
                   </td>
                   
@@ -227,16 +208,6 @@ export function TimingTower({
                                  <div className="mono">{driver.NumberOfLaps || 0}</div>
                               </div>
                             )}
-                            {!isRace && driver.Sectors?.some((sec) => sec?.Value) && (
-                              <div data-testid="expanded-sectors">
-                                 <div className="mono" style={{ color: 'var(--text-3)', fontSize: '10px', marginBottom: '4px' }}>SECTORS</div>
-                                 <div className="mono" style={{ display: 'flex', gap: '10px' }}>
-                                    {renderSector(0)}
-                                    {renderSector(1)}
-                                    {renderSector(2)}
-                                 </div>
-                              </div>
-                            )}
                             {driver.SpeedTrap && (
                               <div>
                                  <div className="mono" style={{ color: 'var(--text-3)', fontSize: '10px', marginBottom: '4px' }}>SPEED TRAP</div>

frontend/src/components/live/TyreDegPanel.tsx

@@ -52,9 +52,7 @@ function StintSparkline({ seconds }: { seconds: number[] }) {
 }
 
 export function TyreDegPanel({ rows, sessionType, pinned }: Props) {
-  const isRace = isRaceSession(sessionType)
+  const [collapsed, setCollapsed] = useState(false)
-  const [collapsed, setCollapsed] = useState(true)
-  const [readerChose, setReaderChose] = useState(false)
   const [stints, setStints] = useState<StintHistoryMap>({})
 
   // One lap-history update per received snapshot (rows is rebuilt per snapshot).
@@ -63,6 +61,8 @@ export function TyreDegPanel({ rows, sessionType, pinned }: Props) {
     setStints((prev) => recordStintSamples(prev, rows.map(stintInputFromRow)))
   }, [rows])
 
+  const isRace = isRaceSession(sessionType)
+
   const visible = useMemo(
     () =>
       rows.filter(
@@ -74,30 +74,6 @@ export function TyreDegPanel({ rows, sessionType, pinned }: Props) {
     [rows, pinned],
   )
 
-  // One linear fit per driver per snapshot, shared by the readiness check and
-  // the rows below. degradationModel is O(laps) and this runs at feed rate.
-  const models = useMemo(() => {
-    const out: Record<string, ReturnType<typeof degradationModel>> = {}
-    for (const row of visible) {
-      out[row.RacingNumber] = degradationModel(stints[row.RacingNumber]?.samples ?? [])
-    }
-    return out
-  }, [visible, stints])
-
-  // Before any stint has enough clean laps to fit, every row reads "warming
-  // up" — a full-height panel of placeholders that pushed the Timing Tower off
-  // the fold for the first third of a race. Stay collapsed until there is
-  // something to say, then open. A reader who has toggled it keeps their choice.
-  const hasSignal = useMemo(
-    () => visible.some((row) => models[row.RacingNumber] != null),
-    [visible, models],
-  )
-
-  useEffect(() => {
-    if (readerChose) return
-    setCollapsed(!(isRace && hasSignal))
-  }, [isRace, hasSignal, readerChose])
-
   if (visible.length === 0) return null
 
   return (
@@ -105,25 +81,18 @@ export function TyreDegPanel({ rows, sessionType, pinned }: Props) {
       <button
         type="button"
         className="sec-header tyredeg-toggle"
-        onClick={() => {
+        onClick={() => setCollapsed((prev) => !prev)}
-          setReaderChose(true)
-          setCollapsed((prev) => !prev)
-        }}
         aria-expanded={!collapsed}
       >
         <span className="sec-title">Tyre Deg &amp; Pit Window</span>
-        {!hasSignal ? (
+        {isRace && <span className="sec-meta">rejoin assumes ~{PIT_LOSS_SECONDS}s pit loss</span>}
-          <span className="sec-meta">collecting clean laps</span>
-        ) : (
-          isRace && <span className="sec-meta">rejoin assumes ~{PIT_LOSS_SECONDS}s pit loss</span>
-        )}
         <span className="tyredeg-chevron" aria-hidden="true">{collapsed ? '▸' : '▾'}</span>
       </button>
 
       {!collapsed && (
         <div className="tyredeg-rows">
           {visible.map((row) => {
-            const model = models[row.RacingNumber]
+            const model = degradationModel(stints[row.RacingNumber]?.samples ?? [])
             const rejoin = isRace ? estimatePitRejoin(rows, row.RacingNumber) : null
             const ageAnnotation = tyreAgeMeaning(row.Tyre?.Compound, row.Tyre?.Age)
             return (

frontend/src/components/weekend/BetweenRacesView.tsx

@@ -0,0 +1,152 @@
+import { Link } from '@tanstack/react-router'
+import { ChevronRight, Flag as FlagIcon } from 'lucide-react'
+import type {
+  WeekendBriefingItem,
+  WeekendChampionshipImpact,
+  WeekendContext,
+  WeekendViewState,
+} from '../../types'
+import {
+  BriefingStrip,
+  ChampionshipImpactCard,
+  ChampionshipRoundStrip,
+  CountdownDisplay,
+  EventPodium,
+  Flag,
+} from './shared'
+import { analysisSessionKey, meetingIdentity } from '../../lib/weekendContext'
+import { parseScheduleTime } from '../../lib/schedule'
+
+const EYEBROW: Record<string, string> = {
+  between_weekends: 'Between races',
+  post_weekend: 'Post-weekend',
+  season_complete: 'Season complete',
+}
+
+function formatSessionLine(name: string | undefined, start: string | undefined): string {
+  if (!name) return 'Schedule to be confirmed'
+  const date = start ? parseScheduleTime(start) : null
+  if (!date) return name
+  const when = date.toLocaleString('en-GB', {
+    weekday: 'long',
+    hour: '2-digit',
+    minute: '2-digit',
+    hour12: false,
+  })
+  return `${name} · ${when}`
+}
+
+export function BetweenRacesView({
+  context,
+  now,
+  view,
+  championship,
+  briefing,
+}: {
+  context: WeekendContext
+  now: Date
+  view: WeekendViewState
+  championship?: WeekendChampionshipImpact
+  briefing: WeekendBriefingItem[]
+}) {
+  const eyebrow = EYEBROW[view] ?? 'Between races'
+
+  const previous = context.previous_completed_session
+  const previousMeeting = meetingIdentity(previous?.meeting ?? context.previous_meeting)
+  const nextMeeting = meetingIdentity(context.next_meeting)
+  const nextSession = context.next_session?.session
+  const analysisKey = analysisSessionKey(context)
+
+  return (
+    <div className="wk-between" data-testid="weekend-between-races" data-state={view}>
+      <div className="wk-eyebrow mono" data-testid="wk-eyebrow">{eyebrow}</div>
+
+      <div className="wk-top-grid">
+        {previousMeeting && (
+          <section className="wk-event-card wk-event-last" data-testid="wk-last-event">
+            <header className="wk-event-head">
+              <div className="wk-event-id">
+                <Flag code={previousMeeting.country_code} flag={previousMeeting.country_flag} />
+                <h2 className="wk-event-name">{previousMeeting.meeting_name}</h2>
+              </div>
+              <span className="wk-event-tag wk-tag-done mono">
+                <FlagIcon size={13} aria-hidden="true" /> Completed
+              </span>
+            </header>
+            <div className="wk-event-body">
+              <EventPodium sessionKey={analysisKey} />
+              <div className="wk-story-card">
+                <span className="wk-story-label">What decided it?</span>
+                {analysisKey ? (
+                  <Link
+                    to="/race-hub"
+                    search={{ session_key: analysisKey }}
+                    className="wk-cta wk-cta-primary"
+                    data-testid="wk-explore-race-story"
+                  >
+                    Explore Race Story <ChevronRight size={15} aria-hidden="true" />
+                  </Link>
+                ) : (
+                  <p className="wk-story-text" data-testid="wk-no-analysis">
+                    Analysis for this session is not available locally yet.
+                  </p>
+                )}
+              </div>
+            </div>
+          </section>
+        )}
+
+        {nextMeeting ? (
+          <section className="wk-event-card wk-event-next" data-testid="wk-next-event">
+            <header className="wk-event-head">
+              <div className="wk-event-id">
+                <Flag code={nextMeeting.country_code} flag={nextMeeting.country_flag} />
+                <h2 className="wk-event-name">{nextMeeting.meeting_name}</h2>
+              </div>
+              <span className="wk-event-tag wk-tag-next mono">Next event</span>
+            </header>
+            <div className="wk-next-body">
+              <CountdownDisplay target={nextSession?.date_start ?? nextMeeting.date_start} now={now} />
+              <div className="wk-next-session">
+                <span className="wk-next-label mono">Next session</span>
+                <span className="wk-next-value">
+                  {formatSessionLine(nextSession?.session_name, nextSession?.date_start)}
+                </span>
+              </div>
+              <Link to="/preview" className="wk-cta wk-cta-primary wk-cta-wide" data-testid="wk-prepare">
+                Prepare for {nextMeeting.short_name}
+                <ChevronRight size={15} aria-hidden="true" />
+              </Link>
+            </div>
+          </section>
+        ) : (
+          <section className="wk-event-card wk-event-next" data-testid="wk-season-complete-card">
+            <header className="wk-event-head">
+              <h2 className="wk-event-name">That&apos;s a wrap</h2>
+              <span className="wk-event-tag wk-tag-next mono">Off-season</span>
+            </header>
+            <div className="wk-next-body">
+              <p className="wk-season-complete-copy">
+                The {context.season} calendar is complete. Explore the season&apos;s races or revisit the championship
+                battle while the next schedule is confirmed.
+              </p>
+              <Link to="/explore" className="wk-cta wk-cta-primary wk-cta-wide" data-testid="wk-season-complete-explore">
+                Explore the season <ChevronRight size={15} aria-hidden="true" />
+              </Link>
+            </div>
+          </section>
+        )}
+      </div>
+
+      <div className="wk-mid-grid">
+        {championship && <ChampionshipImpactCard impact={championship} />}
+        <ChampionshipRoundStrip
+          round={context.championship_round}
+          total={context.total_championship_rounds}
+        />
+      </div>
+
+      {briefing.length > 0 && <BriefingStrip items={briefing} />}
+    </div>
+  )
+}

frontend/src/components/weekend/BetweenSessionsView.tsx

@@ -0,0 +1,86 @@
+import { Link } from '@tanstack/react-router'
+import { ChevronRight } from 'lucide-react'
+import type { WeekendBriefingItem, WeekendContext, WeekendViewState } from '../../types'
+import { BriefingStrip, CountdownDisplay, EventPodium, SessionRail, railNodes } from './shared'
+import { analysisSessionKey, meetingIdentity } from '../../lib/weekendContext'
+import { parseScheduleTime } from '../../lib/schedule'
+
+function nextSessionWhen(start: string | undefined): string {
+  const date = start ? parseScheduleTime(start) : null
+  if (!date) return 'Time to be confirmed'
+  return date.toLocaleString('en-GB', {
+    weekday: 'short',
+    hour: '2-digit',
+    minute: '2-digit',
+    hour12: false,
+  })
+}
+
+export function BetweenSessionsView({
+  context,
+  now,
+  view,
+  briefing,
+}: {
+  context: WeekendContext
+  now: Date
+  view: WeekendViewState
+  briefing: WeekendBriefingItem[]
+}) {
+  const settling = view === 'session_settling'
+  const focus = meetingIdentity(context.focus_meeting)
+  const previous = context.previous_completed_session
+  const previousName = previous?.session.session_name ?? 'Last session'
+  const next = context.next_session?.session
+  // Settling recap must open the just-finished session, not an older default.
+  const previousKey = previous?.session.session_key
+  const analysisKey =
+    settling && previousKey && previousKey > 0 ? previousKey : analysisSessionKey(context)
+  const nodes = railNodes(previous, context.active_session, context.next_session)
+
+  return (
+    <div className="wk-sessions" data-testid="weekend-between-sessions" data-state={view}>
+      <div className="wk-eyebrow mono" data-testid="wk-eyebrow">
+        {settling ? 'Session settling' : 'Between sessions'}
+      </div>
+
+      <header className="wk-sessions-head">
+        <h1 className="wk-sessions-title">{focus?.meeting_name ?? 'Race weekend'}</h1>
+        {focus?.circuit_short_name && <p className="wk-sessions-circuit mono">{focus.circuit_short_name}</p>}
+      </header>
+
+      <SessionRail nodes={nodes} />
+
+      {previous && (
+        <section className="wk-recap-card" data-testid="wk-last-session">
+          <span className="wk-recap-eyebrow mono">
+            {previousName} · {settling ? 'Settling' : 'Complete'}
+          </span>
+          <h2 className="wk-recap-title">What happened in {previousName}</h2>
+          <EventPodium sessionKey={analysisKey} />
+        </section>
+      )}
+
+      {next && (
+        <section className="wk-upnext-card" data-testid="wk-next-session">
+          <span className="wk-upnext-eyebrow mono">Up next</span>
+          <h2 className="wk-upnext-title">{next.session_name}</h2>
+          <CountdownDisplay target={next.date_start} now={now} compact />
+          <p className="wk-upnext-when mono">{nextSessionWhen(next.date_start)}</p>
+          {analysisKey && (
+            <Link
+              to="/race-hub"
+              search={{ session_key: analysisKey }}
+              className="wk-cta wk-cta-primary wk-cta-wide"
+              data-testid="wk-view-recap"
+            >
+              View {previousName} recap <ChevronRight size={15} aria-hidden="true" />
+            </Link>
+          )}
+        </section>
+      )}
+
+      {briefing.length > 0 && <BriefingStrip items={briefing} />}
+    </div>
+  )
+}

frontend/src/components/weekend/LiveHandoffView.tsx

@@ -0,0 +1,47 @@
+import { Link } from '@tanstack/react-router'
+import { ChevronRight, Radio } from 'lucide-react'
+import type { WeekendContext } from '../../types'
+import { EventPodium, Flag, SessionRail, railNodes } from './shared'
+import { analysisSessionKey, meetingIdentity } from '../../lib/weekendContext'
+
+export function LiveHandoffView({ context }: { context: WeekendContext }) {
+  const focus = meetingIdentity(context.focus_meeting ?? context.active_session?.meeting)
+  const active = context.active_session?.session
+  const previous = context.previous_completed_session
+  const previousName = previous?.session.session_name ?? 'Last session'
+  const analysisKey = analysisSessionKey(context)
+  const nodes = railNodes(previous, context.active_session, context.next_session)
+
+  return (
+    <div className="wk-live" data-testid="weekend-live" data-state="session_live">
+      <div className="wk-eyebrow mono" data-testid="wk-eyebrow">Session live</div>
+
+      <section className="wk-live-card" data-testid="wk-live-card">
+        <div className="wk-live-head">
+          <div className="wk-event-id">
+            <Flag code={focus?.country_code} flag={focus?.country_flag} />
+            <h1 className="wk-sessions-title">{focus?.meeting_name ?? 'Live session'}</h1>
+          </div>
+          <span className="wk-live-pulse" aria-hidden="true" />
+        </div>
+        {focus?.circuit_short_name && <p className="wk-sessions-circuit mono">{focus.circuit_short_name}</p>}
+        <p className="wk-live-lead">
+          {active?.session_name ? `${active.session_name} is on track now.` : 'A session is running now.'}
+        </p>
+        <Link to="/live" className="wk-cta wk-cta-primary wk-cta-wide" data-testid="wk-watch-live">
+          <Radio size={15} aria-hidden="true" /> Watch live timing <ChevronRight size={15} aria-hidden="true" />
+        </Link>
+      </section>
+
+      <SessionRail nodes={nodes} />
+
+      {previous && (
+        <section className="wk-recap-card" data-testid="wk-last-session">
+          <span className="wk-recap-eyebrow mono">{previousName} · Complete</span>
+          <h2 className="wk-recap-title">What happened in {previousName}</h2>
+          <EventPodium sessionKey={analysisKey} />
+        </section>
+      )}
+    </div>
+  )
+}

frontend/src/components/weekend/PreSessionView.tsx

@@ -0,0 +1,75 @@
+import { Link } from '@tanstack/react-router'
+import { ChevronRight } from 'lucide-react'
+import type { WeekendContext } from '../../types'
+import { RacePreviewPage } from '../../pages/RacePreviewPage'
+import { ChampionshipRoundStrip, CountdownDisplay, Flag, SessionRail, railNodes } from './shared'
+import { meetingIdentity } from '../../lib/weekendContext'
+import type { DataAvailability } from '../../lib/availability'
+
+/**
+ * PreSessionView folds the race preview surface into the Weekend home so there is
+ * no separate Preview destination. It reuses the existing preview page content and
+ * frames it with the next-session countdown and compact season navigation. It also
+ * backs the /preview alias, so saved preview links resolve here instead of looping.
+ *
+ * Canonical meeting/session identity is passed into Preview so the nested surface
+ * cannot independently re-resolve a different current weekend.
+ */
+export function PreSessionView({
+  context,
+  now,
+  shellAvailability = null,
+}: {
+  context: WeekendContext
+  now: Date
+  /** Weekend shell notice already shown — Preview dedupes only an equivalent kind. */
+  shellAvailability?: DataAvailability | null
+}) {
+  const meeting = context.next_meeting ?? context.focus_meeting
+  const identity = meetingIdentity(meeting)
+  const next = context.next_session?.session
+  const nextStart = next?.date_start ?? meeting?.date_start
+  const nodes = railNodes(
+    context.previous_completed_session,
+    context.active_session,
+    context.next_session,
+  )
+
+  return (
+    <div className="wk-pre" data-testid="weekend-pre-session" data-state="pre_session">
+      <div className="wk-eyebrow mono" data-testid="wk-eyebrow">Pre-session</div>
+
+      {identity && (
+        <header className="wk-pre-head" data-testid="wk-pre-head">
+          <div className="wk-event-id">
+            <Flag code={identity.country_code} flag={identity.country_flag} />
+            <h1 className="wk-sessions-title">{identity.meeting_name}</h1>
+          </div>
+          <div className="wk-pre-countdown">
+            <span className="wk-next-label mono">{next?.session_name ?? 'Next session'}</span>
+            <CountdownDisplay target={nextStart} now={now} />
+          </div>
+          <Link to="/live" className="wk-cta wk-cta-ghost" data-testid="wk-pre-live">
+            Live timing <ChevronRight size={14} aria-hidden="true" />
+          </Link>
+        </header>
+      )}
+
+      {nodes.length > 0 && <SessionRail nodes={nodes} />}
+
+      <div className="wk-pre-preview" data-testid="wk-pre-preview">
+        <RacePreviewPage
+          embedded
+          meeting={meeting}
+          season={context.season ?? meeting?.year}
+          shellAvailability={shellAvailability}
+        />
+      </div>
+
+      <ChampionshipRoundStrip
+        round={context.championship_round}
+        total={context.total_championship_rounds}
+      />
+    </div>
+  )
+}

frontend/src/components/weekend/StatusViews.tsx

@@ -0,0 +1,65 @@
+import { Link } from '@tanstack/react-router'
+import { userFacingError } from '../../lib/fetch'
+
+export function WeekendLoading() {
+  return (
+    <div className="wk-status wk-status-loading" data-testid="weekend-loading" aria-busy="true">
+      <span className="wk-status-eyebrow mono">box-box · weekend</span>
+      <p className="wk-status-title">Reading the weekend…</p>
+    </div>
+  )
+}
+
+export function WeekendError({
+  error,
+  message,
+  onRetry,
+  retrying = false,
+}: {
+  error?: unknown
+  message?: string
+  onRetry?: () => void
+  retrying?: boolean
+}) {
+  const resolved =
+    message ??
+    (error != null ? userFacingError(error) : 'Something went wrong loading the weekend context.')
+
+  return (
+    <div className="wk-status wk-status-error" data-testid="weekend-error" role="alert">
+      <span className="wk-status-eyebrow mono">box-box · weekend</span>
+      <p className="wk-status-title">Weekend unavailable</p>
+      <p className="wk-status-sub">{resolved}</p>
+      {typeof onRetry === 'function' && (
+        <div className="wk-status-actions">
+          <button
+            type="button"
+            className="wk-cta wk-cta-primary"
+            onClick={onRetry}
+            disabled={retrying}
+            aria-busy={retrying || undefined}
+            data-testid="weekend-retry"
+          >
+            {retrying ? 'Retrying…' : 'Retry'}
+          </button>
+        </div>
+      )}
+    </div>
+  )
+}
+
+export function WeekendLimited({ message, season }: { message?: string; season?: number }) {
+  return (
+    <div className="wk-status wk-status-limited" data-testid="weekend-limited">
+      <span className="wk-status-eyebrow mono">box-box · weekend</span>
+      <p className="wk-status-title">Nothing to show yet</p>
+      <p className="wk-status-sub">
+        {message ?? `No weekend data for the ${season || 'current'} season is available right now.`}
+      </p>
+      <div className="wk-status-actions">
+        <Link to="/live" className="wk-cta wk-cta-ghost">Live timing</Link>
+        <Link to="/explore" className="wk-cta wk-cta-ghost">Explore</Link>
+      </div>
+    </div>
+  )
+}

frontend/src/components/weekend/WeekendFocusBanner.tsx

@@ -0,0 +1,65 @@
+import { Link } from '@tanstack/react-router'
+import { useQuery } from '@tanstack/react-query'
+import { ChevronRight } from 'lucide-react'
+import { fetchWeekend } from '../../api'
+import { meetingIdentity } from '../../lib/weekendContext'
+
+/**
+ * Restores Race Hub → Weekend meeting/session context from the URL search
+ * contract. Deep-linkable and reload-safe — no hidden component memory.
+ */
+export function WeekendFocusBanner({
+  meetingKey,
+  sessionKey,
+}: {
+  meetingKey?: number
+  sessionKey?: number
+}) {
+  const hasFocus = (meetingKey != null && meetingKey > 0) || (sessionKey != null && sessionKey > 0)
+  const weekendQuery = useQuery({
+    queryKey: ['weekend', meetingKey],
+    queryFn: () => fetchWeekend(meetingKey!),
+    enabled: meetingKey != null && meetingKey > 0,
+    staleTime: 60_000,
+  })
+
+  if (!hasFocus) return null
+
+  const weekend = weekendQuery.data
+  const meeting = meetingIdentity(weekend?.meeting)
+  const session = weekend?.sessions.find((s) => s.session.session_key === sessionKey)?.session
+  const meetingLabel = meeting?.meeting_name ?? (meetingKey ? `Meeting ${meetingKey}` : 'Selected weekend')
+  const sessionLabel = session?.session_name ?? (sessionKey ? `Session ${sessionKey}` : null)
+
+  return (
+    <section
+      className="wk-focus"
+      data-testid="wk-focus-context"
+      data-meeting-key={meetingKey ?? undefined}
+      data-session-key={sessionKey ?? undefined}
+      aria-label="Selected weekend context"
+    >
+      <div className="wk-focus-copy">
+        <span className="wk-focus-eyebrow mono">From Race Hub</span>
+        <h2 className="wk-focus-title" data-testid="wk-focus-meeting">
+          {meetingLabel}
+        </h2>
+        {sessionLabel && (
+          <p className="wk-focus-session" data-testid="wk-focus-session">
+            Selected session · {sessionLabel}
+          </p>
+        )}
+      </div>
+      {sessionKey != null && sessionKey > 0 && (
+        <Link
+          to="/race-hub"
+          search={{ session_key: sessionKey }}
+          className="wk-cta wk-cta-primary wk-focus-cta"
+          data-testid="wk-return-analysis"
+        >
+          Continue analysis <ChevronRight size={15} aria-hidden="true" />
+        </Link>
+      )}
+    </section>
+  )
+}

frontend/src/components/weekend/shared.tsx

@@ -0,0 +1,277 @@
+import { useQuery } from '@tanstack/react-query'
+import { Link } from '@tanstack/react-router'
+import { fetchRaceHub } from '../../api'
+import { countryFlag } from '../../lib/gpIdentity'
+import { parseScheduleTime } from '../../lib/schedule'
+import { podiumFromResults } from '../../lib/weekendContext'
+import { teamColor } from '../../utils'
+import type {
+  ContextSession,
+  WeekendChampionshipImpact,
+  WeekendBriefingItem,
+  WeekendPodiumEntry,
+} from '../../types'
+
+export function Flag({ code, flag }: { code?: string; flag?: string }) {
+  const glyph = countryFlag({ country_code: code ?? '', country_flag: flag ?? '' })
+  if (!glyph) return null
+  return <span className="wk-flag" aria-hidden="true">{glyph}</span>
+}
+
+interface CountdownParts {
+  days: number
+  hours: number
+  minutes: number
+  seconds: number
+  reached: boolean
+}
+
+export function countdownParts(target: string | undefined, now: Date): CountdownParts | null {
+  const date = target ? parseScheduleTime(target) : null
+  if (!date) return null
+  const diff = date.getTime() - now.getTime()
+  const clamped = Math.max(0, diff)
+  const totalSeconds = Math.floor(clamped / 1000)
+  return {
+    days: Math.floor(totalSeconds / 86400),
+    hours: Math.floor((totalSeconds % 86400) / 3600),
+    minutes: Math.floor((totalSeconds % 3600) / 60),
+    seconds: totalSeconds % 60,
+    reached: diff <= 0,
+  }
+}
+
+export function CountdownDisplay({
+  target,
+  now,
+  compact,
+}: {
+  target: string | undefined
+  now: Date
+  compact?: boolean
+}) {
+  const parts = countdownParts(target, now)
+  if (!parts) {
+    return (
+      <span className="wk-countdown-tbc mono" data-testid="wk-countdown">
+        Schedule TBC
+      </span>
+    )
+  }
+  if (parts.reached) {
+    return <span className="wk-countdown-live" data-testid="wk-countdown">Starting now</span>
+  }
+  if (compact || parts.days === 0) {
+    const hh = String(parts.days * 24 + parts.hours).padStart(2, '0')
+    return (
+      <span className="wk-countdown-clock mono" data-testid="wk-countdown">
+        {hh}:{String(parts.minutes).padStart(2, '0')}:{String(parts.seconds).padStart(2, '0')}
+      </span>
+    )
+  }
+  return (
+    <span className="wk-countdown" data-testid="wk-countdown">
+      <span className="wk-count-unit"><b>{parts.days}</b>D</span>
+      <span className="wk-count-unit"><b>{String(parts.hours).padStart(2, '0')}</b>H</span>
+      <span className="wk-count-unit"><b>{String(parts.minutes).padStart(2, '0')}</b>M</span>
+    </span>
+  )
+}
+
+/**
+ * EventPodium fetches and renders the podium for a completed analysis session.
+ * When no analysable session key is available (e.g. an archived result with no
+ * local analysis), it renders an explicit empty state rather than fetching.
+ */
+export function EventPodium({ sessionKey }: { sessionKey?: number }) {
+  const enabled = typeof sessionKey === 'number' && sessionKey > 0
+  const query = useQuery({
+    queryKey: ['race-hub', sessionKey, 'podium'],
+    queryFn: () => fetchRaceHub(sessionKey as number),
+    enabled,
+    staleTime: 60_000,
+  })
+
+  const podium: WeekendPodiumEntry[] = podiumFromResults(query.data?.results ?? [])
+
+  if (!enabled) {
+    return (
+      <div className="wk-podium-empty" data-testid="wk-podium-empty">
+        Result not available yet.
+      </div>
+    )
+  }
+
+  if (podium.length === 0) {
+    return (
+      <div className="wk-podium-empty" data-testid="wk-podium-empty">
+        {query.isLoading ? 'Loading result…' : 'Result not available yet.'}
+      </div>
+    )
+  }
+
+  return (
+    <ol className="wk-podium" data-testid="wk-podium">
+      {podium.map((p) => (
+        <li key={p.driver_number} className="wk-podium-row" style={{ ['--wk-team' as string]: teamColor(p.team_colour) }}>
+          <span className="wk-podium-pos mono">{p.position}</span>
+          <span className="wk-podium-code">{p.name_acronym}</span>
+          <span className="wk-podium-gap mono">{p.gap}</span>
+        </li>
+      ))}
+    </ol>
+  )
+}
+
+export function ChampionshipImpactCard({ impact }: { impact: WeekendChampionshipImpact }) {
+  const leader = impact.leaders[0]
+  return (
+    <section className="wk-champ" data-testid="wk-champ-impact">
+      <header className="wk-card-head">
+        <span className="wk-card-title">Championship impact</span>
+        <Link to="/championship" className="wk-card-link">Standings →</Link>
+      </header>
+      <ol className="wk-champ-list">
+        {impact.leaders.map((d) => {
+          const gap = leader && d.position !== 1 ? leader.points - d.points : 0
+          return (
+            <li key={d.driver_number} className="wk-champ-row" style={{ ['--wk-team' as string]: teamColor(d.team_colour) }}>
+              <span className="wk-champ-pos mono">{d.position}</span>
+              <span className="wk-champ-code">{d.name_acronym}</span>
+              <span className="wk-champ-pts mono">{d.points}</span>
+              <span className="wk-champ-gap mono">{d.position === 1 ? '—' : `-${gap}`}</span>
+            </li>
+          )
+        })}
+      </ol>
+      {impact.note && <p className="wk-champ-note">{impact.note}</p>}
+    </section>
+  )
+}
+
+export function BriefingStrip({ items }: { items: WeekendBriefingItem[] }) {
+  if (items.length === 0) return null
+  return (
+    <section className="wk-briefing" data-testid="wk-briefing">
+      <header className="wk-card-head">
+        <span className="wk-card-title">Since the chequered flag</span>
+        <Link to="/briefing" className="wk-card-link">All briefing →</Link>
+      </header>
+      <ul className="wk-briefing-list">
+        {items.map((item) => (
+          <li key={item.url} className="wk-briefing-item">
+            <a href={item.url} target="_blank" rel="noreferrer" className="wk-briefing-link">
+              {item.category && <span className="wk-briefing-cat mono">{item.category}</span>}
+              <span className="wk-briefing-title">{item.title}</span>
+              <span className="wk-briefing-source mono">{item.source}</span>
+            </a>
+          </li>
+        ))}
+      </ul>
+    </section>
+  )
+}
+
+/**
+ * ChampionshipRoundStrip is a compact, progressively-disclosed round indicator.
+ * The canonical contract exposes only the current round and total, so the strip
+ * shows "Round N of M" and links out to Explore for the full calendar rather than
+ * reintroducing the whole calendar on the Weekend home.
+ */
+export function ChampionshipRoundStrip({ round, total }: { round: number; total: number }) {
+  if (round <= 0 || total <= 0) return null
+  const pct = Math.min(100, Math.round((round / total) * 100))
+  return (
+    <section className="wk-season-nav" data-testid="wk-season-nav" aria-label="Season progress">
+      <div className="wk-season-progress">
+        <div className="wk-season-progress-head">
+          <span className="wk-card-title">Season progress</span>
+          <Link to="/explore" className="wk-card-link" data-testid="wk-season-explore">
+            Full calendar →
+          </Link>
+        </div>
+        <div
+          className="wk-season-bar"
+          role="progressbar"
+          aria-valuenow={round}
+          aria-valuemin={1}
+          aria-valuemax={total}
+          aria-label={`Round ${round} of ${total}`}
+        >
+          <span className="wk-season-bar-fill" style={{ width: `${pct}%` }} aria-hidden="true" />
+        </div>
+        <p className="wk-season-progress-label mono">
+          Round {round} of {total}
+        </p>
+      </div>
+    </section>
+  )
+}
+
+interface TimelineNode {
+  key: string
+  session_name: string
+  status: 'done' | 'live' | 'next'
+}
+
+/**
+ * SessionRail renders the previous/active/next sessions the canonical context
+ * exposes as a compact three-node rail. It is intentionally derived only from the
+ * canonical refs — the contract does not enumerate a full weekend session list.
+ */
+export function SessionRail({ nodes }: { nodes: TimelineNode[] }) {
+  if (nodes.length === 0) return null
+  return (
+    <ol className="wk-timeline" data-testid="wk-timeline" role="list">
+      {nodes.map((n) => (
+        <li key={n.key} className={`wk-timeline-node wk-timeline-${n.status}`} role="listitem">
+          <span className="wk-timeline-dot" aria-hidden="true" />
+          <span className="wk-timeline-name">{shortSessionName(n.session_name)}</span>
+          <span className="wk-timeline-state mono">{stateLabel(n.status)}</span>
+        </li>
+      ))}
+    </ol>
+  )
+}
+
+/** Build the compact session rail from the canonical previous/active/next refs. */
+export function railNodes(
+  previous: ContextSession | undefined,
+  active: ContextSession | undefined,
+  next: ContextSession | undefined,
+): TimelineNode[] {
+  const nodes: TimelineNode[] = []
+  if (previous?.session.session_name) {
+    nodes.push({ key: `prev-${previous.session.session_key}`, session_name: previous.session.session_name, status: 'done' })
+  }
+  if (active?.session.session_name) {
+    nodes.push({ key: `live-${active.session.session_key}`, session_name: active.session.session_name, status: 'live' })
+  }
+  if (next?.session.session_name) {
+    nodes.push({ key: `next-${next.session.session_key}`, session_name: next.session.session_name, status: 'next' })
+  }
+  return nodes
+}
+
+function shortSessionName(name: string): string {
+  const map: Record<string, string> = {
+    'Practice 1': 'FP1',
+    'Practice 2': 'FP2',
+    'Practice 3': 'FP3',
+    Qualifying: 'Quali',
+    'Sprint Qualifying': 'SQ',
+    'Sprint Shootout': 'SQ',
+  }
+  return map[name] ?? name
+}
+
+function stateLabel(status: TimelineNode['status']): string {
+  switch (status) {
+    case 'done':
+      return 'Complete'
+    case 'live':
+      return 'Live'
+    default:
+      return 'Next'
+  }
+}

frontend/src/hooks/useWeekendContext.ts

@@ -0,0 +1,140 @@
+import { useEffect, useMemo, useState } from 'react'
+import { useQuery } from '@tanstack/react-query'
+import { fetchChampionshipHub, fetchNews, fetchWeekendContext } from '../api'
+import { weekendContextNotice, type DataAvailability } from '../lib/availability'
+import { championshipImpact, briefingItems } from '../lib/weekendContext'
+import type {
+  WeekendChampionshipImpact,
+  WeekendBriefingItem,
+  WeekendContext,
+} from '../types'
+
+export type WeekendLoadState = 'loading' | 'error' | 'ready'
+
+export interface UseWeekendContextResult {
+  /** Canonical context, present only when loadState === 'ready'. */
+  context: WeekendContext | null
+  loadState: WeekendLoadState
+  error?: Error
+  /** Supplementary championship movers (not part of the #72 contract). */
+  championship?: WeekendChampionshipImpact
+  /** Supplementary briefing items (not part of the #72 contract). */
+  briefing: WeekendBriefingItem[]
+  /** Non-blocking availability notice from reported context freshness/headers. */
+  availabilityNotice: DataAvailability | null
+  /** True when championship or news supplements failed while context succeeded. */
+  supplementsLimited: boolean
+  now: Date
+  /** Refetch canonical context and/or failed supplements as appropriate. */
+  refetch: () => void
+  /** True while a relevant refetch is in flight. */
+  isFetching: boolean
+}
+
+/**
+ * useWeekendContext reads the canonical /api/v1/weekend-context endpoint as the
+ * single source of truth for the Weekend home. When the canonical read succeeds
+ * it layers on two pieces of supplementary data that the contract intentionally
+ * omits — championship movers and the paddock briefing — and nothing else.
+ *
+ * It deliberately does NOT fan out to season / meetings / per-weekend / OpenF1
+ * session / live-state queries: those would defeat the local-first canonical read
+ * model and can hit the rate-limited OpenF1 REST surface during active sessions.
+ * Supplementary queries are gated on a successful canonical read so a failing or
+ * pending endpoint issues no extra requests.
+ */
+export function useWeekendContext(): UseWeekendContextResult {
+  const [now, setNow] = useState(() => Date.now())
+  useEffect(() => {
+    const timer = window.setInterval(() => setNow(Date.now()), 1000)
+    return () => window.clearInterval(timer)
+  }, [])
+  const nowDate = useMemo(() => new Date(now), [now])
+
+  const contextQuery = useQuery({
+    queryKey: ['weekend-context'],
+    queryFn: ({ signal }) => fetchWeekendContext(signal),
+    staleTime: 30_000,
+  })
+
+  const canonical = contextQuery.data ?? null
+  const canonicalReady = canonical != null
+  const season = canonical?.season
+
+  // Supplementary data — only fetched once the canonical context has resolved,
+  // so a pending/failed canonical read never triggers a request fan-out.
+  const championshipQuery = useQuery({
+    queryKey: ['championship-hub', season ?? 'current'],
+    queryFn: ({ signal }) => fetchChampionshipHub(season, signal),
+    enabled: canonicalReady,
+    staleTime: 60_000,
+  })
+
+  const newsQuery = useQuery({
+    queryKey: ['news', 6],
+    queryFn: ({ signal }) => fetchNews(6, undefined, signal),
+    enabled: canonicalReady,
+    staleTime: 60_000,
+  })
+
+  const championship = useMemo(
+    () => championshipImpact(championshipQuery.data),
+    [championshipQuery.data],
+  )
+  const briefing = useMemo(() => briefingItems(newsQuery.data ?? []), [newsQuery.data])
+
+  const availabilityNotice = useMemo(
+    () => (canonical ? weekendContextNotice(canonical) : null),
+    [canonical],
+  )
+
+  // Keep Limited visible while a failed supplement is refetching so Retry can
+  // expose disabled/aria-busy. React Query v5 clears isError during that refetch.
+  const supplementDegraded = (q: {
+    isError: boolean
+    isFetching: boolean
+    isFetched: boolean
+    data: unknown
+  }) => q.isError || (q.isFetching && q.isFetched && q.data == null)
+
+  const supplementsLimited =
+    canonicalReady &&
+    (supplementDegraded(championshipQuery) || supplementDegraded(newsQuery))
+
+  let loadState: WeekendLoadState = 'loading'
+  if (contextQuery.isError) loadState = 'error'
+  else if (canonicalReady) loadState = 'ready'
+
+  const refetch = () => {
+    if (!canonicalReady) {
+      if (!contextQuery.isFetching) void contextQuery.refetch()
+      return
+    }
+    // Freshness notice Retry refreshes the canonical context.
+    if (availabilityNotice && !contextQuery.isFetching) {
+      void contextQuery.refetch()
+    }
+    // Limited Retry must hit the failed supplements — not merely context.
+    // Gate on degraded (error or in-flight post-error refetch), not isError alone.
+    if (championshipQuery.isError && !championshipQuery.isFetching) {
+      void championshipQuery.refetch()
+    }
+    if (newsQuery.isError && !newsQuery.isFetching) {
+      void newsQuery.refetch()
+    }
+  }
+
+  return {
+    context: canonical,
+    loadState,
+    error: contextQuery.error instanceof Error ? contextQuery.error : undefined,
+    championship,
+    briefing,
+    availabilityNotice,
+    supplementsLimited,
+    now: nowDate,
+    refetch,
+    isFetching:
+      contextQuery.isFetching || championshipQuery.isFetching || newsQuery.isFetching,
+  }
+}

frontend/src/lib/availability.ts

@@ -0,0 +1,135 @@
+import { getResponseAvailability, type ResponseAvailability } from './fetch'
+import type { ContextSession, WeekendContext } from '../types'
+
+/** Shared Weekend Context terminology for coverage / availability indicators. */
+export type DataAvailability = 'local' | 'partial' | 'stale' | 'archive' | 'limited' | 'missing'
+
+/** Freshness values that warrant a non-blocking DataNotice. */
+const NOTICE_FRESHNESS = new Set<string>(['stale', 'partial', 'local', 'limited', 'archive'])
+
+/**
+ * Product-impact severity for aggregating conflicting reported freshness.
+ * Higher wins so routine Local cannot mask Limited/Partial/Stale/Archive.
+ */
+const NOTICE_SEVERITY: Record<DataAvailability, number> = {
+  local: 1,
+  archive: 2,
+  stale: 3,
+  partial: 4,
+  limited: 5,
+  missing: 6,
+}
+
+/**
+ * Map a reported freshness string onto shared DataNotice vocabulary.
+ * Returns null for unreported / routine-success values (`fresh`, `live`, …).
+ * Never invents stale from React Query staleTime.
+ */
+export function noticeFromFreshness(
+  freshness: string | undefined | null,
+  opts?: { includeLocal?: boolean },
+): DataAvailability | null {
+  if (!freshness) return null
+  const includeLocal = opts?.includeLocal ?? true
+  if (freshness === 'local' && !includeLocal) return null
+  if (!NOTICE_FRESHNESS.has(freshness)) return null
+  return freshness as DataAvailability
+}
+
+/** Prefer header freshness, then optional typed payload freshness. */
+export function noticeFromResponse(
+  data: unknown,
+  opts?: { includeLocal?: boolean; fallbackFreshness?: string },
+): DataAvailability | null {
+  const meta = getResponseAvailability(data)
+  return (
+    noticeFromFreshness(meta?.freshness, opts) ??
+    noticeFromFreshness(opts?.fallbackFreshness, opts)
+  )
+}
+
+/**
+ * Pick the worst (highest product-impact) reported notice among sources.
+ * Equivalent kinds collapse to one; Local never masks a stronger disclosure.
+ */
+export function aggregateNotices(
+  notices: Array<DataAvailability | null | undefined>,
+): DataAvailability | null {
+  let worst: DataAvailability | null = null
+  for (const notice of notices) {
+    if (!notice) continue
+    if (!worst || NOTICE_SEVERITY[notice] > NOTICE_SEVERITY[worst]) {
+      worst = notice
+    }
+  }
+  return worst
+}
+
+export function noticeMessage(kind: DataAvailability): string {
+  switch (kind) {
+    case 'stale':
+      return 'Showing stale cached data. Retry to refresh.'
+    case 'partial':
+      return 'Coverage is partial for this view.'
+    case 'local':
+      return 'Showing local season data.'
+    case 'limited':
+      return 'Some optional details are unavailable. Core data is still shown.'
+    case 'archive':
+      return 'Showing an archived snapshot.'
+    case 'missing':
+      return 'Some expected data is missing.'
+  }
+}
+
+/**
+ * Session whose state the Weekend shell is presenting — mirrors backend
+ * focusedContextSession so an older terminal session never overrides focus.
+ */
+export function focusedContextSession(context: WeekendContext): ContextSession | undefined {
+  if (context.active_session) return context.active_session
+  if (!context.focus_meeting) return undefined
+  const focusKey = context.focus_meeting.meeting_key
+  for (const ref of [
+    context.next_session,
+    context.previous_completed_session,
+    context.default_analysis_session,
+  ]) {
+    if (ref?.meeting?.meeting_key === focusKey) return ref
+    // Session.meeting_key is always present even when meeting identity is sparse.
+    if (ref && ref.session.meeting_key === focusKey) return ref
+  }
+  return undefined
+}
+
+/**
+ * Weekend shell notice from authoritative response headers when present.
+ * A header that intentionally maps to no notice (e.g. focused local/local with
+ * Local suppressed) must not fall through to older previous-session archive/partial.
+ * When headers are absent, typed focus-session freshness may be used.
+ */
+export function weekendContextNotice(
+  context: WeekendContext,
+  responseMeta?: ResponseAvailability,
+): DataAvailability | null {
+  const headerMeta = responseMeta ?? getResponseAvailability(context)
+  if (headerMeta) {
+    return noticeFromFreshness(headerMeta.freshness, { includeLocal: false })
+  }
+
+  const focus = focusedContextSession(context)
+  return noticeFromFreshness(focus?.availability.freshness, { includeLocal: false })
+}
+
+/**
+ * Embedded Preview should disclose its own freshness unless the Weekend shell
+ * already shows an equivalent notice (same DataAvailability kind).
+ */
+export function shouldShowEmbeddedNotice(
+  notice: DataAvailability | null | undefined,
+  shellNotice: DataAvailability | null | undefined,
+): boolean {
+  if (!notice) return false
+  if (!shellNotice) return true
+  return notice !== shellNotice
+}

frontend/src/lib/fetch.ts

@@ -0,0 +1,353 @@
+/** Bounded fetch helpers for primary-route resilience. */
+
+import { replaceEqualDeep } from '@tanstack/react-query'
+
+export const DEFAULT_FETCH_TIMEOUT_MS = 15_000
+
+/** CORS-readable success provenance headers from the Go API. */
+export const DATA_SOURCE_HEADER = 'X-BoxBox-Data-Source'
+export const DATA_FRESHNESS_HEADER = 'X-BoxBox-Data-Freshness'
+
+/** Reported response source values (`openf1|local|mixed`, plus `fia` for live). */
+export type DataSourceHeader = 'openf1' | 'local' | 'mixed' | 'fia' | string
+
+/** Reported freshness (`fresh|stale|local|partial`, plus live/archive/limited). */
+export type DataFreshnessHeader =
+  | 'fresh'
+  | 'stale'
+  | 'local'
+  | 'partial'
+  | 'live'
+  | 'archive'
+  | 'limited'
+  | string
+
+/** Additive success-response availability metadata (never inferred from React Query). */
+export interface ResponseAvailability {
+  source?: DataSourceHeader
+  freshness?: DataFreshnessHeader
+}
+
+const responseAvailability = new WeakMap<object, ResponseAvailability>()
+
+function readHeader(headers: Headers, name: string): string | undefined {
+  const value = headers.get(name)?.trim()
+  return value || undefined
+}
+
+function captureResponseAvailability(data: unknown, headers: Headers): void {
+  if (data === null || (typeof data !== 'object' && typeof data !== 'function')) return
+  const source = readHeader(headers, DATA_SOURCE_HEADER)
+  const freshness = readHeader(headers, DATA_FRESHNESS_HEADER)
+  if (!source && !freshness) return
+  responseAvailability.set(data as object, { source, freshness })
+}
+
+/** Read availability metadata captured from the last successful fetch of this payload. */
+export function getResponseAvailability(data: unknown): ResponseAvailability | undefined {
+  if (data === null || (typeof data !== 'object' && typeof data !== 'function')) return undefined
+  return responseAvailability.get(data as object)
+}
+
+/** Test / manual helper — attach reported availability to a payload object. */
+export function rememberResponseAvailability(
+  data: object,
+  meta: ResponseAvailability,
+): void {
+  responseAvailability.set(data, meta)
+}
+
+/** Drop availability metadata from a payload (e.g. after a header-less refetch). */
+export function clearResponseAvailability(data: object): void {
+  responseAvailability.delete(data)
+}
+
+/**
+ * React Query structural sharing that keeps header availability in sync.
+ *
+ * Default `replaceEqualDeep` reuses the previous object when JSON is equal, which
+ * would leave stale WeakMap metadata attached after a stale→fresh (or fresh→partial)
+ * refetch of an identical body. Always re-bind the latest fetch's metadata onto the
+ * object that lands in the query cache.
+ */
+export function availabilityAwareStructuralSharing<T>(
+  oldData: T | undefined,
+  newData: T,
+): T {
+  const meta = getResponseAvailability(newData)
+  const shared = replaceEqualDeep(oldData, newData) as T
+  if (shared !== null && typeof shared === 'object') {
+    if (meta) {
+      rememberResponseAvailability(shared as object, meta)
+    } else {
+      clearResponseAvailability(shared as object)
+    }
+  }
+  return shared
+}
+
+export type ApiErrorKind = 'http' | 'timeout' | 'abort' | 'network'
+
+export class ApiError extends Error {
+  readonly kind: ApiErrorKind
+  readonly status?: number
+  readonly stale: boolean
+  readonly userMessage: string
+
+  constructor(
+    kind: ApiErrorKind,
+    message: string,
+    opts?: { status?: number; stale?: boolean; userMessage?: string },
+  ) {
+    super(message)
+    this.name = 'ApiError'
+    this.kind = kind
+    this.status = opts?.status
+    this.stale = opts?.stale ?? false
+    this.userMessage = opts?.userMessage ?? defaultUserMessage(kind, opts?.stale)
+  }
+}
+
+function defaultUserMessage(kind: ApiErrorKind, stale?: boolean): string {
+  if (stale) {
+    return 'Showing cached data because a fresh update did not arrive. Retry to refresh.'
+  }
+  switch (kind) {
+    case 'timeout':
+      return 'This request took too long. Check your connection, then retry.'
+    case 'abort':
+      return 'This request was cancelled. Retry when you are ready.'
+    case 'network':
+      return 'Could not reach box-box. Check your connection, then retry.'
+    case 'http':
+    default:
+      return 'Something went wrong loading this view. Retry to try again.'
+  }
+}
+
+export function isApiError(err: unknown): err is ApiError {
+  return err instanceof ApiError
+}
+
+export function isTimeoutError(err: unknown): boolean {
+  return isApiError(err) && err.kind === 'timeout'
+}
+
+export function userFacingError(err: unknown): string {
+  if (isApiError(err)) return err.userMessage
+  if (err instanceof Error && err.message) {
+    // Never surface raw "API 500: Internal Server Error" style strings.
+    if (/^API\s+\d+/i.test(err.message) || /status\s+\d+/i.test(err.message)) {
+      return defaultUserMessage('http')
+    }
+    return err.message
+  }
+  return defaultUserMessage('http')
+}
+
+export interface ApiFetchOptions {
+  timeoutMs?: number
+  signal?: AbortSignal
+  /** When set, concurrent identical in-flight requests share one promise. */
+  dedupeKey?: string
+  method?: string
+  headers?: HeadersInit
+  body?: BodyInit | null
+}
+
+interface InflightEntry {
+  /** Shared underlying fetch — not tied to any single caller's AbortSignal. */
+  promise: Promise<unknown>
+  /** Aborts the shared request only when the last subscriber cancels. */
+  controller: AbortController
+  subscribers: number
+}
+
+const inflight = new Map<string, InflightEntry>()
+
+function abortError(): ApiError {
+  return new ApiError('abort', 'Request aborted', {
+    userMessage: defaultUserMessage('abort'),
+  })
+}
+
+function combineAbortSignals(signals: AbortSignal[]): AbortSignal {
+  const controller = new AbortController()
+  const onAbort = () => {
+    const reason = signals.find((s) => s.aborted)?.reason
+    if (!controller.signal.aborted) {
+      controller.abort(reason)
+    }
+  }
+  for (const signal of signals) {
+    if (signal.aborted) {
+      onAbort()
+      break
+    }
+    signal.addEventListener('abort', onAbort, { once: true })
+  }
+  return controller.signal
+}
+
+async function parseErrorBody(res: Response): Promise<{ error?: string; stale?: boolean }> {
+  try {
+    const data = (await res.json()) as { error?: string; stale?: boolean }
+    return data ?? {}
+  } catch {
+    return {}
+  }
+}
+
+async function rawApiFetch<T>(url: string, options: ApiFetchOptions = {}): Promise<T> {
+  const timeoutMs = options.timeoutMs ?? DEFAULT_FETCH_TIMEOUT_MS
+  const timeoutController = new AbortController()
+  const timer = setTimeout(() => {
+    timeoutController.abort(new DOMException('Request timed out', 'TimeoutError'))
+  }, timeoutMs)
+
+  const signals = [timeoutController.signal]
+  if (options.signal) signals.push(options.signal)
+  const signal = combineAbortSignals(signals)
+
+  try {
+    let res: Response
+    try {
+      res = await fetch(url, {
+        method: options.method,
+        headers: options.headers,
+        body: options.body,
+        signal,
+      })
+    } catch (err) {
+      if (timeoutController.signal.aborted && !options.signal?.aborted) {
+        throw new ApiError('timeout', 'Request timed out', {
+          userMessage: defaultUserMessage('timeout'),
+        })
+      }
+      if (options.signal?.aborted || (err instanceof DOMException && err.name === 'AbortError')) {
+        throw abortError()
+      }
+      throw new ApiError('network', err instanceof Error ? err.message : 'Network error', {
+        userMessage: defaultUserMessage('network'),
+      })
+    }
+
+    if (!res.ok) {
+      const body = await parseErrorBody(res)
+      throw new ApiError('http', body.error || `HTTP ${res.status}`, {
+        status: res.status,
+        stale: Boolean(body.stale),
+        userMessage: body.stale
+          ? defaultUserMessage('http', true)
+          : defaultUserMessage('http'),
+      })
+    }
+
+    const data = (await res.json()) as T
+    captureResponseAvailability(data, res.headers)
+    return data
+  } finally {
+    clearTimeout(timer)
+  }
+}
+
+/**
+ * Attach a caller to a shared in-flight request.
+ * One caller's abort rejects only that caller; the shared fetch continues
+ * while other subscribers remain, and is cancelled only when the last one leaves.
+ */
+function subscribeToInflight<T>(
+  key: string,
+  entry: InflightEntry,
+  callerSignal?: AbortSignal,
+): Promise<T> {
+  if (callerSignal?.aborted) {
+    return Promise.reject(abortError())
+  }
+
+  entry.subscribers += 1
+
+  return new Promise<T>((resolve, reject) => {
+    let settled = false
+
+    const leave = () => {
+      entry.subscribers -= 1
+      if (entry.subscribers <= 0) {
+        if (!entry.controller.signal.aborted) {
+          entry.controller.abort()
+        }
+        if (inflight.get(key) === entry) {
+          inflight.delete(key)
+        }
+      }
+    }
+
+    const onCallerAbort = () => {
+      if (settled) return
+      settled = true
+      leave()
+      reject(abortError())
+    }
+
+    if (callerSignal) {
+      callerSignal.addEventListener('abort', onCallerAbort, { once: true })
+    }
+
+    entry.promise.then(
+      (value) => {
+        if (settled) return
+        settled = true
+        callerSignal?.removeEventListener('abort', onCallerAbort)
+        resolve(value as T)
+      },
+      (err) => {
+        if (settled) return
+        settled = true
+        callerSignal?.removeEventListener('abort', onCallerAbort)
+        reject(err)
+      },
+    )
+  })
+}
+
+/**
+ * Fetch JSON with a bounded timeout, abort propagation, typed errors,
+ * and optional in-flight deduplication (same key shares one underlying request).
+ *
+ * Deduped requests are subscriber-safe: aborting one consumer does not cancel
+ * or poison other consumers that still hold the same key (React Strict Mode remounts).
+ */
+export function apiFetch<T>(url: string, options: ApiFetchOptions = {}): Promise<T> {
+  const key = options.dedupeKey
+  if (!key) {
+    return rawApiFetch<T>(url, options)
+  }
+
+  if (options.signal?.aborted) {
+    return Promise.reject(abortError())
+  }
+
+  let entry = inflight.get(key)
+  if (!entry) {
+    const controller = new AbortController()
+    // Shared fetch only listens to the ref-counted controller + timeout —
+    // never to any single caller's AbortSignal.
+    const promise = rawApiFetch<T>(url, {
+      ...options,
+      signal: controller.signal,
+    }).finally(() => {
+      if (inflight.get(key)?.promise === promise) {
+        inflight.delete(key)
+      }
+    })
+    entry = { promise, controller, subscribers: 0 }
+    inflight.set(key, entry)
+  }
+
+  return subscribeToInflight<T>(key, entry, options.signal)
+}
+
+/** Test helper — clears the in-flight dedupe map. */
+export function clearApiFetchInflight(): void {
+  inflight.clear()
+}

frontend/src/lib/live.ts

@@ -268,63 +268,6 @@ export function driverCode(row: LiveTimingRow): string {
   return row.Info?.Tla || row.RacingNumber
 }
 
-/**
- * Parse an F1 lap-time string ("1:45.944", "45.944") into total seconds.
- * Returns null for empty/invalid values so callers never invent a gap.
- */
-export function parseLapTimeSeconds(value: string | null | undefined): number | null {
-  if (!value) return null
-  const match = value.trim().match(/^(?:(\d+):)?([0-5]?\d(?:\.\d+)?)$/)
-  if (!match) return null
-  const minutes = match[1] ? Number(match[1]) : 0
-  const seconds = Number(match[2])
-  if (!Number.isFinite(minutes) || !Number.isFinite(seconds)) return null
-  return minutes * 60 + seconds
-}
-
-export interface BestLapGap {
-  isLeader: boolean
-  gap: string
-}
-
-/**
- * Display-only gap-to-P1 for practice/qualifying, derived from each driver's
- * valid best lap. Only drivers with a parseable best lap get an entry, and the
- * fastest is flagged as the leader. Never fabricates a gap from a missing or
- * invalid lap — the upstream interval remains the source of truth for races.
- */
-export function bestLapGaps(rows: ReadonlyArray<LiveTimingRow>): Record<string, BestLapGap> {
-  let leaderNumber = ''
-  let best = Infinity
-  for (const row of rows) {
-    const seconds = parseLapTimeSeconds(row.Driver.BestLapTime)
-    if (seconds === null) continue
-    if (seconds < best) {
-      best = seconds
-      leaderNumber = row.RacingNumber
-    }
-  }
-
-  const out: Record<string, BestLapGap> = {}
-  if (!Number.isFinite(best)) return out
-  for (const row of rows) {
-    const seconds = parseLapTimeSeconds(row.Driver.BestLapTime)
-    if (seconds === null) continue
-    out[row.RacingNumber] =
-      row.RacingNumber === leaderNumber
-        ? { isLeader: true, gap: '' }
-        : { isLeader: false, gap: `+${(seconds - best).toFixed(3)}` }
-  }
-  return out
-}
-
-/** True when the live feed reports an in-progress session with timing data. */
-export function isLiveSessionActive(
-  state: { is_live?: boolean; data?: unknown } | null | undefined,
-): boolean {
-  return Boolean(state?.is_live && state.data)
-}
-
 export function trackStatusLabel(status: string): string {
   return TRACK_STATUS_LABELS[status] || status || 'UNKNOWN'
 }

frontend/src/lib/liveState.ts

@@ -0,0 +1,168 @@
+// Live timing state model.
+//
+// The Live page has to hold four *orthogonal* concepts that used to be
+// conflated into a single "connected / offline" flag:
+//
+//   1. transport health  — is the SSE stream up? (connecting/connected/…)
+//   2. active session     — is a session actually running right now?
+//   3. archive availability — do we retain a final snapshot to inspect?
+//   4. analysis readiness — is the completed session ingested for Race Hub?
+//
+// `deriveLivePhase` collapses the first three inputs into a single UI phase so
+// the page never, for example, calls a finished session "offline" or lets a
+// dropped socket masquerade as "archive mode".
+//
+// Critical distinction (issue #74 P0): the server's `deactivate()` path moves a
+// STILL-ACTIVE snapshot into `last_snapshot` whenever the upstream FIA SignalR
+// connection ends or idles — WITHOUT changing SessionStatus. So `is_live=false`
+// alone is ambiguous. We rely on the retained snapshot's terminal SessionStatus
+// (Finished/Ended/…) as the only trustworthy "the session really ended" signal.
+// A non-terminal retained snapshot means the feed dropped, not that the session
+// finished, and must render as `disconnected` (retain snapshot, warn, recover),
+// never `settling`/archive.
+
+export type TransportHealth = 'connecting' | 'connected' | 'disconnected' | 'error'
+
+export type LivePhase =
+  | 'connecting' // cold start: no snapshot yet, still opening the feed
+  | 'live' // a session is running and streaming
+  | 'disconnected' // was live, transport/feed dropped — keep the last snapshot, warn
+  | 'settling' // session truly ended; a final snapshot is retained, analysis pending
+  | 'archive' // user opened the retained snapshot as an explicit read-only view
+  | 'inactive' // no session and nothing retained — show weekend context instead
+
+export interface LiveStateInputs {
+  transport: TransportHealth
+  /** The feed reports an active session AND carries a snapshot for it. */
+  isLive: boolean
+  hasActiveSnapshot: boolean
+  /** A retained snapshot from the last stream is held (may be a dropped feed). */
+  hasArchive: boolean
+  /** The user explicitly opened the archive as a read-only timing view. */
+  archiveMode: boolean
+  /**
+   * The retained snapshot ended on a *terminal* FIA SessionStatus. Only true
+   * here means the session genuinely finished (vs. the transport dropping).
+   */
+  sessionEndedCleanly: boolean
+  /** We have observed this session live at least once in this page session. */
+  wasLive: boolean
+  /**
+   * The initial `/api/v1/live/state` query has resolved. `connecting` is a
+   * cold-start-only phase: once we know the current state (even if the SSE
+   * transport handshake is still pending), an idle feed is `inactive`, not a
+   * perpetual "connecting…" spinner.
+   */
+  stateLoaded: boolean
+}
+
+// Raw FIA SessionStatus values that mean the session is genuinely over. Mirrors
+// the backend `terminalSessionStatus` used by the weekend-context resolver so
+// the client and server agree on "finished".
+const TERMINAL_STATUSES = new Set(['finished', 'finalised', 'finalized', 'ended', 'aborted'])
+
+function normalizeStatus(status: string | undefined | null): string {
+  if (!status) return ''
+  return status.replace(/[^a-zA-Z]/g, '').toLowerCase()
+}
+
+/** Whether a raw FIA SessionStatus represents a genuinely completed session. */
+export function terminalSessionStatus(status: string | undefined | null): boolean {
+  return TERMINAL_STATUSES.has(normalizeStatus(status))
+}
+
+export function transportDown(transport: TransportHealth): boolean {
+  return transport === 'disconnected' || transport === 'error'
+}
+
+/**
+ * Map transport + session + archive inputs to one UI phase. Session lifecycle
+ * and transport health are deliberately orthogonal: a live session with a
+ * dropped socket is `disconnected` (snapshot retained), never `archive` or
+ * `settling`.
+ */
+export function deriveLivePhase(input: LiveStateInputs): LivePhase {
+  const {
+    transport,
+    isLive,
+    hasActiveSnapshot,
+    hasArchive,
+    archiveMode,
+    sessionEndedCleanly,
+    stateLoaded,
+  } = input
+
+  // Explicit read-only archive wins — it is a user-chosen mode.
+  if (archiveMode && hasArchive) return 'archive'
+
+  // An active session: transport health only downgrades the *presentation*,
+  // it never removes the session.
+  if (isLive && hasActiveSnapshot) {
+    return transportDown(transport) ? 'disconnected' : 'live'
+  }
+
+  // Feed reports no active session but a snapshot is retained. Distinguish a
+  // genuine session end from an upstream feed drop using the *only* trustworthy
+  // signal: whether the retained snapshot carries a terminal SessionStatus.
+  if (hasArchive) {
+    if (sessionEndedCleanly) return 'settling'
+    // Non-terminal retained snapshot means the upstream feed dropped, not that
+    // the session finished. Hold the last frame and warn — never settle/archive.
+    return 'disconnected'
+  }
+
+  // Cold start only: still opening the feed and we have not yet learned the
+  // current state. Once the initial state query resolves, an idle feed is
+  // `inactive`, not a perpetual "connecting…".
+  if (transport === 'connecting' && !stateLoaded) return 'connecting'
+
+  return 'inactive'
+}
+
+/** Phases that render the live timing tower / snapshot surface. */
+export function rendersSnapshot(phase: LivePhase): boolean {
+  return phase === 'live' || phase === 'disconnected' || phase === 'archive'
+}
+
+/**
+ * Whether live-only interpretations (pit-window rejoin, tyre-deg slope, "what
+ * just happened" deltas) are meaningful. They require a moving session, so an
+ * archived single frame must never present them as current insight.
+ */
+export function allowsLiveInterpretations(phase: LivePhase): boolean {
+  return phase === 'live' || phase === 'disconnected'
+}
+
+/** Read-only, timestamped phases that must not show live/connected chrome. */
+export function isReadOnlyPhase(phase: LivePhase): boolean {
+  return phase === 'archive'
+}
+
+/**
+ * Fan-facing feed health. Browser SSE can stay `connected` after an upstream
+ * FIA drop leaves us in `disconnected` with a retained non-terminal snapshot —
+ * present that as reconnecting, never "Feed healthy" beside "Connection lost".
+ */
+export function effectiveFeedHealth(
+  transport: TransportHealth,
+  phase: LivePhase,
+): TransportHealth {
+  if (phase === 'disconnected' && !transportDown(transport)) {
+    return 'disconnected'
+  }
+  return transport
+}
+
+/** Short, human transport-health label — always secondary to session state. */
+export function feedHealthLabel(transport: TransportHealth): string {
+  switch (transport) {
+    case 'connected':
+      return 'Feed healthy'
+    case 'connecting':
+      return 'Connecting'
+    case 'disconnected':
+      return 'Reconnecting'
+    case 'error':
+      return 'Feed unavailable'
+  }
+}

frontend/src/lib/queryClient.ts

@@ -0,0 +1,16 @@
+import { QueryClient } from '@tanstack/react-query'
+import { availabilityAwareStructuralSharing } from './fetch'
+
+/** Shared QueryClient defaults — availability-aware structural sharing for header metadata. */
+export function createAppQueryClient(): QueryClient {
+  return new QueryClient({
+    defaultOptions: {
+      queries: {
+        staleTime: 30_000,
+        // Explicit Retry on RouteState — avoid automatic retry storms.
+        retry: false,
+        structuralSharing: availabilityAwareStructuralSharing,
+      },
+    },
+  })
+}

frontend/src/lib/routeSearch.ts

@@ -0,0 +1,40 @@
+/** Shared URL search contracts for deep-linkable Weekend ↔ Race Hub navigation. */
+
+export type WeekendSearch = {
+  meeting_key?: number
+  session_key?: number
+}
+
+export type RaceHubSearch = {
+  session_key?: number
+}
+
+function parsePositiveInt(value: unknown): number | undefined {
+  const n = Number(value)
+  return Number.isFinite(n) && n > 0 ? n : undefined
+}
+
+export function parseWeekendSearch(search: Record<string, unknown>): WeekendSearch {
+  const meeting_key = parsePositiveInt(search.meeting_key)
+  const session_key = parsePositiveInt(search.session_key)
+  return {
+    ...(meeting_key ? { meeting_key } : {}),
+    ...(session_key ? { session_key } : {}),
+  }
+}
+
+export function parseRaceHubSearch(search: Record<string, unknown>): RaceHubSearch {
+  const session_key = parsePositiveInt(search.session_key)
+  return session_key ? { session_key } : {}
+}
+
+/** Build Weekend `/` search so a Race Hub return is reload-safe and deep-linkable. */
+export function weekendFocusSearch(
+  meetingKey?: number | null,
+  sessionKey?: number | null,
+): WeekendSearch {
+  return {
+    ...(meetingKey && meetingKey > 0 ? { meeting_key: meetingKey } : {}),
+    ...(sessionKey && sessionKey > 0 ? { session_key: sessionKey } : {}),
+  }
+}

frontend/src/lib/schedule.ts

@@ -145,15 +145,6 @@ export function formatSessionScheduleTime(value: string): string {
   })
 }
 
-export const MAX_BROWSER_TIMEOUT = 2_147_483_647
-
-export function refreshDeadlineDelay(refreshAt: string | undefined, now = Date.now()): number | null {
-  if (!refreshAt) return null
-  const deadline = Date.parse(refreshAt)
-  if (Number.isNaN(deadline)) return null
-  return Math.min(Math.max(0, deadline - now), MAX_BROWSER_TIMEOUT)
-}
-
 export type FocusMeetingKind = 'current' | 'next' | 'recent' | 'fallback'
 
 export function focusMeetingKind(meeting: Meeting, now: Date): FocusMeetingKind {

frontend/src/lib/sessionState.ts

@@ -0,0 +1,194 @@
+import type { ContextSession, WeekendContext, WeekendSession } from '../types'
+import { isSessionComplete } from './coverage'
+import { sessionStartTime } from './schedule'
+
+/**
+ * User-facing lifecycle state for a weekend session.
+ *
+ * Live comes only from Weekend Context's FIA-backed active identity — never from
+ * the scheduled start/end window alone. Preparing / partial / ready / unavailable
+ * come from structured `availability.local_analysis` when a context ref exists,
+ * otherwise from local dataset coverage after the scheduled start.
+ */
+export type SessionState =
+  | 'upcoming'
+  | 'live'
+  | 'preparing'
+  | 'partial'
+  | 'ready'
+  | 'unavailable'
+  | 'cancelled'
+
+export interface SessionStateInput {
+  weekendSession?: WeekendSession
+  context?: WeekendContext | null
+  now: Date
+}
+
+function contextRefFor(
+  context: WeekendContext | null | undefined,
+  sessionKey: number | undefined,
+): ContextSession | undefined {
+  if (!context || !sessionKey) return undefined
+  const refs = [
+    context.active_session,
+    context.default_analysis_session,
+    context.previous_completed_session,
+    context.next_session,
+  ]
+  return refs.find((ref) => ref?.session.session_key === sessionKey)
+}
+
+function fromAvailability(ref: ContextSession): SessionState | undefined {
+  const { schedule, live_session, local_analysis } = ref.availability
+  if (live_session === 'active') return 'live'
+  if (schedule === 'unavailable' || local_analysis === 'unavailable') return 'unavailable'
+  if (local_analysis === 'not_applicable') return 'upcoming'
+  if (local_analysis === 'pending') return 'preparing'
+  if (local_analysis === 'partial') return 'partial'
+  if (local_analysis === 'complete') return 'ready'
+  return undefined
+}
+
+/**
+ * Resolve fan-facing session state. Prefer Weekend Context availability; never
+ * assert Live from wall-clock schedule alone.
+ */
+export function resolveSessionState({
+  weekendSession,
+  context,
+  now,
+}: SessionStateInput): SessionState {
+  if (weekendSession?.source === 'cancelled') return 'cancelled'
+
+  const sessionKey = weekendSession?.session.session_key
+  const active = context?.active_session
+  if (
+    active &&
+    sessionKey &&
+    active.session.session_key === sessionKey &&
+    active.availability.live_session === 'active'
+  ) {
+    return 'live'
+  }
+
+  const ref = contextRefFor(context, sessionKey)
+  if (ref) {
+    const fromCtx = fromAvailability(ref)
+    if (fromCtx) return fromCtx
+  }
+
+  // Settling temporal state with no analysis yet — even without a matching ref.
+  if (
+    context?.temporal_state === 'session_settling' &&
+    weekendSession &&
+    weekendSession.source === 'none'
+  ) {
+    return 'preparing'
+  }
+
+  if (!weekendSession) return 'unavailable'
+
+  const start = sessionStartTime(weekendSession.session)
+  if (start && start > now) return 'upcoming'
+
+  if (isSessionComplete(weekendSession.datasets)) return 'ready'
+  if (weekendSession.source === 'none') return 'preparing'
+  if (weekendSession.source === 'partial') return 'partial'
+  return 'ready'
+}
+
+/** @deprecated Prefer resolveSessionState with Weekend Context. */
+export function sessionState(session: WeekendSession, now: Date): SessionState {
+  return resolveSessionState({ weekendSession: session, now })
+}
+
+/** Short label suitable for chips and the session switcher. */
+export function sessionStateLabel(state: SessionState): string {
+  switch (state) {
+    case 'upcoming':
+      return 'Upcoming'
+    case 'live':
+      return 'Live'
+    case 'preparing':
+      return 'Preparing'
+    case 'partial':
+      return 'Partial'
+    case 'ready':
+      return 'Ready'
+    case 'unavailable':
+      return 'Unavailable'
+    case 'cancelled':
+      return 'Cancelled'
+  }
+}
+
+/** Longer, sentence-style description for headers and empty states. */
+export function sessionStateDescription(state: SessionState): string {
+  switch (state) {
+    case 'upcoming':
+      return 'Session has not started yet.'
+    case 'live':
+      return 'Session is running now.'
+    case 'preparing':
+      return 'Analysis is being prepared — local data is still settling.'
+    case 'partial':
+      return 'Partial analysis available — some datasets are still missing.'
+    case 'ready':
+      return 'Full analysis is ready.'
+    case 'unavailable':
+      return 'Analysis is not available for this session.'
+    case 'cancelled':
+      return 'This session was cancelled.'
+  }
+}
+
+/**
+ * Class suffix used for the coverage dot, so the rail can colour a session by
+ * its lifecycle state rather than only by data source.
+ */
+export function sessionStateDotClass(state: SessionState): string {
+  switch (state) {
+    case 'ready':
+      return 'rh-state-ready'
+    case 'partial':
+      return 'rh-state-partial'
+    case 'live':
+      return 'rh-state-live'
+    case 'upcoming':
+      return 'rh-state-upcoming'
+    case 'unavailable':
+      return 'rh-state-unavailable'
+    case 'cancelled':
+      return 'rh-state-cancelled'
+    default:
+      return 'rh-state-preparing'
+  }
+}
+
+/** Whether a session should render the pre-session (expected availability) view. */
+export function isPreSession(state: SessionState): boolean {
+  return state === 'upcoming'
+}
+
+/** Settling / empty post-session — not yet analysable. */
+export function isPreparing(state: SessionState): boolean {
+  return state === 'preparing'
+}
+
+export function isUnavailable(state: SessionState): boolean {
+  return state === 'unavailable' || state === 'cancelled'
+}
+
+/** Show fan analysis with a partial banner; keep available capabilities. */
+export function isPartialAnalysis(state: SessionState): boolean {
+  return state === 'partial'
+}
+
+/** Canonical default analysis session key from Weekend Context, if any. */
+export function defaultAnalysisSessionKey(
+  context: WeekendContext | null | undefined,
+): number | undefined {
+  const key = context?.default_analysis_session?.session.session_key
+  return key && key > 0 ? key : undefined
+}

frontend/src/lib/weekendContext.ts

@@ -0,0 +1,181 @@
+import type {
+  ChampionshipHub,
+  ContextSession,
+  EnrichedResult,
+  Meeting,
+  NewsItem,
+  Session,
+  WeekendBriefingItem,
+  WeekendChampionshipImpact,
+  WeekendChampionshipMover,
+  WeekendContext,
+  WeekendPodiumEntry,
+  WeekendViewState,
+} from '../types'
+
+/**
+ * resolveViewState maps the canonical `temporal_state` onto the rendered Weekend
+ * view. It is a total function: every valid canonical `temporal_state` resolves
+ * to a concrete view, so a well-formed payload never falls through to a
+ * limited/empty placeholder. Loading and error are hook-level states that are
+ * not part of the #72 contract.
+ */
+export function resolveViewState(context: WeekendContext): WeekendViewState {
+  switch (context.temporal_state) {
+    case 'no_season':
+      return 'no_season'
+    case 'between_weekends':
+      return 'between_weekends'
+    case 'pre_session':
+      return 'pre_session'
+    case 'session_live':
+      return 'session_live'
+    case 'session_settling':
+      return 'session_settling'
+    case 'between_sessions':
+      return 'between_sessions'
+    case 'post_weekend':
+      return 'post_weekend'
+    case 'season_complete':
+      return 'season_complete'
+    default:
+      // Unknown/absent temporal_state is an invalid payload — treat as no_season
+      // rather than inventing a state. The hook still shows an explicit surface.
+      return 'no_season'
+  }
+}
+
+export interface MeetingIdentity {
+  meeting_key: number
+  meeting_name: string
+  short_name: string
+  country_code: string
+  country_flag: string
+  circuit_short_name: string
+  circuit_key?: number
+  date_start?: string
+  date_end?: string
+}
+
+/** Presentation identity for a meeting, tolerant of partial/absent fields. */
+export function meetingIdentity(meeting: Meeting | undefined): MeetingIdentity | undefined {
+  if (!meeting) return undefined
+  return {
+    meeting_key: meeting.meeting_key,
+    meeting_name: meeting.meeting_name || meeting.location || 'Grand Prix',
+    short_name: (meeting.meeting_name || meeting.location || 'Grand Prix').replace(/ Grand Prix$/i, ''),
+    country_code: meeting.country_code,
+    country_flag: meeting.country_flag,
+    circuit_short_name: meeting.circuit_short_name || meeting.location || '',
+    circuit_key: meeting.circuit_key,
+    date_start: meeting.date_start || undefined,
+    date_end: meeting.date_end || undefined,
+  }
+}
+
+/** Session identity paired with its resolved meeting for a canonical ContextSession. */
+export function sessionMeeting(ref: ContextSession | undefined): Meeting | undefined {
+  return ref?.meeting
+}
+
+export function sessionOf(ref: ContextSession | undefined): Session | undefined {
+  return ref?.session
+}
+
+/**
+ * analysisSessionKey resolves the session a user should open to read analysis for
+ * a completed event. It prefers the canonical default analysis session, falling
+ * back to the previous completed session. Returns undefined when nothing analysable
+ * is available (e.g. an archived result with no local analysis).
+ */
+export function analysisSessionKey(context: WeekendContext): number | undefined {
+  const key =
+    context.default_analysis_session?.session.session_key ??
+    context.previous_completed_session?.session.session_key
+  return key && key > 0 ? key : undefined
+}
+
+/** True when a ContextSession has local analysis worth linking to. */
+export function hasLocalAnalysis(ref: ContextSession | undefined): boolean {
+  const status = ref?.availability.local_analysis
+  return status === 'complete' || status === 'partial'
+}
+
+/** Countdown target for a session reference — its scheduled start, if known. */
+export function sessionStart(ref: ContextSession | undefined): string | undefined {
+  const start = ref?.session.date_start
+  return start ? start : undefined
+}
+
+export function podiumFromResults(results: EnrichedResult[]): WeekendPodiumEntry[] {
+  return [...results]
+    .filter((r) => r.position >= 1)
+    .sort((a, b) => a.position - b.position)
+    .slice(0, 3)
+    .map((r) => ({
+      position: r.position,
+      driver_number: r.driver_number,
+      name_acronym: r.name_acronym,
+      team_name: r.team_name,
+      team_colour: r.team_colour,
+      gap: formatResultGap(r),
+    }))
+}
+
+function formatResultGap(r: EnrichedResult): string {
+  if (r.dnf) return 'DNF'
+  if (r.dns) return 'DNS'
+  if (r.dsq) return 'DSQ'
+  if (r.position === 1) {
+    if (typeof r.duration === 'number' && r.duration > 0) return formatDuration(r.duration)
+    return 'Winner'
+  }
+  const gap = Array.isArray(r.gap_to_leader) ? r.gap_to_leader[r.gap_to_leader.length - 1] : r.gap_to_leader
+  if (typeof gap === 'number') return `+${gap.toFixed(3)}`
+  if (typeof gap === 'string' && gap) return gap.startsWith('+') ? gap : `+${gap}`
+  return '—'
+}
+
+function formatDuration(seconds: number): string {
+  const h = Math.floor(seconds / 3600)
+  const m = Math.floor((seconds % 3600) / 60)
+  const s = seconds % 60
+  if (h > 0) return `${h}:${String(m).padStart(2, '0')}:${s.toFixed(3).padStart(6, '0')}`
+  return `${m}:${s.toFixed(3).padStart(6, '0')}`
+}
+
+/**
+ * championshipImpact derives the top-of-standings movers from the championship
+ * hub. This is supplementary data layered onto the canonical context, not part of
+ * the #72 contract.
+ */
+export function championshipImpact(hub: ChampionshipHub | undefined): WeekendChampionshipImpact | undefined {
+  if (!hub || hub.drivers.length === 0) return undefined
+  const leaders: WeekendChampionshipMover[] = hub.drivers.slice(0, 3).map((d) => {
+    const cumulative = d.cumulative ?? []
+    const delta =
+      cumulative.length >= 2 ? cumulative[cumulative.length - 1] - cumulative[cumulative.length - 2] : undefined
+    return {
+      position: d.position,
+      driver_number: d.driver_number,
+      name_acronym: d.name_acronym,
+      team_colour: d.team_colour,
+      points: d.points,
+      delta,
+    }
+  })
+  const note = hub.last_race ? `Standings after ${hub.last_race}.` : undefined
+  return { leaders, note }
+}
+
+/** At most three briefing items, mapped from the news feed. */
+export function briefingItems(news: NewsItem[]): WeekendBriefingItem[] {
+  return news.slice(0, 3).map((item) => ({
+    category: item.category,
+    title: item.title,
+    url: item.url,
+    source: item.source,
+    published_at: item.published_at,
+    image_url: item.og_image_url,
+  }))
+}

frontend/src/main.tsx

@@ -1,18 +1,12 @@
 import React from 'react'
 import ReactDOM from 'react-dom/client'
 import { RouterProvider } from '@tanstack/react-router'
-import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { QueryClientProvider } from '@tanstack/react-query'
+import { createAppQueryClient } from './lib/queryClient'
 import { router } from './router'
 import './styles/app.css'
 
-const queryClient = new QueryClient({
+const queryClient = createAppQueryClient()
-  defaultOptions: {
-    queries: {
-      staleTime: 30_000,
-      retry: 1,
-    },
-  },
-})
 
 ReactDOM.createRoot(document.getElementById('root')!).render(
   <React.StrictMode>

frontend/src/pages/BriefingPage.tsx

@@ -24,6 +24,8 @@ import {
 } from '../lib/digest'
 import { stripHtml, timeAgo } from '../utils'
 import type { ArticleContent, NewsItem } from '../types'
+import { DataNotice, RouteState } from '../components/RouteState'
+import { aggregateNotices, noticeFromResponse, noticeMessage } from '../lib/availability'
 import '../styles/digest.css'
 
 type Category = 'all' | 'official' | 'news' | 'video'
@@ -406,27 +408,27 @@ export function BriefingPage() {
   const queryClient = useQueryClient()
   const now = useMemo(() => new Date(), [])
 
-  const { data: allNews = [], isLoading, isError } = useQuery({
+  const { data: allNews = [], isLoading, isError, error, refetch, isFetching } = useQuery({
     queryKey: ['news'],
-    queryFn: () => fetchNews(100),
+    queryFn: ({ signal }) => fetchNews(100, undefined, signal),
     staleTime: 60_000,
   })
 
   const seasonsQuery = useQuery({
     queryKey: ['seasons'],
-    queryFn: fetchSeasons,
+    queryFn: ({ signal }) => fetchSeasons(signal),
   })
   const latestSeason = seasonsQuery.data?.[0] ?? null
 
   const meetingsQuery = useQuery({
     queryKey: ['season-meetings', latestSeason],
-    queryFn: () => fetchSeasonMeetings(latestSeason!),
+    queryFn: ({ signal }) => fetchSeasonMeetings(latestSeason!, signal),
     enabled: latestSeason != null,
   })
 
   const hubQuery = useQuery({
     queryKey: ['championship-hub', latestSeason],
-    queryFn: () => fetchChampionshipHub(latestSeason!),
+    queryFn: ({ signal }) => fetchChampionshipHub(latestSeason!, signal),
     enabled: latestSeason != null,
   })
 
@@ -515,6 +517,43 @@ export function BriefingPage() {
   const hasDigest = meetings.length > 0
   const showEmpty = tagFiltered.length === 0 && grouped.recent.length === 0
 
+  const supplementsFetching =
+    meetingsQuery.isFetching || hubQuery.isFetching || seasonsQuery.isFetching
+  // React Query v5 clears isError while a post-error refetch is in flight
+  // (status → pending). Keep Limited mounted so Retry can show aria-busy.
+  const supplementDegraded = (q: {
+    isError: boolean
+    isFetching: boolean
+    isFetched: boolean
+    data: unknown
+  }) => q.isError || (q.isFetching && q.isFetched && q.data == null)
+  const supplementsLimited =
+    !isLoading &&
+    !isError &&
+    (supplementDegraded(meetingsQuery) ||
+      supplementDegraded(hubQuery) ||
+      supplementDegraded(seasonsQuery))
+  const supplementsRetrying = supplementsLimited && supplementsFetching
+
+  const retrySupplements = () => {
+    if (supplementDegraded(meetingsQuery) && !meetingsQuery.isFetching) {
+      void meetingsQuery.refetch()
+    }
+    if (supplementDegraded(hubQuery) && !hubQuery.isFetching) {
+      void hubQuery.refetch()
+    }
+    if (supplementDegraded(seasonsQuery) && !seasonsQuery.isFetching) {
+      void seasonsQuery.refetch()
+    }
+  }
+
+  // Aggregate by severity so routine local News cannot mask stale hub/meetings.
+  const availability = aggregateNotices([
+    noticeFromResponse(allNews, { includeLocal: true }),
+    noticeFromResponse(hub, { includeLocal: false }),
+    noticeFromResponse(meetings, { includeLocal: false }),
+  ])
+
   return (
     <div className="bp-page" data-testid="briefing-page">
       <div className="bp-topbar">
@@ -524,11 +563,45 @@ export function BriefingPage() {
         </span>
       </div>
 
-      {isLoading && <div className="loading-state">loading briefing…</div>}
+      {isLoading && (
-      {isError && <div className="error-box">Failed to load paddock briefing.</div>}
+        <RouteState kind="loading" title="loading briefing…" testId="briefing-loading" />
+      )}
+      {isError && (
+        <RouteState
+          kind="error"
+          title="Briefing unavailable"
+          error={error}
+          onRetry={() => {
+            if (!isFetching) void refetch()
+          }}
+          retrying={isFetching}
+          testId="briefing-error"
+        />
+      )}
 
       {!isLoading && !isError && (
         <>
+          {supplementsLimited && (
+            <DataNotice
+              availability="limited"
+              message="Weekend grouping or driver tags are limited. Articles are still available."
+              onRetry={retrySupplements}
+              retrying={supplementsRetrying}
+              testId="briefing-data-notice"
+            />
+          )}
+          {!supplementsLimited && availability && (
+            <DataNotice
+              availability={availability}
+              message={noticeMessage(availability)}
+              onRetry={() => {
+                if (!isFetching) void refetch()
+              }}
+              retrying={isFetching}
+              testId="briefing-data-notice"
+            />
+          )}
+
           <CategoryTabs
             active={activeCategory}
             counts={counts}

frontend/src/pages/ChampionshipPage.tsx

@@ -7,7 +7,9 @@ import type { ChampHubDriver, ChampionshipHub } from '../types'
 import { ChampionshipSimulator } from '../components/ChampionshipSimulator'
 import { RivalryCompare } from '../components/RivalryCompare'
 import { Meaning } from '../components/Meaning'
+import { DataNotice, RouteState } from '../components/RouteState'
 import { TeammateH2H } from '../components/TeammateH2H'
+import { noticeFromResponse, noticeMessage } from '../lib/availability'
 import { teammatePairs } from '../lib/h2h'
 import { pointsGapMeaning } from '../lib/meaning'
 
@@ -81,23 +83,55 @@ function teamSplit(teamName: string, drivers: ChampHubDriver[]): TeamSplit {
 export function ChampionshipPage() {
   const [view, setView] = useState<View>('drivers')
 
-  const seasonsQuery = useQuery({ queryKey: ['seasons'], queryFn: fetchSeasons })
+  const seasonsQuery = useQuery({
+    queryKey: ['seasons'],
+    queryFn: ({ signal }) => fetchSeasons(signal),
+  })
   const latestSeason = seasonsQuery.data?.[0] ?? null
 
   const hubQuery = useQuery({
     queryKey: ['championship-hub', latestSeason],
-    queryFn: () => fetchChampionshipHub(latestSeason ?? undefined),
+    queryFn: ({ signal }) => fetchChampionshipHub(latestSeason ?? undefined, signal),
     enabled: latestSeason != null,
     staleTime: 5 * 60_000,
   })
 
   if (seasonsQuery.isLoading || hubQuery.isLoading) {
-    return <div className="page loading-state">loading championship…</div>
+    return (
+      <div className="page">
+        <RouteState kind="loading" title="loading championship…" testId="championship-loading" />
+      </div>
+    )
+  }
+  if (seasonsQuery.isError) {
+    return (
+      <div className="page">
+        <RouteState
+          kind="error"
+          title="Championship unavailable"
+          error={seasonsQuery.error}
+          onRetry={() => {
+            if (!seasonsQuery.isFetching) void seasonsQuery.refetch()
+          }}
+          retrying={seasonsQuery.isFetching}
+          testId="championship-error"
+        />
+      </div>
+    )
   }
   if (hubQuery.isError) {
     return (
-      <div className="page error-box">
+      <div className="page">
-        {hubQuery.error instanceof Error ? hubQuery.error.message : 'Failed to load championship'}
+        <RouteState
+          kind="error"
+          title="Championship unavailable"
+          error={hubQuery.error}
+          onRetry={() => {
+            if (!hubQuery.isFetching) void hubQuery.refetch()
+          }}
+          retrying={hubQuery.isFetching}
+          testId="championship-error"
+        />
       </div>
     )
   }
@@ -118,16 +152,32 @@ export function ChampionshipPage() {
     )
   }
 
-  return <ChampionshipBody hub={hub} view={view} setView={setView} />
+  const availability = noticeFromResponse(hub, { includeLocal: true })
+
+  return (
+    <ChampionshipBody
+      hub={hub}
+      view={view}
+      setView={setView}
+      availability={availability}
+      onRetry={() => {
+        if (!hubQuery.isFetching) void hubQuery.refetch()
+      }}
+      retrying={hubQuery.isFetching}
+    />
+  )
 }
 
 interface BodyProps {
   hub: ChampionshipHub
   view: View
   setView: (v: View) => void
+  availability?: ReturnType<typeof noticeFromResponse>
+  onRetry?: () => void
+  retrying?: boolean
 }
 
-function ChampionshipBody({ hub, view, setView }: BodyProps) {
+function ChampionshipBody({ hub, view, setView, availability, onRetry, retrying }: BodyProps) {
   const { drivers, teams } = hub
   const leader = drivers[0]
   const remaining = hub.rounds_left * 25
@@ -183,6 +233,15 @@ function ChampionshipBody({ hub, view, setView }: BodyProps) {
 
   return (
     <div className="champ-page" data-testid="championship">
+      {availability && (
+        <DataNotice
+          availability={availability}
+          message={noticeMessage(availability)}
+          onRetry={onRetry}
+          retrying={retrying}
+          testId="championship-data-notice"
+        />
+      )}
       <div className="champ-header">
         <div className="champ-title-row">
           <span className="champ-accent" aria-hidden="true" />

frontend/src/pages/CommandCenterPage.tsx

@@ -1,451 +0,0 @@
-import { useEffect, useMemo, useState } from 'react'
-import { useQueries, useQuery } from '@tanstack/react-query'
-import { Link } from '@tanstack/react-router'
-import {
-  fetchChampionshipHub,
-  fetchLiveState,
-  fetchLocalMeetings,
-  fetchRaceHub,
-  fetchSeasonMeetings,
-  fetchSeasons,
-  fetchSessions,
-  fetchWeekend,
-} from '../api'
-import { CommandCenterHero } from '../components/CommandCenterHero'
-import { PaddockBriefing } from '../components/PaddockBriefing'
-import { RACE_HUB_DATASETS, countWeekendStats, formatCoverageHint, sessionTypeAbbrev } from '../lib/coverage'
-import { countryAccent, countryDecal, countryFlag, formatGpDateRange } from '../lib/gpIdentity'
-import { classifySessionStatus, heroState } from '../lib/hero'
-import {
-  currentAndNextSession,
-  focusMeetingKind,
-  formatSessionScheduleTime,
-  meetingHasStarted,
-  mostRecentPastMeeting,
-  nextUpcomingMeeting,
-  pickFocusMeeting,
-  sortSessionsByStart,
-} from '../lib/schedule'
-import type { Meeting, Session, Weekend, WeekendSession } from '../types'
-import { Trophy } from 'lucide-react'
-
-const missingDatasets = Object.fromEntries(
-  RACE_HUB_DATASETS.map((dataset) => [dataset, { status: 'missing', source: 'none', count: 0 }]),
-) as WeekendSession['datasets']
-
-function meetingStatus(meeting: Meeting, focusKey: number | undefined, now: Date) {
-  if (meeting.meeting_key === focusKey) return 'focus'
-  if (meetingHasStarted(meeting, now)) return 'past'
-  return 'future'
-}
-
-function pickAnalysisSession(weekend: Weekend | undefined): WeekendSession | undefined {
-  if (!weekend) return undefined
-  const local = weekend.sessions.filter((s) => s.source === 'local')
-  const partial = weekend.sessions.filter((s) => s.source === 'partial')
-  const pool = local.length > 0 ? local : partial.length > 0 ? partial : weekend.sessions
-  const race = pool.find((s) => s.session.session_type?.toLowerCase().includes('race'))
-  if (race) return race
-  const qual = pool.find((s) => s.session.session_type?.toLowerCase().includes('qualifying'))
-  if (qual) return qual
-  return pool[0]
-}
-
-export function CommandCenterPage() {
-  const [now, setNow] = useState(() => Date.now())
-
-  const seasonsQuery = useQuery({
-    queryKey: ['seasons'],
-    queryFn: fetchSeasons,
-  })
-
-  const latestSeason = seasonsQuery.data?.[0] ?? null
-
-  const meetingsQuery = useQuery({
-    queryKey: ['meetings', latestSeason],
-    queryFn: () => fetchLocalMeetings(latestSeason!),
-    enabled: latestSeason != null,
-  })
-
-  const seasonMeetingsQuery = useQuery({
-    queryKey: ['season-meetings', latestSeason],
-    queryFn: () => fetchSeasonMeetings(latestSeason!),
-    enabled: latestSeason != null,
-  })
-
-  const localMeetings = meetingsQuery.data ?? []
-  const seasonMeetings = seasonMeetingsQuery.data?.length ? seasonMeetingsQuery.data : localMeetings
-  const focusMeetings = seasonMeetings.length > 0 ? seasonMeetings : localMeetings
-
-  const weekendQueries = useQueries({
-    queries: localMeetings.map((meeting) => ({
-      queryKey: ['weekend', meeting.meeting_key],
-      queryFn: () => fetchWeekend(meeting.meeting_key),
-      enabled: localMeetings.length > 0,
-      staleTime: 60_000,
-    })),
-  })
-
-  const liveQuery = useQuery({
-    queryKey: ['live-state'],
-    queryFn: fetchLiveState,
-    staleTime: 5_000,
-  })
-
-  const championshipQuery = useQuery({
-    queryKey: ['championship-hub', latestSeason],
-    queryFn: () => fetchChampionshipHub(latestSeason!),
-    enabled: latestSeason != null,
-  })
-  const champHub = championshipQuery.data
-
-  useEffect(() => {
-    const timer = window.setInterval(() => setNow(Date.now()), 1000)
-    return () => window.clearInterval(timer)
-  }, [])
-
-  const nowDate = useMemo(() => new Date(now), [now])
-
-  const weekendsByKey = useMemo(() => {
-    const map = new Map<number, Weekend>()
-    localMeetings.forEach((meeting, i) => {
-      const data = weekendQueries[i]?.data
-      if (data) map.set(meeting.meeting_key, data)
-    })
-    return map
-  }, [localMeetings, weekendQueries])
-
-  const weekendList = useMemo(() => weekendQueries.map((q) => q.data), [weekendQueries])
-  const meetingStats = countWeekendStats(weekendList)
-  const focusMeeting = pickFocusMeeting(focusMeetings, nowDate)
-  const focusWeekend = focusMeeting ? weekendsByKey.get(focusMeeting.meeting_key) : undefined
-  const openF1SessionsQuery = useQuery({
-    queryKey: ['sessions', focusMeeting?.meeting_key, 'openf1'],
-    queryFn: () => fetchSessions(focusMeeting!.meeting_key, 'openf1'),
-    enabled: focusMeeting != null && focusWeekend == null,
-    staleTime: 60_000,
-  })
-  const openF1WeekendSessions: WeekendSession[] = useMemo(
-    () =>
-      (openF1SessionsQuery.data ?? []).map((session) => ({
-        session,
-        source: 'none',
-        datasets: missingDatasets,
-      })),
-    [openF1SessionsQuery.data],
-  )
-  const focusWeekendSessions = focusWeekend?.sessions ?? openF1WeekendSessions
-  const focusKind = focusMeeting ? focusMeetingKind(focusMeeting, nowDate) : null
-  const focusSessions: Session[] = sortSessionsByStart(focusWeekendSessions.map((s) => s.session))
-  const { current: currentSession, next: nextSession } = currentAndNextSession(focusSessions, nowDate)
-
-  const analysisSession = pickAnalysisSession(focusWeekend)
-  const actionSession =
-    analysisSession?.session ??
-    currentSession ??
-    nextSession ??
-    focusWeekendSessions.find((s) => s.session.session_key === focusWeekend?.default_session_key)?.session ??
-    focusWeekendSessions[0]?.session
-  const analysisSessionKey = actionSession?.session_key
-
-  const liveActive = liveQuery.data?.is_live === true
-  const heroStateKind = heroState({
-    now: nowDate,
-    liveActive,
-    currentSession,
-    focusKind,
-  })
-
-  const lastPastMeeting = useMemo(
-    () => mostRecentPastMeeting(focusMeetings, nowDate),
-    [focusMeetings, nowDate],
-  )
-  const lastPastWeekend = lastPastMeeting ? weekendsByKey.get(lastPastMeeting.meeting_key) : undefined
-  const lastRaceAnalysis = pickAnalysisSession(lastPastWeekend)
-  const lastRaceSessionKey = lastRaceAnalysis?.session.session_key
-
-  const lastRaceHubQuery = useQuery({
-    queryKey: ['race-hub', lastRaceSessionKey, 'hero-podium'],
-    queryFn: () => fetchRaceHub(lastRaceSessionKey!),
-    enabled: lastRaceSessionKey != null && heroStateKind === 'between',
-    staleTime: 60_000,
-  })
-
-  const nextMeetingForHero = useMemo(() => {
-    if (heroStateKind !== 'between') return null
-    return nextUpcomingMeeting(focusMeetings, nowDate)
-  }, [heroStateKind, focusMeetings, nowDate])
-
-  const lastRacePodium = lastRaceHubQuery.data?.results ?? []
-  const lastRaceName = champHub?.last_race ?? lastPastMeeting?.meeting_name ?? ''
-
-  if (seasonsQuery.isLoading) {
-    return <div className="page loading-state">loading command center…</div>
-  }
-
-  if (seasonsQuery.isError) {
-    return (
-      <div className="page error-box">
-        {seasonsQuery.error instanceof Error ? seasonsQuery.error.message : 'Failed to load seasons'}
-      </div>
-    )
-  }
-
-  const seasons = seasonsQuery.data ?? []
-
-  if (seasons.length === 0) {
-    return (
-      <div className="cc-page cc-empty" data-testid="command-center-empty">
-        <div className="cc-empty-band">
-          <span className="cc-empty-eyebrow mono">box-box · command center</span>
-          <h1 className="cc-empty-title">No local data yet</h1>
-          <p className="cc-empty-sub">
-            Ingest a race weekend from the CLI to populate this screen with live status, next-session
-            countdowns, and analysis links.
-          </p>
-        </div>
-        <div className="cc-empty-actions">
-          <Link to="/live" className="cc-action cc-action-live">
-            <span className="cc-action-label">Live Timing</span>
-            <span className="cc-action-meta">Standby</span>
-          </Link>
-          <Link to="/admin" className="cc-action">
-            <span className="cc-action-label">Admin · Data Health</span>
-            <span className="cc-action-meta">Ingestion guidance</span>
-          </Link>
-        </div>
-      </div>
-    )
-  }
-
-  const accent = countryAccent(focusMeeting ?? null)
-  const accentStyle = { '--gp-accent': accent } as React.CSSProperties
-
-  return (
-    <div className="cc-page" data-testid="command-center" style={accentStyle}>
-      <div className="cc-topbar">
-        <span className="cc-topbar-label mono">box-box · command center</span>
-        <span className="cc-topbar-meta mono">
-          {latestSeason} season · {meetingStats.full}/{meetingStats.total || 0} weekends full
-        </span>
-        <span className="cc-live-pill" data-testid="cc-live-status">
-          <span className={`cc-live-dot ${liveActive ? 'live' : ''}`} />
-          {liveActive ? 'Live session active' : 'No live session'}
-        </span>
-      </div>
-
-      {!focusMeeting && (
-        <div className="missing-notice">
-          No meetings ingested for {latestSeason}. Run{' '}
-          <code>box-box --ingest-year {latestSeason}</code>
-        </div>
-      )}
-
-      {focusMeeting && focusKind && (
-        <CommandCenterHero
-          state={heroStateKind}
-          now={nowDate}
-          accent={accent}
-          liveActive={liveActive}
-          liveData={liveQuery.data?.data}
-          focusMeeting={focusMeeting}
-          focusKind={focusKind}
-          sessions={focusWeekendSessions}
-          currentSession={currentSession}
-          nextSession={nextSession}
-          analysisSessionKey={analysisSessionKey}
-          analysisSessionName={actionSession?.session_name}
-          lastRaceName={lastRaceName}
-          lastRacePodium={lastRacePodium}
-          lastRaceSessionKey={lastRaceSessionKey}
-          nextMeeting={nextMeetingForHero}
-        />
-      )}
-
-      <div className="cc-dashboard-grid">
-        <div className="cc-dashboard-main">
-          <div 
-            className="cc-ambient-aura" 
-            aria-hidden="true" 
-            style={focusMeeting ? { '--aura-accent': countryAccent(focusMeeting) } as React.CSSProperties : undefined} 
-          />
-          <div className="cc-dashboard-panel">
-            {seasonMeetings.length > 0 && (
-              <section className="cc-season-calendar" data-testid="cc-season-calendar">
-              <div className="sec-header">
-                <span className="sec-title">Season Calendar</span>
-                <span className="sec-meta mono">
-                  {seasonMeetings.length} rounds · {meetingStats.full}/{meetingStats.total || 0} local
-                </span>
-              </div>
-              <div className="cc-calendar-grid" role="list">
-                {seasonMeetings.map((meeting, index) => {
-                  const weekend = weekendsByKey.get(meeting.meeting_key)
-                  const target = pickAnalysisSession(weekend)
-                  const targetKey = target?.session.session_key ?? weekend?.default_session_key
-                  const status = meetingStatus(meeting, focusMeeting?.meeting_key, nowDate)
-                  const cardAccent = countryAccent(meeting)
-                  return (
-                    <Link
-                      key={meeting.meeting_key}
-                      to="/race-hub"
-                      search={targetKey ? { session_key: targetKey } : {}}
-                      className={`cc-calendar-card cc-calendar-${status}`}
-                      data-testid={`cc-calendar-${meeting.meeting_key}`}
-                      role="listitem"
-                      style={{ '--gp-card-accent': cardAccent } as React.CSSProperties}
-                    >
-                      <div className="cc-calendar-accent" aria-hidden="true" />
-                      <div className="cc-calendar-top mono">
-                        <span className="cc-calendar-round">R{String(index + 1).padStart(2, '0')}</span>
-                        <span className={`cc-cov-dot cc-cov-${weekend?.source ?? 'none'}`} aria-hidden="true" />
-                      </div>
-                      <div className="cc-calendar-id">
-                        {countryFlag(meeting) && <span className="cc-calendar-flag">{countryFlag(meeting)}</span>}
-                      </div>
-                      <span className="cc-calendar-decal mono">{countryDecal(meeting)}</span>
-                      <div className="cc-calendar-copy">
-                        <div className="cc-calendar-name">{meeting.meeting_name}</div>
-                        <div className="cc-calendar-circuit mono">{meeting.circuit_short_name || meeting.location}</div>
-                        <div className="cc-calendar-date mono">{formatGpDateRange(meeting)}</div>
-                      </div>
-                    </Link>
-                  )
-                })}
-              </div>
-              {seasonMeetingsQuery.isError && (
-                <div className="cc-side-empty">Using local meetings because the full calendar could not load.</div>
-              )}
-            </section>
-            )}
-          </div>
-        </div>
-
-        <div className="cc-dashboard-sidebar">
-          {champHub && (
-            <section className="cc-champ-snapshot glass-panel" data-testid="cc-champ-snapshot" style={{ padding: 'var(--s5)', borderRadius: '12px' }}>
-              <div className="cc-champ-header">
-                <span>Championship Leaders</span>
-                <Link to="/championship" className="cc-champ-link">Full Standings →</Link>
-              </div>
-              <div className="cc-champ-group-label">Drivers</div>
-              <div className="cc-champ-list">
-                {champHub.drivers.slice(0, 3).map((d) => (
-                  <div key={d.driver_number} className="cc-champ-row">
-                    <div className="cc-champ-left">
-                      <div className="cc-champ-color" style={{ color: `#${d.team_colour}`, background: 'currentColor' }} />
-                      <span className="cc-champ-name">{d.name_acronym}</span>
-                    </div>
-                    <div className="cc-champ-form" title="Last 5 races">
-                      <FormSparkline form={d.form} color={`#${d.team_colour}`} />
-                    </div>
-                    <div className="cc-champ-right">
-                      <span className="cc-champ-gap">
-                        {d.position === 1 ? '—' : `-${champHub.drivers[0].points - d.points}`}
-                      </span>
-                      <span className="cc-champ-pts">{d.points}</span>
-                    </div>
-                  </div>
-                ))}
-              </div>
-              <div className="cc-champ-group-label">Constructors</div>
-              <div className="cc-champ-list">
-                {champHub.teams.slice(0, 3).map((t, i) => (
-                  <div key={t.team_name} className="cc-champ-row">
-                    <div className="cc-champ-left">
-                      <div className="cc-champ-color" style={{ color: `#${t.team_colour}`, background: 'currentColor' }} />
-                      <span className="cc-champ-name">{t.team_name}</span>
-                    </div>
-                    <div className="cc-champ-form" style={{ opacity: 0.4, fontSize: '11px', display: 'flex', gap: '4px', alignItems: 'center' }} title={`${t.wins} Wins`}>
-                      <Trophy size={12} /> {t.wins}
-                    </div>
-                    <div className="cc-champ-right">
-                      <span className="cc-champ-gap">
-                        {i === 0 ? '—' : `-${champHub.teams[0].points - t.points}`}
-                      </span>
-                      <span className="cc-champ-pts">{t.points}</span>
-                    </div>
-                  </div>
-                ))}
-              </div>
-            </section>
-          )}
-
-          {focusWeekendSessions.length > 0 && (
-            <section className="cc-schedule" data-testid="cc-schedule">
-              <div className="sec-header">
-                <span className="sec-title">Weekend Schedule</span>
-                <span className="sec-meta mono">{focusWeekendSessions.length} sessions</span>
-              </div>
-              <div className="cc-session-strip" role="list">
-                {focusWeekendSessions.map(({ session, source, datasets }) => {
-                  const status = classifySessionStatus(session, nowDate)
-                  const isNext = nextSession?.session_key === session.session_key
-                  const isCurrent = currentSession?.session_key === session.session_key
-                  const isLive = isCurrent && liveActive
-                  return (
-                    <Link
-                      key={session.session_key}
-                      to="/race-hub"
-                      search={{ session_key: session.session_key }}
-                      className={`cc-session-card ui-card interactive cc-status-${status}${isNext ? ' is-next' : ''}${
-                        isLive ? ' is-live glass-panel' : ''
-                      }`}
-                      data-testid={`cc-session-${session.session_key}`}
-                      role="listitem"
-                    >
-                      <div className="cc-session-card-head">
-                        <span className="cc-session-abbrev mono">
-                          {sessionTypeAbbrev(session.session_type, session.session_name)}
-                        </span>
-                        <span className={`cc-session-status cc-status-pill-${status}`}>
-                          {isCurrent ? 'On track' : status === 'done' ? 'Done' : isNext ? 'Next' : 'Upcoming'}
-                        </span>
-                      </div>
-                      <div className="cc-session-name">{session.session_name}</div>
-                      <div className="cc-session-time mono">{formatSessionScheduleTime(session.date_start)}</div>
-                      <div className="cc-session-cov mono">
-                        <span className={`cc-cov-dot cc-cov-${source}`} aria-hidden="true" />
-                        {formatCoverageHint(datasets)}
-                      </div>
-                    </Link>
-                  )
-                })}
-              </div>
-            </section>
-          )}
-
-          <PaddockBriefing />
-        </div>
-      </div>
-    </div>
-  )
-}
-
-function FormSparkline({ form, color }: { form: number[], color: string }) {
-  if (!form || form.length === 0) return null
-  const max = Math.max(...form, 26) // 26 is standard max for a race win
-  const width = 45
-  const height = 14
-  const step = width / Math.max(form.length - 1, 1)
-
-  const points = form.map((val, i) => {
-    const x = i * step
-    const y = height - (val / max) * height
-    return `${x},${y}`
-  }).join(' ')
-
-  return (
-    <svg width={width} height={height} style={{ overflow: 'visible' }}>
-      <polyline
-        fill="none"
-        stroke={color}
-        strokeWidth="1.5"
-        strokeLinecap="round"
-        strokeLinejoin="round"
-        points={points}
-      />
-    </svg>
-  )
-}
-

frontend/src/pages/DataLibraryPage.tsx

@@ -11,6 +11,7 @@ import {
 import { SourceBadge, weekendStatusLabel } from '../components/SourceBadge'
 import { CliCommands, ingestYearCommands } from '../components/CliCommands'
 import { MeetingDetailPanel } from '../components/MeetingDetailPanel'
+import { RouteState } from '../components/RouteState'
 import type { Meeting, Weekend } from '../types'
 
 function formatMeetingDate(meeting: Meeting): string {
@@ -27,12 +28,12 @@ export function DataLibraryPage() {
 
   const seasonsQuery = useQuery({
     queryKey: ['seasons'],
-    queryFn: fetchSeasons,
+    queryFn: ({ signal }) => fetchSeasons(signal),
   })
 
   const meetingsQuery = useQuery({
     queryKey: ['meetings', selectedYear],
-    queryFn: () => fetchLocalMeetings(selectedYear!),
+    queryFn: ({ signal }) => fetchLocalMeetings(selectedYear!, signal),
     enabled: selectedYear != null,
   })
 
@@ -41,7 +42,7 @@ export function DataLibraryPage() {
   const weekendQueries = useQueries({
     queries: meetings.map((meeting) => ({
       queryKey: ['weekend', meeting.meeting_key],
-      queryFn: () => fetchWeekend(meeting.meeting_key),
+      queryFn: ({ signal }: { signal: AbortSignal }) => fetchWeekend(meeting.meeting_key, signal),
       enabled: meetings.length > 0,
       staleTime: 60_000,
     })),
@@ -78,13 +79,26 @@ export function DataLibraryPage() {
   const weekendsLoading = weekendQueries.some((q) => q.isLoading)
 
   if (seasonsQuery.isLoading) {
-    return <div className="page loading-state">loading local data library…</div>
+    return (
+      <div className="page">
+        <RouteState kind="loading" title="loading local data library…" testId="weekend-loading" />
+      </div>
+    )
   }
 
   if (seasonsQuery.isError) {
     return (
-      <div className="page error-box">
+      <div className="page">
-        {seasonsQuery.error instanceof Error ? seasonsQuery.error.message : 'Failed to load seasons'}
+        <RouteState
+          kind="error"
+          title="Weekend data unavailable"
+          error={seasonsQuery.error}
+          onRetry={() => {
+            if (!seasonsQuery.isFetching) void seasonsQuery.refetch()
+          }}
+          retrying={seasonsQuery.isFetching}
+          testId="weekend-error"
+        />
       </div>
     )
   }
@@ -222,15 +236,20 @@ export function DataLibraryPage() {
           </div>
 
           {meetingsQuery.isLoading && (
-            <div className="loading-state">loading meetings…</div>
+            <RouteState kind="loading" title="loading meetings…" testId="weekend-meetings-loading" />
           )}
 
           {meetingsQuery.isError && (
-            <div className="error-box">
+            <RouteState
-              {meetingsQuery.error instanceof Error
+              kind="error"
-                ? meetingsQuery.error.message
+              title="Weekend meetings unavailable"
-                : 'Failed to load meetings'}
+              error={meetingsQuery.error}
-            </div>
+              onRetry={() => {
+                if (!meetingsQuery.isFetching) void meetingsQuery.refetch()
+              }}
+              retrying={meetingsQuery.isFetching}
+              testId="weekend-error"
+            />
           )}
 
           {!meetingsQuery.isLoading && !meetingsQuery.isError && meetings.length === 0 && (
@@ -316,11 +335,16 @@ export function DataLibraryPage() {
 
               <div className="dl-detail-wrap">
                 {weekendsLoading && selectedWeekend == null && (
-                  <div className="loading-state">loading weekend details…</div>
+                  <RouteState kind="loading" title="loading weekend details…" testId="weekend-detail-loading" />
                 )}
                 {selectedWeekend && <MeetingDetailPanel weekend={selectedWeekend} />}
                 {selectedMeetingKey != null && !weekendsLoading && selectedWeekend == null && (
-                  <div className="missing-notice">Could not load weekend details.</div>
+                  <RouteState
+                    kind="empty"
+                    title="Weekend details missing"
+                    message="Could not load weekend details for this meeting."
+                    testId="weekend-detail-empty"
+                  />
                 )}
               </div>
             </div>

frontend/src/pages/DriverProfilePage.tsx

@@ -1,6 +1,8 @@
 import { useQuery } from '@tanstack/react-query'
 import { Link } from '@tanstack/react-router'
 import { fetchDriverSummary, fetchSeasons } from '../api'
+import { DataNotice, RouteState } from '../components/RouteState'
+import { noticeFromResponse, noticeMessage } from '../lib/availability'
 import { teamColor } from '../utils'
 import { countryFlag } from '../lib/gpIdentity'
 import {
@@ -26,7 +28,7 @@ export function DriverProfilePage({ driverNumber, year }: Props) {
   // seasons list is empty/unavailable the backend falls back to the current year.
   const seasonsQuery = useQuery({
     queryKey: ['seasons'],
-    queryFn: fetchSeasons,
+    queryFn: ({ signal }) => fetchSeasons(signal),
     enabled: year == null,
   })
   const resolvedYear = year ?? seasonsQuery.data?.[0]
@@ -34,39 +36,102 @@ export function DriverProfilePage({ driverNumber, year }: Props) {
 
   const summaryQuery = useQuery({
     queryKey: ['driver-summary', driverNumber, resolvedYear ?? 'latest'],
-    queryFn: () => fetchDriverSummary(driverNumber, resolvedYear),
+    queryFn: ({ signal }) => fetchDriverSummary(driverNumber, resolvedYear, signal),
     enabled: seasonsSettled && driverNumber > 0,
     staleTime: 5 * 60_000,
   })
 
   if (driverNumber <= 0) {
-    return <div className="page error-box">Invalid driver number</div>
+    return (
+      <div className="page">
+        <RouteState kind="empty" title="Invalid driver number" message="Pick a driver from the championship standings." />
+      </div>
+    )
   }
   if (!seasonsSettled || summaryQuery.isLoading) {
-    return <div className="page loading-state">loading driver profile…</div>
+    return (
+      <div className="page">
+        <RouteState kind="loading" title="loading driver profile…" testId="driver-profile-loading" />
+      </div>
+    )
   }
   if (summaryQuery.isError) {
     return (
-      <div className="page error-box">
+      <div className="page">
-        {summaryQuery.error instanceof Error
+        <RouteState
-          ? summaryQuery.error.message
+          kind="error"
-          : 'Failed to load driver profile'}
+          title="Driver profile unavailable"
+          error={summaryQuery.error}
+          onRetry={() => {
+            if (!summaryQuery.isFetching) void summaryQuery.refetch()
+          }}
+          retrying={summaryQuery.isFetching}
+          testId="driver-profile-error"
+        />
       </div>
     )
   }
   const summary = summaryQuery.data
   if (!summary) {
-    return <div className="page error-box">No driver data</div>
+    return (
+      <div className="page">
+        <RouteState
+          kind="empty"
+          title="No driver data"
+          message="This driver is not in the local season standings yet."
+        />
+      </div>
+    )
   }
-  return <DriverProfileBody summary={summary} />
+  return (
+    <DriverProfileBody
+      summary={summary}
+      availability={noticeFromResponse(summary, { includeLocal: false })}
+      onRetry={() => {
+        if (!summaryQuery.isFetching) void summaryQuery.refetch()
+      }}
+      retrying={summaryQuery.isFetching}
+    />
+  )
 }
 
-function DriverProfileBody({ summary }: { summary: DriverSummary }) {
+function DriverProfileBody({
+  summary,
+  availability,
+  onRetry,
+  retrying,
+}: {
+  summary: DriverSummary
+  availability?: ReturnType<typeof noticeFromResponse>
+  onRetry?: () => void
+  retrying?: boolean
+}) {
   const color = teamColor(summary.team_colour)
   const deltas = gridFinishDeltas(summary.rounds)
 
   return (
     <div className="dp-page" data-testid="driver-profile">
+      {summary.enrichment === 'limited' && (
+        <DataNotice
+          availability="limited"
+          message="Optional remote details are unavailable. Showing local season identity and results."
+          onRetry={onRetry}
+          retrying={retrying}
+          testId="driver-profile-limited"
+        />
+      )}
+      {summary.source === 'local' && summary.enrichment !== 'limited' && (
+        <DataNotice availability="local" message="Loaded from local season data." testId="driver-profile-local" />
+      )}
+      {availability === 'stale' && summary.enrichment !== 'limited' && (
+        <DataNotice
+          availability="stale"
+          message={noticeMessage('stale')}
+          onRetry={onRetry}
+          retrying={retrying}
+          testId="driver-profile-stale"
+        />
+      )}
       <header className="dp-header" data-testid="dp-header" style={{ borderLeftColor: color }}>
         <div className="dp-identity">
           <div className="dp-title-row">

frontend/src/pages/ExplorePage.tsx

@@ -0,0 +1,159 @@
+import { useMemo } from 'react'
+import { useQueries, useQuery } from '@tanstack/react-query'
+import { Link } from '@tanstack/react-router'
+import {
+  fetchChampionshipHub,
+  fetchLocalMeetings,
+  fetchSeasonMeetings,
+  fetchSeasons,
+  fetchWeekend,
+} from '../api'
+import { countryFlag, formatGpDateRange } from '../lib/gpIdentity'
+import { meetingHasStarted } from '../lib/schedule'
+import { teamColor } from '../utils'
+import type { Weekend } from '../types'
+import '../styles/weekend.css'
+
+function analysisKey(weekend: Weekend | undefined): number | undefined {
+  if (!weekend) return undefined
+  const race = weekend.sessions.find((s) => s.session.session_type?.toLowerCase().includes('race'))
+  return race?.session.session_key ?? weekend.default_session_key
+}
+
+export function ExplorePage() {
+  const now = useMemo(() => new Date(), [])
+
+  const seasonsQuery = useQuery({
+    queryKey: ['seasons'],
+    queryFn: ({ signal }) => fetchSeasons(signal),
+  })
+  const season = seasonsQuery.data?.[0] ?? null
+
+  const localMeetingsQuery = useQuery({
+    queryKey: ['meetings', season, 'local'],
+    queryFn: ({ signal }) => fetchLocalMeetings(season!, signal),
+    enabled: season != null,
+  })
+  const seasonMeetingsQuery = useQuery({
+    queryKey: ['season-meetings', season],
+    queryFn: ({ signal }) => fetchSeasonMeetings(season!, signal),
+    enabled: season != null,
+  })
+  const championshipQuery = useQuery({
+    queryKey: ['championship-hub', season],
+    queryFn: ({ signal }) => fetchChampionshipHub(season!, signal),
+    enabled: season != null,
+  })
+
+  const localMeetings = localMeetingsQuery.data ?? []
+  const meetings = seasonMeetingsQuery.data?.length ? seasonMeetingsQuery.data : localMeetings
+
+  const weekendQueries = useQueries({
+    queries: localMeetings.map((m) => ({
+      queryKey: ['weekend', m.meeting_key],
+      queryFn: ({ signal }: { signal: AbortSignal }) => fetchWeekend(m.meeting_key, signal),
+      enabled: localMeetings.length > 0,
+      staleTime: 60_000,
+    })),
+  })
+  const weekendsByKey = useMemo(() => {
+    const map = new Map<number, Weekend>()
+    localMeetings.forEach((m, i) => {
+      const data = weekendQueries[i]?.data
+      if (data) map.set(m.meeting_key, data)
+    })
+    return map
+  }, [localMeetings, weekendQueries])
+
+  const drivers = championshipQuery.data?.drivers ?? []
+  const activeMeetings = meetings.filter((m) => !m.is_cancelled)
+
+  if (seasonsQuery.isLoading) {
+    return <div className="wk-status" data-testid="explore-loading"><p className="wk-status-title">Loading…</p></div>
+  }
+
+  return (
+    <main className="wk-page wk-explore" data-testid="explore-page">
+      <div className="wk-eyebrow mono">Explore · {season ?? 'season'}</div>
+
+      <section className="wk-explore-section" aria-labelledby="explore-calendar-title">
+        <header className="wk-card-head">
+          <span className="wk-card-title" id="explore-calendar-title">Season races</span>
+          <span className="wk-card-link mono">{activeMeetings.length} rounds</span>
+        </header>
+        {activeMeetings.length === 0 ? (
+          <p className="wk-status-sub" data-testid="explore-calendar-empty">No season calendar available yet.</p>
+        ) : (
+          <ol className="wk-explore-grid" role="list">
+            {activeMeetings.map((meeting, index) => {
+              const weekend = weekendsByKey.get(meeting.meeting_key)
+              const target = analysisKey(weekend)
+              const done = meetingHasStarted(meeting, now)
+              const card = (
+                <>
+                  <div className="wk-explore-top mono">
+                    <span>R{String(index + 1).padStart(2, '0')}</span>
+                    <span className="wk-explore-flag">
+                      {countryFlag(meeting) || meeting.country_code}
+                    </span>
+                  </div>
+                  <div className="wk-explore-name">{meeting.meeting_name}</div>
+                  <div className="wk-explore-meta mono">{meeting.circuit_short_name || meeting.location}</div>
+                  <div className="wk-explore-meta mono">{formatGpDateRange(meeting)}</div>
+                  <span className={`wk-explore-state ${done ? 'is-done' : 'is-upcoming'}`}>
+                    {done ? 'Completed' : 'Upcoming'}
+                  </span>
+                </>
+              )
+              return (
+                <li key={meeting.meeting_key} className="wk-explore-item" role="listitem">
+                  {target ? (
+                    <Link
+                      to="/race-hub"
+                      search={{ session_key: target }}
+                      className="wk-explore-card is-link"
+                      data-testid={`explore-race-${meeting.meeting_key}`}
+                    >
+                      {card}
+                    </Link>
+                  ) : (
+                    <div className="wk-explore-card" data-testid={`explore-race-${meeting.meeting_key}`}>{card}</div>
+                  )}
+                </li>
+              )
+            })}
+          </ol>
+        )}
+      </section>
+
+      <section className="wk-explore-section" aria-labelledby="explore-drivers-title">
+        <header className="wk-card-head">
+          <span className="wk-card-title" id="explore-drivers-title">Drivers</span>
+          <Link to="/championship" className="wk-card-link">Championship →</Link>
+        </header>
+        {drivers.length === 0 ? (
+          <p className="wk-status-sub" data-testid="explore-drivers-empty">Driver data not available yet.</p>
+        ) : (
+          <ol className="wk-explore-drivers" role="list">
+            {drivers.map((d) => (
+              <li key={d.driver_number} role="listitem">
+                <Link
+                  to="/drivers/$driverNumber"
+                  params={{ driverNumber: String(d.driver_number) }}
+                  search={season ? { year: season } : {}}
+                  className="wk-driver-chip"
+                  style={{ ['--wk-team' as string]: teamColor(d.team_colour) }}
+                  data-testid={`explore-driver-${d.driver_number}`}
+                >
+                  <span className="wk-driver-pos mono">{d.position}</span>
+                  <span className="wk-driver-code">{d.name_acronym}</span>
+                  <span className="wk-driver-pts mono">{d.points}</span>
+                </Link>
+              </li>
+            ))}
+          </ol>
+        )}
+      </section>
+    </main>
+  )
+}

frontend/src/pages/LiveTimingPage.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
-import { fetchLiveState } from '../api'
+import { fetchLiveState, fetchWeekendContext } from '../api'
 import type { LivePosition, LiveStreamData } from '../types'
 import {
   loadPinnedDrivers,
@@ -17,6 +17,15 @@ import { recordGapSamples } from '../lib/gapHistory'
 import { battleNumbers, detectBattles } from '../lib/battles'
 import type { LiveEvent } from '../lib/events'
 import { appendEvents, diffSnapshots, sessionSignature } from '../lib/events'
+import {
+  allowsLiveInterpretations,
+  deriveLivePhase,
+  effectiveFeedHealth,
+  rendersSnapshot,
+  terminalSessionStatus,
+} from '../lib/liveState'
+import type { TransportHealth } from '../lib/liveState'
+import { shouldPollHandoffAnalysis } from '../components/live/LiveHandoff'
 import { SessionBanner } from '../components/live/SessionBanner'
 import { TrackStatusBanner } from '../components/live/TrackStatusBanner'
 import { TimingTower } from '../components/live/TimingTower'
@@ -26,9 +35,14 @@ import { RaceControlFeed } from '../components/live/RaceControlFeed'
 import { EventRail } from '../components/live/EventRail'
 import { TeamRadioTicker } from '../components/live/TeamRadioTicker'
 import { TyreDegPanel } from '../components/live/TyreDegPanel'
-import { Archive, Radio } from 'lucide-react'
+import { LiveHandoff } from '../components/live/LiveHandoff'
+import { DataNotice, RouteState } from '../components/RouteState'
+import { weekendContextNotice } from '../lib/availability'
+import '../styles/live-state.css'
 
-type StreamStatus = 'connecting' | 'connected' | 'disconnected' | 'error'
+/** How often to re-check weekend-context while analysis is still ingesting. */
+export const WEEKEND_CONTEXT_POLL_MS = 15_000
+const WEEKEND_CONTEXT_STALE_MS = 15_000
 
 export function LiveTimingPage() {
   const [activeSnapshot, setActiveSnapshot] = useState<LiveStreamData | null>(null)
@@ -37,31 +51,96 @@ export function LiveTimingPage() {
   const [archiveSnapshotAt, setArchiveSnapshotAt] = useState<string | null>(null)
   const [archiveMode, setArchiveMode] = useState(false)
   const [isLive, setIsLive] = useState(false)
-  const [streamStatus, setStreamStatus] = useState<StreamStatus>('connecting')
+  const [streamStatus, setStreamStatus] = useState<TransportHealth>('connecting')
   const [now, setNow] = useState(Date.now())
   const [gapHistory, setGapHistory] = useState<GapHistoryMap>({})
   const [pinned, setPinned] = useState<string[]>(() => loadPinnedDrivers())
   const [visibleSectors, setVisibleSectors] = useState<VisibleSectorState>({})
-  const [positions, setPositions] = useState<Record<string, LivePosition>>({})
+  const [, setPositions] = useState<Record<string, LivePosition>>({})
   const [events, setEvents] = useState<LiveEvent[]>([])
+  // Authoritative SSE snapshot/event receipt — distinct from non-null timing rows.
+  // An inactive `is_live:false,data:null,last_snapshot:null` event is still valid.
+  const [authoritativeSseReceived, setAuthoritativeSseReceived] = useState(false)
   const prevSnapshotRef = useRef<LiveStreamData | null>(null)
   const sessionSigRef = useRef('')
   const isLiveRef = useRef(false)
   const archiveModeRef = useRef(false)
-  const snapshot = isLive ? activeSnapshot : archiveMode ? archiveSnapshot : null
+  // Whether we ever observed this session as live — used to reason about a
+  // dropped feed vs. a session that was never live in this page session.
+  const wasLiveRef = useRef(false)
   const hasArchive = Boolean(archiveSnapshot)
 
-  const { data, isLoading, isError, error } = useQuery({
+  const {
+    data,
+    isLoading,
+    isError,
+    error,
+    refetch,
+    isFetching,
+    isFetched: liveStateFetched,
+  } = useQuery({
     queryKey: ['live-state'],
-    queryFn: fetchLiveState,
+    queryFn: ({ signal }) => fetchLiveState(signal),
     staleTime: 5_000,
   })
 
+  // A retained snapshot is only "settled" (session genuinely finished) if it
+  // carries a terminal FIA SessionStatus. Otherwise the upstream feed dropped
+  // while the session was still active and we must stay in `disconnected`.
+  const sessionEndedCleanly = terminalSessionStatus(archiveSnapshot?.SessionStatus)
+
+  // Transport health, active-session state, and archive availability are
+  // orthogonal inputs; deriveLivePhase collapses them into one UI phase.
+  const phase = deriveLivePhase({
+    transport: streamStatus,
+    isLive,
+    hasActiveSnapshot: Boolean(activeSnapshot),
+    hasArchive,
+    archiveMode,
+    sessionEndedCleanly,
+    wasLive: wasLiveRef.current,
+    stateLoaded: liveStateFetched,
+  })
+  const snapshot =
+    phase === 'archive'
+      ? archiveSnapshot
+      : isLive
+        ? activeSnapshot
+        : phase === 'disconnected'
+          ? archiveSnapshot
+          : null
+
+  // Canonical weekend context (issue #72) — the single source of truth for
+  // previous/next/default-analysis identity and temporal state. Only needed
+  // when no session is streaming; keep it idle during a live session. Poll
+  // while a completed session is still ingesting so `settling` can flip to
+  // analysis-ready without a manual refresh.
+  const contextQuery = useQuery({
+    queryKey: ['weekend-context'],
+    queryFn: ({ signal }) => fetchWeekendContext(signal),
+    enabled: !isLive,
+    staleTime: WEEKEND_CONTEXT_STALE_MS,
+    refetchInterval: (query) => {
+      // Poll until the just-finished previous_completed_session is ready — an
+      // older already-complete default_analysis_session must not stop us.
+      return shouldPollHandoffAnalysis(query.state.data) ? WEEKEND_CONTEXT_POLL_MS : false
+    },
+    refetchIntervalInBackground: false,
+  })
+  const weekendContext = contextQuery.data
+  // Context freshness belongs only on inactive/settling handoff — never relabel
+  // active FIA timing because an optional REST supplement reported stale/limited.
+  const contextAvailabilityNotice =
+    (phase === 'settling' || phase === 'inactive') && weekendContext
+      ? weekendContextNotice(weekendContext)
+      : null
+
   useEffect(() => {
     if (!data) return
     const nextLive = data.is_live && Boolean(data.data)
     setIsLive(nextLive)
     isLiveRef.current = nextLive
+    if (nextLive) wasLiveRef.current = true
     if (nextLive && data.data) {
       setActiveSnapshot(data.data)
       setArchiveMode(false)
@@ -104,6 +183,9 @@ export function LiveTimingPage() {
     events.addEventListener('snapshot', (event) => {
       const state = parseLiveStateEvent(event.data)
       if (!state || cancelled) return
+      // Valid SSE state clears a false fatal REST error even when all snapshots
+      // are null (inactive handoff) — do not require non-null timing rows.
+      setAuthoritativeSseReceived(true)
       const nextLive = state.is_live && Boolean(state.data)
       setIsLive(nextLive)
       if (nextLive && state.data) {
@@ -111,6 +193,7 @@ export function LiveTimingPage() {
           setPositions({})
         }
         isLiveRef.current = true
+        wasLiveRef.current = true
         setActiveSnapshot(state.data)
         setArchiveMode(false)
       } else {
@@ -167,6 +250,8 @@ export function LiveTimingPage() {
   }, [snapshot])
 
   const rawRows = useMemo(() => sortLiveTimingRows(snapshot), [snapshot])
+  // Final-snapshot rows for the settling handoff (independent of live rows).
+  const settlingRows = useMemo(() => sortLiveTimingRows(archiveSnapshot), [archiveSnapshot])
 
   useEffect(() => {
     if (rawRows.length === 0) {
@@ -210,68 +295,100 @@ export function LiveTimingPage() {
     setPositions(archivePositions)
   }
 
+  const handleExitArchive = () => {
+    setArchiveMode(false)
+  }
+
   const archiveTimestamp = archiveSnapshotAt ? new Date(archiveSnapshotAt) : null
   const archiveLabel =
     archiveTimestamp && !Number.isNaN(archiveTimestamp.getTime())
       ? `Archived snapshot from ${archiveTimestamp.toLocaleString()}`
       : 'Archived live timing snapshot'
 
+  const showLiveInterpretations = allowsLiveInterpretations(phase)
+  // Upstream FIA loss can leave the browser SSE open; present one coherent
+  // feed-health truth rather than "Connection lost" + "Feed healthy".
+  const feedHealth = effectiveFeedHealth(streamStatus, phase)
+
+  // Usable timing rows OR an authoritative SSE state event (including inactive
+  // null payloads) clear the fatal initial REST error. Preserve error+Retry only
+  // when neither REST nor SSE yields a valid state.
+  const hasUsableStreamData = Boolean(activeSnapshot) || Boolean(archiveSnapshot)
+  const showInitialError = isError && !hasUsableStreamData && !authoritativeSseReceived
+
   return (
-    <div className="page live-page" data-testid="live-page">
+    <div className="page live-page" data-testid="live-page" data-phase={phase}>
-      {isError && (
+      {showInitialError && (
-        <div className="error-box">
+        <RouteState
-          {error instanceof Error ? error.message : 'Failed to load live timing state'}
+          kind="error"
+          title="Live timing unavailable"
+          error={error}
+          onRetry={() => {
+            if (!isFetching) void refetch()
+          }}
+          retrying={isFetching}
+          testId="live-initial-error"
+        />
+      )}
+
+      {phase === 'disconnected' && (
+        <div className="live-status-strip live-status-warn" data-testid="live-disconnected-strip">
+          Connection lost — showing the last live data while we reconnect. This is not an archive.
         </div>
       )}
 
-      {streamStatus === 'disconnected' && snapshot && !archiveMode && (
+      {phase === 'archive' && (
-        <div className="live-status-strip live-status-warn">
-          Stream disconnected — showing last received snapshot
-        </div>
-      )}
-
-      {archiveMode && snapshot && (
         <div className="live-status-strip live-status-archive" data-testid="live-archive-strip">
-          {archiveLabel} — live updates are paused for this archive view
+          <span>{archiveLabel} — read-only, live updates are paused</span>
-        </div>
+          <button type="button" className="live-archive-exit" onClick={handleExitArchive}>
-      )}
+            Exit archive
-
-      {isLoading && !snapshot && (
-        <div className="loading-state">connecting to live timing…</div>
-      )}
-
-      {!isLoading && !snapshot && (
-        <div className="empty-state ui-card glass-panel" style={{ padding: '40px', textAlign: 'center', marginTop: '20vh', maxWidth: '400px', marginLeft: 'auto', marginRight: 'auto' }} data-testid="live-empty">
-          <div className="live-empty-status" style={{ marginBottom: '16px' }}>
-            <span className={`live-conn live-conn-${streamStatus}`}>{streamStatus}</span>
-          </div>
-          <Radio size={48} style={{ color: 'var(--text-3)', margin: '0 auto 16px auto', display: 'block' }} />
-          <h2 className="empty-state-title" style={{ fontSize: '20px', marginBottom: '8px' }}>No live session active</h2>
-          <p className="empty-state-desc" style={{ color: 'var(--text-2)' }}>
-            The telemetry feed is currently offline. <br /><br /> Check the <a href="/" style={{ color: 'var(--red)', textDecoration: 'underline' }}>Command Center</a> for the weekend schedule or explore historical data in the <a href="/race-hub" style={{ color: 'var(--red)', textDecoration: 'underline' }}>Race Hub</a>.
-          </p>
-          {hasArchive && (
-            <button type="button" className="live-archive-btn" onClick={handleViewArchive}>
-              <Archive size={15} />
-              View Last Session
           </button>
-          )}
         </div>
       )}
 
-      {snapshot && (
+      {phase === 'connecting' && (isLoading || !liveStateFetched) && !hasUsableStreamData && (
+        <RouteState
+          kind="loading"
+          title="connecting to live timing…"
+          testId="live-initial-loading"
+        />
+      )}
+
+      {(phase === 'settling' || phase === 'inactive') && !showInitialError && (
+        <>
+          {contextAvailabilityNotice && (
+            <DataNotice
+              availability={contextAvailabilityNotice}
+              testId="live-context-data-notice"
+            />
+          )}
+          <LiveHandoff
+            phase={phase}
+            transport={feedHealth}
+            context={weekendContext}
+            rows={settlingRows}
+            capturedAt={archiveSnapshotAt}
+            hasArchive={hasArchive}
+            onViewArchive={handleViewArchive}
+          />
+        </>
+      )}
+
+      {snapshot && rendersSnapshot(phase) && (
         <>
           <SessionBanner
-            isLive={isLive}
+            phase={phase}
-            isArchive={archiveMode}
             snapshot={snapshot}
             rows={rows}
-            connection={streamStatus}
+            transport={feedHealth}
             now={now}
+            capturedAt={phase === 'archive' ? archiveSnapshotAt : null}
           />
           <TrackStatusBanner status={snapshot.TrackStatus} />
           <PinnedDrivers rows={rows} history={gapHistory} pinned={pinned} onToggle={handleTogglePin} />
+          {showLiveInterpretations && (
             <TyreDegPanel rows={rows} sessionType={snapshot.Session?.SessionType} pinned={pinned} />
+          )}
           <div className="live-columns">
             <div className="live-tower-col">
               <div className="sec-header">
@@ -289,16 +406,14 @@ export function LiveTimingPage() {
                 session={snapshot.Session}
               />
             </div>
-            {/* Rail runs most-synthesized to most-raw: a reader arriving
-                mid-session wants "what did I miss" before the regulatory log. */}
             <div className="live-rc-col">
-              <EventRail events={events} driverInfo={snapshot.DriverInfo} />
               <TeamRadioTicker
                 captures={snapshot.TeamRadio ?? []}
                 driverInfo={snapshot.DriverInfo}
                 session={snapshot.Session}
               />
               <RaceControlFeed messages={snapshot.RCMessages ?? []} driverInfo={snapshot.DriverInfo} />
+              <EventRail events={events} driverInfo={snapshot.DriverInfo} />
             </div>
           </div>
         </>

frontend/src/pages/RaceHubPage.tsx

@@ -1,7 +1,8 @@
 import { useEffect, useState } from 'react'
 import { useQuery } from '@tanstack/react-query'
-import { useNavigate } from '@tanstack/react-router'
+import { Link, useNavigate } from '@tanstack/react-router'
 import { fetchRaceHub, fetchWeekend, fetchWeekendContext } from '../api'
+import { weekendFocusSearch } from '../lib/routeSearch'
 import { DatasetStrip } from '../components/DatasetStrip'
 import { RaceStoryCanvas } from '../components/RaceStoryCanvas'
 import { TabBar, type Tab } from '../components/TabBar'
@@ -12,18 +13,29 @@ import { CompareView } from '../components/CompareView'
 import { RaceControlView } from '../components/RaceControlView'
 import { WeatherView } from '../components/WeatherView'
 import { OverviewView } from '../components/OverviewView'
+import {
+  PartialAnalysisBanner,
+  PreSessionView,
+  SessionPhaseView,
+} from '../components/PreSessionView'
 import { WeekendSwitcher } from '../components/WeekendSwitcher'
 import { SourceBadge } from '../components/SourceBadge'
+import { DataNotice, RouteState } from '../components/RouteState'
+import { noticeFromResponse, noticeMessage } from '../lib/availability'
 import { countryAccent, countryDecal, formatGpDateRange } from '../lib/gpIdentity'
-import { formatCoverageHint, sessionTypeAbbrev } from '../lib/coverage'
+import { sessionTypeAbbrev } from '../lib/coverage'
+import { formatSessionScheduleTime, sortSessionsByStart } from '../lib/schedule'
 import {
-  MAX_BROWSER_TIMEOUT,
+  defaultAnalysisSessionKey,
-  formatCountdown,
+  isPartialAnalysis,
-  formatSessionScheduleTime,
+  isPreSession,
-  refreshDeadlineDelay,
+  isPreparing,
-  sortSessionsByStart,
+  isUnavailable,
-} from '../lib/schedule'
+  resolveSessionState,
-import type { ContextSession, Weekend } from '../types'
+  sessionStateDotClass,
+  sessionStateLabel,
+} from '../lib/sessionState'
+import type { WeekendSession } from '../types'
 
 interface Props {
   sessionKey: number
@@ -33,63 +45,45 @@ export function RaceHubPage({ sessionKey }: Props) {
   const navigate = useNavigate()
   const [activeTab, setActiveTab] = useState<Tab>('overview')
   const [switcherOpen, setSwitcherOpen] = useState(false)
-  const [now, setNow] = useState(() => Date.now())
+  const [showDiagnostics, setShowDiagnostics] = useState(false)
-  const [refreshGeneration, setRefreshGeneration] = useState(0)
+  const [phaseDiagnostics, setPhaseDiagnostics] = useState(false)
+  const [now, setNow] = useState(() => new Date())
+
+  // Keep schedule-adjacent UI (countdown) moving; Live/completion come from context.
+  useEffect(() => {
+    const id = window.setInterval(() => setNow(new Date()), 1000)
+    return () => window.clearInterval(id)
+  }, [])
 
-  // The server owns bare Race Hub selection so every open tab crosses the
-  // one-hour handoff at the same instant.
   const contextQuery = useQuery({
     queryKey: ['weekend-context'],
-    queryFn: fetchWeekendContext,
+    queryFn: ({ signal }) => fetchWeekendContext(signal),
-    enabled: sessionKey === 0,
+    staleTime: 15_000,
-  })
+    refetchInterval: 30_000,
-  const { refetch: refetchContext } = contextQuery
-
-  const context = contextQuery.data
-  const preSession = sessionKey === 0 && context?.race_hub_pre_session === true
-  const preSessionRef = context?.race_hub_default_session
-  const preSessionMeetingKey = preSessionRef?.meeting?.meeting_key
-  const preSessionWeekendQuery = useQuery({
-    queryKey: ['weekend', preSessionMeetingKey],
-    queryFn: () => fetchWeekend(preSessionMeetingKey!),
-    enabled: preSession && preSessionMeetingKey != null && preSessionMeetingKey > 0,
   })
+  const context = contextQuery.data ?? null
 
+  // Bare `/race-hub` resolves only through canonical Weekend Context.
   useEffect(() => {
     if (sessionKey !== 0) return
-    const delay = refreshDeadlineDelay(context?.race_hub_refresh_at)
+    if (!contextQuery.isSuccess || !context) return
-    if (delay == null) return
+    const target = defaultAnalysisSessionKey(context)
-    const rearmAfterRefetch = delay === MAX_BROWSER_TIMEOUT
+    if (target) {
-    const timer = window.setTimeout(() => {
+      navigate({ to: '/race-hub', search: { session_key: target }, replace: true })
-      void refetchContext().finally(() => {
+    }
-        if (rearmAfterRefetch) setRefreshGeneration((generation) => generation + 1)
+  }, [sessionKey, contextQuery.isSuccess, context, navigate])
-      })
-    }, delay)
-    return () => window.clearTimeout(timer)
-  }, [sessionKey, context?.race_hub_refresh_at, refetchContext, refreshGeneration])
 
-  useEffect(() => {
-    if (!preSession) return
-    const timer = window.setInterval(() => setNow(Date.now()), 1_000)
-    return () => window.clearInterval(timer)
-  }, [preSession])
-
-  // A bare route retains canonical context ownership while rendering its
-  // completed analysis selection. Explicit URLs remain user-owned.
-  const selectedSessionKey = sessionKey || context?.race_hub_default_session?.session.session_key || 0
-
-  // ─── Active session payload ───
   const raceHubQuery = useQuery({
-    queryKey: ['race-hub', selectedSessionKey],
+    queryKey: ['race-hub', sessionKey],
-    queryFn: () => fetchRaceHub(selectedSessionKey),
+    queryFn: ({ signal }) => fetchRaceHub(sessionKey, signal),
-    enabled: selectedSessionKey > 0 && (sessionKey > 0 || !preSession),
+    enabled: sessionKey > 0,
     staleTime: 30_000,
   })
 
   const meetingKey = raceHubQuery.data?.meeting?.meeting_key
   const weekendQuery = useQuery({
     queryKey: ['weekend', meetingKey],
-    queryFn: () => fetchWeekend(meetingKey!),
+    queryFn: ({ signal }) => fetchWeekend(meetingKey!, signal),
     enabled: meetingKey != null && meetingKey > 0,
     staleTime: 60_000,
   })
@@ -99,63 +93,142 @@ export function RaceHubPage({ sessionKey }: Props) {
   const accent = countryAccent(data?.meeting ?? null)
   const accentStyle = { '--gp-accent': accent } as React.CSSProperties
 
-  // ─── No session_key: resolve exclusively through canonical Weekend Context ───
+  const openDiagnostics = () => {
-  if (sessionKey === 0) {
+    setActiveTab('data_status')
-    if (contextQuery.isLoading || (preSession && preSessionWeekendQuery.isLoading)) {
+    setShowDiagnostics(true)
-      return (
+    setPhaseDiagnostics(true)
-        <div className="rh-page" style={accentStyle}>
-          <div className="loading-state">resolving latest local weekend…</div>
-        </div>
-      )
-    }
-    if (preSession && preSessionRef) {
-      return (
-        <RaceHubPreSession
-          session={preSessionRef}
-          weekend={preSessionWeekendQuery.data}
-          now={now}
-          switcherOpen={switcherOpen}
-          onToggleSwitcher={() => setSwitcherOpen((open) => !open)}
-          onCloseSwitcher={() => setSwitcherOpen(false)}
-        />
-      )
-    }
-    if (!selectedSessionKey) {
-      return (
-        <div className="rh-page rh-empty" data-testid="race-hub-empty" style={accentStyle}>
-          <div className="rh-empty-band">
-            <span className="rh-empty-eyebrow mono">box-box · race hub</span>
-            <h1 className="rh-empty-title">No completed local analysis yet</h1>
-            <p className="rh-empty-sub">
-              Race Hub opens completed local analysis between weekends. Check Data Health
-              to ingest a completed session.
-            </p>
-            <div className="rh-empty-actions">
-              <a href="/admin" className="rh-empty-action">Open Admin · Data Health</a>
-              <a href="/" className="rh-empty-action">Back to Command Center</a>
-            </div>
-          </div>
-        </div>
-      )
-    }
   }
 
-  // ─── Loading / error for the selected session ───
+  // ─── No session_key: resolve via Weekend Context ───
+  if (sessionKey === 0) {
+    if (contextQuery.isLoading) {
+      return (
+        <div className="rh-page" style={accentStyle}>
+          <RouteState
+            kind="loading"
+            title="resolving weekend context…"
+            testId="race-hub-loading"
+          />
+        </div>
+      )
+    }
+    if (contextQuery.isError) {
+      return (
+        <div className="rh-page" data-testid="race-hub-error" style={accentStyle}>
+          <RouteState
+            kind="error"
+            title="Weekend unavailable"
+            error={contextQuery.error}
+            onRetry={() => {
+              if (!contextQuery.isFetching) void contextQuery.refetch()
+            }}
+            retrying={contextQuery.isFetching}
+            retryTestId="rh-retry"
+          >
+            <div className="rh-recover-actions">
+              <Link to="/" search={{}} className="rh-recover-btn" data-testid="rh-back-weekend">
+                Back to Weekend
+              </Link>
+            </div>
+          </RouteState>
+        </div>
+      )
+    }
+
+    if (context && !defaultAnalysisSessionKey(context)) {
+      return (
+        <div className="rh-page rh-empty" data-testid="race-hub-no-analysis" style={accentStyle}>
+          <div className="rh-empty-band">
+            <span className="rh-empty-eyebrow mono">box-box · race hub</span>
+            <h1 className="rh-empty-title">No completed session to analyse yet</h1>
+            <p className="rh-empty-sub">
+              Weekend Context has no default analysis session. Pick a past session
+              to review, or check back once a session completes with local analysis.
+            </p>
+            <div className="rh-empty-actions">
+              <button
+                type="button"
+                className="rh-empty-action"
+                onClick={() => setSwitcherOpen(true)}
+              >
+                Browse Weekends
+              </button>
+              <Link to="/" search={{}} className="rh-empty-action" data-testid="rh-back-weekend">
+                Back to Weekend
+              </Link>
+            </div>
+          </div>
+          {switcherOpen && (
+            <WeekendSwitcher
+              currentMeetingKey={context.focus_meeting?.meeting_key}
+              context={context}
+              now={now}
+              onClose={() => setSwitcherOpen(false)}
+            />
+          )}
+        </div>
+      )
+    }
+
+    return (
+      <div className="rh-page" style={accentStyle}>
+        <RouteState
+          kind="loading"
+          title="resolving weekend context…"
+          testId="race-hub-loading"
+        />
+      </div>
+    )
+  }
+
+  // ─── Loading / error for the requested session_key ───
   if (raceHubQuery.isLoading) {
     return (
       <div className="rh-page" style={accentStyle}>
-        <div className="loading-state">loading session {selectedSessionKey}…</div>
+        <RouteState
+          kind="loading"
+          title={`loading session ${sessionKey}…`}
+          testId="race-hub-loading"
+        />
       </div>
     )
   }
   if (raceHubQuery.isError || !data) {
+    const backMeeting =
+      context?.focus_meeting?.meeting_key ??
+      context?.previous_completed_session?.meeting?.meeting_key
+    const backSearch = weekendFocusSearch(backMeeting, sessionKey)
+
     return (
-      <div className="rh-page" style={accentStyle}>
+      <div className="rh-page" data-testid="race-hub-error" style={accentStyle}>
-        <div className="error-box">
+        <RouteState
-          {raceHubQuery.error instanceof Error
+          kind="error"
-            ? raceHubQuery.error.message
+          title="Session unavailable"
-            : `Failed to load session ${selectedSessionKey}.`}
+          error={raceHubQuery.error}
+          message={
+            raceHubQuery.error
+              ? undefined
+              : `Session ${sessionKey} could not be loaded from local data.`
+          }
+          onRetry={() => {
+            if (!raceHubQuery.isFetching) void raceHubQuery.refetch()
+          }}
+          retrying={raceHubQuery.isFetching}
+          retryTestId="rh-retry"
+        >
+          <div className="rh-recover-actions">
+            <Link
+              to="/"
+              search={backSearch}
+              className="rh-recover-btn"
+              data-testid="rh-back-weekend"
+              data-meeting-key={backMeeting ?? undefined}
+              data-session-key={sessionKey}
+            >
+              Back to Weekend
+            </Link>
           </div>
+        </RouteState>
       </div>
     )
   }
@@ -165,12 +238,35 @@ export function RaceHubPage({ sessionKey }: Props) {
   const sessionMeta = weekend
     ? Object.fromEntries(weekend.sessions.map((w) => [w.session.session_key, w]))
     : {}
-  const activeSessionMeta = sessionMeta[selectedSessionKey]
+  const activeSessionMeta: WeekendSession | undefined = sessionMeta[sessionKey]
+  const activeState = resolveSessionState({
+    weekendSession: activeSessionMeta,
+    context,
+    now,
+  })
+  const preSession = isPreSession(activeState)
+  const preparing = isPreparing(activeState)
+  const unavailable = isUnavailable(activeState)
+  const partial = isPartialAnalysis(activeState)
+  // Distinct stale disclosure from response headers — skip routine local (already
+  // covered by SourceBadge) and skip partial when the readiness banner is shown.
+  const freshnessNotice = noticeFromResponse(data, { includeLocal: false })
+  const showFreshnessNotice =
+    freshnessNotice != null && !(partial && freshnessNotice === 'partial')
 
   return (
     <div className="rh-page" data-testid="race-hub" style={accentStyle}>
-      {/* Topbar */}
       <div className="rh-topbar">
+        <Link
+          to="/"
+          search={weekendFocusSearch(meetingKey, sessionKey)}
+          className="rh-back-weekend"
+          data-testid="rh-back-weekend"
+          data-meeting-key={meetingKey ?? undefined}
+          data-session-key={sessionKey}
+        >
+          Back to Weekend
+        </Link>
         <span className="rh-topbar-label mono">
           box-box · race hub
           {data.meeting?.year ? ` · ${data.meeting.year}` : ''}
@@ -188,15 +284,28 @@ export function RaceHubPage({ sessionKey }: Props) {
         </button>
       </div>
 
+      {showFreshnessNotice && freshnessNotice && (
+        <DataNotice
+          availability={freshnessNotice}
+          message={noticeMessage(freshnessNotice)}
+          onRetry={() => {
+            if (!raceHubQuery.isFetching) void raceHubQuery.refetch()
+          }}
+          retrying={raceHubQuery.isFetching}
+          testId="race-hub-data-notice"
+        />
+      )}
+
       {switcherOpen && (
         <WeekendSwitcher
           currentMeetingKey={meetingKey}
-          currentSessionKey={selectedSessionKey}
+          currentSessionKey={sessionKey}
+          context={context}
+          now={now}
           onClose={() => setSwitcherOpen(false)}
         />
       )}
 
-      {/* GP Identity band */}
       {data.meeting && (
         <section className="rh-identity" data-testid="rh-identity">
           <div className="rh-identity-accent" aria-hidden="true" />
@@ -217,12 +326,16 @@ export function RaceHubPage({ sessionKey }: Props) {
         </section>
       )}
 
-      {/* Session rail */}
       {sessions.length > 0 && (
         <nav className="rh-session-rail" aria-label="Weekend sessions" data-testid="rh-session-rail">
           {sessions.map((session) => {
             const meta = sessionMeta[session.session_key]
-            const active = session.session_key === selectedSessionKey
+            const active = session.session_key === sessionKey
+            const state = resolveSessionState({
+              weekendSession: meta,
+              context,
+              now,
+            })
             return (
               <button
                 key={session.session_key}
@@ -244,43 +357,70 @@ export function RaceHubPage({ sessionKey }: Props) {
                 <span className="rh-session-time mono">
                   {formatSessionScheduleTime(session.date_start)}
                 </span>
-                {meta && (
                 <span className="rh-session-cov mono">
                   <span
-                      className={`cc-cov-dot cc-cov-${meta.source}`}
+                    className={`cc-cov-dot ${sessionStateDotClass(state)}`}
                     aria-hidden="true"
                   />
-                    {formatCoverageHint(meta.datasets)}
+                  {sessionStateLabel(state)}
                 </span>
-                )}
               </button>
             )
           })}
         </nav>
       )}
 
-      {/* Active session sub-bar */}
       {data.session && (
         <div className="rh-active-bar" data-testid="rh-active-bar">
           <span className="rh-active-name">{data.session.session_name}</span>
           <span className="rh-active-meta mono">
             {formatSessionScheduleTime(data.session.date_start)}
           </span>
-          {activeSessionMeta && (
+          <span className="rh-active-cov mono" data-testid="rh-active-state">
-            <span className="rh-active-cov mono">
             <span
-                className={`cc-cov-dot cc-cov-${activeSessionMeta.source}`}
+              className={`cc-cov-dot ${sessionStateDotClass(activeState)}`}
               aria-hidden="true"
             />
-              {formatCoverageHint(activeSessionMeta.datasets)} datasets local
+            {sessionStateLabel(activeState)}
           </span>
-          )}
+          <span className="rh-active-key mono">key {sessionKey}</span>
-          <span className="rh-active-key mono">key {selectedSessionKey}</span>
         </div>
       )}
 
+      {preSession && data.session ? (
+        <PreSessionView
+          session={data.session}
+          sessionName={data.session.session_name}
+          now={now}
+        />
+      ) : preparing || unavailable ? (
+        <>
+          <SessionPhaseView
+            state={
+              unavailable
+                ? activeState === 'cancelled'
+                  ? 'cancelled'
+                  : 'unavailable'
+                : 'preparing'
+            }
+            sessionName={data.session?.session_name ?? `Session ${sessionKey}`}
+            onOpenDiagnostics={openDiagnostics}
+          />
+          {phaseDiagnostics && (
+            <div className="data-section" data-testid="rh-phase-diagnostics">
+              <div className="sec-header">
+                <span className="sec-title">Diagnostics</span>
+              </div>
+              <DatasetStatusView datasets={data.datasets} />
+              <div style={{ marginTop: 'var(--s5)' }} data-testid="rh-dataset-strip">
                 <DatasetStrip datasets={data.datasets} />
-
+              </div>
+            </div>
+          )}
+        </>
+      ) : (
+        <>
+          {partial && <PartialAnalysisBanner onOpenDiagnostics={openDiagnostics} />}
           <TabBar active={activeTab} onChange={setActiveTab} />
 
           {activeTab === 'overview' && <OverviewView data={data} />}
@@ -311,7 +451,7 @@ export function RaceHubPage({ sessionKey }: Props) {
                 <span className="sec-title">Driver Compare</span>
               </div>
               <CompareView
-            sessionKey={selectedSessionKey}
+                sessionKey={sessionKey}
                 results={data.results}
                 drivers={data.drivers}
               />
@@ -357,80 +497,27 @@ export function RaceHubPage({ sessionKey }: Props) {
           {activeTab === 'data_status' && (
             <div className="data-section">
               <div className="sec-header">
-            <span className="sec-title">Data Status</span>
+                <span className="sec-title">Diagnostics</span>
-          </div>
-          <DatasetStatusView datasets={data.datasets} />
-        </div>
-      )}
-    </div>
-  )
-}
-
-function RaceHubPreSession({
-  session,
-  weekend,
-  now,
-  switcherOpen,
-  onToggleSwitcher,
-  onCloseSwitcher,
-}: {
-  session: ContextSession
-  weekend?: Weekend
-  now: number
-  switcherOpen: boolean
-  onToggleSwitcher: () => void
-  onCloseSwitcher: () => void
-}) {
-  const meeting = session.meeting
-  const sessions = sortSessionsByStart((weekend?.sessions ?? []).map((entry) => entry.session))
-  const target = new Date(session.session.date_start)
-  const accent = countryAccent(meeting ?? null)
-  const pendingLiveEvidence = target.getTime() <= now
-
-  return (
-    <div className="rh-page rh-empty" data-testid="race-hub-pre-session" style={{ '--gp-accent': accent } as React.CSSProperties}>
-      <div className="rh-topbar">
-        <span className="rh-topbar-label mono">box-box · race hub</span>
-        <span className="rh-topbar-spacer" />
                 <button
                   type="button"
-          className={`rh-switcher-toggle${switcherOpen ? ' active' : ''}`}
+                  className={`rh-diagnostics-toggle${showDiagnostics ? ' active' : ''}`}
-          onClick={onToggleSwitcher}
+                  onClick={() => setShowDiagnostics((v) => !v)}
-          aria-expanded={switcherOpen}
+                  aria-expanded={showDiagnostics}
-          aria-controls="rh-weekend-switcher"
+                  data-testid="rh-diagnostics-toggle"
-          data-testid="rh-switch-weekend"
                 >
-          {switcherOpen ? 'Close' : 'Switch Weekend'}
+                  {showDiagnostics ? 'Hide dataset coverage' : 'Show dataset coverage'}
                 </button>
               </div>
-
+              <DatasetStatusView datasets={data.datasets} />
-      {switcherOpen && (
+              {showDiagnostics && (
-        <WeekendSwitcher
+                <div style={{ marginTop: 'var(--s5)' }} data-testid="rh-dataset-strip">
-          currentMeetingKey={meeting?.meeting_key}
+                  <DatasetStrip datasets={data.datasets} />
-          currentSessionKey={session.session.session_key}
-          onClose={onCloseSwitcher}
-        />
-      )}
-
-      <section className="rh-empty-band">
-        <span className="rh-empty-eyebrow mono">box-box · race hub</span>
-        <h1 className="rh-empty-title">{meeting?.meeting_name ?? 'Next race weekend'}</h1>
-        <p className="rh-empty-sub">
-          {pendingLiveEvidence
-            ? `${session.session.session_name} is scheduled; awaiting live timing.`
-            : <>{session.session.session_name} begins in <span className="mono">{formatCountdown(target, new Date(now))}</span></>}
-        </p>
-        {sessions.length > 0 && (
-          <div className="preview-schedule" data-testid="rh-pre-session-schedule">
-            {sessions.map((scheduled) => (
-              <div key={scheduled.session_key} className="preview-schedule-item">
-                <span className="preview-schedule-name">{scheduled.session_name}</span>
-                <span className="preview-schedule-time">{formatSessionScheduleTime(scheduled.date_start)}</span>
-              </div>
-            ))}
                 </div>
               )}
-      </section>
+            </div>
+          )}
+        </>
+      )}
     </div>
   )
 }

frontend/src/pages/RacePreviewPage.tsx

@@ -9,6 +9,15 @@ import {
   fetchStartingGrid,
   fetchTrackOutline,
 } from '../api'
+import { DataNotice, RouteState } from '../components/RouteState'
+import {
+  aggregateNotices,
+  noticeFromResponse,
+  noticeMessage,
+  shouldShowEmbeddedNotice,
+  type DataAvailability,
+} from '../lib/availability'
+import { userFacingError } from '../lib/fetch'
 import { countryAccent, countryFlag, formatGpDateRange } from '../lib/gpIdentity'
 import {
   buildTitleFightContext,
@@ -37,7 +46,7 @@ function SectionState({
   children,
 }: {
   loading?: boolean
-  error?: Error | null
+  error?: unknown
   empty?: boolean
   emptyMessage?: string
   children: ReactNode
@@ -47,8 +56,8 @@ function SectionState({
   }
   if (error) {
     return (
-      <div className="preview-section-state error">
+      <div className="preview-section-state error" role="status">
-        {error instanceof Error ? error.message : 'Failed to load'}
+        {userFacingError(error)}
       </div>
     )
   }
@@ -66,7 +75,7 @@ function TrackOutlineCard({
 }: {
   outline: TrackOutline | null | undefined
   loading: boolean
-  error: Error | null
+  error: unknown
   accent: string
 }) {
   const outlinePath = useMemo(() => buildOutlinePath(outline?.points ?? []), [outline])
@@ -101,7 +110,7 @@ function LastYearCard({
 }: {
   year: number | null
   loading: boolean
-  error: Error | null
+  error: unknown
   podium: ReturnType<typeof extractPodium>
   pole: ReturnType<typeof extractPole>
   isFirstTime: boolean
@@ -150,7 +159,7 @@ function TitleFightCard({
   season,
 }: {
   loading: boolean
-  error: Error | null
+  error: unknown
   drivers: ReturnType<typeof buildTitleFightContext>
   sprintWeekend: boolean
   season: number | null
@@ -259,7 +268,29 @@ function PreviewHeader({
   )
 }
 
-export function RacePreviewPage() {
+export interface RacePreviewPageProps {
+  /**
+   * Canonical meeting identity from Weekend Context. When set, Preview must not
+   * independently re-select another current meeting/session.
+   */
+  meeting?: Meeting
+  /** Season for championship supplement; defaults to meeting.year. */
+  season?: number
+  /** Embedded under Weekend — identity failures stay non-blocking. */
+  embedded?: boolean
+  /**
+   * Availability already disclosed by the Weekend shell. Embedded Preview
+   * suppresses only an equivalent notice kind; distinct truth stays visible.
+   */
+  shellAvailability?: DataAvailability | null
+}
+
+export function RacePreviewPage({
+  meeting: canonicalMeeting,
+  season: canonicalSeason,
+  embedded = false,
+  shellAvailability = null,
+}: RacePreviewPageProps = {}) {
   const [now, setNow] = useState(() => Date.now())
 
   useEffect(() => {
@@ -268,28 +299,34 @@ export function RacePreviewPage() {
   }, [])
 
   const nowDate = useMemo(() => new Date(now), [now])
+  const hasCanonicalMeeting = canonicalMeeting != null && canonicalMeeting.meeting_key > 0
 
   const seasonsQuery = useQuery({
     queryKey: ['seasons'],
-    queryFn: fetchSeasons,
+    queryFn: ({ signal }) => fetchSeasons(signal),
+    enabled: !hasCanonicalMeeting,
   })
 
-  const latestSeason = seasonsQuery.data?.[0] ?? null
+  const latestSeason =
+    canonicalSeason ??
+    canonicalMeeting?.year ??
+    seasonsQuery.data?.[0] ??
+    null
 
   const meetingsQuery = useQuery({
     queryKey: ['meetings', latestSeason, 'auto'],
-    queryFn: () => fetchMeetings(latestSeason!, 'auto'),
+    queryFn: ({ signal }) => fetchMeetings(latestSeason!, 'auto', signal),
-    enabled: latestSeason != null,
+    enabled: !hasCanonicalMeeting && latestSeason != null,
   })
 
-  const previewMeeting = useMemo(
+  const previewMeeting = useMemo(() => {
-    () => pickPreviewMeeting(meetingsQuery.data ?? [], nowDate),
+    if (hasCanonicalMeeting) return canonicalMeeting
-    [meetingsQuery.data, nowDate],
+    return pickPreviewMeeting(meetingsQuery.data ?? [], nowDate)
-  )
+  }, [hasCanonicalMeeting, canonicalMeeting, meetingsQuery.data, nowDate])
 
   const sessionsQuery = useQuery({
     queryKey: ['sessions', previewMeeting?.meeting_key, 'auto'],
-    queryFn: () => fetchSessions(previewMeeting!.meeting_key, 'auto'),
+    queryFn: ({ signal }) => fetchSessions(previewMeeting!.meeting_key, 'auto', signal),
     enabled: previewMeeting != null,
   })
 
@@ -305,7 +342,7 @@ export function RacePreviewPage() {
 
   const priorMeetingsQuery = useQuery({
     queryKey: ['meetings', priorYear, 'auto'],
-    queryFn: () => fetchMeetings(priorYear!, 'auto'),
+    queryFn: ({ signal }) => fetchMeetings(priorYear!, 'auto', signal),
     enabled: priorYear != null && previewMeeting != null,
   })
 
@@ -316,7 +353,7 @@ export function RacePreviewPage() {
 
   const priorSessionsQuery = useQuery({
     queryKey: ['sessions', priorMeeting?.meeting_key, 'auto'],
-    queryFn: () => fetchSessions(priorMeeting!.meeting_key, 'auto'),
+    queryFn: ({ signal }) => fetchSessions(priorMeeting!.meeting_key, 'auto', signal),
     enabled: priorMeeting != null,
   })
 
@@ -327,25 +364,25 @@ export function RacePreviewPage() {
 
   const priorResultsQuery = useQuery({
     queryKey: ['results', priorRaceSession?.session_key, 'auto'],
-    queryFn: () => fetchResults(priorRaceSession!.session_key, 'auto'),
+    queryFn: ({ signal }) => fetchResults(priorRaceSession!.session_key, 'auto', signal),
     enabled: priorRaceSession != null,
   })
 
   const priorGridQuery = useQuery({
     queryKey: ['grid', priorRaceSession?.session_key, 'auto'],
-    queryFn: () => fetchStartingGrid(priorRaceSession!.session_key, 'auto'),
+    queryFn: ({ signal }) => fetchStartingGrid(priorRaceSession!.session_key, 'auto', signal),
     enabled: priorRaceSession != null,
   })
 
   const trackOutlineQuery = useQuery({
     queryKey: ['track-outline', previewMeeting?.circuit_key, previewMeeting?.year],
-    queryFn: () => fetchTrackOutline(previewMeeting!.circuit_key!, previewMeeting!.year),
+    queryFn: ({ signal }) => fetchTrackOutline(previewMeeting!.circuit_key!, previewMeeting!.year, signal),
     enabled: previewMeeting?.circuit_key != null && previewMeeting.circuit_key > 0,
   })
 
   const championshipQuery = useQuery({
     queryKey: ['championship-hub', latestSeason],
-    queryFn: () => fetchChampionshipHub(latestSeason!),
+    queryFn: ({ signal }) => fetchChampionshipHub(latestSeason!, signal),
     enabled: latestSeason != null,
   })
 
@@ -359,15 +396,56 @@ export function RacePreviewPage() {
   const accent = countryAccent(previewMeeting)
   const isFirstTimeCircuit = priorMeeting == null && priorYear != null && !priorMeetingsQuery.isLoading
 
-  if (seasonsQuery.isLoading || meetingsQuery.isLoading) {
+  const identityLoading = !hasCanonicalMeeting && (seasonsQuery.isLoading || meetingsQuery.isLoading)
-    return <div className="page loading-state" data-testid="preview-loading">loading preview…</div>
+  const identityError = !hasCanonicalMeeting && (seasonsQuery.isError || meetingsQuery.isError)
+  const identityRetrying = seasonsQuery.isFetching || meetingsQuery.isFetching
+
+  const retryIdentity = () => {
+    if (seasonsQuery.isError && !seasonsQuery.isFetching) void seasonsQuery.refetch()
+    if (meetingsQuery.isError && !meetingsQuery.isFetching) void meetingsQuery.refetch()
   }
 
-  if (seasonsQuery.isError || meetingsQuery.isError) {
+  // Worst reported truth across primary + supplements — Local must not mask
+  // Sessions/Prior Results Stale/Partial/Limited/Archive.
+  const dataNotice = aggregateNotices([
+    noticeFromResponse(championshipQuery.data, { includeLocal: true }),
+    noticeFromResponse(sessionsQuery.data, { includeLocal: false }),
+    noticeFromResponse(priorResultsQuery.data, { includeLocal: false }),
+  ])
+
+  const showFreshnessNotice =
+    Boolean(dataNotice) &&
+    (!embedded || shouldShowEmbeddedNotice(dataNotice, shellAvailability))
+
+  const sessionsFailed = sessionsQuery.isError
+  const sessionsRetrying = sessionsQuery.isFetching
+
+  const retrySessions = () => {
+    if (!sessionsQuery.isFetching) void sessionsQuery.refetch()
+  }
+
+  if (identityLoading) {
+    return (
+      <div className={embedded ? 'preview-embedded' : 'page'} data-testid="preview-loading">
+        <RouteState kind="loading" title="loading preview…" />
+      </div>
+    )
+  }
+
+  if (identityError) {
     const err = seasonsQuery.error ?? meetingsQuery.error
     return (
-      <div className="page error-box" data-testid="preview-error">
+      <div className={embedded ? 'preview-embedded' : 'page'} data-testid="preview-error">
-        {err instanceof Error ? err.message : 'Failed to load preview'}
+        <RouteState
+          kind="error"
+          title="Preview details unavailable"
+          error={err}
+          onRetry={() => {
+            if (!identityRetrying) retryIdentity()
+          }}
+          retrying={identityRetrying}
+          retryTestId="preview-retry"
+        />
       </div>
     )
   }
@@ -386,7 +464,7 @@ export function RacePreviewPage() {
         {titleFight.length > 0 && (
           <TitleFightCard
             loading={championshipQuery.isLoading}
-            error={championshipQuery.isError ? (championshipQuery.error as Error) : null}
+            error={championshipQuery.isError ? championshipQuery.error : null}
             drivers={titleFight}
             sprintWeekend={false}
             season={latestSeason}
@@ -397,7 +475,34 @@ export function RacePreviewPage() {
   }
 
   return (
-    <div className="preview-page" data-testid="preview-page">
+    <div
+      className="preview-page"
+      data-testid="preview-page"
+      data-meeting-key={previewMeeting.meeting_key}
+      data-embedded={embedded ? 'true' : undefined}
+    >
+      {showFreshnessNotice && dataNotice && (
+        <DataNotice
+          availability={dataNotice}
+          message={noticeMessage(dataNotice)}
+          testId="preview-data-notice"
+        />
+      )}
+
+      {sessionsFailed && (
+        <RouteState
+          kind="error"
+          title="Session schedule unavailable"
+          error={sessionsQuery.error}
+          onRetry={retrySessions}
+          retrying={sessionsRetrying}
+          testId="preview-sessions-error"
+          retryTestId="preview-sessions-retry"
+        />
+      )}
+
+      {/* Embedded Weekend already shows the canonical countdown header — skip the duplicate. */}
+      {!embedded && (
         <PreviewHeader
           meeting={previewMeeting}
           sessions={sessions}
@@ -405,12 +510,27 @@ export function RacePreviewPage() {
           now={nowDate}
           accent={accent}
         />
+      )}
+
+      {/* Embedded: still surface recovered schedule once sessions load. */}
+      {embedded && sessions.length > 0 && (
+        <div className="preview-schedule" data-testid="preview-schedule">
+          {sessions.map((session) => (
+            <div key={session.session_key} className="preview-schedule-item">
+              <span className="preview-schedule-name">{session.session_name}</span>
+              <span className="preview-schedule-time">
+                {formatSessionScheduleTime(session.date_start)}
+              </span>
+            </div>
+          ))}
+        </div>
+      )}
 
       <div className="preview-grid">
         <TrackOutlineCard
           outline={trackOutlineQuery.data}
           loading={trackOutlineQuery.isLoading}
-          error={trackOutlineQuery.isError ? (trackOutlineQuery.error as Error) : null}
+          error={trackOutlineQuery.isError ? trackOutlineQuery.error : null}
           accent={accent}
         />
 
@@ -419,9 +539,9 @@ export function RacePreviewPage() {
           loading={priorMeetingsQuery.isLoading || priorSessionsQuery.isLoading || priorResultsQuery.isLoading}
           error={
             priorMeetingsQuery.isError
-              ? (priorMeetingsQuery.error as Error)
+              ? priorMeetingsQuery.error
               : priorResultsQuery.isError
-                ? (priorResultsQuery.error as Error)
+                ? priorResultsQuery.error
                 : null
           }
           podium={podium}
@@ -432,7 +552,7 @@ export function RacePreviewPage() {
 
       <TitleFightCard
         loading={championshipQuery.isLoading}
-        error={championshipQuery.isError ? (championshipQuery.error as Error) : null}
+        error={championshipQuery.isError ? championshipQuery.error : null}
         drivers={titleFight}
         sprintWeekend={sprintWeekend}
         season={latestSeason}

frontend/src/pages/WeekendPage.tsx

@@ -0,0 +1,180 @@
+import { useWeekendContext } from '../hooks/useWeekendContext'
+import { BetweenRacesView } from '../components/weekend/BetweenRacesView'
+import { BetweenSessionsView } from '../components/weekend/BetweenSessionsView'
+import { LiveHandoffView } from '../components/weekend/LiveHandoffView'
+import { PreSessionView } from '../components/weekend/PreSessionView'
+import { WeekendError, WeekendLimited, WeekendLoading } from '../components/weekend/StatusViews'
+import { WeekendFocusBanner } from '../components/weekend/WeekendFocusBanner'
+import { DataNotice } from '../components/RouteState'
+import { noticeMessage, type DataAvailability } from '../lib/availability'
+import { resolveViewState } from '../lib/weekendContext'
+import type {
+  WeekendBriefingItem,
+  WeekendChampionshipImpact,
+  WeekendContext,
+  WeekendViewState,
+} from '../types'
+import '../styles/weekend.css'
+
+interface RenderArgs {
+  context: WeekendContext
+  now: Date
+  championship?: WeekendChampionshipImpact
+  briefing: WeekendBriefingItem[]
+  /** When true (the /preview alias), foreground the preparation surface. */
+  preview: boolean
+  /** Availability already disclosed by the Weekend shell (for Preview dedupe). */
+  shellAvailability: DataAvailability | null
+}
+
+function renderState(view: WeekendViewState, args: RenderArgs) {
+  const { context, now, championship, briefing, preview, shellAvailability } = args
+  // The /preview alias always resolves to the preparation surface as long as
+  // there is a next event to prepare for, regardless of the temporal state. This
+  // keeps saved /preview links and the "Prepare for …" CTA meaningful instead of
+  // redirecting straight back to the same between-races screen.
+  if (preview && context.next_meeting) {
+    return <PreSessionView context={context} now={now} shellAvailability={shellAvailability} />
+  }
+
+  switch (view) {
+    case 'no_season':
+      return <WeekendLimited season={context.season} />
+    case 'between_weekends':
+    case 'post_weekend':
+    case 'season_complete':
+      return (
+        <BetweenRacesView
+          context={context}
+          now={now}
+          view={view}
+          championship={championship}
+          briefing={briefing}
+        />
+      )
+    case 'between_sessions':
+    case 'session_settling':
+      return <BetweenSessionsView context={context} now={now} view={view} briefing={briefing} />
+    case 'session_live':
+      return <LiveHandoffView context={context} />
+    case 'pre_session':
+      return <PreSessionView context={context} now={now} shellAvailability={shellAvailability} />
+    default:
+      return <WeekendLimited season={context.season} />
+  }
+}
+
+function WeekendAvailabilityNotices({
+  availabilityNotice,
+  supplementsLimited,
+  onRetry,
+  retrying,
+}: {
+  availabilityNotice: DataAvailability | null
+  supplementsLimited: boolean
+  onRetry: () => void
+  retrying: boolean
+}) {
+  // Prefer a single reported freshness notice; Limited for failed supplements
+  // only when freshness itself is not already disclosing a stronger state.
+  if (availabilityNotice) {
+    return (
+      <DataNotice
+        availability={availabilityNotice}
+        message={noticeMessage(availabilityNotice)}
+        onRetry={onRetry}
+        retrying={retrying}
+        testId="weekend-data-notice"
+      />
+    )
+  }
+  if (supplementsLimited) {
+    return (
+      <DataNotice
+        availability="limited"
+        message="Championship or briefing supplements are unavailable. Weekend schedule context is still shown."
+        onRetry={onRetry}
+        retrying={retrying}
+        testId="weekend-data-notice"
+      />
+    )
+  }
+  return null
+}
+
+export function WeekendPage({
+  preview = false,
+  focusMeetingKey,
+  focusSessionKey,
+}: {
+  preview?: boolean
+  /** Restored from `/?meeting_key=` when returning from Race Hub analysis. */
+  focusMeetingKey?: number
+  /** Restored from `/?session_key=` when returning from Race Hub analysis. */
+  focusSessionKey?: number
+}) {
+  const {
+    context,
+    loadState,
+    error,
+    championship,
+    briefing,
+    availabilityNotice,
+    supplementsLimited,
+    now,
+    refetch,
+    isFetching,
+  } = useWeekendContext()
+  const hasFocus =
+    (focusMeetingKey != null && focusMeetingKey > 0) ||
+    (focusSessionKey != null && focusSessionKey > 0)
+
+  if (loadState === 'loading') {
+    return (
+      <main className="wk-page" data-testid="weekend-page" data-state="loading">
+        <WeekendLoading />
+      </main>
+    )
+  }
+
+  if (loadState === 'error' || context == null) {
+    return (
+      <main className="wk-page" data-testid="weekend-page" data-state="error">
+        <WeekendError error={error} onRetry={refetch} retrying={isFetching} />
+      </main>
+    )
+  }
+
+  const view = resolveViewState(context)
+  const shellAvailability = availabilityNotice ?? (supplementsLimited ? 'limited' : null)
+
+  return (
+    <main
+      className="wk-page"
+      data-testid="weekend-page"
+      data-state={view}
+      data-temporal-state={context.temporal_state}
+      data-preview={preview ? 'true' : undefined}
+      data-meeting-key={focusMeetingKey ?? undefined}
+      data-session-key={focusSessionKey ?? undefined}
+    >
+      {hasFocus && (
+        <WeekendFocusBanner meetingKey={focusMeetingKey} sessionKey={focusSessionKey} />
+      )}
+      <WeekendAvailabilityNotices
+        availabilityNotice={availabilityNotice}
+        supplementsLimited={supplementsLimited}
+        onRetry={refetch}
+        retrying={isFetching}
+      />
+      {renderState(view, {
+        context,
+        now,
+        championship,
+        briefing,
+        preview,
+        shellAvailability,
+      })}
+    </main>
+  )
+}

frontend/src/router.tsx

@@ -1,17 +1,14 @@
 import { createRootRoute, createRoute, createRouter, Outlet } from '@tanstack/react-router'
 import { Nav } from './components/Nav'
-import { CommandCenterPage } from './pages/CommandCenterPage'
+import { WeekendPage } from './pages/WeekendPage'
+import { ExplorePage } from './pages/ExplorePage'
 import { RaceHubPage } from './pages/RaceHubPage'
 import { DataLibraryPage } from './pages/DataLibraryPage'
 import { LiveTimingPage } from './pages/LiveTimingPage'
 import { BriefingPage } from './pages/BriefingPage'
 import { ChampionshipPage } from './pages/ChampionshipPage'
 import { DriverProfilePage } from './pages/DriverProfilePage'
-import { RacePreviewPage } from './pages/RacePreviewPage'
+import { parseRaceHubSearch, parseWeekendSearch } from './lib/routeSearch'
-
-type RaceHubSearch = {
-  session_key?: number
-}
 
 type DriverProfileSearch = {
   year?: number
@@ -26,19 +23,31 @@ const rootRoute = createRootRoute({
   ),
 })
 
-export const commandCenterRoute = createRoute({
+// Weekend is the adaptive home. `/` renders the current temporal state.
+// Optional meeting_key/session_key search restores Race Hub return context
+// (deep-linkable, reload-safe — no hidden component memory).
+export const weekendRoute = createRoute({
   getParentRoute: () => rootRoute,
   path: '/',
-  component: CommandCenterPage,
+  validateSearch: (search: Record<string, unknown>) => parseWeekendSearch(search),
+  component: function WeekendRoute() {
+    const { meeting_key, session_key } = weekendRoute.useSearch()
+    return (
+      <WeekendPage focusMeetingKey={meeting_key} focusSessionKey={session_key} />
+    )
+  },
+})
+
+export const exploreRoute = createRoute({
+  getParentRoute: () => rootRoute,
+  path: '/explore',
+  component: ExplorePage,
 })
 
 export const raceHubRoute = createRoute({
   getParentRoute: () => rootRoute,
   path: '/race-hub',
-  validateSearch: (search: Record<string, unknown>): RaceHubSearch => {
+  validateSearch: (search: Record<string, unknown>) => parseRaceHubSearch(search),
-    const sessionKey = Number(search.session_key)
-    return Number.isFinite(sessionKey) && sessionKey > 0 ? { session_key: sessionKey } : {}
-  },
   component: function RaceHubRoute() {
     const { session_key } = raceHubRoute.useSearch()
     return <RaceHubPage sessionKey={session_key ?? 0} />
@@ -90,14 +99,21 @@ export const briefingRoute = createRoute({
   component: BriefingPage,
 })
 
+// Preview folds into the Weekend home. /preview is a stable alias that renders the
+// Weekend page in its preparation surface (PreSessionView) whenever there is a next
+// event — so saved preview links and the "Prepare for …" CTA reach real preview
+// content instead of redirecting back to the same between-races screen.
 export const previewRoute = createRoute({
   getParentRoute: () => rootRoute,
   path: '/preview',
-  component: RacePreviewPage,
+  component: function PreviewRoute() {
+    return <WeekendPage preview />
+  },
 })
 
 const routeTree = rootRoute.addChildren([
-  commandCenterRoute,
+  weekendRoute,
+  exploreRoute,
   raceHubRoute,
   adminRoute,
   dataLibraryRoute,

frontend/src/styles/app.css

@@ -89,16 +89,6 @@ a { color: inherit; text-decoration: none; }
 }
 .app-nav::-webkit-scrollbar { display: none; }
 
-/* The nav scrolls horizontally with its scrollbar hidden. Below the width
-   where the links stop fitting, fade the trailing edge so the cut-off item
-   reads as "scroll for more" instead of as a clipping bug. */
-@media (max-width: 560px) {
-  .app-nav {
-    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 32px), transparent 100%);
-    mask-image: linear-gradient(to right, #000 calc(100% - 32px), transparent 100%);
-  }
-}
-
 .nav-logo {
   font-family: var(--f-mono);
   font-size: 15px;
@@ -122,30 +112,6 @@ a { color: inherit; text-decoration: none; }
 .nav-links a:hover { color: var(--text); background: var(--surface-h); }
 .nav-links a.active { color: var(--text); background: var(--surface-2); }
 
-/* Live nav gets a pulsing marker only while a session is on air. */
-.nav-live { display: inline-flex; align-items: center; gap: 6px; }
-.nav-links a.nav-live-on { color: var(--text); font-weight: 600; }
-.nav-live-dot {
-  width: 7px;
-  height: 7px;
-  border-radius: 50%;
-  background: var(--red);
-  box-shadow: 0 0 0 0 rgba(225, 6, 0, 0.4);
-  animation: pulse-live 1.6s infinite;
-}
-
-.sr-only {
-  position: absolute;
-  width: 1px;
-  height: 1px;
-  padding: 0;
-  margin: -1px;
-  overflow: hidden;
-  clip: rect(0, 0, 0, 0);
-  white-space: nowrap;
-  border: 0;
-}
-
 .nav-utility {
   margin-left: auto;
   display: flex;
@@ -176,6 +142,53 @@ a { color: inherit; text-decoration: none; }
   background: var(--surface-2);
 }
 
+/* ── Mobile bottom nav ── */
+.app-bottom-nav {
+  display: none;
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  z-index: 100;
+  height: 60px;
+  padding-bottom: env(safe-area-inset-bottom, 0);
+  background: rgba(18, 18, 18, 0.92);
+  backdrop-filter: blur(16px);
+  -webkit-backdrop-filter: blur(16px);
+  border-top: 1px solid rgba(255, 255, 255, 0.08);
+}
+.bottom-nav-link {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 3px;
+  font-size: 10px;
+  font-weight: 600;
+  color: var(--text-3);
+}
+.bottom-nav-link.active { color: var(--red); }
+.bottom-nav-link:hover { color: var(--text-2); }
+
+@media (max-width: 640px) {
+  /* On mobile the bottom bar is the single primary navigation system. The top
+     bar's Primary links are hidden so the two are never both shown; the top bar
+     keeps only the logo and the Admin operator utility. */
+  .app-bottom-nav { display: flex; }
+  .app-nav .nav-links { display: none; }
+  .app-nav { justify-content: space-between; }
+  /* Keep page content clear of the fixed bottom bar. */
+  .wk-page { padding-bottom: calc(60px + env(safe-area-inset-bottom, 0) + var(--s4)); }
+}
+
+/* ── Focus visibility (accessibility) ── */
+:focus-visible {
+  outline: 2px solid var(--red);
+  outline-offset: 2px;
+  border-radius: 3px;
+}
+
 /* ── Page ── */
 .page {
   max-width: 1040px;
@@ -397,6 +410,9 @@ a { color: inherit; text-decoration: none; }
 .badge-partial { background: rgba(255,214,0,.12); color: var(--yellow); border: 1px solid rgba(255,214,0,.25); }
 .badge-cancelled { background: rgba(255,107,53,.12); color: #ff8a5c; border: 1px solid rgba(255,107,53,.28); }
 .badge-none    { background: rgba(80,80,80,.12); color: var(--text-3); border: 1px solid var(--border); }
+.badge-stale   { background: rgba(255,214,0,.10); color: var(--yellow); border: 1px solid rgba(255,214,0,.22); }
+.badge-limited { background: rgba(120,160,220,.12); color: #9bb7e0; border: 1px solid rgba(120,160,220,.28); }
+.badge-missing { background: rgba(80,80,80,.12); color: var(--text-3); border: 1px solid var(--border); }
 
 /* ── Dataset strip ── */
 .dataset-strip {
@@ -572,6 +588,82 @@ a { color: inherit; text-decoration: none; }
   margin-bottom: var(--s5);
 }
 
+.route-state {
+  padding: var(--s7) var(--s5);
+  text-align: center;
+  max-width: 420px;
+  margin: 0 auto;
+}
+
+.route-state-availability {
+  margin-bottom: var(--s4);
+}
+
+.route-state-title {
+  font-family: var(--f-display, var(--f-mono));
+  font-size: 18px;
+  font-weight: 600;
+  color: var(--text);
+  margin-bottom: var(--s3);
+}
+
+.route-state-message {
+  font-size: 13px;
+  line-height: 1.5;
+  color: var(--text-2);
+  margin-bottom: var(--s5);
+}
+
+.route-state-retry {
+  appearance: none;
+  border: 1px solid rgba(255, 255, 255, 0.18);
+  background: rgba(255, 255, 255, 0.04);
+  color: var(--text);
+  font-family: var(--f-mono);
+  font-size: 12px;
+  padding: 8px 16px;
+  border-radius: 2px;
+  cursor: pointer;
+}
+
+.route-state-retry:hover:not(:disabled) {
+  border-color: rgba(225, 6, 0, 0.45);
+  color: #fff;
+}
+
+.route-state-retry:focus-visible {
+  outline: 2px solid var(--red);
+  outline-offset: 2px;
+}
+
+.route-state-retry:disabled {
+  opacity: 0.55;
+  cursor: not-allowed;
+}
+
+.data-notice {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: var(--s3);
+  padding: var(--s3) var(--s4);
+  margin-bottom: var(--s4);
+  background: rgba(255, 214, 0, 0.06);
+  border: 1px solid rgba(255, 214, 0, 0.2);
+  border-radius: 2px;
+  font-size: 12px;
+  color: var(--text-2);
+}
+
+.data-notice-text {
+  flex: 1;
+  min-width: 160px;
+}
+
+.data-notice-retry {
+  padding: 4px 10px;
+}
+
 /* ── Live timing ── */
 .live-page { max-width: 1320px; }
 
@@ -1807,6 +1899,163 @@ a { color: inherit; text-decoration: none; }
 .tab-btn:hover { color: var(--text-2); }
 .tab-btn.active { color: var(--text); border-bottom-color: var(--red); }
 
+/* ── Grouped analysis navigation ── */
+.tab-bar-grouped {
+  gap: var(--s5);
+  align-items: flex-end;
+}
+.tab-group {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  flex-shrink: 0;
+}
+.tab-group + .tab-group {
+  border-left: 1px solid var(--border);
+  padding-left: var(--s5);
+}
+.tab-group-label {
+  font-size: 9px;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--text-3);
+  opacity: 0.7;
+  padding: 0 14px;
+}
+.tab-group-btns {
+  display: flex;
+}
+
+/* ── Session lifecycle state dots ── */
+.rh-state-ready { background: var(--green); }
+.rh-state-partial { background: var(--yellow); }
+.rh-state-live { background: var(--red); }
+.rh-state-upcoming { background: var(--text-3); }
+.rh-state-preparing { background: var(--text-3); opacity: 0.5; }
+.rh-state-unavailable { background: var(--text-3); opacity: 0.4; }
+.rh-state-cancelled { background: var(--text-3); opacity: 0.35; }
+
+/* ── Pre-session (expected availability) view ── */
+.rh-presession {
+  display: flex;
+  flex-direction: column;
+  gap: var(--s5);
+}
+.rh-presession-band {
+  padding: var(--s6) var(--s5);
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-left: 3px solid var(--gp-accent);
+  border-radius: 4px;
+  display: flex;
+  flex-direction: column;
+  gap: var(--s3);
+}
+.rh-presession-eyebrow {
+  font-size: 10px;
+  letter-spacing: 0.14em;
+  text-transform: uppercase;
+  color: var(--text-3);
+}
+.rh-presession-title {
+  font-size: 22px;
+  font-weight: 700;
+  margin: 0;
+}
+.rh-presession-sub { color: var(--text-2); max-width: 60ch; }
+.rh-presession-countdown {
+  font-size: 15px;
+  color: var(--text);
+  margin-top: var(--s3);
+}
+.rh-partial-banner {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--s3);
+  margin: 0 var(--s5) var(--s3);
+  padding: var(--s3) var(--s4);
+  border: 1px solid color-mix(in srgb, var(--yellow) 45%, var(--border));
+  background: color-mix(in srgb, var(--yellow) 12%, transparent);
+  color: var(--text-2);
+  font-size: 12px;
+}
+.rh-partial-banner-link {
+  appearance: none;
+  background: transparent;
+  border: 0;
+  color: var(--text);
+  text-decoration: underline;
+  cursor: pointer;
+  font: inherit;
+}
+.rh-expected-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
+  gap: var(--s4);
+}
+.rh-expected-card {
+  padding: var(--s4);
+  border: 1px solid var(--border);
+  border-radius: 4px;
+  background: var(--surface);
+  display: flex;
+  align-items: center;
+  gap: var(--s3);
+  color: var(--text-2);
+  font-size: 13px;
+}
+.rh-expected-card .rh-expected-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--text-3);
+  opacity: 0.6;
+}
+
+/* ── Loading / error recovery ── */
+.rh-recover {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: var(--s4);
+  padding: var(--s6) var(--s5);
+}
+.rh-recover-actions {
+  display: flex;
+  gap: var(--s3);
+  flex-wrap: wrap;
+}
+.rh-recover-btn {
+  padding: 8px 14px;
+  font-size: 12px;
+  font-weight: 600;
+  border: 1px solid var(--border);
+  border-radius: 4px;
+  background: var(--surface);
+  color: var(--text);
+  cursor: pointer;
+  text-decoration: none;
+}
+.rh-recover-btn:hover { border-color: var(--gp-accent); }
+.rh-recover-btn.primary { border-color: var(--red); color: var(--text); }
+
+/* ── Diagnostics (secondary) action ── */
+.rh-diagnostics-toggle {
+  align-self: flex-start;
+  margin-left: auto;
+  padding: 6px 12px;
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--text-3);
+  background: none;
+  border: 1px solid var(--border);
+  border-radius: 4px;
+  cursor: pointer;
+}
+.rh-diagnostics-toggle:hover { color: var(--text-2); border-color: var(--gp-accent); }
+.rh-diagnostics-toggle.active { color: var(--text); }
+
 /* ── Dataset status view ── */
 .ds-legend {
   display: flex;
@@ -2656,6 +2905,31 @@ a { color: inherit; text-decoration: none; }
 
 .rh-topbar-spacer { flex: 1; }
 
+.rh-back-weekend {
+  flex-shrink: 0;
+  padding: 4px 10px;
+  font-size: 10px;
+  font-weight: 700;
+  font-family: var(--f-mono);
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+  color: var(--text-2);
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 2px;
+  transition: color 0.1s, border-color 0.1s, background 0.1s;
+}
+.rh-back-weekend:hover,
+.rh-back-weekend:focus-visible {
+  color: var(--text);
+  border-color: var(--gp-accent);
+  background: var(--surface-h);
+  outline: none;
+}
+.rh-back-weekend:focus-visible {
+  box-shadow: 0 0 0 2px color-mix(in srgb, var(--gp-accent) 45%, transparent);
+}
+
 .rh-switcher-toggle {
   padding: 4px 10px;
   font-size: 10px;
@@ -3231,7 +3505,10 @@ a { color: inherit; text-decoration: none; }
   .rh-overview-row { grid-template-columns: 1fr; }
 }
 @media (max-width: 640px) {
-  .rh-page { padding: var(--s4); gap: var(--s4); }
+  .rh-page { padding: var(--s4); gap: var(--s4); padding-bottom: 88px; }
+  .rh-topbar { flex-wrap: wrap; gap: var(--s3); }
+  .rh-topbar-spacer { display: none; }
+  .rh-back-weekend { order: -1; }
   .rh-identity-body { padding: var(--s3) var(--s4); gap: var(--s3); }
   .rh-identity-decal { font-size: 28px; }
   .rh-identity-name { font-size: 17px; }

frontend/src/styles/live-state.css

@@ -0,0 +1,414 @@
+/* ── Live → settling → analysis handoff (issue #74) ──
+ *
+ * State-transition presentation for Live: session/flag chrome that replaces
+ * the old connection-as-session conflation, the connection-loss warning, the
+ * archive read-only strip, and the settling/inactive handoff surface.
+ */
+
+/* Session flag: primary session state. Feed health is secondary. */
+.live-session-flag {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--s2);
+  padding: 5px 9px;
+  border-radius: 3px;
+  font-family: var(--f-mono);
+  font-size: 10px;
+  font-weight: 800;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+  white-space: nowrap;
+}
+
+.live-session-flag-live {
+  background: rgba(225, 6, 0, 0.14);
+  border: 1px solid rgba(225, 6, 0, 0.35);
+  color: #ff6b6b;
+}
+
+.live-session-flag-live.is-stale {
+  background: rgba(255, 214, 0, 0.1);
+  border-color: rgba(255, 214, 0, 0.35);
+  color: var(--yellow);
+}
+
+.live-session-flag-archive {
+  background: rgba(70, 140, 255, 0.12);
+  border: 1px solid rgba(70, 140, 255, 0.35);
+  color: #8bb7ff;
+}
+
+.live-session-dot {
+  width: 7px;
+  height: 7px;
+  border-radius: 50%;
+  background: currentColor;
+  box-shadow: 0 0 0 0 currentColor;
+  animation: live-pulse 1.6s ease-in-out infinite;
+}
+
+.live-session-flag-live.is-stale .live-session-dot {
+  animation: none;
+  opacity: 0.55;
+}
+
+.live-feed-health {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--s2);
+  padding: 4px 7px;
+  border-radius: 2px;
+  font-family: var(--f-mono);
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: 0.06em;
+  text-transform: uppercase;
+  color: var(--text-3);
+  border: 1px solid var(--border-2);
+  background: rgba(255, 255, 255, 0.03);
+}
+
+.live-feed-dot {
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: currentColor;
+}
+
+.live-feed-connected {
+  color: var(--green);
+  border-color: rgba(57, 199, 58, 0.25);
+  background: rgba(57, 199, 58, 0.08);
+}
+
+.live-feed-connecting {
+  color: var(--yellow);
+  border-color: rgba(255, 214, 0, 0.25);
+  background: rgba(255, 214, 0, 0.08);
+}
+
+.live-feed-disconnected,
+.live-feed-error {
+  color: #ff6b6b;
+  border-color: rgba(225, 6, 0, 0.24);
+  background: rgba(225, 6, 0, 0.08);
+}
+
+.live-banner-archive {
+  border-color: rgba(70, 140, 255, 0.28);
+}
+
+.live-archive-stamp {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-end;
+  gap: 2px;
+}
+
+.live-archive-readonly {
+  font-size: 10px;
+  font-weight: 800;
+  letter-spacing: 0.08em;
+  color: #8bb7ff;
+}
+
+.live-archive-captured {
+  font-size: 10px;
+  color: var(--text-3);
+}
+
+.live-state-archive {
+  background: rgba(70, 140, 255, 0.12);
+  color: #8bb7ff;
+  border: 1px solid rgba(70, 140, 255, 0.28);
+}
+
+/* Disconnected warning: a live session whose feed dropped. Distinct from the
+ * blue archive strip so a dropped feed is never mistaken for a read-only
+ * archive. The retained tower stays visible beneath it. */
+.live-status-strip.live-status-warn {
+  display: flex;
+  align-items: center;
+  gap: var(--s3);
+}
+
+.live-status-strip.live-status-warn::before {
+  content: '';
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  background: var(--yellow);
+  animation: live-pulse 1.6s ease-in-out infinite;
+}
+
+@keyframes live-pulse {
+  0%,
+  100% {
+    opacity: 1;
+  }
+  50% {
+    opacity: 0.35;
+  }
+}
+
+.live-status-strip.live-status-archive {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--s4);
+  flex-wrap: wrap;
+}
+
+.live-archive-exit {
+  min-height: 28px;
+  padding: 0 var(--s4);
+  border: 1px solid rgba(70, 140, 255, 0.4);
+  border-radius: 4px;
+  background: rgba(70, 140, 255, 0.12);
+  color: #8bb7ff;
+  font-family: var(--f-mono);
+  font-size: 11px;
+  font-weight: 700;
+  text-transform: uppercase;
+  cursor: pointer;
+}
+
+.live-archive-exit:hover {
+  border-color: rgba(70, 140, 255, 0.7);
+  background: rgba(70, 140, 255, 0.2);
+}
+
+/* ── Handoff surface (settling + inactive) ── */
+.live-handoff {
+  border: 1px solid var(--border-2);
+  border-radius: 10px;
+  padding: var(--s6) var(--s5);
+  background:
+    radial-gradient(120% 120% at 0% 0%, rgba(255, 255, 255, 0.04), transparent 55%),
+    var(--surface);
+}
+
+.live-handoff-settling {
+  border-left: 3px solid var(--yellow);
+}
+
+.live-handoff-inactive {
+  border-left: 3px solid var(--border-2);
+}
+
+.live-handoff-head {
+  display: flex;
+  flex-direction: column;
+  gap: var(--s3);
+  margin-bottom: var(--s5);
+}
+
+.live-handoff-eyebrow {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--s2);
+  align-self: flex-start;
+  padding: 4px var(--s3);
+  border-radius: 3px;
+  font-size: 10px;
+  font-weight: 800;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.live-handoff-settling .live-handoff-eyebrow {
+  color: var(--yellow);
+  background: rgba(245, 158, 11, 0.14);
+  border: 1px solid rgba(245, 158, 11, 0.3);
+}
+
+.live-handoff-inactive .live-handoff-eyebrow {
+  color: var(--text-2);
+  background: rgba(255, 255, 255, 0.05);
+  border: 1px solid var(--border-2);
+}
+
+.live-handoff-title {
+  font-size: 26px;
+  line-height: 1.15;
+  font-weight: 800;
+}
+
+.live-handoff-captured {
+  font-size: 11px;
+  color: var(--text-3);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.live-handoff-sub {
+  font-size: 13px;
+  color: var(--text-2);
+  max-width: 62ch;
+}
+
+.live-handoff-feed {
+  align-self: flex-start;
+  margin-top: var(--s2);
+}
+
+/* Provisional final-order snapshot chips (settling only). */
+.live-handoff-snapshot {
+  margin-bottom: var(--s5);
+  padding: var(--s4);
+  border: 1px dashed var(--border-2);
+  border-radius: 8px;
+  background: rgba(255, 255, 255, 0.02);
+}
+
+.live-handoff-snapshot-label {
+  display: block;
+  margin-bottom: var(--s3);
+  font-size: 10px;
+  color: var(--text-3);
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+}
+
+.live-handoff-order {
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--s3);
+  list-style: none;
+}
+
+.live-handoff-order li {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--s2);
+  padding: var(--s2) var(--s3);
+  border: 1px solid var(--border-2);
+  border-radius: 4px;
+  background: rgba(255, 255, 255, 0.03);
+  font-size: 12px;
+}
+
+.live-handoff-order li span:first-child {
+  color: var(--text-3);
+  font-size: 11px;
+}
+
+.live-handoff-code {
+  font-weight: 800;
+  color: var(--text);
+}
+
+/* ── Action cards ── */
+.live-handoff-actions {
+  display: grid;
+  gap: var(--s3);
+}
+
+.live-handoff-action {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--s4);
+  width: 100%;
+  padding: var(--s4) var(--s5);
+  border: 1px solid var(--border-2);
+  border-radius: 8px;
+  background: rgba(255, 255, 255, 0.03);
+  color: var(--text);
+  text-align: left;
+  cursor: pointer;
+  transition:
+    border-color 0.15s ease,
+    background 0.15s ease,
+    transform 0.15s ease;
+}
+
+button.live-handoff-action {
+  font: inherit;
+}
+
+.live-handoff-action:hover {
+  border-color: var(--border-glow);
+  background: rgba(255, 255, 255, 0.06);
+  transform: translateX(2px);
+}
+
+.live-handoff-action-body {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+}
+
+.live-handoff-action-label {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--s2);
+  font-size: 14px;
+  font-weight: 700;
+}
+
+.live-handoff-action-meta {
+  font-size: 11px;
+  color: var(--text-3);
+}
+
+/* The primary "open analysis" action is the strongest affordance. */
+.live-handoff-primary {
+  border-color: rgba(230, 36, 41, 0.4);
+  background: linear-gradient(90deg, rgba(230, 36, 41, 0.14), transparent 60%);
+}
+
+.live-handoff-primary:hover {
+  border-color: rgba(230, 36, 41, 0.7);
+  background: linear-gradient(90deg, rgba(230, 36, 41, 0.22), transparent 60%);
+}
+
+/* Pending-analysis states read as "waiting", not actionable links. */
+.live-handoff-primary[data-ready='false'] {
+  border-color: rgba(245, 158, 11, 0.4);
+  background: linear-gradient(90deg, rgba(245, 158, 11, 0.1), transparent 60%);
+}
+
+.live-handoff-pending {
+  cursor: default;
+  opacity: 0.75;
+}
+
+.live-handoff-pending:hover {
+  transform: none;
+  background: rgba(255, 255, 255, 0.03);
+  border-color: var(--border-2);
+}
+
+.live-handoff-next {
+  cursor: default;
+}
+
+.live-handoff-next:hover {
+  transform: none;
+}
+
+/* ── Responsive: keep the handoff usable at tablet / mobile widths ── */
+@media (max-width: 640px) {
+  .live-handoff {
+    padding: var(--s5) var(--s4);
+  }
+
+  .live-handoff-title {
+    font-size: 21px;
+  }
+
+  .live-handoff-action {
+    padding: var(--s4);
+  }
+
+  .live-handoff-action-label {
+    font-size: 13px;
+  }
+
+  .live-status-strip.live-status-archive {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+}

frontend/src/styles/weekend.css

@@ -0,0 +1,419 @@
+/* ── Weekend adaptive home ── */
+.wk-page {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: var(--s6) var(--s6) 64px;
+  width: 100%;
+}
+
+.wk-focus {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--s5);
+  margin-bottom: var(--s5);
+  padding: var(--s5);
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-left: 3px solid var(--red);
+  border-radius: 8px;
+}
+.wk-focus-copy { display: flex; flex-direction: column; gap: var(--s2); min-width: 0; }
+.wk-focus-eyebrow {
+  font-size: 10px;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--text-3);
+}
+.wk-focus-title {
+  font-size: 18px;
+  font-weight: 700;
+  line-height: 1.2;
+}
+.wk-focus-session {
+  font-size: 13px;
+  color: var(--text-2);
+}
+.wk-focus-cta { flex-shrink: 0; }
+
+.wk-eyebrow {
+  display: flex;
+  align-items: center;
+  gap: var(--s4);
+  font-size: 11px;
+  font-weight: 700;
+  letter-spacing: 0.18em;
+  text-transform: uppercase;
+  color: var(--text-2);
+  margin-bottom: var(--s5);
+}
+.wk-eyebrow::after {
+  content: '';
+  flex: 1;
+  height: 1px;
+  background: linear-gradient(90deg, var(--red), transparent);
+}
+
+.wk-card-head {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: var(--s4);
+  margin-bottom: var(--s4);
+}
+.wk-card-title {
+  font-size: 13px;
+  font-weight: 700;
+  color: var(--text);
+}
+.wk-card-link {
+  font-size: 11px;
+  color: var(--text-2);
+  white-space: nowrap;
+}
+.wk-card-link:hover { color: var(--text); }
+
+.wk-flag { font-size: 22px; line-height: 1; }
+
+/* ── CTAs ── */
+.wk-cta {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: var(--s3);
+  padding: var(--s4) var(--s5);
+  font-size: 13px;
+  font-weight: 600;
+  border-radius: 6px;
+  transition: background 0.12s, border-color 0.12s, transform 0.12s;
+}
+.wk-cta-primary { background: var(--red); color: #fff; }
+.wk-cta-primary:hover { background: #ff3b3f; }
+.wk-cta:disabled,
+.wk-cta[aria-busy='true'] {
+  opacity: 0.55;
+  cursor: not-allowed;
+  pointer-events: none;
+}
+.wk-cta-ghost {
+  background: transparent;
+  color: var(--text-2);
+  border: 1px solid var(--border-2);
+}
+.wk-cta-ghost:hover { color: var(--text); border-color: var(--text-3); }
+.wk-cta-wide { width: 100%; }
+
+/* ── Between-races top grid ── */
+.wk-top-grid {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: var(--s5);
+  margin-bottom: var(--s5);
+}
+.wk-mid-grid {
+  display: grid;
+  grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
+  gap: var(--s5);
+  margin-bottom: var(--s5);
+}
+
+.wk-event-card {
+  min-width: 0;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  padding: var(--s5);
+  display: flex;
+  flex-direction: column;
+  gap: var(--s5);
+}
+.wk-event-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--s4);
+}
+.wk-event-id { display: flex; align-items: center; gap: var(--s4); min-width: 0; }
+.wk-event-name {
+  font-size: 24px;
+  font-weight: 700;
+  letter-spacing: -0.01em;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.wk-event-tag {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: 0.1em;
+  text-transform: uppercase;
+  white-space: nowrap;
+}
+.wk-tag-done { color: var(--text-2); }
+.wk-tag-next { color: var(--red); }
+
+.wk-event-body {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) minmax(0, 200px);
+  gap: var(--s5);
+  align-items: stretch;
+}
+
+/* ── Podium ── */
+.wk-podium { list-style: none; display: flex; flex-direction: column; gap: var(--s3); }
+.wk-podium-row {
+  display: grid;
+  grid-template-columns: 20px minmax(0, 1fr) auto;
+  align-items: center;
+  gap: var(--s4);
+  padding: var(--s3) var(--s4);
+  background: var(--surface-h);
+  border-left: 3px solid var(--wk-team, var(--border-2));
+  border-radius: 4px;
+}
+.wk-podium-pos { font-weight: 700; color: var(--text-2); }
+.wk-podium-code { font-weight: 700; color: var(--wk-team, var(--text)); overflow: hidden; text-overflow: ellipsis; }
+.wk-podium-gap { color: var(--text-2); font-size: 12px; }
+.wk-podium-empty { color: var(--text-3); font-size: 12px; padding: var(--s4); }
+
+.wk-story-card {
+  display: flex;
+  flex-direction: column;
+  gap: var(--s3);
+  padding: var(--s4);
+  background: rgba(230, 36, 41, 0.05);
+  border: 1px solid rgba(230, 36, 41, 0.25);
+  border-radius: 8px;
+}
+.wk-story-label { font-size: 13px; font-weight: 700; color: var(--red); }
+.wk-story-text { font-size: 12px; color: var(--text-2); flex: 1; }
+
+/* ── Next event ── */
+.wk-next-body { display: flex; flex-direction: column; gap: var(--s5); }
+.wk-countdown { display: flex; gap: var(--s5); align-items: baseline; }
+.wk-count-unit { font-size: 13px; color: var(--text-2); font-family: var(--f-mono); }
+.wk-count-unit b { font-size: 40px; color: var(--red); font-weight: 700; margin-right: 2px; }
+.wk-countdown-clock { font-size: 32px; font-weight: 700; color: var(--blue); }
+.wk-countdown-live { font-size: 20px; font-weight: 700; color: var(--red); }
+.wk-next-session { display: flex; flex-direction: column; gap: 2px; }
+.wk-next-label { font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-3); }
+.wk-next-value { font-size: 15px; font-weight: 600; }
+.wk-season-complete-copy { font-size: 13px; color: var(--text-2); }
+
+/* ── Championship impact ── */
+.wk-champ, .wk-briefing, .wk-season-nav {
+  min-width: 0;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  padding: var(--s5);
+}
+.wk-champ-list { list-style: none; display: flex; flex-direction: column; gap: var(--s3); }
+.wk-champ-row {
+  display: grid;
+  grid-template-columns: 18px minmax(0, 1fr) auto auto;
+  align-items: center;
+  gap: var(--s4);
+  padding: var(--s2) var(--s3);
+  border-left: 3px solid var(--wk-team, var(--border-2));
+}
+.wk-champ-pos { color: var(--text-3); }
+.wk-champ-code { font-weight: 700; color: var(--wk-team, var(--text)); }
+.wk-champ-pts { font-weight: 700; }
+.wk-champ-gap { color: var(--text-3); font-size: 11px; min-width: 34px; text-align: right; }
+.wk-champ-note { margin-top: var(--s4); font-size: 11px; color: var(--text-3); }
+
+/* ── Season progress strip ── */
+.wk-countdown-tbc { font-size: 14px; color: var(--text-3); }
+.wk-season-progress { display: flex; flex-direction: column; gap: var(--s3); }
+.wk-season-progress-head { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); }
+.wk-season-bar {
+  position: relative;
+  height: 8px;
+  border-radius: 999px;
+  background: var(--surface-3);
+  overflow: hidden;
+}
+.wk-season-bar-fill {
+  position: absolute;
+  inset: 0 auto 0 0;
+  background: var(--red);
+  border-radius: 999px;
+}
+.wk-season-progress-label { font-size: 11px; color: var(--text-3); }
+
+/* ── Briefing ── */
+.wk-briefing-list { list-style: none; display: flex; flex-direction: column; }
+.wk-briefing-item { border-top: 1px solid var(--border); }
+.wk-briefing-item:first-child { border-top: none; }
+.wk-briefing-link {
+  display: grid;
+  grid-template-columns: minmax(0, auto) minmax(0, 1fr) auto;
+  align-items: center;
+  gap: var(--s4);
+  padding: var(--s4) 0;
+}
+.wk-briefing-link:hover .wk-briefing-title { color: var(--red); }
+.wk-briefing-cat { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--red); white-space: nowrap; }
+.wk-briefing-title { font-size: 13px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.wk-briefing-source { font-size: 11px; color: var(--text-3); white-space: nowrap; }
+
+/* ── Between-sessions / live ── */
+.wk-sessions, .wk-live, .wk-pre { display: flex; flex-direction: column; gap: var(--s5); }
+.wk-sessions-head { display: flex; flex-direction: column; gap: 2px; }
+.wk-sessions-title { font-size: 28px; font-weight: 800; letter-spacing: -0.01em; }
+.wk-sessions-circuit { font-size: 12px; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.06em; }
+
+.wk-timeline {
+  list-style: none;
+  display: flex;
+  gap: var(--s3);
+  overflow-x: auto;
+  padding-bottom: var(--s3);
+  scrollbar-width: thin;
+}
+.wk-timeline-node {
+  flex: 1 0 auto;
+  min-width: 72px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: var(--s2);
+  padding: var(--s3);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+}
+.wk-timeline-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--surface-3); }
+.wk-timeline-done .wk-timeline-dot { background: var(--green); }
+.wk-timeline-live .wk-timeline-dot { background: var(--red); box-shadow: 0 0 0 3px rgba(230,36,41,0.25); }
+.wk-timeline-next { border-color: var(--red); }
+.wk-timeline-next .wk-timeline-dot { border: 2px solid var(--red); }
+.wk-timeline-name { font-size: 12px; font-weight: 600; }
+.wk-timeline-state { font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }
+.wk-timeline-done .wk-timeline-state { color: var(--green); }
+.wk-timeline-live .wk-timeline-state, .wk-timeline-next .wk-timeline-state { color: var(--red); }
+
+.wk-recap-card, .wk-upnext-card, .wk-live-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  padding: var(--s5);
+  display: flex;
+  flex-direction: column;
+  gap: var(--s4);
+}
+.wk-recap-eyebrow, .wk-upnext-eyebrow { font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); }
+.wk-recap-title, .wk-upnext-title { font-size: 20px; font-weight: 700; }
+.wk-upnext-when { font-size: 12px; color: var(--text-3); }
+.wk-upnext-card { border-color: rgba(230,36,41,0.3); }
+
+.wk-live-card { border-color: rgba(230,36,41,0.35); }
+.wk-live-head { display: flex; align-items: center; justify-content: space-between; }
+.wk-live-pulse { width: 12px; height: 12px; border-radius: 50%; background: var(--red); box-shadow: 0 0 0 4px rgba(230,36,41,0.2); }
+.wk-live-lead { font-size: 14px; color: var(--text-2); }
+
+/* ── Pre-session ── */
+.wk-pre-head {
+  display: flex;
+  align-items: center;
+  gap: var(--s5);
+  flex-wrap: wrap;
+}
+.wk-pre-countdown { display: flex; flex-direction: column; gap: 2px; margin-left: auto; }
+.wk-pre-preview { min-width: 0; }
+/* The folded preview page ships its own max-width page; reset it inside Weekend. */
+.wk-pre-preview .preview-page { max-width: 100%; padding: 0; }
+
+/* ── Status views ── */
+.wk-status {
+  max-width: 640px;
+  margin: 64px auto;
+  text-align: center;
+  display: flex;
+  flex-direction: column;
+  gap: var(--s4);
+  align-items: center;
+}
+.wk-status-eyebrow { font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3); }
+.wk-status-title { font-size: 22px; font-weight: 700; }
+.wk-status-sub { font-size: 13px; color: var(--text-2); }
+.wk-status-actions { display: flex; gap: var(--s4); margin-top: var(--s4); }
+.wk-status-error .wk-status-title { color: var(--red); }
+
+/* ── Responsive ── */
+@media (max-width: 900px) {
+  .wk-top-grid, .wk-mid-grid { grid-template-columns: 1fr; }
+  .wk-event-body { grid-template-columns: 1fr; }
+}
+@media (max-width: 640px) {
+  .wk-page { padding: var(--s5) var(--s5) 88px; }
+  .wk-focus {
+    flex-direction: column;
+    align-items: stretch;
+  }
+  .wk-focus-cta { width: 100%; justify-content: center; }
+  .wk-event-name { font-size: 20px; }
+  .wk-sessions-title { font-size: 22px; }
+  .wk-count-unit b { font-size: 32px; }
+  .wk-pre-head { flex-direction: column; align-items: flex-start; }
+  .wk-pre-countdown { margin-left: 0; }
+}
+
+/* ── Explore ── */
+.wk-explore { display: flex; flex-direction: column; gap: var(--s6); }
+.wk-explore-section {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  padding: var(--s5);
+}
+.wk-explore-grid {
+  list-style: none;
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+  gap: var(--s4);
+}
+.wk-explore-card {
+  display: flex;
+  flex-direction: column;
+  gap: var(--s2);
+  padding: var(--s4);
+  min-width: 0;
+  background: var(--surface-h);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  height: 100%;
+}
+.wk-explore-card.is-link { transition: border-color 0.12s, background 0.12s; }
+.wk-explore-card.is-link:hover { border-color: var(--text-3); background: var(--surface-2); }
+.wk-explore-top { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--text-3); }
+.wk-explore-flag { font-size: 18px; }
+.wk-explore-name { font-size: 14px; font-weight: 700; overflow: hidden; text-overflow: ellipsis; }
+.wk-explore-meta { font-size: 11px; color: var(--text-3); }
+.wk-explore-state { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; margin-top: var(--s2); }
+.wk-explore-state.is-done { color: var(--green); }
+.wk-explore-state.is-upcoming { color: var(--text-3); }
+
+.wk-explore-drivers { list-style: none; display: flex; flex-wrap: wrap; gap: var(--s3); }
+.wk-driver-chip {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--s3);
+  padding: var(--s3) var(--s4);
+  background: var(--surface-h);
+  border: 1px solid var(--border);
+  border-left: 3px solid var(--wk-team, var(--border-2));
+  border-radius: 6px;
+  transition: border-color 0.12s;
+}
+.wk-driver-chip:hover { border-color: var(--text-3); }
+.wk-driver-pos { color: var(--text-3); font-size: 11px; }
+.wk-driver-code { font-weight: 700; color: var(--wk-team, var(--text)); }
+.wk-driver-pts { color: var(--text-2); font-size: 12px; }
+
+/* ── Reduced motion ── */
+@media (prefers-reduced-motion: reduce) {
+  .wk-cta, .wk-briefing-title, .wk-live-pulse, .wk-timeline-live .wk-timeline-dot { transition: none; }
+}

frontend/src/test/BriefingPage.test.tsx

@@ -1,4 +1,4 @@
-import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { render, screen, waitFor, fireEvent, within } from '@testing-library/react'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { BriefingPage } from '../pages/BriefingPage'
@@ -21,6 +21,7 @@ import {
   fetchChampionshipHub,
   markNewsRead,
 } from '../api'
+import { rememberResponseAvailability } from '../lib/fetch'
 
 const mockFetchNews = vi.mocked(fetchNews)
 const mockFetchNewsArticle = vi.mocked(fetchNewsArticle)
@@ -208,4 +209,62 @@ describe('BriefingPage digest layout', () => {
     })
     expect(screen.getByRole('tab', { name: /News/i })).toBeInTheDocument()
   })
+
+  it('keeps articles usable and shows Limited when grouping supplements fail', async () => {
+    mockFetchSeasonMeetings.mockRejectedValue(new Error('API 503: meetings failed'))
+    mockFetchHub.mockRejectedValue(new Error('API 503: hub failed'))
+    renderPage()
+
+    await waitFor(() => {
+      expect(screen.getByTestId('briefing-data-notice')).toHaveTextContent(/Limited/i)
+    })
+    expect(screen.getByText('Verstappen sets the pace in Bahrain')).toBeInTheDocument()
+    expect(screen.queryByTestId('briefing-error')).not.toBeInTheDocument()
+
+    let meetingsCalls = 1
+    let hubCalls = 1
+    let resolveMeetings!: (value: Meeting[]) => void
+    let resolveHub!: (value: ChampionshipHub) => void
+    mockFetchSeasonMeetings.mockImplementation(
+      () =>
+        new Promise<Meeting[]>((resolve) => {
+          meetingsCalls += 1
+          resolveMeetings = resolve
+        }),
+    )
+    mockFetchHub.mockImplementation(
+      () =>
+        new Promise<ChampionshipHub>((resolve) => {
+          hubCalls += 1
+          resolveHub = resolve
+        }),
+    )
+
+    fireEvent.click(screen.getByRole('button', { name: 'Retry' }))
+    await waitFor(() => expect(screen.getByRole('button', { name: 'Retrying…' })).toBeDisabled())
+    expect(screen.getByRole('button', { name: 'Retrying…' })).toHaveAttribute('aria-busy', 'true')
+    fireEvent.click(screen.getByRole('button', { name: 'Retrying…' }))
+    expect(meetingsCalls).toBe(2)
+    expect(hubCalls).toBe(2)
+
+    resolveMeetings([bahrain, monaco])
+    resolveHub(hub)
+    await waitFor(() => expect(screen.queryByTestId('briefing-data-notice')).not.toBeInTheDocument())
+    expect(screen.getByText('Verstappen sets the pace in Bahrain')).toBeInTheDocument()
+  })
+
+  it('preserves Stale hub over routine local News when sources conflict', async () => {
+    const localNews = [...newsItems]
+    rememberResponseAvailability(localNews, { source: 'local', freshness: 'local' })
+    const staleHub = { ...hub }
+    rememberResponseAvailability(staleHub, { source: 'openf1', freshness: 'stale' })
+    mockFetchNews.mockResolvedValue(localNews)
+    mockFetchHub.mockResolvedValue(staleHub)
+
+    renderPage()
+
+    await waitFor(() => expect(screen.getByTestId('briefing-data-notice')).toHaveTextContent(/Stale/i))
+    expect(screen.getByText('Verstappen sets the pace in Bahrain')).toBeInTheDocument()
+    expect(screen.queryByTestId('briefing-error')).not.toBeInTheDocument()
+  })
 })

frontend/src/test/ChampionshipPage.test.tsx

@@ -4,6 +4,7 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { RouterProvider, createRouter, createRootRoute, createRoute } from '@tanstack/react-router'
 import { ChampionshipPage } from '../pages/ChampionshipPage'
 import type { ChampHubDriver, ChampHubTeam, ChampionshipHub } from '../types'
+import { rememberResponseAvailability } from '../lib/fetch'
 
 vi.mock('../api', () => ({
   fetchSeasons: vi.fn(),
@@ -226,4 +227,36 @@ describe('ChampionshipPage', () => {
     expect(rows[1]).toHaveTextContent('Red Bull')
     expect(rows[1]).toHaveTextContent('9–1')
   })
+
+  it('shows a non-blocking stale notice above usable standings', async () => {
+    const staleHub = { ...hub }
+    rememberResponseAvailability(staleHub, { source: 'openf1', freshness: 'stale' })
+    mockFetchHub.mockResolvedValue(staleHub)
+    renderPage()
+
+    await waitFor(() => expect(screen.getByTestId('championship')).toBeInTheDocument())
+    expect(screen.getByTestId('championship-data-notice')).toHaveTextContent(/Stale/i)
+    expect(screen.getByTestId('champ-view-drivers')).toBeInTheDocument()
+    expect(screen.getAllByText('VER').length).toBeGreaterThan(0)
+  })
+
+  it('shows a non-blocking partial notice when reported', async () => {
+    const partialHub = { ...hub }
+    rememberResponseAvailability(partialHub, { source: 'openf1', freshness: 'partial' })
+    mockFetchHub.mockResolvedValue(partialHub)
+    renderPage()
+
+    await waitFor(() => expect(screen.getByTestId('championship-data-notice')).toBeInTheDocument())
+    expect(screen.getByTestId('championship-data-notice')).toHaveTextContent(/Partial/i)
+  })
+
+  it('shows a non-blocking local notice when reported', async () => {
+    const localHub = { ...hub }
+    rememberResponseAvailability(localHub, { source: 'local', freshness: 'local' })
+    mockFetchHub.mockResolvedValue(localHub)
+    renderPage()
+
+    await waitFor(() => expect(screen.getByTestId('championship-data-notice')).toBeInTheDocument())
+    expect(screen.getByTestId('championship-data-notice')).toHaveTextContent(/Local/i)
+  })
 })

frontend/src/test/CommandCenterPage.test.tsx

@@ -1,245 +0,0 @@
-import { describe, it, expect, vi, beforeEach } from 'vitest'
-import { render, screen, waitFor } from '@testing-library/react'
-import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
-import { RouterProvider, createRouter, createRootRoute, createRoute } from '@tanstack/react-router'
-import { CommandCenterPage } from '../pages/CommandCenterPage'
-import type { DatasetInfo, Meeting, Weekend } from '../types'
-
-vi.mock('../api', () => ({
-  fetchSeasons: vi.fn(),
-  fetchLocalMeetings: vi.fn(),
-  fetchSeasonMeetings: vi.fn(),
-  fetchSessions: vi.fn(),
-  fetchWeekend: vi.fn(),
-  fetchLiveState: vi.fn(),
-  fetchChampionshipHub: vi.fn(),
-  fetchRaceHub: vi.fn(),
-}))
-
-import {
-  fetchSeasons,
-  fetchLocalMeetings,
-  fetchSeasonMeetings,
-  fetchSessions,
-  fetchWeekend,
-  fetchLiveState,
-  fetchChampionshipHub,
-  fetchRaceHub,
-} from '../api'
-
-const mockFetchSeasons = vi.mocked(fetchSeasons)
-const mockFetchLocalMeetings = vi.mocked(fetchLocalMeetings)
-const mockFetchSeasonMeetings = vi.mocked(fetchSeasonMeetings)
-const mockFetchSessions = vi.mocked(fetchSessions)
-const mockFetchWeekend = vi.mocked(fetchWeekend)
-const mockFetchLiveState = vi.mocked(fetchLiveState)
-const mockFetchChampionshipHub = vi.mocked(fetchChampionshipHub)
-const mockFetchRaceHub = vi.mocked(fetchRaceHub)
-
-const meeting: Meeting = {
-  meeting_key: 1229,
-  meeting_name: 'Monaco',
-  meeting_official_name: 'FORMULA 1 GRAND PRIX DE MONACO 2025',
-  location: 'Monaco',
-  country_name: 'Monaco',
-  country_code: 'MON',
-  country_flag: '',
-  circuit_short_name: 'Monaco',
-  date_start: '2025-05-23T00:00:00+00:00',
-  date_end: '2025-05-25T00:00:00+00:00',
-  year: 2025,
-}
-
-const fullDatasets: Record<string, DatasetInfo> = {
-  meeting: { status: 'available', source: 'local', count: 1 },
-  session: { status: 'available', source: 'local', count: 1 },
-  drivers: { status: 'available', source: 'local', count: 20 },
-  results: { status: 'available', source: 'local', count: 20 },
-  starting_grid: { status: 'available', source: 'local', count: 20 },
-  stints: { status: 'available', source: 'local', count: 2 },
-  pit_stops: { status: 'available', source: 'local', count: 1 },
-  positions: { status: 'available', source: 'local', count: 3 },
-  race_control: { status: 'available', source: 'local', count: 1 },
-  weather: { status: 'available', source: 'local', count: 1 },
-  laps: { status: 'available', source: 'local', count: 1 },
-}
-
-const weekend: Weekend = {
-  source: 'local',
-  meeting_key: 1229,
-  meeting,
-  default_session_key: 9472,
-  sessions: [
-    {
-      session: {
-        session_key: 9472,
-        session_name: 'Race',
-        session_type: 'Race',
-        meeting_key: 1229,
-        date_start: '2025-05-25T13:00:00+00:00',
-        date_end: '2025-05-25T15:00:00+00:00',
-        gmt_offset: '02:00:00',
-      },
-      source: 'local',
-      datasets: fullDatasets,
-    },
-  ],
-}
-
-function renderPage() {
-  const queryClient = new QueryClient({
-    defaultOptions: { queries: { retry: false } },
-  })
-
-  const rootRoute = createRootRoute({
-    component: () => (
-      <QueryClientProvider client={queryClient}>
-        <CommandCenterPage />
-      </QueryClientProvider>
-    ),
-  })
-
-  const indexRoute = createRoute({
-    getParentRoute: () => rootRoute,
-    path: '/',
-    component: CommandCenterPage,
-  })
-
-  const router = createRouter({ routeTree: rootRoute.addChildren([indexRoute]) })
-
-  return render(<RouterProvider router={router} />)
-}
-
-describe('CommandCenterPage', () => {
-  beforeEach(() => {
-    vi.clearAllMocks()
-    mockFetchLiveState.mockResolvedValue({ is_live: false, data: null })
-    mockFetchSessions.mockResolvedValue([])
-    mockFetchChampionshipHub.mockResolvedValue({
-      season: 2025,
-      round: 1,
-      total_rounds: 1,
-      rounds_left: 0,
-      last_race: 'Monaco',
-      round_labels: ['R1'],
-      drivers: [],
-      teams: [],
-    })
-    mockFetchRaceHub.mockResolvedValue({
-      source: 'local',
-      session_key: 9472,
-      datasets: fullDatasets,
-      results: [
-        {
-          driver_number: 1,
-          position: 1,
-          name_acronym: 'VER',
-          full_name: 'Max Verstappen',
-          team_name: 'Red Bull Racing',
-          team_colour: '3671c6',
-          dnf: false,
-          dns: false,
-          dsq: false,
-          duration: 7200,
-          gap_to_leader: null,
-          number_of_laps: 78,
-          points: 25,
-          session_key: 9472,
-          meeting_key: 1229,
-        },
-      ],
-      starting_grid: [],
-      drivers: [],
-      stints: [],
-      pit_stops: [],
-      positions: [],
-      race_control: [],
-      weather: [],
-      laps: [],
-      chapters: [],
-    })
-  })
-
-  it('shows empty state when no seasons are ingested', async () => {
-    mockFetchSeasons.mockResolvedValue([])
-
-    renderPage()
-
-    await waitFor(() => {
-      expect(screen.getByTestId('command-center-empty')).toBeInTheDocument()
-    })
-    expect(screen.getByText('No local data yet')).toBeInTheDocument()
-  })
-
-  it('shows weekend identity band and schedule when data exists', async () => {
-    mockFetchSeasons.mockResolvedValue([2025])
-    mockFetchLocalMeetings.mockResolvedValue([meeting])
-    mockFetchSeasonMeetings.mockResolvedValue([meeting])
-    mockFetchWeekend.mockResolvedValue(weekend)
-
-    renderPage()
-
-    await waitFor(() => {
-      expect(screen.getByTestId('command-center')).toBeInTheDocument()
-    })
-
-    await waitFor(() => {
-      expect(screen.getByTestId('cc-session-9472')).toBeInTheDocument()
-    })
-    expect(screen.getByTestId('cc-focus')).toHaveTextContent('Monaco')
-    expect(screen.getByTestId('cc-season-calendar')).toHaveTextContent('Season Calendar')
-    expect(screen.getByTestId('cc-calendar-1229')).toHaveTextContent('R01')
-    expect(screen.getByText('No live session')).toBeInTheDocument()
-    expect(screen.getByTestId('hero-last-race-link')).toHaveTextContent('Monaco')
-  })
-
-  it('uses OpenF1 calendar metadata to focus the current weekend when local ingest is behind', async () => {
-    const canada = {
-      ...meeting,
-      meeting_key: 1301,
-      meeting_name: 'Canada',
-      country_name: 'Canada',
-      country_code: 'CAN',
-      circuit_short_name: 'Montreal',
-      date_start: '2026-05-22T00:00:00+00:00',
-      date_end: '2026-05-24T23:59:59+00:00',
-      year: 2026,
-    }
-    const monaco = {
-      ...meeting,
-      meeting_key: 1302,
-      meeting_name: 'Monaco',
-      date_start: '2026-06-05T00:00:00+00:00',
-      date_end: '2026-06-07T23:59:59+00:00',
-      year: 2026,
-    }
-
-    vi.setSystemTime(new Date('2026-06-06T15:15:00Z'))
-    mockFetchSeasons.mockResolvedValue([2026])
-    mockFetchLocalMeetings.mockResolvedValue([canada])
-    mockFetchSeasonMeetings.mockResolvedValue([canada, monaco])
-    mockFetchWeekend.mockResolvedValue({ ...weekend, meeting: canada, meeting_key: canada.meeting_key })
-    mockFetchSessions.mockResolvedValue([
-      {
-        session_key: 9602,
-        session_name: 'Qualifying',
-        session_type: 'Qualifying',
-        meeting_key: monaco.meeting_key,
-        date_start: '2026-06-06T15:00:00+00:00',
-        date_end: '2026-06-06T16:00:00+00:00',
-        gmt_offset: '02:00:00',
-      },
-    ])
-
-    renderPage()
-
-    await waitFor(() => {
-      expect(screen.getByTestId('cc-focus')).toHaveTextContent('Monaco')
-    })
-    expect(screen.getByTestId('cc-focus')).toHaveTextContent('Live now')
-    expect(screen.getByTestId('cc-session-9602')).toHaveTextContent('On track')
-    expect(screen.getByTestId('hero-live-link')).toHaveAttribute('href', '/live')
-
-    vi.useRealTimers()
-  })
-})

frontend/src/test/DataLibraryPage.test.tsx

@@ -116,7 +116,7 @@ describe('DataLibraryPage', () => {
 
     expect(await screen.findByTestId('data-library')).toBeInTheDocument()
     await waitFor(() => {
-      expect(mockFetchLocalMeetings).toHaveBeenCalledWith(2025)
+      expect(mockFetchLocalMeetings).toHaveBeenCalledWith(2025, expect.any(AbortSignal))
     })
 
     expect(await screen.findByTestId('meeting-detail')).toBeInTheDocument()

frontend/src/test/DriverProfilePage.test.tsx

@@ -120,7 +120,7 @@ describe('DriverProfilePage', () => {
 
     // With an explicit year, the seasons list is not needed.
     expect(mockFetchSeasons).not.toHaveBeenCalled()
-    expect(mockFetchSummary).toHaveBeenCalledWith(1, 2025)
+    expect(mockFetchSummary).toHaveBeenCalledWith(1, 2025, expect.any(AbortSignal))
   })
 
   it('defaults to the latest season when no year is given', async () => {
@@ -129,16 +129,19 @@ describe('DriverProfilePage', () => {
     await waitFor(() => {
       expect(screen.getByTestId('driver-profile')).toBeInTheDocument()
     })
-    expect(mockFetchSummary).toHaveBeenCalledWith(1, 2025)
+    expect(mockFetchSummary).toHaveBeenCalledWith(1, 2025, expect.any(AbortSignal))
   })
 
-  it('shows the API error message on failure', async () => {
+  it('shows a user-facing error with retry instead of raw API jargon', async () => {
     mockFetchSummary.mockRejectedValue(new Error('API 404: Not Found'))
     renderPage({ driverNumber: 99, year: 2025 })
 
     await waitFor(() => {
-      expect(screen.getByText('API 404: Not Found')).toBeInTheDocument()
+      expect(screen.getByTestId('driver-profile-error')).toBeInTheDocument()
     })
+    expect(screen.queryByText(/API 404/i)).not.toBeInTheDocument()
+    expect(screen.getByRole('button', { name: 'Retry' })).toBeInTheDocument()
+    expect(screen.getByTestId('driver-profile-error')).toHaveTextContent(/Something went wrong/i)
   })
 
   it('shows empty states when no rounds are completed', async () => {

frontend/src/test/LiveComponents.test.tsx

@@ -209,32 +209,6 @@ describe('TimingTower', () => {
     expect(screen.getByText('DRS range')).toBeInTheDocument()
   })
 
-  it('derives a gap to P1 from best laps when the practice feed omits GapToLeader', () => {
-    const practiceRows = [
-      makeRow('1', 1, 'VER', { BestLapTime: '1:45.944', GapToLeader: '' }),
-      makeRow('4', 2, 'NOR', { BestLapTime: '1:46.134', GapToLeader: '' }),
-      makeRow('16', 3, 'LEC', { BestLapTime: '', GapToLeader: '' }),
-    ]
-    render(
-      <TimingTower
-        rows={practiceRows}
-        session={{
-          MeetingName: 'Belgian Grand Prix',
-          CircuitName: 'Spa',
-          SessionType: 'Practice',
-          SessionName: 'Practice 2',
-          Path: '',
-        }}
-      />,
-    )
-    // Leader shows a clear leader marker, not a fabricated gap.
-    expect(screen.getByText('VER').closest('tr')).toHaveTextContent('—')
-    expect(screen.getByText('+0.190')).toBeInTheDocument()
-    // A driver without a valid best lap gets no invented gap.
-    const lecRow = screen.getByText('LEC').closest('tr')!
-    expect(lecRow).not.toHaveTextContent('+')
-  })
-
   it('renders the SQ1 cutoff after P17 and marks rows below as at risk', () => {
     const sprintRows = Array.from({ length: 22 }, (_, index) =>
       makeRow(String(index + 1), index + 1, `D${index + 1}`),

frontend/src/test/LiveHandoff.test.tsx

@@ -0,0 +1,289 @@
+import { render, screen } from '@testing-library/react'
+import { describe, expect, it, vi } from 'vitest'
+import {
+  LiveHandoff,
+  analysisIsReady,
+  handoffAnalysisSession,
+  shouldPollHandoffAnalysis,
+} from '../components/live/LiveHandoff'
+import type { LiveTimingRow } from '../lib/live'
+import type { ContextSession, WeekendContext } from '../types'
+
+function session(key: number, name: string, type = name): ContextSession['session'] {
+  return {
+    session_key: key,
+    session_name: name,
+    session_type: type,
+    meeting_key: 1,
+    date_start: '2026-07-05T14:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    gmt_offset: '',
+  }
+}
+
+function contextSession(
+  key: number,
+  name: string,
+  localAnalysis: string,
+): ContextSession {
+  return {
+    session: session(key, name),
+    availability: {
+      schedule: 'available',
+      live_transport: 'unknown',
+      live_session: 'inactive',
+      archive: 'unavailable',
+      local_analysis: localAnalysis,
+      freshness: 'fresh',
+      limitations: [],
+    },
+  }
+}
+
+const baseContext: WeekendContext = {
+  temporal_state: 'session_settling',
+  focus_meeting: {
+    meeting_key: 1,
+    meeting_name: 'British Grand Prix',
+    meeting_official_name: 'British Grand Prix',
+    location: 'Silverstone',
+    country_name: 'UK',
+    country_code: 'GB',
+    country_flag: '',
+    circuit_short_name: 'Silverstone',
+    date_start: '2026-07-03T09:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    year: 2026,
+  },
+  championship_round: 1,
+  total_championship_rounds: 1,
+}
+
+/** Canonical contract: archive-only just-finished Race vs older ready Practice. */
+function archiveOnlySettlingContext(previousAnalysis: string): WeekendContext {
+  return {
+    ...baseContext,
+    // Older already-ingested session remains the default analysis target.
+    default_analysis_session: contextSession(10, 'Practice 1', 'complete'),
+    // Just-finished Race is archive-complete but not yet analysis-ready.
+    previous_completed_session: contextSession(99, 'Race', previousAnalysis),
+    next_session: contextSession(12, 'Qualifying', 'not_applicable'),
+  }
+}
+
+const rows: LiveTimingRow[] = [
+  { RacingNumber: '1', Position: 1, Driver: { RacingNumber: '1', Position: 1 } as never, Info: { Tla: 'VER' } as never },
+  { RacingNumber: '4', Position: 2, Driver: { RacingNumber: '4', Position: 2 } as never, Info: { Tla: 'NOR' } as never },
+]
+
+describe('analysisIsReady', () => {
+  it('is true only when local analysis is complete', () => {
+    expect(analysisIsReady(contextSession(11, 'Race', 'complete'))).toBe(true)
+    expect(analysisIsReady(contextSession(11, 'Race', 'pending'))).toBe(false)
+    expect(analysisIsReady(contextSession(11, 'Race', 'partial'))).toBe(false)
+    expect(analysisIsReady(undefined)).toBe(false)
+  })
+})
+
+describe('handoffAnalysisSession', () => {
+  it('settling prefers previous_completed_session over an older default', () => {
+    const ctx = archiveOnlySettlingContext('pending')
+    const analysis = handoffAnalysisSession(ctx, 'settling')
+    expect(analysis?.session.session_key).toBe(99)
+    expect(analysis?.session.session_name).toBe('Race')
+    expect(analysisIsReady(analysis)).toBe(false)
+  })
+
+  it('inactive prefers default_analysis_session (shared analysisSessionKey)', () => {
+    const ctx = archiveOnlySettlingContext('pending')
+    const analysis = handoffAnalysisSession(ctx, 'inactive')
+    expect(analysis?.session.session_key).toBe(10)
+    expect(analysis?.session.session_name).toBe('Practice 1')
+  })
+
+  it('settling falls back to default when previous is absent', () => {
+    const ctx = {
+      ...baseContext,
+      default_analysis_session: contextSession(11, 'Race', 'pending'),
+    }
+    expect(handoffAnalysisSession(ctx, 'settling')?.session.session_key).toBe(11)
+  })
+})
+
+describe('shouldPollHandoffAnalysis', () => {
+  it('keeps polling when previous is pending even if default is already complete', () => {
+    expect(shouldPollHandoffAnalysis(archiveOnlySettlingContext('pending'))).toBe(true)
+  })
+
+  it('stops polling once the just-finished previous session is ready', () => {
+    expect(shouldPollHandoffAnalysis(archiveOnlySettlingContext('complete'))).toBe(false)
+  })
+})
+
+describe('LiveHandoff settling', () => {
+  it('shows SESSION SETTLING with a pending analysis action while ingesting', () => {
+    render(
+      <LiveHandoff
+        phase="settling"
+        transport="connected"
+        context={{
+          ...baseContext,
+          previous_completed_session: contextSession(11, 'Race', 'pending'),
+        }}
+        rows={rows}
+        capturedAt="2026-07-05T16:02:00Z"
+        hasArchive
+        onViewArchive={vi.fn()}
+      />,
+    )
+
+    expect(screen.getByTestId('live-settling')).toBeInTheDocument()
+    expect(screen.getByText('SESSION SETTLING')).toBeInTheDocument()
+    expect(screen.getByTestId('live-handoff-captured')).toHaveTextContent('Final feed snapshot captured')
+    const action = screen.getByTestId('live-handoff-analysis')
+    expect(action).toHaveAttribute('href', '/race-hub?session_key=11')
+    expect(action).toHaveAttribute('data-ready', 'false')
+    expect(action).toHaveTextContent('Open Race analysis')
+    expect(action).toHaveTextContent(/analysis will fill in as data ingests/i)
+    // Provisional final order from the retained snapshot.
+    expect(screen.getByTestId('live-handoff-snapshot')).toHaveTextContent('VER')
+  })
+
+  it('links/labels/readiness follow archive-only previous, not an older ready default', () => {
+    render(
+      <LiveHandoff
+        phase="settling"
+        transport="connected"
+        context={archiveOnlySettlingContext('pending')}
+        rows={rows}
+        capturedAt="2026-07-05T16:02:00Z"
+        hasArchive
+        onViewArchive={vi.fn()}
+      />,
+    )
+
+    const action = screen.getByTestId('live-handoff-analysis')
+    expect(action).toHaveAttribute('href', '/race-hub?session_key=99')
+    expect(action).toHaveAttribute('data-ready', 'false')
+    expect(action).toHaveTextContent('Open Race analysis')
+    expect(action).toHaveTextContent(/Settling — analysis will fill in as data ingests/i)
+    expect(action).not.toHaveTextContent('Practice 1')
+    expect(action).not.toHaveTextContent(/full timing, strategy & story ready/i)
+  })
+
+  it('flips to analysis-ready once local ingestion completes', () => {
+    render(
+      <LiveHandoff
+        phase="settling"
+        transport="connected"
+        context={{
+          ...baseContext,
+          previous_completed_session: contextSession(11, 'Race', 'complete'),
+        }}
+        rows={rows}
+        capturedAt="2026-07-05T16:02:00Z"
+        hasArchive={false}
+        onViewArchive={vi.fn()}
+      />,
+    )
+    const action = screen.getByTestId('live-handoff-analysis')
+    expect(action).toHaveAttribute('data-ready', 'true')
+    expect(action).toHaveTextContent(/full timing, strategy & story ready/i)
+  })
+
+  it('never renders live/connected chrome or a countdown in settling', () => {
+    const { container } = render(
+      <LiveHandoff
+        phase="settling"
+        transport="connected"
+        context={{
+          ...baseContext,
+          previous_completed_session: contextSession(11, 'Race', 'complete'),
+        }}
+        rows={rows}
+        capturedAt="2026-07-05T16:02:00Z"
+        hasArchive
+        onViewArchive={vi.fn()}
+      />,
+    )
+    expect(screen.queryByText('LIVE SESSION')).not.toBeInTheDocument()
+    expect(screen.queryByTestId('live-clock')).not.toBeInTheDocument()
+    expect(container.querySelector('.live-session-flag-live')).toBeNull()
+  })
+
+  it('uses non-settling readiness copy when inactive and analysis is still ingesting', () => {
+    render(
+      <LiveHandoff
+        phase="inactive"
+        transport="connected"
+        context={{ ...baseContext, default_analysis_session: contextSession(11, 'Race', 'pending') }}
+        rows={[]}
+        hasArchive={false}
+        onViewArchive={vi.fn()}
+      />,
+    )
+    const action = screen.getByTestId('live-handoff-analysis')
+    expect(action).toHaveAttribute('data-ready', 'false')
+    expect(action).toHaveTextContent(/analysis will fill in as data ingests/i)
+    expect(action).not.toHaveTextContent(/^Settling/i)
+  })
+})
+
+describe('LiveHandoff inactive', () => {
+  it('uses shared next + recap context instead of a telemetry-offline dead end', () => {
+    render(
+      <LiveHandoff
+        phase="inactive"
+        transport="connected"
+        context={{
+          ...baseContext,
+          temporal_state: 'between_sessions',
+          default_analysis_session: contextSession(11, 'Practice 1', 'complete'),
+          next_session: contextSession(12, 'Qualifying', 'not_applicable'),
+          previous_completed_session: contextSession(10, 'Practice 2', 'complete'),
+        }}
+        rows={[]}
+        hasArchive={false}
+        onViewArchive={vi.fn()}
+      />,
+    )
+    expect(screen.getByTestId('live-inactive')).toBeInTheDocument()
+    expect(screen.getByText('NO LIVE SESSION')).toBeInTheDocument()
+    expect(screen.getByTestId('live-handoff-next')).toHaveTextContent('Qualifying')
+    expect(screen.getByTestId('live-handoff-recap')).toHaveTextContent('Practice 2')
+    // No provisional-order snapshot when inactive.
+    expect(screen.queryByTestId('live-handoff-snapshot')).not.toBeInTheDocument()
+  })
+
+  it('does not duplicate the recap card when previous equals the analysis target', () => {
+    render(
+      <LiveHandoff
+        phase="inactive"
+        transport="connected"
+        context={{
+          ...baseContext,
+          default_analysis_session: contextSession(11, 'Race', 'complete'),
+          previous_completed_session: contextSession(11, 'Race', 'complete'),
+        }}
+        rows={[]}
+        hasArchive={false}
+        onViewArchive={vi.fn()}
+      />,
+    )
+    expect(screen.queryByTestId('live-handoff-recap')).not.toBeInTheDocument()
+  })
+
+  it('falls back to Weekend when the context has nothing to offer', () => {
+    render(
+      <LiveHandoff
+        phase="inactive"
+        transport="error"
+        context={{ temporal_state: 'no_season', championship_round: 0, total_championship_rounds: 0 }}
+        rows={[]}
+        hasArchive={false}
+        onViewArchive={vi.fn()}
+      />,
+    )
+    expect(screen.getByTestId('live-handoff-fallback')).toHaveTextContent('Weekend')
+  })
+})

frontend/src/test/LiveTimingPage.test.tsx

@@ -1,32 +1,34 @@
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
-import { fireEvent, render, screen, waitFor } from '@testing-library/react'
+import { act, fireEvent, render, screen, waitFor } from '@testing-library/react'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
-import { LiveTimingPage } from '../pages/LiveTimingPage'
+import { LiveTimingPage, WEEKEND_CONTEXT_POLL_MS } from '../pages/LiveTimingPage'
-import type { LiveStateResponse, LiveStreamData } from '../types'
+import type { LiveStateResponse, LiveStreamData, WeekendContext } from '../types'
 
 vi.mock('../api', () => ({
   fetchLiveState: vi.fn(),
   fetchLiveTrackOutline: vi.fn(),
+  fetchWeekendContext: vi.fn(),
 }))
 
-import { fetchLiveState, fetchLiveTrackOutline } from '../api'
+import { fetchLiveState, fetchLiveTrackOutline, fetchWeekendContext } from '../api'
 
 const mockFetchLiveState = vi.mocked(fetchLiveState)
 const mockFetchLiveTrackOutline = vi.mocked(fetchLiveTrackOutline)
+const mockFetchWeekendContext = vi.mocked(fetchWeekendContext)
 
+// A MockEventSource that opens on construct but never emits a snapshot, so the
+// initial /api/v1/live/state query drives the rendered phase.
 class MockEventSource {
   onopen: (() => void) | null = null
   onerror: (() => void) | null = null
-
   constructor() {
     setTimeout(() => this.onopen?.(), 0)
   }
-
   addEventListener() {}
   close() {}
 }
 
-const archivedSnapshot: LiveStreamData = {
+const raceSnapshot: LiveStreamData = {
   Drivers: {
     '1': {
       RacingNumber: '1',
@@ -63,19 +65,10 @@ const archivedSnapshot: LiveStreamData = {
       LastName: 'Verstappen',
     },
   },
-  Tyres: {
+  Tyres: { '1': { Compound: 'HARD', New: false, Age: 12 } },
-    '1': { Compound: 'HARD', New: false, Age: 12 },
-  },
   Telemetry: {},
   RCMessages: [],
-  Weather: {
+  Weather: { AirTemp: 22, TrackTemp: 41, Humidity: 58, WindSpeed: 3, WindDir: 180, Rainfall: false },
-    AirTemp: 22,
-    TrackTemp: 41,
-    Humidity: 58,
-    WindSpeed: 3,
-    WindDir: 180,
-    Rainfall: false,
-  },
   Session: {
     MeetingName: 'Testonia Grand Prix',
     CircuitName: 'Testring',
@@ -84,9 +77,9 @@ const archivedSnapshot: LiveStreamData = {
     Path: '',
   },
   TeamRadio: [],
-  SessionStatus: 'Finished',
+  SessionStatus: 'Started',
   TrackStatus: '1',
-  CurrentLap: 57,
+  CurrentLap: 30,
   TotalLaps: 57,
   Clock: '',
   ClockRefTime: '',
@@ -94,17 +87,93 @@ const archivedSnapshot: LiveStreamData = {
   Stints: {},
 }
 
-function renderPage(response: LiveStateResponse) {
+function weekendContext(localAnalysis: string): WeekendContext {
-  const queryClient = new QueryClient({
+  return {
-    defaultOptions: { queries: { retry: false } },
+    temporal_state: 'session_settling',
-  })
+    focus_meeting: {
+      meeting_key: 1,
+      meeting_name: 'Testonia Grand Prix',
+      meeting_official_name: 'Testonia Grand Prix',
+      location: 'Testring',
+      country_name: 'Testonia',
+      country_code: 'TS',
+      country_flag: '',
+      circuit_short_name: 'Testring',
+      date_start: '2026-07-03T09:00:00Z',
+      date_end: '2026-07-05T16:00:00Z',
+      year: 2026,
+    },
+    previous_completed_session: {
+      session: {
+        session_key: 99,
+        session_name: 'Race',
+        session_type: 'Race',
+        meeting_key: 1,
+        date_start: '2026-07-05T14:00:00Z',
+        date_end: '2026-07-05T16:00:00Z',
+        gmt_offset: '',
+      },
+      availability: {
+        schedule: 'available',
+        live_transport: 'unknown',
+        live_session: 'inactive',
+        archive: 'available',
+        local_analysis: localAnalysis,
+        freshness: 'fresh',
+        limitations: [],
+      },
+    },
+    championship_round: 1,
+    total_championship_rounds: 1,
+  }
+}
+
+/** Just-finished archive-only Race + older already-ready Practice default. */
+function archiveOnlySettlingContext(previousAnalysis: string): WeekendContext {
+  return {
+    ...weekendContext(previousAnalysis),
+    default_analysis_session: {
+      session: {
+        session_key: 10,
+        session_name: 'Practice 1',
+        session_type: 'Practice',
+        meeting_key: 1,
+        date_start: '2026-07-04T12:00:00Z',
+        date_end: '2026-07-04T13:00:00Z',
+        gmt_offset: '',
+      },
+      availability: {
+        schedule: 'available',
+        live_transport: 'unknown',
+        live_session: 'inactive',
+        archive: 'available',
+        local_analysis: 'complete',
+        freshness: 'fresh',
+        limitations: [],
+      },
+    },
+  }
+}
+
+function renderPage(
+  response: LiveStateResponse,
+  context?: WeekendContext,
+  options: { setWeekendContext?: boolean } = {},
+) {
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } })
   mockFetchLiveState.mockResolvedValue(response)
   mockFetchLiveTrackOutline.mockResolvedValue({
     circuit_key: 1,
     points: [],
     bounds: { minX: 0, maxX: 1, minY: 0, maxY: 1 },
   })
-
+  // Allow callers to pre-configure the weekend-context mock (e.g. pending→complete
+  // polling) without this helper overwriting the chain.
+  if (options.setWeekendContext !== false) {
+    mockFetchWeekendContext.mockResolvedValue(
+      context ?? { temporal_state: 'no_season', championship_round: 0, total_championship_rounds: 0 },
+    )
+  }
   return render(
     <QueryClientProvider client={queryClient}>
       <LiveTimingPage />
@@ -112,7 +181,7 @@ function renderPage(response: LiveStateResponse) {
   )
 }
 
-describe('LiveTimingPage archive mode', () => {
+describe('LiveTimingPage', () => {
   beforeEach(() => {
     vi.clearAllMocks()
     Object.defineProperty(window, 'EventSource', {
@@ -122,68 +191,365 @@ describe('LiveTimingPage archive mode', () => {
     })
   })
 
-  it('keeps archived snapshots behind the View Last Session action', async () => {
+  afterEach(() => {
-    renderPage({
+    vi.useRealTimers()
+  })
+
+  it('renders the live timing tower for an active session', async () => {
+    renderPage({ is_live: true, data: raceSnapshot })
+    expect(await screen.findByText('Timing Tower')).toBeInTheDocument()
+    expect(screen.getByTestId('live-page')).toHaveAttribute('data-phase', 'live')
+    expect(screen.getByTestId('live-session-flag')).toHaveTextContent('LIVE SESSION')
+    expect(screen.getByTestId('live-feed-health')).toBeInTheDocument()
+    expect(screen.getAllByText('VER').length).toBeGreaterThan(0)
+  })
+
+  it('enters the settling handoff (not archive) when the session ends cleanly', async () => {
+    renderPage(
+      {
         is_live: false,
         data: null,
-      last_snapshot: archivedSnapshot,
+        last_snapshot: { ...raceSnapshot, SessionStatus: 'Finished' },
-      last_positions: {
+        last_snapshot_at: '2026-07-05T16:02:00Z',
-        '1': { x: 10, y: 20, z: 0, status: 'OnTrack' },
       },
-      last_snapshot_at: '2026-07-04T14:00:00Z',
+      weekendContext('pending'),
+    )
+
+    const settling = await screen.findByTestId('live-settling')
+    expect(settling).toBeInTheDocument()
+    expect(screen.getByTestId('live-page')).toHaveAttribute('data-phase', 'settling')
+    // Just-finished previous_completed_session drives the primary action target.
+    await waitFor(() =>
+      expect(screen.getByTestId('live-handoff-analysis')).toHaveAttribute(
+        'href',
+        '/race-hub?session_key=99',
+      ),
+    )
+    // The timing tower is not shown while settling — it is a handoff surface.
+    expect(screen.queryByText('Timing Tower')).not.toBeInTheDocument()
   })
 
-    expect(await screen.findByTestId('live-empty')).toHaveTextContent('No live session active')
+  it('settles against archive-only previous, not an older ready default_analysis_session', async () => {
+    vi.useFakeTimers({ shouldAdvanceTime: true })
+    mockFetchWeekendContext
+      .mockResolvedValueOnce(archiveOnlySettlingContext('pending'))
+      .mockResolvedValue(archiveOnlySettlingContext('complete'))
+
+    renderPage(
+      {
+        is_live: false,
+        data: null,
+        last_snapshot: { ...raceSnapshot, SessionStatus: 'Finished' },
+        last_snapshot_at: '2026-07-05T16:02:00Z',
+      },
+      undefined,
+      { setWeekendContext: false },
+    )
+
+    const action = await screen.findByTestId('live-handoff-analysis')
+    expect(action).toHaveAttribute('href', '/race-hub?session_key=99')
+    expect(action).toHaveAttribute('data-ready', 'false')
+    expect(action).toHaveTextContent('Open Race analysis')
+    expect(action).not.toHaveTextContent('Practice 1')
+
+    // Older default is already complete — polling must continue for previous.
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(WEEKEND_CONTEXT_POLL_MS + 500)
+    })
+
+    await waitFor(() =>
+      expect(screen.getByTestId('live-handoff-analysis')).toHaveAttribute('data-ready', 'true'),
+    )
+    expect(screen.getByTestId('live-handoff-analysis')).toHaveAttribute(
+      'href',
+      '/race-hub?session_key=99',
+    )
+    expect(mockFetchWeekendContext.mock.calls.length).toBeGreaterThan(1)
+  })
+
+  it('flips settling → analysis-ready when polling sees ingestion complete', async () => {
+    vi.useFakeTimers({ shouldAdvanceTime: true })
+    // First fetch: pending. Subsequent polls: complete.
+    mockFetchWeekendContext
+      .mockResolvedValueOnce(weekendContext('pending'))
+      .mockResolvedValue(weekendContext('complete'))
+
+    renderPage(
+      {
+        is_live: false,
+        data: null,
+        last_snapshot: { ...raceSnapshot, SessionStatus: 'Finished' },
+        last_snapshot_at: '2026-07-05T16:02:00Z',
+      },
+      undefined,
+      { setWeekendContext: false },
+    )
+
+    const action = await screen.findByTestId('live-handoff-analysis')
+    expect(action).toHaveAttribute('data-ready', 'false')
+    expect(action).toHaveTextContent(/analysis will fill in as data ingests/i)
+
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(WEEKEND_CONTEXT_POLL_MS + 500)
+    })
+
+    await waitFor(() =>
+      expect(screen.getByTestId('live-handoff-analysis')).toHaveAttribute('data-ready', 'true'),
+    )
+    expect(screen.getByTestId('live-handoff-analysis')).toHaveTextContent(
+      /full timing, strategy & story ready/i,
+    )
+  })
+
+  it('retains the last snapshot with a disconnected warning (not settling) on a feed drop', async () => {
+    // is_live=false but the retained snapshot has a NON-terminal SessionStatus:
+    // the FIA feed dropped while the session was still active.
+    renderPage(
+      {
+        is_live: false,
+        data: null,
+        last_snapshot: { ...raceSnapshot, SessionStatus: 'Started' },
+        last_snapshot_at: '2026-07-05T15:30:00Z',
+      },
+      weekendContext('pending'),
+    )
+
+    expect(await screen.findByTestId('live-disconnected-strip')).toHaveTextContent(
+      /showing the last live data/i,
+    )
+    expect(screen.getByTestId('live-page')).toHaveAttribute('data-phase', 'disconnected')
+    // The retained live tower stays visible; we never fell into settling/archive.
+    expect(screen.getByText('Timing Tower')).toBeInTheDocument()
+    expect(screen.queryByTestId('live-settling')).not.toBeInTheDocument()
+    expect(screen.queryByTestId('live-archive-strip')).not.toBeInTheDocument()
+    // SSE may still be open (MockEventSource opens) — health must not say healthy.
+    await waitFor(() =>
+      expect(screen.getByTestId('live-feed-health')).toHaveTextContent(/reconnecting/i),
+    )
+    expect(screen.getByTestId('live-feed-health')).not.toHaveTextContent(/feed healthy/i)
+  })
+
+  it('keeps the settled snapshot behind an explicit read-only archive action', async () => {
+    renderPage(
+      {
+        is_live: false,
+        data: null,
+        last_snapshot: { ...raceSnapshot, SessionStatus: 'Finished' },
+        last_positions: { '1': { x: 10, y: 20, z: 0, status: 'OnTrack' } },
+        last_snapshot_at: '2026-07-05T16:02:00Z',
+      },
+      weekendContext('complete'),
+    )
+
+    // Settling first — the tower is hidden until the user opens the archive.
+    await screen.findByTestId('live-settling')
     expect(screen.queryByText('Timing Tower')).not.toBeInTheDocument()
 
-    fireEvent.click(screen.getByRole('button', { name: /view last session/i }))
+    fireEvent.click(screen.getByTestId('live-handoff-archive'))
 
-    await waitFor(() => {
+    await waitFor(() =>
-      expect(screen.getByTestId('live-archive-strip')).toHaveTextContent('Archived snapshot')
+      expect(screen.getByTestId('live-archive-strip')).toHaveTextContent(/read-only/i),
-    })
+    )
     expect(screen.getByText('Timing Tower')).toBeInTheDocument()
-    expect(screen.getAllByText('VER').length).toBeGreaterThan(0)
+    // Archive presents its read-only, timestamped chrome — never LIVE.
     expect(screen.getByText('archive')).toBeInTheDocument()
+    expect(screen.queryByText('LIVE SESSION')).not.toBeInTheDocument()
   })
 
-  it('does not show the archive action when no snapshot is retained', async () => {
+  it('shows inactive handoff when nothing is live or retained', async () => {
-    renderPage({ is_live: false, data: null })
+    renderPage(
-
+      { is_live: false, data: null },
-    expect(await screen.findByTestId('live-empty')).toHaveTextContent('No live session active')
+      {
-    expect(screen.queryByRole('button', { name: /view last session/i })).not.toBeInTheDocument()
+        temporal_state: 'between_weekends',
-  })
+        next_session: {
-
+          session: {
-  it('renders the live session for a red-flag paused snapshot instead of the inactive empty state', async () => {
+            session_key: 21,
-    renderPage({
+            session_name: 'Practice 1',
-      is_live: true,
+            session_type: 'Practice 1',
-      data: {
+            meeting_key: 2,
-        ...archivedSnapshot,
+            date_start: '2026-07-17T09:00:00Z',
-        SessionStatus: 'Inactive',
+            date_end: '2026-07-17T10:00:00Z',
-        TrackStatus: '2',
+            gmt_offset: '',
-        Clock: '00:03:27',
+          },
-        Session: {
+          availability: {
-          MeetingName: 'Belgian Grand Prix',
+            schedule: 'available',
-          CircuitName: 'Spa-Francorchamps',
+            live_transport: 'unknown',
-          SessionType: 'Practice',
+            live_session: 'inactive',
-          SessionName: 'Practice 2',
+            archive: 'unavailable',
-          Path: '',
+            local_analysis: 'not_applicable',
+            freshness: 'fresh',
+            limitations: [],
           },
         },
+        championship_round: 2,
+        total_championship_rounds: 24,
+      },
+    )
+
+    expect(await screen.findByTestId('live-inactive')).toBeInTheDocument()
+    expect(screen.getByTestId('live-page')).toHaveAttribute('data-phase', 'inactive')
+    await waitFor(() =>
+      expect(screen.getByTestId('live-handoff-next')).toHaveTextContent('Practice 1'),
+    )
   })
 
-    expect(await screen.findByText('Timing Tower')).toBeInTheDocument()
+  it('clears fatal initial error once SSE supplies a live snapshot', async () => {
-    expect(screen.queryByTestId('live-empty')).not.toBeInTheDocument()
+    type Listener = (event: { data: string }) => void
-    expect(screen.queryByTestId('live-archive-strip')).not.toBeInTheDocument()
+    class RecoveringEventSource {
+      onopen: (() => void) | null = null
+      onerror: (() => void) | null = null
+      private listeners = new Map<string, Listener[]>()
+      static latest: RecoveringEventSource | null = null
+      constructor() {
+        RecoveringEventSource.latest = this
+        setTimeout(() => this.onopen?.(), 0)
+      }
+      addEventListener(type: string, listener: Listener) {
+        const list = this.listeners.get(type) ?? []
+        list.push(listener)
+        this.listeners.set(type, list)
+      }
+      emit(type: string, data: unknown) {
+        for (const listener of this.listeners.get(type) ?? []) {
+          listener({ data: JSON.stringify(data) })
+        }
+      }
+      close() {}
+    }
+
+    Object.defineProperty(window, 'EventSource', {
+      value: RecoveringEventSource,
+      writable: true,
+      configurable: true,
     })
 
-  it('temporarily omits the track map while live GPS is unavailable', async () => {
+    mockFetchLiveState.mockRejectedValue(new Error('API 503: live state unavailable'))
-    renderPage({
+    mockFetchLiveTrackOutline.mockResolvedValue({
+      circuit_key: 1,
+      points: [],
+      bounds: { minX: 0, maxX: 1, minY: 0, maxY: 1 },
+    })
+    mockFetchWeekendContext.mockResolvedValue({
+      temporal_state: 'no_season',
+      championship_round: 0,
+      total_championship_rounds: 0,
+    })
+
+    render(
+      <QueryClientProvider
+        client={new QueryClient({ defaultOptions: { queries: { retry: false } } })}
+      >
+        <LiveTimingPage />
+      </QueryClientProvider>,
+    )
+
+    expect(await screen.findByTestId('live-initial-error')).toBeInTheDocument()
+    expect(screen.getByText(/Live timing unavailable/i)).toBeInTheDocument()
+
+    await act(async () => {
+      RecoveringEventSource.latest?.emit('snapshot', {
         is_live: true,
-      data: { ...archivedSnapshot, SessionStatus: 'Started' },
+        data: raceSnapshot,
+      })
     })
 
-    expect(await screen.findByText('Timing Tower')).toBeInTheDocument()
+    await waitFor(() => expect(screen.getByText('Timing Tower')).toBeInTheDocument())
-    expect(screen.queryByText('Track Map')).not.toBeInTheDocument()
+    expect(screen.queryByTestId('live-initial-error')).not.toBeInTheDocument()
-    expect(mockFetchLiveTrackOutline).not.toHaveBeenCalled()
+    expect(screen.getByTestId('live-page')).toHaveAttribute('data-phase', 'live')
+    expect(screen.queryByText(/Live timing unavailable/i)).not.toBeInTheDocument()
+  })
+
+  it('clears fatal initial error when SSE reports authoritative inactive null state', async () => {
+    type Listener = (event: { data: string }) => void
+    class InactiveEventSource {
+      onopen: (() => void) | null = null
+      onerror: (() => void) | null = null
+      private listeners = new Map<string, Listener[]>()
+      static latest: InactiveEventSource | null = null
+      constructor() {
+        InactiveEventSource.latest = this
+        setTimeout(() => this.onopen?.(), 0)
+      }
+      addEventListener(type: string, listener: Listener) {
+        const list = this.listeners.get(type) ?? []
+        list.push(listener)
+        this.listeners.set(type, list)
+      }
+      emit(type: string, data: unknown) {
+        for (const listener of this.listeners.get(type) ?? []) {
+          listener({ data: JSON.stringify(data) })
+        }
+      }
+      close() {}
+    }
+
+    Object.defineProperty(window, 'EventSource', {
+      value: InactiveEventSource,
+      writable: true,
+      configurable: true,
+    })
+
+    mockFetchLiveState.mockRejectedValue(new Error('API 503: live state unavailable'))
+    mockFetchLiveTrackOutline.mockResolvedValue({
+      circuit_key: 1,
+      points: [],
+      bounds: { minX: 0, maxX: 1, minY: 0, maxY: 1 },
+    })
+    mockFetchWeekendContext.mockResolvedValue({
+      temporal_state: 'between_weekends',
+      championship_round: 5,
+      total_championship_rounds: 24,
+      season: 2026,
+    })
+
+    render(
+      <QueryClientProvider
+        client={new QueryClient({ defaultOptions: { queries: { retry: false } } })}
+      >
+        <LiveTimingPage />
+      </QueryClientProvider>,
+    )
+
+    expect(await screen.findByTestId('live-initial-error')).toBeInTheDocument()
+
+    await act(async () => {
+      InactiveEventSource.latest?.emit('snapshot', {
+        is_live: false,
+        data: null,
+        last_snapshot: null,
+      })
+    })
+
+    await waitFor(() => expect(screen.getByTestId('live-inactive')).toBeInTheDocument())
+    expect(screen.queryByTestId('live-initial-error')).not.toBeInTheDocument()
+    expect(screen.queryByText(/Live timing unavailable/i)).not.toBeInTheDocument()
+    expect(screen.getByTestId('live-page')).toHaveAttribute('data-phase', 'inactive')
+    expect(screen.queryByText('Timing Tower')).not.toBeInTheDocument()
+  })
+
+  it('keeps bounded initial error + Retry when no stream data arrives', async () => {
+    mockFetchLiveState.mockRejectedValue(new Error('API 503: live state unavailable'))
+    mockFetchLiveTrackOutline.mockResolvedValue({
+      circuit_key: 1,
+      points: [],
+      bounds: { minX: 0, maxX: 1, minY: 0, maxY: 1 },
+    })
+    mockFetchWeekendContext.mockResolvedValue({
+      temporal_state: 'no_season',
+      championship_round: 0,
+      total_championship_rounds: 0,
+    })
+
+    render(
+      <QueryClientProvider
+        client={new QueryClient({ defaultOptions: { queries: { retry: false } } })}
+      >
+        <LiveTimingPage />
+      </QueryClientProvider>,
+    )
+
+    expect(await screen.findByTestId('live-initial-error')).toBeInTheDocument()
+    expect(screen.getByRole('button', { name: 'Retry' })).toBeEnabled()
+    expect(screen.queryByText('Timing Tower')).not.toBeInTheDocument()
   })
 })

frontend/src/test/LocalDataNavigator.test.tsx

@@ -125,7 +125,7 @@ describe('LocalDataNavigator', () => {
 
     expect(await screen.findByTestId('local-nav')).toBeInTheDocument()
     await waitFor(() => {
-      expect(mockFetchLocalMeetings).toHaveBeenCalledWith(2025)
+      expect(mockFetchLocalMeetings).toHaveBeenCalledWith(2025, expect.any(AbortSignal))
     })
     expect(screen.getByText('Monaco')).toBeInTheDocument()
   })

frontend/src/test/Nav.test.tsx

@@ -0,0 +1,67 @@
+import { describe, it, expect } from 'vitest'
+import { render, screen, waitFor, within } from '@testing-library/react'
+import {
+  Outlet,
+  RouterProvider,
+  createRouter,
+  createRootRoute,
+  createRoute,
+  createMemoryHistory,
+} from '@tanstack/react-router'
+import { Nav } from '../components/Nav'
+
+function renderNav() {
+  const rootRoute = createRootRoute({
+    component: () => (
+      <>
+        <Nav />
+        <Outlet />
+      </>
+    ),
+  })
+  const stub = (p: string, id: string) =>
+    createRoute({ getParentRoute: () => rootRoute, path: p, component: () => <div data-testid={id} /> })
+  const router = createRouter({
+    routeTree: rootRoute.addChildren([
+      stub('/', 'home'),
+      stub('/championship', 'championship'),
+      stub('/briefing', 'briefing'),
+      stub('/explore', 'explore'),
+      stub('/admin', 'admin'),
+    ]),
+    history: createMemoryHistory({ initialEntries: ['/'] }),
+  })
+  return render(<RouterProvider router={router} />)
+}
+
+const DESTINATIONS = ['Weekend', 'Championship', 'Briefing', 'Explore']
+
+describe('Nav — one primary navigation system per breakpoint', () => {
+  it('exposes exactly two Primary landmarks (one per breakpoint), never more', async () => {
+    renderNav()
+    await waitFor(() => expect(screen.getAllByRole('navigation', { name: 'Primary' })).toHaveLength(2))
+  })
+
+  it('every Primary landmark contains all four destinations', async () => {
+    renderNav()
+    await waitFor(() => expect(screen.getAllByRole('navigation', { name: 'Primary' }).length).toBe(2))
+    const primaries = screen.getAllByRole('navigation', { name: 'Primary' })
+    for (const nav of primaries) {
+      for (const label of DESTINATIONS) {
+        expect(within(nav).getByRole('link', { name: new RegExp(`^${label}$`) })).toBeInTheDocument()
+      }
+    }
+  })
+
+  it('keeps Admin out of every Primary landmark (operator utility only)', async () => {
+    renderNav()
+    await waitFor(() => expect(screen.getAllByRole('navigation', { name: 'Primary' }).length).toBe(2))
+    const primaries = screen.getAllByRole('navigation', { name: 'Primary' })
+    for (const nav of primaries) {
+      expect(within(nav).queryByRole('link', { name: /Admin/i })).not.toBeInTheDocument()
+    }
+    // Admin lives in the operator utilities toolbar.
+    const toolbar = screen.getByRole('toolbar', { name: 'Operator utilities' })
+    expect(within(toolbar).getByRole('link', { name: /Admin/i })).toBeInTheDocument()
+  })
+})

frontend/src/test/RaceHubPage.test.tsx

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
-import { act, render, screen, waitFor, fireEvent } from '@testing-library/react'
+import { render, screen, waitFor, fireEvent } from '@testing-library/react'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import {
   Outlet,
@@ -9,8 +9,14 @@ import {
   createRoute,
 } from '@tanstack/react-router'
 import { RaceHubPage } from '../pages/RaceHubPage'
-import { MAX_BROWSER_TIMEOUT } from '../lib/schedule'
+import type {
-import type { ContextAvailability, DatasetInfo, Meeting, RaceHub, Session, Weekend, WeekendContext } from '../types'
+  DatasetInfo,
+  Meeting,
+  RaceHub,
+  Session,
+  Weekend,
+  WeekendContext,
+} from '../types'
 
 vi.mock('../api', () => ({
   fetchRaceHub: vi.fn(),
@@ -20,7 +26,13 @@ vi.mock('../api', () => ({
   fetchWeekendContext: vi.fn(),
 }))
 
-import { fetchLocalMeetings, fetchRaceHub, fetchSeasons, fetchWeekend, fetchWeekendContext } from '../api'
+import {
+  fetchRaceHub,
+  fetchSeasons,
+  fetchLocalMeetings,
+  fetchWeekend,
+  fetchWeekendContext,
+} from '../api'
 
 const mockFetchRaceHub = vi.mocked(fetchRaceHub)
 const mockFetchSeasons = vi.mocked(fetchSeasons)
@@ -28,6 +40,8 @@ const mockFetchLocalMeetings = vi.mocked(fetchLocalMeetings)
 const mockFetchWeekend = vi.mocked(fetchWeekend)
 const mockFetchWeekendContext = vi.mocked(fetchWeekendContext)
 
+const NOW = new Date('2025-06-01T00:00:00Z')
+
 const meeting: Meeting = {
   meeting_key: 1229,
   meeting_name: 'Monaco Grand Prix',
@@ -62,6 +76,16 @@ const qualSession: Session = {
   gmt_offset: '02:00:00',
 }
 
+const futureSession: Session = {
+  session_key: 9600,
+  session_name: 'Race',
+  session_type: 'Race',
+  meeting_key: 1300,
+  date_start: '2099-05-25T13:00:00+00:00',
+  date_end: '2099-05-25T15:00:00+00:00',
+  gmt_offset: '02:00:00',
+}
+
 const fullDatasets: Record<string, DatasetInfo> = {
   meeting: { status: 'available', source: 'local', count: 1 },
   session: { status: 'available', source: 'local', count: 1 },
@@ -172,23 +196,38 @@ const weekend: Weekend = {
   ],
 }
 
-const availability: ContextAvailability = {
+const weekendContext: WeekendContext = {
-  source: 'local',
+  season: 2025,
+  temporal_state: 'post_weekend',
+  focus_meeting: meeting,
+  previous_meeting: meeting,
+  default_analysis_session: {
+    session: raceSession,
+    meeting,
+    availability: {
       schedule: 'available',
       live_transport: 'unknown',
       live_session: 'inactive',
       archive: 'unavailable',
       local_analysis: 'complete',
-  freshness: 'local',
+      freshness: 'fresh',
       limitations: [],
-}
+    },
-
+  },
-const analysisContext: WeekendContext = {
+  previous_completed_session: {
-  temporal_state: 'between_weekends',
+    session: raceSession,
-  default_analysis_session: { session: raceSession, meeting, availability },
+    meeting,
-  race_hub_default_session: { session: raceSession, meeting, availability },
+    availability: {
-  race_hub_pre_session: false,
+      schedule: 'available',
-  championship_round: 1,
+      live_transport: 'unknown',
+      live_session: 'inactive',
+      archive: 'unavailable',
+      local_analysis: 'complete',
+      freshness: 'fresh',
+      limitations: [],
+    },
+  },
+  championship_round: 8,
   total_championship_rounds: 24,
 }
 
@@ -204,6 +243,19 @@ function renderRaceHub(sessionKey: number) {
       </QueryClientProvider>
     ),
   })
+  const weekendRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: '/',
+    validateSearch: (search: Record<string, unknown>) => {
+      const meetingKey = Number(search.meeting_key)
+      const sk = Number(search.session_key)
+      return {
+        ...(Number.isFinite(meetingKey) && meetingKey > 0 ? { meeting_key: meetingKey } : {}),
+        ...(Number.isFinite(sk) && sk > 0 ? { session_key: sk } : {}),
+      }
+    },
+    component: () => <div data-testid="weekend-stub" />,
+  })
   const raceHubRoute = createRoute({
     getParentRoute: () => rootRoute,
     path: '/race-hub',
@@ -216,24 +268,25 @@ function renderRaceHub(sessionKey: number) {
       return <RaceHubPage sessionKey={session_key ?? 0} />
     },
   })
-  window.history.pushState({}, '', sessionKey ? `/race-hub?session_key=${sessionKey}` : '/race-hub')
   const router = createRouter({
-    routeTree: rootRoute.addChildren([raceHubRoute]),
+    routeTree: rootRoute.addChildren([weekendRoute, raceHubRoute]),
     history: undefined,
   })
 
-  return { queryClient, ...render(<RouterProvider router={router} />) }
+  router.navigate({ to: '/race-hub', search: sessionKey ? { session_key: sessionKey } : {} })
+  return render(<RouterProvider router={router} />)
 }
 
 describe('RaceHubPage', () => {
   beforeEach(() => {
-    vi.useRealTimers()
     vi.clearAllMocks()
+    vi.useFakeTimers({ shouldAdvanceTime: true })
+    vi.setSystemTime(NOW)
     mockFetchSeasons.mockResolvedValue([2025])
     mockFetchLocalMeetings.mockResolvedValue([meeting])
     mockFetchWeekend.mockResolvedValue(weekend)
     mockFetchRaceHub.mockResolvedValue(raceHub)
-    mockFetchWeekendContext.mockResolvedValue(analysisContext)
+    mockFetchWeekendContext.mockResolvedValue(weekendContext)
   })
 
   afterEach(() => {
@@ -252,9 +305,9 @@ describe('RaceHubPage', () => {
     )
     expect(screen.getByTestId('rh-session-9471')).toBeInTheDocument()
 
-    // Overview is default
     expect(screen.getByTestId('rh-overview')).toBeInTheDocument()
     expect(screen.getByText('Winner')).toBeInTheDocument()
+    expect(screen.queryByText('Local Coverage')).not.toBeInTheDocument()
   })
 
   it('exposes Race Story sub-controls for classification, grid, and positions', async () => {
@@ -264,17 +317,43 @@ describe('RaceHubPage', () => {
     fireEvent.click(screen.getByRole('tab', { name: 'Race Story' }))
 
     expect(screen.getByText('VER')).toBeInTheDocument()
-    
   })
 
-  it('keeps Data Status accessible and free of inline CLI guidance', async () => {
+  it('keeps Diagnostics accessible behind a secondary action, free of inline CLI guidance', async () => {
     renderRaceHub(9472)
     await waitFor(() => expect(screen.getByTestId('race-hub')).toBeInTheDocument())
 
-    fireEvent.click(screen.getByRole('tab', { name: 'Data Status' }))
+    fireEvent.click(screen.getByRole('tab', { name: 'Diagnostics' }))
 
     expect(screen.getByTestId('rh-data-status')).toBeInTheDocument()
     expect(screen.queryByText(/ingest-session/i)).not.toBeInTheDocument()
+
+    expect(screen.queryByTestId('rh-dataset-strip')).not.toBeInTheDocument()
+    fireEvent.click(screen.getByTestId('rh-diagnostics-toggle'))
+    expect(screen.getByTestId('rh-dataset-strip')).toBeInTheDocument()
+  })
+
+  it('does not render the raw dataset strip before fan-facing content', async () => {
+    renderRaceHub(9472)
+    await waitFor(() => expect(screen.getByTestId('race-hub')).toBeInTheDocument())
+
+    expect(screen.getByTestId('rh-overview')).toBeInTheDocument()
+    expect(screen.queryByTestId('rh-dataset-strip')).not.toBeInTheDocument()
+  })
+
+  it('groups analysis navigation into Story, Analysis, and Data & Context', async () => {
+    renderRaceHub(9472)
+    await waitFor(() => expect(screen.getByTestId('race-hub')).toBeInTheDocument())
+
+    expect(screen.getByTestId('rh-tabgroup-story')).toBeInTheDocument()
+    expect(screen.getByTestId('rh-tabgroup-analysis')).toBeInTheDocument()
+    expect(screen.getByTestId('rh-tabgroup-context')).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Overview' })).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Strategy' })).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Compare' })).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Lap Data' })).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Race Control' })).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Diagnostics' })).toBeInTheDocument()
   })
 
   it('toggles the inline weekend switcher', async () => {
@@ -285,121 +364,213 @@ describe('RaceHubPage', () => {
     expect(await screen.findByTestId('rh-switcher')).toBeInTheDocument()
   })
 
-  it('uses the server-selected completed analysis session for bare Race Hub without changing the URL', async () => {
+  it('resolves bare /race-hub through canonical Weekend Context default analysis', async () => {
-    renderRaceHub(0)
-
-    await waitFor(() => expect(mockFetchRaceHub).toHaveBeenCalledWith(9472))
-    expect(mockFetchWeekendContext).toHaveBeenCalledTimes(1)
-  })
-
-  it('renders the intentional pre-session state without analysis cards', async () => {
     mockFetchWeekendContext.mockResolvedValue({
-      ...analysisContext,
+      ...weekendContext,
-      race_hub_default_session: {
+      default_analysis_session: {
-        session: { ...raceSession, session_key: 9473, session_name: 'Practice 1', session_type: 'Practice', date_start: '2099-05-23T13:00:00Z' },
+        session: qualSession,
         meeting,
-        availability,
+        availability: {
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'complete',
+          freshness: 'fresh',
+          limitations: [],
+        },
       },
-      race_hub_pre_session: true,
-      race_hub_refresh_at: '2099-05-23T13:00:00Z',
     })
 
     renderRaceHub(0)
 
-    expect(await screen.findByTestId('race-hub-pre-session')).toBeInTheDocument()
+    await waitFor(() => expect(mockFetchRaceHub).toHaveBeenCalledWith(9471, expect.any(AbortSignal)))
-    expect(screen.getByTestId('rh-pre-session-schedule')).toBeInTheDocument()
+    expect(mockFetchRaceHub).not.toHaveBeenCalledWith(9600, expect.anything())
+    expect(mockFetchRaceHub).not.toHaveBeenCalledWith(9600)
+  })
+
+  it('shows no-analysis fallback when Weekend Context has no default analysis', async () => {
+    mockFetchWeekendContext.mockResolvedValue({
+      ...weekendContext,
+      default_analysis_session: undefined,
+      previous_completed_session: undefined,
+    })
+
+    renderRaceHub(0)
+
+    await waitFor(() => expect(screen.getByTestId('race-hub-no-analysis')).toBeInTheDocument())
+    expect(mockFetchRaceHub).not.toHaveBeenCalled()
+  })
+
+  it('renders a pre-session view instead of empty analysis for a future session', async () => {
+    mockFetchRaceHub.mockResolvedValue({
+      ...raceHub,
+      session_key: 9600,
+      source: 'none',
+      session: futureSession,
+      meeting: { ...meeting, meeting_key: 1300 },
+      results: [],
+      starting_grid: [],
+      datasets: {},
+    })
+    mockFetchWeekend.mockResolvedValue({
+      source: 'none',
+      meeting_key: 1300,
+      meeting: { ...meeting, meeting_key: 1300 },
+      sessions: [{ session: futureSession, source: 'none', datasets: {} }],
+    })
+
+    renderRaceHub(9600)
+
+    await waitFor(() => expect(screen.getByTestId('race-hub')).toBeInTheDocument())
+    expect(await screen.findByTestId('rh-presession')).toBeInTheDocument()
+    expect(screen.queryByTestId('rh-overview')).not.toBeInTheDocument()
     expect(screen.queryByText('Winner')).not.toBeInTheDocument()
-    expect(mockFetchRaceHub).not.toHaveBeenCalled()
   })
 
-  it('opens the weekend switcher from pre-session and navigates to the selected explicit session', async () => {
+  it('renders a preparing view for a settling session with no local analysis', async () => {
+    mockFetchWeekend.mockResolvedValue({
+      ...weekend,
+      sessions: [
+        { session: raceSession, source: 'none', datasets: {} },
+      ],
+    })
     mockFetchWeekendContext.mockResolvedValue({
-      ...analysisContext,
+      ...weekendContext,
-      race_hub_default_session: {
+      temporal_state: 'session_settling',
-        session: { ...raceSession, session_key: 9473, session_name: 'Practice 1', session_type: 'Practice', date_start: '2099-05-23T13:00:00Z' },
+      default_analysis_session: undefined,
+      previous_completed_session: {
+        session: raceSession,
         meeting,
-        availability,
+        availability: {
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'pending',
+          freshness: 'fresh',
+          limitations: [],
         },
-      race_hub_pre_session: true,
-      race_hub_refresh_at: '2099-05-23T13:00:00Z',
-    })
-
-    renderRaceHub(0)
-
-    const switchWeekend = await screen.findByTestId('rh-switch-weekend')
-    expect(switchWeekend).toHaveAttribute('aria-expanded', 'false')
-    fireEvent.click(switchWeekend)
-    expect(await screen.findByTestId('rh-switcher')).toBeInTheDocument()
-    expect(switchWeekend).toHaveAttribute('aria-expanded', 'true')
-
-    fireEvent.click(await screen.findByTestId('rh-switcher-session-9471'))
-    await waitFor(() => expect(window.location.search).toBe('?session_key=9471'))
-  })
-
-  it('shows recovery instead of selecting an empty future session', async () => {
-    mockFetchWeekendContext.mockResolvedValue({
-      ...analysisContext,
-      race_hub_default_session: undefined,
-      race_hub_pre_session: false,
-    })
-
-    renderRaceHub(0)
-
-    expect(await screen.findByTestId('race-hub-empty')).toHaveTextContent('No completed local analysis yet')
-    expect(mockFetchRaceHub).not.toHaveBeenCalled()
-  })
-
-  it('hands a bare route from completed analysis to pre-session at the supplied refresh boundary', async () => {
-    vi.useFakeTimers({ shouldAdvanceTime: true })
-    const handoff = new Date(Date.now() + 10_000).toISOString()
-    const pendingContext: WeekendContext = {
-      ...analysisContext,
-      race_hub_default_session: {
-        session: { ...raceSession, session_key: 9473, session_name: 'Practice 1', session_type: 'Practice', date_start: handoff },
-        meeting,
-        availability,
       },
-      race_hub_pre_session: true,
+    })
-      race_hub_refresh_at: new Date(Date.now() + 16_000).toISOString(),
+    mockFetchRaceHub.mockResolvedValue({
-    }
+      ...raceHub,
-    mockFetchWeekendContext
+      source: 'none',
-      .mockResolvedValueOnce({ ...analysisContext, race_hub_refresh_at: handoff })
+      results: [],
-      .mockResolvedValueOnce(pendingContext)
+      starting_grid: [],
-
+      datasets: {},
-    renderRaceHub(0)
-    await screen.findByTestId('race-hub')
-    await act(async () => { await vi.advanceTimersByTimeAsync(10_000) })
-
-    expect(await screen.findByTestId('race-hub-pre-session')).toBeInTheDocument()
-    expect(mockFetchWeekendContext).toHaveBeenCalledTimes(2)
-    expect(mockFetchRaceHub).toHaveBeenCalledWith(9472)
-    expect(mockFetchRaceHub).not.toHaveBeenCalledWith(9473)
     })
 
-  it('re-arms a bare route refresh after a capped browser timer', async () => {
-    vi.useFakeTimers({ shouldAdvanceTime: true })
-    mockFetchWeekendContext.mockResolvedValue({
-      ...analysisContext,
-      race_hub_refresh_at: new Date(Date.now() + MAX_BROWSER_TIMEOUT + 1_000).toISOString(),
-    })
-
-    renderRaceHub(0)
-    await screen.findByTestId('race-hub')
-    await act(async () => { await vi.advanceTimersByTimeAsync(MAX_BROWSER_TIMEOUT) })
-
-    await waitFor(() => expect(mockFetchWeekendContext).toHaveBeenCalledTimes(2))
-    await act(async () => { await vi.advanceTimersByTimeAsync(1_000) })
-    await waitFor(() => expect(mockFetchWeekendContext).toHaveBeenCalledTimes(3))
-  })
-
-  it('keeps an explicit session URL stable across the canonical refresh boundary', async () => {
-    vi.useFakeTimers()
     renderRaceHub(9472)
 
-    await act(async () => { await vi.advanceTimersByTimeAsync(60_000) })
+    await waitFor(() => expect(screen.getByTestId('rh-preparing')).toBeInTheDocument())
+    expect(screen.queryByTestId('rh-overview')).not.toBeInTheDocument()
+  })
 
-    expect(mockFetchWeekendContext).not.toHaveBeenCalled()
+  it('renders unavailable distinctly from request errors', async () => {
-    expect(mockFetchRaceHub).toHaveBeenCalledWith(9472)
+    mockFetchWeekend.mockResolvedValue({
-    expect(mockFetchRaceHub).not.toHaveBeenCalledWith(9473)
+      ...weekend,
+      sessions: [{ session: raceSession, source: 'none', datasets: {} }],
+    })
+    mockFetchWeekendContext.mockResolvedValue({
+      ...weekendContext,
+      previous_completed_session: {
+        session: raceSession,
+        meeting,
+        availability: {
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'unavailable',
+          freshness: 'stale',
+          limitations: ['analysis_blocked'],
+        },
+      },
+      default_analysis_session: {
+        session: raceSession,
+        meeting,
+        availability: {
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'unavailable',
+          freshness: 'stale',
+          limitations: ['analysis_blocked'],
+        },
+      },
+    })
+    mockFetchRaceHub.mockResolvedValue({
+      ...raceHub,
+      source: 'none',
+      results: [],
+      datasets: {},
+    })
+
+    renderRaceHub(9472)
+
+    await waitFor(() => expect(screen.getByTestId('rh-unavailable')).toBeInTheDocument())
+    expect(screen.queryByTestId('race-hub-error')).not.toBeInTheDocument()
+  })
+
+  it('labels a completed but partial session as Partial and keeps analysis', async () => {
+    mockFetchWeekend.mockResolvedValue({
+      ...weekend,
+      sessions: [
+        { session: qualSession, source: 'local', datasets: fullDatasets },
+        { session: raceSession, source: 'partial', datasets: { drivers: fullDatasets.drivers } },
+      ],
+    })
+    mockFetchWeekendContext.mockResolvedValue({
+      ...weekendContext,
+      default_analysis_session: {
+        session: raceSession,
+        meeting,
+        availability: {
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'partial',
+          freshness: 'fresh',
+          limitations: [],
+        },
+      },
+    })
+
+    renderRaceHub(9472)
+
+    await waitFor(() => expect(screen.getByTestId('rh-active-state')).toBeInTheDocument())
+    expect(screen.getByTestId('rh-active-state')).toHaveTextContent('Partial')
+    expect(screen.getByTestId('rh-partial-banner')).toBeInTheDocument()
+    expect(screen.getByTestId('rh-overview')).toBeInTheDocument()
+  })
+
+  it('offers retry and back-to-Weekend on an error', async () => {
+    mockFetchRaceHub.mockRejectedValue(new Error('boom'))
+
+    renderRaceHub(9472)
+
+    await waitFor(() => expect(screen.getByTestId('race-hub-error')).toBeInTheDocument())
+    expect(screen.getByTestId('rh-retry')).toBeInTheDocument()
+    const back = screen.getByTestId('rh-back-weekend')
+    expect(back).toHaveAttribute('href', expect.stringMatching(/meeting_key=1229/))
+    expect(back).toHaveAttribute('href', expect.stringMatching(/session_key=9472/))
+    expect(back.getAttribute('href')).toMatch(/^\//)
+
+    mockFetchRaceHub.mockResolvedValue(raceHub)
+    fireEvent.click(screen.getByTestId('rh-retry'))
+    await waitFor(() => expect(screen.getByTestId('race-hub')).toBeInTheDocument())
+  })
+
+  it('exposes a Back to Weekend link that carries meeting and session context', async () => {
+    renderRaceHub(9472)
+
+    await waitFor(() => expect(screen.getByTestId('race-hub')).toBeInTheDocument())
+    const back = screen.getByRole('link', { name: 'Back to Weekend' })
+    expect(back).toHaveAttribute('data-testid', 'rh-back-weekend')
+    expect(back).toHaveAttribute('href', expect.stringMatching(/meeting_key=1229/))
+    expect(back).toHaveAttribute('href', expect.stringMatching(/session_key=9472/))
   })
 })

frontend/src/test/RacePreviewPage.test.tsx

@@ -1,8 +1,10 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest'
-import { render, screen, waitFor } from '@testing-library/react'
+import { render, screen, waitFor, fireEvent } from '@testing-library/react'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { RouterProvider, createRouter, createRootRoute, createRoute } from '@tanstack/react-router'
+import { rememberResponseAvailability } from '../lib/fetch'
 import { RacePreviewPage } from '../pages/RacePreviewPage'
+import { ApiError } from '../lib/fetch'
 import type { ChampHubDriver, ChampionshipHub, EnrichedGrid, EnrichedResult, Meeting, Session, TrackOutline } from '../types'
 
 vi.mock('../api', () => ({
@@ -174,16 +176,22 @@ const outline: TrackOutline = {
   bounds: { minX: 0, maxX: 1, minY: 0, maxY: 1 },
 }
 
-function renderPage() {
+function renderPage(props?: {
+  meeting?: Meeting
+  season?: number
+  embedded?: boolean
+  shellAvailability?: 'local' | 'partial' | 'stale' | 'archive' | 'limited' | 'missing' | null
+}) {
   const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } })
+  const Page = () => <RacePreviewPage {...props} />
   const rootRoute = createRootRoute({
     component: () => (
       <QueryClientProvider client={queryClient}>
-        <RacePreviewPage />
+        <Page />
       </QueryClientProvider>
     ),
   })
-  const indexRoute = createRoute({ getParentRoute: () => rootRoute, path: '/', component: RacePreviewPage })
+  const indexRoute = createRoute({ getParentRoute: () => rootRoute, path: '/', component: Page })
   const router = createRouter({ routeTree: rootRoute.addChildren([indexRoute]) })
   return render(<RouterProvider router={router} />)
 }
@@ -274,4 +282,145 @@ describe('RacePreviewPage', () => {
       expect(screen.getByTestId('preview-last-year-card')).toHaveTextContent('First time on the calendar')
     })
   })
+
+  it('uses canonical meeting identity when embedded and skips seasons/meetings selection', async () => {
+    mockFetchSessions.mockImplementation(async (meetingKey: number) => {
+      if (meetingKey === 100) return sessions
+      if (meetingKey === 90) return [priorRaceSession]
+      return []
+    })
+    mockFetchMeetings.mockImplementation(async (year: number) => {
+      if (year === 2098) return [priorMeeting]
+      return []
+    })
+
+    renderPage({ meeting: upcomingMeeting, season: 2099, embedded: true, shellAvailability: 'partial' })
+
+    await waitFor(() => expect(screen.getByTestId('preview-page')).toBeInTheDocument())
+    expect(screen.getByTestId('preview-page')).toHaveAttribute('data-meeting-key', '100')
+    expect(screen.getByTestId('preview-page')).toHaveAttribute('data-embedded', 'true')
+    expect(mockFetchSeasons).not.toHaveBeenCalled()
+    // Current-year meetings selection is skipped; prior-year lookup may still run.
+    expect(mockFetchMeetings).not.toHaveBeenCalledWith(2099, expect.anything(), expect.anything())
+    expect(mockFetchSessions).toHaveBeenCalledWith(100, 'auto', expect.anything())
+    expect(screen.queryByTestId('preview-header')).not.toBeInTheDocument()
+  })
+
+  it('dedupes an equivalent shell notice but shows distinct Preview freshness', async () => {
+    mockFetchSessions.mockImplementation(async (meetingKey: number) => {
+      if (meetingKey === 100) return sessions
+      if (meetingKey === 90) return [priorRaceSession]
+      return []
+    })
+    mockFetchMeetings.mockImplementation(async (year: number) => {
+      if (year === 2098) return [priorMeeting]
+      return []
+    })
+
+    const staleHub = { ...hub }
+    rememberResponseAvailability(staleHub, { source: 'openf1', freshness: 'stale' })
+    mockFetchChampionshipHub.mockResolvedValue(staleHub)
+
+    const distinct = renderPage({
+      meeting: upcomingMeeting,
+      season: 2099,
+      embedded: true,
+      shellAvailability: 'partial',
+    })
+    await waitFor(() => expect(screen.getByTestId('preview-data-notice')).toHaveTextContent(/Stale/i))
+    distinct.unmount()
+
+    const partialHub = { ...hub }
+    rememberResponseAvailability(partialHub, { source: 'openf1', freshness: 'partial' })
+    mockFetchChampionshipHub.mockResolvedValue(partialHub)
+
+    renderPage({
+      meeting: upcomingMeeting,
+      season: 2099,
+      embedded: true,
+      shellAvailability: 'partial',
+    })
+    await waitFor(() => expect(screen.getByTestId('preview-page')).toBeInTheDocument())
+    expect(screen.queryByTestId('preview-data-notice')).not.toBeInTheDocument()
+  })
+
+  it('preserves Stale/Partial over routine Championship Local from conflicting sources', async () => {
+    mockFetchSessions.mockImplementation(async (meetingKey: number) => {
+      if (meetingKey === 100) {
+        const payload = [...sessions]
+        rememberResponseAvailability(payload, { source: 'openf1', freshness: 'stale' })
+        return payload
+      }
+      if (meetingKey === 90) return [priorRaceSession]
+      return []
+    })
+    mockFetchMeetings.mockImplementation(async (year: number) => {
+      if (year === 2098) return [priorMeeting]
+      return []
+    })
+
+    const localHub = { ...hub }
+    rememberResponseAvailability(localHub, { source: 'local', freshness: 'local' })
+    mockFetchChampionshipHub.mockResolvedValue(localHub)
+
+    renderPage({ meeting: upcomingMeeting, season: 2099 })
+
+    await waitFor(() => expect(screen.getByTestId('preview-data-notice')).toHaveTextContent(/Stale/i))
+    expect(screen.getByTestId('preview-title-fight-card')).toBeInTheDocument()
+    expect(screen.getByTestId('preview-schedule')).toHaveTextContent('FP1')
+  })
+
+  it('shows sanitized sessions failure with Retry that refetches once', async () => {
+    let sessionCalls = 0
+    mockFetchSessions.mockImplementation(async (meetingKey: number) => {
+      if (meetingKey !== 100) return [priorRaceSession]
+      sessionCalls += 1
+      if (sessionCalls === 1) {
+        throw new ApiError('http', 'API 500: sessions boom', { status: 500 })
+      }
+      return sessions
+    })
+    mockFetchMeetings.mockImplementation(async (year: number) => {
+      if (year === 2098) return [priorMeeting]
+      return []
+    })
+
+    renderPage({ meeting: upcomingMeeting, season: 2099, embedded: true })
+
+    await waitFor(() => expect(screen.getByTestId('preview-sessions-error')).toBeInTheDocument())
+    expect(screen.getByTestId('preview-sessions-error')).not.toHaveTextContent(/API 500|sessions boom/i)
+    expect(screen.getByTestId('preview-page')).toBeInTheDocument()
+
+    const retry = screen.getByTestId('preview-sessions-retry')
+    fireEvent.click(retry)
+    fireEvent.click(retry)
+
+    await waitFor(() => expect(screen.getByTestId('preview-schedule')).toHaveTextContent('FP1'))
+    expect(sessionCalls).toBe(2)
+    expect(screen.queryByTestId('preview-sessions-error')).not.toBeInTheDocument()
+  })
+
+  it('sanitizes raw HTTP errors and offers a guarded keyboard Retry', async () => {
+    mockFetchSeasons.mockRejectedValue(
+      new ApiError('http', 'API 500: Internal Server Error', { status: 500 }),
+    )
+
+    renderPage()
+
+    await waitFor(() => expect(screen.getByTestId('preview-error')).toBeInTheDocument())
+    expect(screen.getByTestId('preview-error')).not.toHaveTextContent(/API 500|Internal Server Error/i)
+    const retry = screen.getByRole('button', { name: 'Retry' })
+    expect(retry).toBeEnabled()
+
+    mockFetchSeasons.mockResolvedValue([2099])
+    mockFetchMeetings.mockResolvedValue([upcomingMeeting])
+    mockFetchSessions.mockResolvedValue(sessions)
+
+    fireEvent.click(retry)
+    fireEvent.click(retry)
+
+    await waitFor(() => expect(screen.getByTestId('preview-page')).toBeInTheDocument())
+    // Guarded: one in-flight refetch despite double click while fetching.
+    expect(mockFetchSeasons.mock.calls.length).toBeGreaterThanOrEqual(2)
+  })
 })

frontend/src/test/RaceStoryCanvas.test.tsx

@@ -278,6 +278,15 @@ describe('RaceStoryCanvas replay map', () => {
     expect(screen.getByTestId('chapter-card-0')).not.toHaveClass('active')
   })
 
+  it('exposes the final running order outcome region with winner position', () => {
+    renderCanvas()
+
+    const outcome = screen.getByTestId('race-story-outcome')
+    expect(outcome).toHaveAttribute('aria-label', 'Final running order')
+    expect(outcome).toHaveTextContent('VER')
+    expect(outcome.querySelector('.rs-pos-col')).toHaveTextContent('1')
+  })
+
   it('renders the empty-state card when positions are unavailable', () => {
     renderCanvas({
       datasets: { positions: { status: 'missing', source: 'local', count: 0 } },

frontend/src/test/SessionBanner.test.tsx

@@ -1,61 +0,0 @@
-import { describe, expect, it } from 'vitest'
-import { render, screen } from '@testing-library/react'
-import { SessionBanner } from '../components/live/SessionBanner'
-import type { LiveStreamData } from '../types'
-
-function makeSnapshot(sessionType: string, sessionName: string): LiveStreamData {
-  return {
-    Drivers: {},
-    DriverInfo: {},
-    Tyres: {},
-    RCMessages: [],
-    Weather: { AirTemp: 0, TrackTemp: 0, Humidity: 0, WindSpeed: 0, WindDir: 0, Rainfall: false },
-    Session: {
-      MeetingName: 'Belgian Grand Prix',
-      CircuitName: 'Spa-Francorchamps',
-      SessionType: sessionType,
-      SessionName: sessionName,
-      Path: '',
-    },
-    TeamRadio: [],
-    TrackStatus: '1',
-    CurrentLap: 0,
-    TotalLaps: 0,
-    Clock: '00:45:00',
-    ClockRefTime: '',
-    ClockExtrapolating: false,
-    Stints: {},
-  }
-}
-
-describe('SessionBanner', () => {
-  it('never renders a race lap counter for a practice session', () => {
-    render(
-      <SessionBanner
-        isLive
-        snapshot={makeSnapshot('Practice', 'Practice 2')}
-        rows={[]}
-        connection="connected"
-        now={0}
-      />,
-    )
-    expect(screen.queryByTestId('live-lap-counter')).not.toBeInTheDocument()
-    // Session identity and clock stay intact.
-    expect(screen.getByText('Belgian Grand Prix')).toBeInTheDocument()
-    expect(screen.getByTestId('live-clock')).toHaveTextContent('00:45:00')
-  })
-
-  it('shows the lap counter for a race session', () => {
-    const snapshot = { ...makeSnapshot('Race', 'Race'), CurrentLap: 12, TotalLaps: 44 }
-    render(
-      <SessionBanner
-        isLive
-        snapshot={snapshot}
-        rows={[]}
-        connection="connected"
-        now={0}
-      />,
-    )
-    expect(screen.getByTestId('live-lap-counter')).toHaveTextContent('L12/44')
-  })
-})

frontend/src/test/TabBar.test.tsx

@@ -3,7 +3,7 @@ import { render, screen, fireEvent } from '@testing-library/react'
 import { TabBar } from '../components/TabBar'
 
 describe('TabBar', () => {
-  it('renders all Race Hub workspace tabs', () => {
+  it('renders all Race Hub workspace tabs grouped into a hierarchy', () => {
     render(<TabBar active="overview" onChange={() => {}} />)
     expect(screen.getByRole('tab', { name: 'Overview' })).toBeInTheDocument()
     expect(screen.getByRole('tab', { name: 'Race Story' })).toBeInTheDocument()
@@ -12,7 +12,11 @@ describe('TabBar', () => {
     expect(screen.getByRole('tab', { name: 'Lap Data' })).toBeInTheDocument()
     expect(screen.getByRole('tab', { name: 'Conditions' })).toBeInTheDocument()
     expect(screen.getByRole('tab', { name: 'Race Control' })).toBeInTheDocument()
-    expect(screen.getByRole('tab', { name: 'Data Status' })).toBeInTheDocument()
+    expect(screen.getByRole('tab', { name: 'Diagnostics' })).toBeInTheDocument()
+
+    expect(screen.getByTestId('rh-tabgroup-story')).toBeInTheDocument()
+    expect(screen.getByTestId('rh-tabgroup-analysis')).toBeInTheDocument()
+    expect(screen.getByTestId('rh-tabgroup-context')).toBeInTheDocument()
   })
 
   it('marks the active tab with aria-selected', () => {

frontend/src/test/TyreDegPanel.test.tsx

@@ -47,20 +47,9 @@ function snapshotRows(lap: number, lastLapTime: string): LiveTimingRow[] {
 }
 
 describe('TyreDegPanel', () => {
-  it('stays collapsed while every stint is still warming up', () => {
+  it('shows a warming-up placeholder until enough clean laps accumulate', () => {
     render(<TyreDegPanel rows={snapshotRows(3, '1:30.000')} sessionType="Race" pinned={[]} />)
     const panel = screen.getByTestId('tyredeg-panel')
-
-    // A panel of "warming up" placeholders carries no information and used to
-    // push the Timing Tower off the fold for the first third of a race.
-    expect(screen.queryAllByTestId('tyredeg-row')).toHaveLength(0)
-    expect(panel).toHaveTextContent('collecting clean laps')
-  })
-
-  it('shows a warming-up placeholder on each row once expanded', () => {
-    render(<TyreDegPanel rows={snapshotRows(3, '1:30.000')} sessionType="Race" pinned={[]} />)
-    fireEvent.click(screen.getByRole('button', { name: /tyre deg/i }))
-    const panel = screen.getByTestId('tyredeg-panel')
     expect(panel).toHaveTextContent('VER')
     expect(panel).toHaveTextContent('M +5')
     expect(panel).toHaveTextContent('fresh')
@@ -72,7 +61,6 @@ describe('TyreDegPanel', () => {
       makeRow('1', 1, 'VER', { NumberOfLaps: 10, LastLapTime: '1:30.000' }, { Compound: 'MEDIUM', Age: 12 }),
     ]
     render(<TyreDegPanel rows={rows} sessionType="Race" pinned={[]} />)
-    fireEvent.click(screen.getByRole('button', { name: /tyre deg/i }))
     expect(screen.getByText('mid-life')).toBeInTheDocument()
   })
 
@@ -93,46 +81,13 @@ describe('TyreDegPanel', () => {
     expect(panel).toHaveTextContent('→ ~P2')
   })
 
-  it('collapses by default outside race sessions and hides the rejoin estimate when expanded', () => {
+  it('hides the rejoin estimate outside race sessions and collapses on toggle', () => {
     render(<TyreDegPanel rows={snapshotRows(3, '1:30.000')} sessionType="Qualifying" pinned={[]} />)
     const panel = screen.getByTestId('tyredeg-panel')
-
-    // Practice/qualifying starts collapsed so the Timing Tower stays above the fold.
-    expect(screen.queryAllByTestId('tyredeg-row')).toHaveLength(0)
-    fireEvent.click(screen.getByRole('button', { name: /tyre deg/i }))
-    expect(screen.getAllByTestId('tyredeg-row')).toHaveLength(2)
     expect(panel).not.toHaveTextContent('~P')
-  })
-
-  it('opens itself during a race as soon as a stint has signal', () => {
-    const { rerender } = render(
-      <TyreDegPanel rows={snapshotRows(1, '1:30.000')} sessionType="Race" pinned={[]} />,
-    )
-    expect(screen.queryAllByTestId('tyredeg-row')).toHaveLength(0)
-
-    for (let lap = 2; lap <= 6; lap++) {
-      const time = `1:30.${String((lap - 1) * 100).padStart(3, '0')}`
-      rerender(<TyreDegPanel rows={snapshotRows(lap, time)} sessionType="Race" pinned={[]} />)
-    }
 
     expect(screen.getAllByTestId('tyredeg-row')).toHaveLength(2)
-  })
+    fireEvent.click(screen.getByRole('button', { name: /tyre deg/i }))
-
-  it('keeps the reader\'s own collapse choice when signal arrives', () => {
-    const { rerender } = render(
-      <TyreDegPanel rows={snapshotRows(1, '1:30.000')} sessionType="Race" pinned={[]} />,
-    )
-    // Reader opens it early, then closes it again — that decision must stick
-    // even once the panel would otherwise auto-open.
-    const toggle = screen.getByRole('button', { name: /tyre deg/i })
-    fireEvent.click(toggle)
-    fireEvent.click(toggle)
-
-    for (let lap = 2; lap <= 6; lap++) {
-      const time = `1:30.${String((lap - 1) * 100).padStart(3, '0')}`
-      rerender(<TyreDegPanel rows={snapshotRows(lap, time)} sessionType="Race" pinned={[]} />)
-    }
-
     expect(screen.queryAllByTestId('tyredeg-row')).toHaveLength(0)
   })
 
@@ -141,7 +96,6 @@ describe('TyreDegPanel', () => {
       makeRow(String(index + 1), index + 1, `D${index + 1}`),
     )
     render(<TyreDegPanel rows={rows} sessionType="Race" pinned={['14']} />)
-    fireEvent.click(screen.getByRole('button', { name: /tyre deg/i }))
     expect(screen.getAllByTestId('tyredeg-row')).toHaveLength(11)
     expect(screen.getByText('D14')).toBeInTheDocument()
     expect(screen.queryByText('D12')).not.toBeInTheDocument()

frontend/src/test/WeekendPage.test.tsx

@@ -0,0 +1,651 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
+import { render, screen, waitFor, fireEvent } from '@testing-library/react'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import {
+  Outlet,
+  RouterProvider,
+  createRouter,
+  createRootRoute,
+  createRoute,
+  createMemoryHistory,
+} from '@tanstack/react-router'
+import { WeekendPage } from '../pages/WeekendPage'
+import type {
+  ChampionshipHub,
+  ContextAvailability,
+  ContextSession,
+  Meeting,
+  RaceHub,
+  Session,
+  TemporalState,
+  WeekendContext,
+} from '../types'
+import { parseWeekendSearch } from '../lib/routeSearch'
+
+vi.mock('../api', () => ({
+  fetchWeekendContext: vi.fn(),
+  fetchChampionshipHub: vi.fn(),
+  fetchNews: vi.fn(),
+  fetchRaceHub: vi.fn(),
+  fetchWeekend: vi.fn(),
+  // Consumed transitively by RacePreviewPage (folded into PreSessionView):
+  fetchSeasons: vi.fn(),
+  fetchMeetings: vi.fn(),
+  fetchSessions: vi.fn(),
+  fetchResults: vi.fn(),
+  fetchStartingGrid: vi.fn(),
+  fetchTrackOutline: vi.fn(),
+}))
+
+import {
+  fetchWeekendContext,
+  fetchChampionshipHub,
+  fetchNews,
+  fetchRaceHub,
+  fetchWeekend,
+  fetchSeasons,
+  fetchMeetings,
+  fetchSessions,
+  fetchResults,
+  fetchStartingGrid,
+  fetchTrackOutline,
+} from '../api'
+import { rememberResponseAvailability } from '../lib/fetch'
+
+const mockContext = vi.mocked(fetchWeekendContext)
+const mockHub = vi.mocked(fetchChampionshipHub)
+const mockNews = vi.mocked(fetchNews)
+const mockRaceHub = vi.mocked(fetchRaceHub)
+const mockWeekend = vi.mocked(fetchWeekend)
+const mockSeasons = vi.mocked(fetchSeasons)
+const mockMeetings = vi.mocked(fetchMeetings)
+const mockSessions = vi.mocked(fetchSessions)
+const mockResults = vi.mocked(fetchResults)
+const mockGrid = vi.mocked(fetchStartingGrid)
+const mockTrack = vi.mocked(fetchTrackOutline)
+
+function availability(overrides: Partial<ContextAvailability> = {}): ContextAvailability {
+  return {
+    schedule: 'available',
+    live_transport: 'unknown',
+    live_session: 'inactive',
+    archive: 'unavailable',
+    local_analysis: 'complete',
+    freshness: 'fresh',
+    limitations: [],
+    ...overrides,
+  }
+}
+
+function meeting(overrides: Partial<Meeting> = {}): Meeting {
+  return {
+    meeting_key: 1,
+    meeting_name: 'British Grand Prix',
+    meeting_official_name: 'FORMULA 1 BRITISH GRAND PRIX',
+    location: 'Silverstone',
+    country_name: 'United Kingdom',
+    country_code: 'GBR',
+    country_flag: '',
+    circuit_key: 2,
+    circuit_short_name: 'Silverstone',
+    date_start: '2026-07-03T09:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    year: 2026,
+    ...overrides,
+  }
+}
+
+function session(overrides: Partial<Session> = {}): Session {
+  return {
+    session_key: 11,
+    session_name: 'Race',
+    session_type: 'Race',
+    meeting_key: 1,
+    date_start: '2026-07-05T14:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    gmt_offset: '',
+    ...overrides,
+  }
+}
+
+function ctxSession(overrides: Partial<ContextSession> = {}): ContextSession {
+  return {
+    session: session(),
+    meeting: meeting(),
+    availability: availability(),
+    ...overrides,
+  }
+}
+
+function context(overrides: Partial<WeekendContext> = {}): WeekendContext {
+  return {
+    season: 2026,
+    temporal_state: 'between_weekends',
+    championship_round: 5,
+    total_championship_rounds: 24,
+    ...overrides,
+  }
+}
+
+const hub: ChampionshipHub = {
+  season: 2026,
+  round: 5,
+  total_rounds: 24,
+  rounds_left: 19,
+  last_race: 'British GP',
+  round_labels: [],
+  drivers: [
+    { driver_number: 1, name_acronym: 'VER', full_name: 'Max', team_name: 'RB', team_colour: '3671c6', points: 120, position: 1, wins: 4, podiums: 5, poles: 3, form: [], cumulative: [95, 120], teammate_wins: 0, teammate_losses: 0, round_positions: [] },
+  ],
+  teams: [],
+}
+
+const raceHub = {
+  session_key: 11,
+  results: [
+    { driver_number: 1, position: 1, name_acronym: 'VER', full_name: 'Max', team_name: 'RB', team_colour: '3671c6', dnf: false, dns: false, dsq: false, duration: 5400, gap_to_leader: null },
+  ],
+} as unknown as RaceHub
+
+function renderAt(path: string) {
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } })
+
+  const rootRoute = createRootRoute({
+    component: () => (
+      <QueryClientProvider client={queryClient}>
+        <Outlet />
+      </QueryClientProvider>
+    ),
+  })
+  const homeRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: '/',
+    validateSearch: (s: Record<string, unknown>) => parseWeekendSearch(s),
+    component: function HomeRoute() {
+      const { meeting_key, session_key } = homeRoute.useSearch()
+      return <WeekendPage focusMeetingKey={meeting_key} focusSessionKey={session_key} />
+    },
+  })
+  const previewRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: '/preview',
+    component: () => <WeekendPage preview />,
+  })
+  const raceHubRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: '/race-hub',
+    validateSearch: (s: Record<string, unknown>) => {
+      const sk = Number(s.session_key)
+      return Number.isFinite(sk) && sk > 0 ? { session_key: sk } : {}
+    },
+    component: () => <div data-testid="race-hub-stub" />,
+  })
+  const stub = (p: string, id: string) =>
+    createRoute({ getParentRoute: () => rootRoute, path: p, component: () => <div data-testid={id} /> })
+
+  const router = createRouter({
+    routeTree: rootRoute.addChildren([
+      homeRoute,
+      previewRoute,
+      raceHubRoute,
+      stub('/live', 'live-stub'),
+      stub('/explore', 'explore-stub'),
+      stub('/championship', 'championship-stub'),
+      stub('/briefing', 'briefing-stub'),
+    ]),
+    history: createMemoryHistory({ initialEntries: [path] }),
+  })
+  return render(<RouterProvider router={router} />)
+}
+
+describe('WeekendPage canonical contract rendering', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.setSystemTime(new Date('2026-07-08T12:00:00Z'))
+    mockHub.mockResolvedValue(hub)
+    mockNews.mockResolvedValue([])
+    mockRaceHub.mockResolvedValue(raceHub)
+    mockWeekend.mockResolvedValue({
+      source: 'local',
+      meeting_key: 1,
+      meeting: meeting(),
+      sessions: [
+        {
+          session: session({ session_key: 11, session_name: 'Race' }),
+          source: 'local',
+          datasets: {},
+        },
+      ],
+      default_session_key: 11,
+    })
+    mockSeasons.mockResolvedValue([2026])
+    mockMeetings.mockResolvedValue([meeting()])
+    mockSessions.mockResolvedValue([session()])
+    mockResults.mockResolvedValue([])
+    mockGrid.mockResolvedValue([])
+    mockTrack.mockResolvedValue(null)
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+  })
+
+  it('shows the loading surface before the canonical context resolves', async () => {
+    mockContext.mockReturnValue(new Promise(() => {}))
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-loading')).toBeInTheDocument())
+  })
+
+  it('shows an explicit error surface when the canonical endpoint fails', async () => {
+    mockContext.mockRejectedValue(new Error('API 500: boom'))
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-error')).toBeInTheDocument())
+    // Sanitized — never leak raw HTTP status/body into the Weekend surface.
+    expect(screen.getByTestId('weekend-error')).not.toHaveTextContent(/API 500|boom/i)
+    expect(screen.getByRole('button', { name: 'Retry' })).toBeInTheDocument()
+  })
+
+  it('retries the canonical read and recovers into a temporal state', async () => {
+    let calls = 0
+    mockContext.mockImplementation(async () => {
+      calls += 1
+      if (calls === 1) throw new Error('API 503: unavailable')
+      return context({ temporal_state: 'between_weekends' })
+    })
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-error')).toBeInTheDocument())
+    const retry = screen.getByRole('button', { name: 'Retry' })
+    fireEvent.click(retry)
+    await waitFor(() => expect(screen.getByTestId('weekend-between-races')).toBeInTheDocument())
+    expect(calls).toBe(2)
+    expect(screen.getByTestId('weekend-page')).toHaveAttribute(
+      'data-temporal-state',
+      'between_weekends',
+    )
+  })
+
+  it('failed canonical read creates zero seasons/meetings/weekend/live-state fanout', async () => {
+    mockContext.mockRejectedValue(new Error('API 503: unavailable'))
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-error')).toBeInTheDocument())
+    expect(mockSeasons).not.toHaveBeenCalled()
+    expect(mockMeetings).not.toHaveBeenCalled()
+    expect(mockWeekend).not.toHaveBeenCalled()
+    expect(mockHub).not.toHaveBeenCalled()
+    expect(mockNews).not.toHaveBeenCalled()
+  })
+
+  const stateCases: Array<[TemporalState, string]> = [
+    ['between_weekends', 'weekend-between-races'],
+    ['post_weekend', 'weekend-between-races'],
+    ['season_complete', 'weekend-between-races'],
+    ['pre_session', 'weekend-pre-session'],
+    ['between_sessions', 'weekend-between-sessions'],
+    ['session_settling', 'weekend-between-sessions'],
+    ['session_live', 'weekend-live'],
+  ]
+
+  it.each(stateCases)('renders a designed surface for canonical temporal_state %s', async (temporal, testid) => {
+    mockContext.mockResolvedValue(
+      context({
+        temporal_state: temporal,
+        previous_completed_session: ctxSession({ session: session({ session_key: 11, session_name: 'Race' }) }),
+        default_analysis_session: ctxSession({ session: session({ session_key: 11 }) }),
+        next_meeting: meeting({ meeting_key: 2, meeting_name: 'Hungarian Grand Prix', date_start: '2026-07-24T09:00:00Z' }),
+        next_session: ctxSession({ session: session({ session_key: 21, session_name: 'Practice 1', date_start: '2026-07-24T09:00:00Z' }) }),
+        active_session: temporal === 'session_live'
+          ? ctxSession({ session: session({ session_key: 12, session_name: 'Race' }), availability: availability({ live_session: 'active' }) })
+          : undefined,
+        focus_meeting: meeting(),
+      }),
+    )
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-page')).toHaveAttribute('data-temporal-state', temporal))
+    expect(screen.getByTestId(testid)).toBeInTheDocument()
+  })
+
+  it('renders the limited surface for no_season and never falls through to it for a valid payload', async () => {
+    mockContext.mockResolvedValue(context({ temporal_state: 'no_season', championship_round: 0, total_championship_rounds: 0 }))
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-limited')).toBeInTheDocument())
+  })
+
+  it('between-races pairs the completed analysis CTA with the next-event countdown and championship impact', async () => {
+    mockContext.mockResolvedValue(
+      context({
+        previous_completed_session: ctxSession({ session: session({ session_key: 11, session_name: 'Race' }) }),
+        default_analysis_session: ctxSession({ session: session({ session_key: 11 }) }),
+        next_meeting: meeting({ meeting_key: 2, meeting_name: 'Hungarian Grand Prix', date_start: '2026-07-24T09:00:00Z' }),
+        next_session: ctxSession({ session: session({ session_key: 21, session_name: 'Practice 1', date_start: '2026-07-24T09:00:00Z' }) }),
+      }),
+    )
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('wk-last-event')).toBeInTheDocument())
+    expect(screen.getByTestId('wk-next-event')).toBeInTheDocument()
+    const story = screen.getByTestId('wk-explore-race-story')
+    expect(story).toHaveAttribute('href', expect.stringContaining('session_key=11'))
+    expect(screen.getByTestId('wk-prepare')).toHaveAttribute('href', '/preview')
+    await waitFor(() => expect(screen.getByTestId('wk-champ-impact')).toBeInTheDocument())
+    expect(screen.getByTestId('wk-season-nav')).toHaveTextContent('Round 5 of 24')
+  })
+
+  it('does not fan out to season/meeting/OpenF1/live queries when the canonical context succeeds', async () => {
+    mockContext.mockResolvedValue(context({ temporal_state: 'between_weekends' }))
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-between-races')).toBeInTheDocument())
+    // Only supplementary championship + news reads are allowed; no season /
+    // meetings / sessions / live fan-out from the Weekend home hook.
+    expect(mockSeasons).not.toHaveBeenCalled()
+    expect(mockSessions).not.toHaveBeenCalled()
+    // fetchMeetings may still be reached only through the folded preview surface,
+    // which is not mounted in the between-races state.
+    expect(mockMeetings).not.toHaveBeenCalled()
+  })
+
+  it('supplementary reads stay dormant while the canonical context is pending', async () => {
+    mockContext.mockReturnValue(new Promise(() => {}))
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-loading')).toBeInTheDocument())
+    expect(mockHub).not.toHaveBeenCalled()
+    expect(mockNews).not.toHaveBeenCalled()
+  })
+
+  it('the /preview alias renders the preparation surface instead of looping back', async () => {
+    mockContext.mockResolvedValue(
+      context({
+        temporal_state: 'between_weekends',
+        next_meeting: meeting({ meeting_key: 2, meeting_name: 'Hungarian Grand Prix', date_start: '2026-07-24T09:00:00Z' }),
+        next_session: ctxSession({ session: session({ session_key: 21, session_name: 'Practice 1', date_start: '2026-07-24T09:00:00Z' }) }),
+      }),
+    )
+    renderAt('/preview')
+    await waitFor(() => expect(screen.getByTestId('weekend-pre-session')).toBeInTheDocument())
+    expect(screen.getByTestId('weekend-page')).toHaveAttribute('data-preview', 'true')
+    // The between-races surface must NOT be what /preview renders.
+    expect(screen.queryByTestId('weekend-between-races')).not.toBeInTheDocument()
+  })
+
+  it('pre_session embeds Preview with canonical meeting identity (no seasons/meetings re-resolve)', async () => {
+    const next = meeting({
+      meeting_key: 2,
+      meeting_name: 'Hungarian Grand Prix',
+      date_start: '2026-07-24T09:00:00Z',
+    })
+    mockContext.mockResolvedValue(
+      context({
+        temporal_state: 'pre_session',
+        next_meeting: next,
+        focus_meeting: next,
+        next_session: ctxSession({
+          session: session({
+            session_key: 21,
+            session_name: 'Practice 1',
+            meeting_key: 2,
+            date_start: '2026-07-24T09:00:00Z',
+          }),
+          meeting: next,
+          availability: availability({ freshness: 'partial', local_analysis: 'partial' }),
+        }),
+      }),
+    )
+    mockSessions.mockResolvedValue([
+      session({
+        session_key: 21,
+        session_name: 'Practice 1',
+        meeting_key: 2,
+        date_start: '2026-07-24T09:00:00Z',
+      }),
+    ])
+
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-pre-session')).toBeInTheDocument())
+    expect(screen.getByTestId('wk-pre-head')).toHaveTextContent('Hungarian Grand Prix')
+    expect(screen.getByTestId('weekend-data-notice')).toHaveTextContent(/Partial/i)
+
+    await waitFor(() => expect(screen.getByTestId('preview-page')).toBeInTheDocument())
+    expect(screen.getByTestId('preview-page')).toHaveAttribute('data-meeting-key', '2')
+    expect(screen.getByTestId('preview-page')).toHaveAttribute('data-embedded', 'true')
+    // Single shell notice — Preview must not stack a second freshness banner.
+    expect(screen.getByTestId('weekend-data-notice')).toHaveTextContent(/Partial/i)
+    expect(screen.queryByTestId('preview-data-notice')).not.toBeInTheDocument()
+    // Canonical identity was passed — Preview must not fan out to seasons /
+    // current-season meetings selection. Prior-year lookup for "Last year here"
+    // remains an intentional supplement.
+    expect(mockSeasons).not.toHaveBeenCalled()
+    expect(mockMeetings).not.toHaveBeenCalledWith(2026, expect.anything(), expect.anything())
+    expect(mockSessions).toHaveBeenCalledWith(2, 'auto', expect.anything())
+  })
+
+  it('preview supplement failure keeps the Weekend shell usable with sanitized Retry', async () => {
+    const next = meeting({
+      meeting_key: 2,
+      meeting_name: 'Hungarian Grand Prix',
+      date_start: '2026-07-24T09:00:00Z',
+    })
+    mockContext.mockResolvedValue(
+      context({
+        temporal_state: 'pre_session',
+        next_meeting: next,
+        focus_meeting: next,
+        next_session: ctxSession({
+          session: session({ session_key: 21, session_name: 'Practice 1', meeting_key: 2 }),
+          meeting: next,
+        }),
+      }),
+    )
+    let sessionCalls = 0
+    mockSessions.mockImplementation(async (meetingKey: number) => {
+      if (meetingKey !== 2) return []
+      sessionCalls += 1
+      if (sessionCalls === 1) throw new Error('API 500: sessions boom')
+      return [
+        session({
+          session_key: 21,
+          session_name: 'Practice 1',
+          meeting_key: 2,
+          date_start: '2026-07-24T09:00:00Z',
+        }),
+      ]
+    })
+
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('wk-pre-head')).toBeInTheDocument())
+    expect(screen.getByTestId('wk-pre-head')).toHaveTextContent('Hungarian Grand Prix')
+    await waitFor(() => expect(screen.getByTestId('preview-sessions-error')).toBeInTheDocument())
+    expect(screen.queryByText(/API 500|sessions boom/i)).not.toBeInTheDocument()
+
+    fireEvent.click(screen.getByTestId('preview-sessions-retry'))
+    await waitFor(() => expect(screen.getByTestId('preview-schedule')).toHaveTextContent('Practice 1'))
+    expect(sessionCalls).toBe(2)
+    expect(screen.queryByTestId('preview-sessions-error')).not.toBeInTheDocument()
+  })
+
+  it('Limited Retry refetches failed championship/news supplements once', async () => {
+    mockContext.mockResolvedValue(context({ temporal_state: 'between_weekends' }))
+    let hubCalls = 0
+    let newsCalls = 0
+    mockHub.mockImplementation(async () => {
+      hubCalls += 1
+      if (hubCalls === 1) throw new Error('API 503: hub')
+      return hub
+    })
+    mockNews.mockImplementation(async () => {
+      newsCalls += 1
+      if (newsCalls === 1) throw new Error('API 503: news')
+      return []
+    })
+
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-data-notice')).toHaveTextContent(/Limited/i))
+    const retry = screen.getByTestId('weekend-data-notice').querySelector('button')!
+    expect(retry).toBeEnabled()
+    fireEvent.click(retry)
+    fireEvent.click(retry)
+
+    await waitFor(() => expect(screen.queryByTestId('weekend-data-notice')).not.toBeInTheDocument())
+    expect(hubCalls).toBe(2)
+    expect(newsCalls).toBe(2)
+    // Canonical context is not the failed resource — only one initial fetch.
+    expect(mockContext).toHaveBeenCalledTimes(1)
+  })
+
+  it('Limited Retry exposes disabled Retrying… aria-busy while deferred supplements recover', async () => {
+    mockContext.mockResolvedValue(context({ temporal_state: 'between_weekends' }))
+    let hubCalls = 0
+    let newsCalls = 0
+    let resolveHub!: (value: ChampionshipHub) => void
+    let resolveNews!: (value: []) => void
+    mockHub.mockImplementation(
+      () =>
+        new Promise<ChampionshipHub>((resolve, reject) => {
+          hubCalls += 1
+          if (hubCalls === 1) {
+            reject(new Error('API 503: hub'))
+            return
+          }
+          resolveHub = resolve
+        }),
+    )
+    mockNews.mockImplementation(
+      () =>
+        new Promise<[]>((resolve, reject) => {
+          newsCalls += 1
+          if (newsCalls === 1) {
+            reject(new Error('API 503: news'))
+            return
+          }
+          resolveNews = resolve
+        }),
+    )
+
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-data-notice')).toHaveTextContent(/Limited/i))
+    expect(mockContext).toHaveBeenCalledTimes(1)
+
+    fireEvent.click(screen.getByRole('button', { name: 'Retry' }))
+    await waitFor(() => expect(screen.getByRole('button', { name: 'Retrying…' })).toBeDisabled())
+    expect(screen.getByRole('button', { name: 'Retrying…' })).toHaveAttribute('aria-busy', 'true')
+    // Double-click while pending must not issue extra supplement or context requests.
+    fireEvent.click(screen.getByRole('button', { name: 'Retrying…' }))
+    expect(hubCalls).toBe(2)
+    expect(newsCalls).toBe(2)
+    expect(mockContext).toHaveBeenCalledTimes(1)
+
+    resolveHub(hub)
+    resolveNews([])
+    await waitFor(() => expect(screen.queryByTestId('weekend-data-notice')).not.toBeInTheDocument())
+    expect(hubCalls).toBe(2)
+    expect(newsCalls).toBe(2)
+    expect(mockContext).toHaveBeenCalledTimes(1)
+  })
+
+  it('between-sessions header local/local suppresses Archive from terminal previous', async () => {
+    const focus = meeting({
+      meeting_key: 2,
+      meeting_name: 'Belgian Grand Prix',
+      date_start: '2026-07-10T09:00:00Z',
+    })
+    const previous = meeting({
+      meeting_key: 1,
+      meeting_name: 'British Grand Prix',
+      circuit_short_name: 'Silverstone',
+      date_start: '2026-07-05T09:00:00Z',
+    })
+    const payload = context({
+      temporal_state: 'between_sessions',
+      focus_meeting: focus,
+      next_meeting: focus,
+      previous_meeting: previous,
+      next_session: ctxSession({
+        session: session({
+          session_key: 21,
+          session_name: 'Practice 1',
+          meeting_key: 2,
+          date_start: '2026-07-10T09:00:00Z',
+        }),
+        meeting: focus,
+        availability: availability({ source: 'local', freshness: 'local' }),
+      }),
+      previous_completed_session: ctxSession({
+        session: session({
+          session_key: 99,
+          session_name: 'Race',
+          session_type: 'Race',
+          meeting_key: 1,
+          date_start: '2026-07-05T14:00:00Z',
+        }),
+        meeting: previous,
+        availability: availability({ source: 'fia', freshness: 'archive', archive: 'available' }),
+      }),
+    })
+    rememberResponseAvailability(payload, { source: 'local', freshness: 'local' })
+    mockContext.mockResolvedValue(payload)
+
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-between-sessions')).toBeInTheDocument())
+    expect(screen.queryByTestId('weekend-data-notice')).not.toBeInTheDocument()
+    expect(screen.queryByText(/archived snapshot/i)).not.toBeInTheDocument()
+  })
+
+  it('pre_session keeps shell Partial while disclosing distinct Preview stale', async () => {
+    const next = meeting({
+      meeting_key: 2,
+      meeting_name: 'Hungarian Grand Prix',
+      date_start: '2026-07-24T09:00:00Z',
+    })
+    mockContext.mockResolvedValue(
+      context({
+        temporal_state: 'pre_session',
+        next_meeting: next,
+        focus_meeting: next,
+        next_session: ctxSession({
+          session: session({
+            session_key: 21,
+            session_name: 'Practice 1',
+            meeting_key: 2,
+            date_start: '2026-07-24T09:00:00Z',
+          }),
+          meeting: next,
+          availability: availability({ freshness: 'partial', local_analysis: 'partial' }),
+        }),
+      }),
+    )
+    mockSessions.mockResolvedValue([
+      session({
+        session_key: 21,
+        session_name: 'Practice 1',
+        meeting_key: 2,
+        date_start: '2026-07-24T09:00:00Z',
+      }),
+    ])
+    rememberResponseAvailability(hub, { source: 'openf1', freshness: 'stale' })
+    mockHub.mockResolvedValue(hub)
+
+    renderAt('/')
+    await waitFor(() => expect(screen.getByTestId('weekend-data-notice')).toHaveTextContent(/Partial/i))
+    await waitFor(() => expect(screen.getByTestId('preview-data-notice')).toHaveTextContent(/Stale/i))
+  })
+
+  it('restores Race Hub meeting/session focus from the Weekend URL search contract', async () => {
+    mockContext.mockResolvedValue(
+      context({
+        temporal_state: 'season_complete',
+        previous_completed_session: ctxSession({ session: session({ session_key: 11, session_name: 'Race' }) }),
+        default_analysis_session: ctxSession({ session: session({ session_key: 11 }) }),
+      }),
+    )
+    renderAt('/?meeting_key=1&session_key=11')
+    await waitFor(() => expect(screen.getByTestId('wk-focus-context')).toBeInTheDocument())
+    expect(screen.getByTestId('weekend-page')).toHaveAttribute('data-meeting-key', '1')
+    expect(screen.getByTestId('weekend-page')).toHaveAttribute('data-session-key', '11')
+    await waitFor(() =>
+      expect(screen.getByTestId('wk-focus-meeting')).toHaveTextContent('British Grand Prix'),
+    )
+    await waitFor(() =>
+      expect(screen.getByTestId('wk-focus-session')).toHaveTextContent('Race'),
+    )
+    const continueAnalysis = screen.getByRole('link', { name: /Continue analysis/i })
+    expect(continueAnalysis).toHaveAttribute('href', expect.stringContaining('session_key=11'))
+    expect(mockWeekend).toHaveBeenCalledWith(1)
+  })
+})

frontend/src/test/availability.test.ts

@@ -0,0 +1,344 @@
+import { describe, expect, it, vi, beforeEach, afterEach } from 'vitest'
+import { QueryClient, QueryObserver } from '@tanstack/react-query'
+import {
+  apiFetch,
+  availabilityAwareStructuralSharing,
+  clearApiFetchInflight,
+  DATA_FRESHNESS_HEADER,
+  DATA_SOURCE_HEADER,
+  getResponseAvailability,
+  rememberResponseAvailability,
+} from '../lib/fetch'
+import {
+  aggregateNotices,
+  noticeFromFreshness,
+  noticeFromResponse,
+  shouldShowEmbeddedNotice,
+  weekendContextNotice,
+} from '../lib/availability'
+import type { WeekendContext } from '../types'
+
+describe('response availability metadata', () => {
+  beforeEach(() => {
+    clearApiFetchInflight()
+  })
+
+  afterEach(() => {
+    vi.unstubAllGlobals()
+    clearApiFetchInflight()
+  })
+
+  it('captures CORS-readable source/freshness headers without changing the payload shape', async () => {
+    const body = { season: 2026, drivers: [{ points: 1 }] }
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () =>
+        new Response(JSON.stringify(body), {
+          status: 200,
+          headers: {
+            'Content-Type': 'application/json',
+            [DATA_SOURCE_HEADER]: 'openf1',
+            [DATA_FRESHNESS_HEADER]: 'stale',
+          },
+        }),
+      ),
+    )
+
+    const data = await apiFetch<typeof body>('/api/v1/championship/hub')
+    expect(data).toEqual(body)
+    expect(getResponseAvailability(data)).toEqual({ source: 'openf1', freshness: 'stale' })
+  })
+
+  it('preserves metadata through deduped in-flight subscribers', async () => {
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () =>
+        new Response(JSON.stringify({ ok: true }), {
+          status: 200,
+          headers: {
+            'Content-Type': 'application/json',
+            [DATA_SOURCE_HEADER]: 'local',
+            [DATA_FRESHNESS_HEADER]: 'partial',
+          },
+        }),
+      ),
+    )
+
+    const a = apiFetch<{ ok: boolean }>('/api/v1/shared', { dedupeKey: 'meta-shared' })
+    const b = apiFetch<{ ok: boolean }>('/api/v1/shared', { dedupeKey: 'meta-shared' })
+    const [ra, rb] = await Promise.all([a, b])
+    expect(ra).toBe(rb)
+    expect(getResponseAvailability(ra)).toEqual({ source: 'local', freshness: 'partial' })
+  })
+
+  it('maps only reported freshness values and never invents stale', () => {
+    expect(noticeFromFreshness('stale')).toBe('stale')
+    expect(noticeFromFreshness('partial')).toBe('partial')
+    expect(noticeFromFreshness('local')).toBe('local')
+    expect(noticeFromFreshness('limited')).toBe('limited')
+    expect(noticeFromFreshness('archive')).toBe('archive')
+    expect(noticeFromFreshness('fresh')).toBeNull()
+    expect(noticeFromFreshness('live')).toBeNull()
+    expect(noticeFromFreshness(undefined)).toBeNull()
+    expect(noticeFromFreshness('local', { includeLocal: false })).toBeNull()
+  })
+
+  it('reads notice from WeakMap metadata attached to a successful payload', () => {
+    const hub = { season: 2025, drivers: [] as unknown[] }
+    rememberResponseAvailability(hub, { source: 'openf1', freshness: 'stale' })
+    expect(noticeFromResponse(hub)).toBe('stale')
+  })
+
+  it('dedupes only equivalent embedded Preview notices', () => {
+    expect(shouldShowEmbeddedNotice('stale', 'partial')).toBe(true)
+    expect(shouldShowEmbeddedNotice('partial', 'partial')).toBe(false)
+    expect(shouldShowEmbeddedNotice('stale', null)).toBe(true)
+    expect(shouldShowEmbeddedNotice(null, 'partial')).toBe(false)
+  })
+
+  it('aggregates conflicting sources by severity so Local cannot mask worse truth', () => {
+    expect(aggregateNotices(['local', 'stale'])).toBe('stale')
+    expect(aggregateNotices(['local', 'partial'])).toBe('partial')
+    expect(aggregateNotices(['local', 'limited'])).toBe('limited')
+    expect(aggregateNotices(['local', 'archive'])).toBe('archive')
+    expect(aggregateNotices(['stale', 'partial', 'local'])).toBe('partial')
+    expect(aggregateNotices(['stale', 'stale', null])).toBe('stale')
+    expect(aggregateNotices([null, undefined])).toBeNull()
+  })
+
+  it('derives Weekend Context notices from typed session freshness, skipping routine local', () => {
+    const context: WeekendContext = {
+      season: 2026,
+      temporal_state: 'pre_session',
+      championship_round: 1,
+      total_championship_rounds: 24,
+      focus_meeting: {
+        meeting_key: 2,
+        meeting_name: 'Belgian Grand Prix',
+        meeting_official_name: '',
+        location: 'Spa',
+        country_name: 'Belgium',
+        country_code: 'BEL',
+        country_flag: '',
+        circuit_key: 7,
+        circuit_short_name: 'Spa',
+        date_start: '2026-07-24T09:00:00Z',
+        date_end: '2026-07-26T16:00:00Z',
+        year: 2026,
+      },
+      next_session: {
+        session: {
+          session_key: 21,
+          session_name: 'FP1',
+          session_type: 'Practice',
+          meeting_key: 2,
+          date_start: '2026-07-24T09:00:00Z',
+          date_end: '2026-07-24T10:00:00Z',
+          gmt_offset: '',
+        },
+        meeting: {
+          meeting_key: 2,
+          meeting_name: 'Belgian Grand Prix',
+          meeting_official_name: '',
+          location: 'Spa',
+          country_name: 'Belgium',
+          country_code: 'BEL',
+          country_flag: '',
+          circuit_key: 7,
+          circuit_short_name: 'Spa',
+          date_start: '2026-07-24T09:00:00Z',
+          date_end: '2026-07-26T16:00:00Z',
+          year: 2026,
+        },
+        availability: {
+          source: 'local',
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'partial',
+          freshness: 'partial',
+          limitations: [],
+        },
+      },
+    }
+    expect(weekendContextNotice(context)).toBe('partial')
+
+    const localOnly: WeekendContext = {
+      ...context,
+      next_session: {
+        ...context.next_session!,
+        availability: {
+          ...context.next_session!.availability,
+          local_analysis: 'pending',
+          freshness: 'local',
+        },
+      },
+    }
+    expect(weekendContextNotice(localOnly)).toBeNull()
+  })
+
+  it('authoritative Weekend header local/local does not fall through to previous archive', () => {
+    const focusMeeting = {
+      meeting_key: 2,
+      meeting_name: 'Belgian Grand Prix',
+      meeting_official_name: '',
+      location: 'Spa',
+      country_name: 'Belgium',
+      country_code: 'BEL',
+      country_flag: '',
+      circuit_key: 7,
+      circuit_short_name: 'Spa',
+      date_start: '2026-07-10T09:00:00Z',
+      date_end: '2026-07-12T16:00:00Z',
+      year: 2026,
+    }
+    const previousMeeting = {
+      ...focusMeeting,
+      meeting_key: 1,
+      meeting_name: 'British Grand Prix',
+      circuit_short_name: 'Silverstone',
+      location: 'Silverstone',
+      country_name: 'United Kingdom',
+      country_code: 'GBR',
+    }
+    const context: WeekendContext = {
+      season: 2026,
+      temporal_state: 'between_sessions',
+      championship_round: 12,
+      total_championship_rounds: 24,
+      focus_meeting: focusMeeting,
+      next_session: {
+        session: {
+          session_key: 21,
+          session_name: 'Practice 1',
+          session_type: 'Practice',
+          meeting_key: 2,
+          date_start: '2026-07-10T09:00:00Z',
+          date_end: '2026-07-10T10:00:00Z',
+          gmt_offset: '',
+        },
+        meeting: focusMeeting,
+        availability: {
+          source: 'local',
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'unavailable',
+          local_analysis: 'pending',
+          freshness: 'local',
+          limitations: [],
+        },
+      },
+      previous_completed_session: {
+        session: {
+          session_key: 99,
+          session_name: 'Race',
+          session_type: 'Race',
+          meeting_key: 1,
+          date_start: '2026-07-05T14:00:00Z',
+          date_end: '2026-07-05T16:00:00Z',
+          gmt_offset: '',
+        },
+        meeting: previousMeeting,
+        availability: {
+          source: 'fia',
+          schedule: 'available',
+          live_transport: 'unknown',
+          live_session: 'inactive',
+          archive: 'available',
+          local_analysis: 'complete',
+          freshness: 'archive',
+          limitations: [],
+        },
+      },
+    }
+
+    rememberResponseAvailability(context, { source: 'local', freshness: 'local' })
+    expect(weekendContextNotice(context)).toBeNull()
+
+    // Without an authoritative header, typed focus (upcoming local) still suppresses Local.
+    const noHeader: WeekendContext = { ...context }
+    expect(weekendContextNotice(noHeader)).toBeNull()
+  })
+
+  it('updates metadata when structural sharing reuses an equal JSON object', () => {
+    const body = { season: 2026, drivers: [{ points: 1 }] }
+    const first = structuredClone(body)
+    const second = structuredClone(body)
+    rememberResponseAvailability(first, { source: 'openf1', freshness: 'stale' })
+    rememberResponseAvailability(second, { source: 'openf1', freshness: 'fresh' })
+
+    const shared = availabilityAwareStructuralSharing(first, second)
+    expect(shared).toBe(first)
+    expect(getResponseAvailability(shared)).toEqual({ source: 'openf1', freshness: 'fresh' })
+    expect(noticeFromResponse(shared)).toBeNull()
+
+    const third = structuredClone(body)
+    rememberResponseAvailability(third, { source: 'openf1', freshness: 'partial' })
+    const sharedAgain = availabilityAwareStructuralSharing(shared, third)
+    expect(sharedAgain).toBe(first)
+    expect(noticeFromResponse(sharedAgain)).toBe('partial')
+  })
+
+  it('QueryObserver stale→fresh and fresh→partial refetches update metadata and notices', async () => {
+    const body = { season: 2026, drivers: [{ points: 42 }] }
+    const sequence: Array<'stale' | 'fresh' | 'partial'> = ['stale', 'fresh', 'partial']
+    let call = 0
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () => {
+        const freshness = sequence[Math.min(call, sequence.length - 1)]
+        call += 1
+        return new Response(JSON.stringify(body), {
+          status: 200,
+          headers: {
+            'Content-Type': 'application/json',
+            [DATA_SOURCE_HEADER]: 'openf1',
+            [DATA_FRESHNESS_HEADER]: freshness,
+          },
+        })
+      }),
+    )
+
+    const client = new QueryClient({
+      defaultOptions: {
+        queries: {
+          retry: false,
+          structuralSharing: availabilityAwareStructuralSharing,
+        },
+      },
+    })
+    const observer = new QueryObserver(client, {
+      queryKey: ['availability-observer'],
+      queryFn: () => apiFetch<typeof body>('/api/v1/championship/hub'),
+      staleTime: 0,
+    })
+
+    const notices: Array<string | null> = []
+    const unsub = observer.subscribe((result) => {
+      if (result.data) notices.push(noticeFromResponse(result.data))
+    })
+
+    await observer.refetch()
+    expect(noticeFromResponse(observer.getCurrentResult().data)).toBe('stale')
+    expect(notices[notices.length - 1]).toBe('stale')
+
+    await observer.refetch()
+    expect(observer.getCurrentResult().data).toEqual(body)
+    expect(getResponseAvailability(observer.getCurrentResult().data!)).toEqual({
+      source: 'openf1',
+      freshness: 'fresh',
+    })
+    expect(noticeFromResponse(observer.getCurrentResult().data)).toBeNull()
+    expect(notices[notices.length - 1]).toBeNull()
+
+    await observer.refetch()
+    expect(noticeFromResponse(observer.getCurrentResult().data)).toBe('partial')
+    expect(notices[notices.length - 1]).toBe('partial')
+    expect(call).toBe(3)
+
+    unsub()
+    client.clear()
+  })
+})

frontend/src/test/fetch.test.ts

@@ -0,0 +1,291 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  ApiError,
+  apiFetch,
+  clearApiFetchInflight,
+  DEFAULT_FETCH_TIMEOUT_MS,
+  isTimeoutError,
+  userFacingError,
+} from '../lib/fetch'
+
+describe('apiFetch', () => {
+  beforeEach(() => {
+    clearApiFetchInflight()
+    vi.useFakeTimers()
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+    vi.unstubAllGlobals()
+    clearApiFetchInflight()
+  })
+
+  it('resolves JSON within the timeout boundary', async () => {
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () =>
+        new Response(JSON.stringify({ ok: true }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        }),
+      ),
+    )
+
+    await expect(apiFetch<{ ok: boolean }>('/api/v1/ping')).resolves.toEqual({ ok: true })
+  })
+
+  it('times out and leaves no hanging promise after the deadline', async () => {
+    vi.stubGlobal(
+      'fetch',
+      vi.fn((_url: string, init?: RequestInit) => {
+        return new Promise<Response>((_resolve, reject) => {
+          const signal = init?.signal
+          if (!signal) return
+          signal.addEventListener('abort', () => {
+            reject(new DOMException('Aborted', 'AbortError'))
+          })
+        })
+      }),
+    )
+
+    const pending = apiFetch('/api/v1/slow', { timeoutMs: 1000 })
+    const assertion = expect(pending).rejects.toSatisfy(
+      (err: unknown) => isTimeoutError(err) && userFacingError(err).includes('too long'),
+    )
+
+    await vi.advanceTimersByTimeAsync(1000)
+    await assertion
+  })
+
+  it('propagates caller abort as an ApiError', async () => {
+    vi.stubGlobal(
+      'fetch',
+      vi.fn((_url: string, init?: RequestInit) => {
+        return new Promise<Response>((_resolve, reject) => {
+          init?.signal?.addEventListener('abort', () => {
+            reject(new DOMException('Aborted', 'AbortError'))
+          })
+        })
+      }),
+    )
+
+    const controller = new AbortController()
+    const pending = apiFetch('/api/v1/abort-me', {
+      signal: controller.signal,
+      timeoutMs: 30_000,
+    })
+    const assertion = expect(pending).rejects.toMatchObject({ kind: 'abort' })
+    controller.abort()
+    await assertion
+  })
+
+  it('deduplicates concurrent in-flight requests for the same key', async () => {
+    let starts = 0
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () => {
+        starts += 1
+        await new Promise((r) => setTimeout(r, 50))
+        return new Response(JSON.stringify({ n: starts }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        })
+      }),
+    )
+
+    const a = apiFetch<{ n: number }>('/api/v1/shared', { dedupeKey: 'shared' })
+    const b = apiFetch<{ n: number }>('/api/v1/shared', { dedupeKey: 'shared' })
+    await vi.advanceTimersByTimeAsync(50)
+    const [ra, rb] = await Promise.all([a, b])
+    expect(starts).toBe(1)
+    expect(ra).toEqual(rb)
+  })
+
+  it('does not poison a second caller when the first aborts the same dedupe key', async () => {
+    let starts = 0
+    vi.stubGlobal(
+      'fetch',
+      vi.fn((_url: string, init?: RequestInit) => {
+        starts += 1
+        return new Promise<Response>((resolve, reject) => {
+          const timer = setTimeout(() => {
+            resolve(
+              new Response(JSON.stringify({ ok: true, starts }), {
+                status: 200,
+                headers: { 'Content-Type': 'application/json' },
+              }),
+            )
+          }, 100)
+          init?.signal?.addEventListener(
+            'abort',
+            () => {
+              clearTimeout(timer)
+              reject(new DOMException('Aborted', 'AbortError'))
+            },
+            { once: true },
+          )
+        })
+      }),
+    )
+
+    const first = new AbortController()
+    const second = new AbortController()
+    const a = apiFetch<{ ok: boolean }>('/api/v1/shared', {
+      dedupeKey: 'shared-abort-safe',
+      signal: first.signal,
+      timeoutMs: 30_000,
+    })
+    const b = apiFetch<{ ok: boolean }>('/api/v1/shared', {
+      dedupeKey: 'shared-abort-safe',
+      signal: second.signal,
+      timeoutMs: 30_000,
+    })
+
+    first.abort()
+    await expect(a).rejects.toMatchObject({ kind: 'abort' })
+
+    await vi.advanceTimersByTimeAsync(100)
+    await expect(b).resolves.toEqual({ ok: true, starts: 1 })
+    expect(starts).toBe(1)
+  })
+
+  it('cancels the shared request only after the last subscriber aborts', async () => {
+    let aborted = false
+    vi.stubGlobal(
+      'fetch',
+      vi.fn((_url: string, init?: RequestInit) => {
+        return new Promise<Response>((_resolve, reject) => {
+          init?.signal?.addEventListener(
+            'abort',
+            () => {
+              aborted = true
+              reject(new DOMException('Aborted', 'AbortError'))
+            },
+            { once: true },
+          )
+        })
+      }),
+    )
+
+    const first = new AbortController()
+    const second = new AbortController()
+    const a = apiFetch('/api/v1/shared', {
+      dedupeKey: 'shared-last-abort',
+      signal: first.signal,
+      timeoutMs: 30_000,
+    })
+    const b = apiFetch('/api/v1/shared', {
+      dedupeKey: 'shared-last-abort',
+      signal: second.signal,
+      timeoutMs: 30_000,
+    })
+
+    first.abort()
+    await expect(a).rejects.toMatchObject({ kind: 'abort' })
+    expect(aborted).toBe(false)
+
+    second.abort()
+    await expect(b).rejects.toMatchObject({ kind: 'abort' })
+    expect(aborted).toBe(true)
+  })
+
+  it('survives a Strict Mode style remount: aborted first consumer, fresh second consumer', async () => {
+    let starts = 0
+    vi.stubGlobal(
+      'fetch',
+      vi.fn((_url: string, init?: RequestInit) => {
+        starts += 1
+        return new Promise<Response>((resolve, reject) => {
+          const timer = setTimeout(() => {
+            resolve(
+              new Response(JSON.stringify({ starts }), {
+                status: 200,
+                headers: { 'Content-Type': 'application/json' },
+              }),
+            )
+          }, 50)
+          init?.signal?.addEventListener(
+            'abort',
+            () => {
+              clearTimeout(timer)
+              reject(new DOMException('Aborted', 'AbortError'))
+            },
+            { once: true },
+          )
+        })
+      }),
+    )
+
+    // Mount #1
+    const first = new AbortController()
+    const pendingFirst = apiFetch<{ starts: number }>('/api/v1/seasons', {
+      dedupeKey: 'seasons',
+      signal: first.signal,
+      timeoutMs: 30_000,
+    })
+
+    // Strict Mode unmount cancels the first subscription (sole subscriber → shared abort)
+    first.abort()
+    await expect(pendingFirst).rejects.toMatchObject({ kind: 'abort' })
+
+    // Remount starts a fresh consumer — must not inherit the aborted request
+    const second = new AbortController()
+    const pendingSecond = apiFetch<{ starts: number }>('/api/v1/seasons', {
+      dedupeKey: 'seasons',
+      signal: second.signal,
+      timeoutMs: 30_000,
+    })
+
+    await vi.advanceTimersByTimeAsync(50)
+    await expect(pendingSecond).resolves.toEqual({ starts: 2 })
+    expect(starts).toBe(2)
+  })
+
+  it('allows an explicit retry after the prior request settles', async () => {
+    let starts = 0
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () => {
+        starts += 1
+        return new Response(JSON.stringify({ starts }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        })
+      }),
+    )
+
+    await expect(apiFetch('/api/v1/retry', { dedupeKey: 'retry-once' })).resolves.toEqual({
+      starts: 1,
+    })
+    await expect(apiFetch('/api/v1/retry', { dedupeKey: 'retry-once' })).resolves.toEqual({
+      starts: 2,
+    })
+    expect(starts).toBe(2)
+  })
+
+  it('maps HTTP errors without raw status jargon in userFacingError', async () => {
+    vi.stubGlobal(
+      'fetch',
+      vi.fn(async () =>
+        new Response(JSON.stringify({ error: 'upstream failed', stale: true }), {
+          status: 502,
+          headers: { 'Content-Type': 'application/json' },
+        }),
+      ),
+    )
+
+    try {
+      await apiFetch('/api/v1/fail')
+      expect.unreachable('should throw')
+    } catch (err) {
+      expect(err).toBeInstanceOf(ApiError)
+      expect((err as ApiError).stale).toBe(true)
+      expect(userFacingError(err)).not.toMatch(/502|API /)
+      expect(userFacingError(err)).toMatch(/cached|Retry/i)
+    }
+  })
+
+  it('uses the default primary-route timeout', () => {
+    expect(DEFAULT_FETCH_TIMEOUT_MS).toBe(15_000)
+  })
+})

frontend/src/test/live.test.ts

@@ -1,15 +1,12 @@
 import { describe, expect, it } from 'vitest'
 import {
-  bestLapGaps,
   compoundClass,
   compoundLetter,
   extrapolateClock,
-  isLiveSessionActive,
   latestRaceControl,
   liveSessionDisplay,
   loadPinnedDrivers,
   mergeVisibleSectors,
-  parseLapTimeSeconds,
   positionDeltaClass,
   parseLiveStateEvent,
   rcFlagClass,
@@ -282,43 +279,6 @@ describe('live qualifying display', () => {
   })
 })
 
-describe('practice/qualifying computed gaps', () => {
-  it('parses lap-time strings into seconds and rejects invalid input', () => {
-    expect(parseLapTimeSeconds('1:45.944')).toBeCloseTo(105.944, 3)
-    expect(parseLapTimeSeconds('45.944')).toBeCloseTo(45.944, 3)
-    expect(parseLapTimeSeconds('')).toBeNull()
-    expect(parseLapTimeSeconds(undefined)).toBeNull()
-    expect(parseLapTimeSeconds('-')).toBeNull()
-    expect(parseLapTimeSeconds('nope')).toBeNull()
-  })
-
-  it('derives a gap to P1 from valid best laps only, flagging the leader', () => {
-    const gaps = bestLapGaps([
-      timingRow('1', 1, { BestLapTime: '1:45.944' }),
-      timingRow('4', 2, { BestLapTime: '1:46.134' }),
-      timingRow('16', 3, { BestLapTime: '' }),
-    ])
-    expect(gaps['1']).toEqual({ isLeader: true, gap: '' })
-    expect(gaps['4']).toEqual({ isLeader: false, gap: '+0.190' })
-    // No valid best lap → no fabricated gap.
-    expect(gaps['16']).toBeUndefined()
-  })
-
-  it('returns no gaps when nobody has set a lap', () => {
-    expect(bestLapGaps([timingRow('1', 1, { BestLapTime: '' })])).toEqual({})
-  })
-})
-
-describe('live session activity', () => {
-  it('is active only when the feed reports a live session with data', () => {
-    expect(isLiveSessionActive({ is_live: true, data: snapshot })).toBe(true)
-    expect(isLiveSessionActive({ is_live: true, data: null })).toBe(false)
-    expect(isLiveSessionActive({ is_live: false, data: snapshot })).toBe(false)
-    expect(isLiveSessionActive(null)).toBe(false)
-    expect(isLiveSessionActive(undefined)).toBe(false)
-  })
-})
-
 describe('visible sector display', () => {
   it('holds S1 and S2 through temporary blanks while a flying lap is active', () => {
     const first = [timingRow('4', 1, {

frontend/src/test/liveState.test.ts

@@ -0,0 +1,183 @@
+import { describe, expect, it } from 'vitest'
+import {
+  allowsLiveInterpretations,
+  deriveLivePhase,
+  effectiveFeedHealth,
+  isReadOnlyPhase,
+  rendersSnapshot,
+  terminalSessionStatus,
+  type LiveStateInputs,
+} from '../lib/liveState'
+
+const base: LiveStateInputs = {
+  transport: 'connecting',
+  isLive: false,
+  hasActiveSnapshot: false,
+  hasArchive: false,
+  archiveMode: false,
+  sessionEndedCleanly: false,
+  wasLive: false,
+  stateLoaded: false,
+}
+
+describe('terminalSessionStatus', () => {
+  it('recognizes genuine session-end statuses', () => {
+    for (const s of ['Finished', 'Finalised', 'Finalized', 'ENDED', 'Aborted']) {
+      expect(terminalSessionStatus(s)).toBe(true)
+    }
+  })
+
+  it('treats still-running / unknown statuses as non-terminal', () => {
+    for (const s of ['Started', 'Resumed', 'Inactive', '', undefined, null]) {
+      expect(terminalSessionStatus(s)).toBe(false)
+    }
+  })
+})
+
+describe('deriveLivePhase transitions', () => {
+  it('connecting: cold start with the feed still opening', () => {
+    expect(deriveLivePhase({ ...base, transport: 'connecting' })).toBe('connecting')
+  })
+
+  it('connecting → live once a session snapshot arrives', () => {
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'connected',
+        isLive: true,
+        hasActiveSnapshot: true,
+      }),
+    ).toBe('live')
+  })
+
+  it('live → disconnected when the SSE transport drops mid-session', () => {
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'disconnected',
+        isLive: true,
+        hasActiveSnapshot: true,
+        wasLive: true,
+      }),
+    ).toBe('disconnected')
+  })
+
+  it('live → settling when the session ends with a terminal status', () => {
+    // Feed reports is_live=false, transport healthy, retained snapshot carries a
+    // terminal SessionStatus → the session genuinely finished.
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'connected',
+        isLive: false,
+        hasArchive: true,
+        sessionEndedCleanly: true,
+        wasLive: true,
+      }),
+    ).toBe('settling')
+  })
+
+  it('live → disconnected (NOT settling) when the FIA feed drops but status is non-terminal', () => {
+    // This is the P0 case: server deactivate() moved a still-active snapshot to
+    // last_snapshot with is_live=false but a non-terminal SessionStatus. The
+    // browser transport is healthy. We must warn + retain, never settle/archive.
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'connected',
+        isLive: false,
+        hasArchive: true,
+        sessionEndedCleanly: false,
+        wasLive: true,
+      }),
+    ).toBe('disconnected')
+  })
+
+  it('a retained non-terminal snapshot on cold load is disconnected, not settling', () => {
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'connected',
+        isLive: false,
+        hasArchive: true,
+        sessionEndedCleanly: false,
+        wasLive: false,
+      }),
+    ).toBe('disconnected')
+  })
+
+  it('settling → archive when the user explicitly opens the read-only snapshot', () => {
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'connected',
+        isLive: false,
+        hasArchive: true,
+        sessionEndedCleanly: true,
+        archiveMode: true,
+      }),
+    ).toBe('archive')
+  })
+
+  it('archive mode wins over an active session (user-chosen read-only view)', () => {
+    expect(
+      deriveLivePhase({
+        ...base,
+        transport: 'connected',
+        isLive: true,
+        hasActiveSnapshot: true,
+        hasArchive: true,
+        archiveMode: true,
+      }),
+    ).toBe('archive')
+  })
+
+  it('inactive when there is no session and nothing retained', () => {
+    expect(deriveLivePhase({ ...base, transport: 'connected', stateLoaded: true })).toBe('inactive')
+  })
+
+  it('leaves connecting for inactive once the initial state resolves, even mid-handshake', () => {
+    // connecting → inactive: the SSE transport handshake is still pending
+    // (transport === "connecting") but the initial live-state query resolved as
+    // idle, so we must not spin on "connecting…" forever.
+    expect(deriveLivePhase({ ...base, transport: 'connecting', stateLoaded: true })).toBe('inactive')
+  })
+})
+
+describe('phase capability helpers', () => {
+  it('renders the snapshot surface only for live/disconnected/archive', () => {
+    expect(rendersSnapshot('live')).toBe(true)
+    expect(rendersSnapshot('disconnected')).toBe(true)
+    expect(rendersSnapshot('archive')).toBe(true)
+    expect(rendersSnapshot('settling')).toBe(false)
+    expect(rendersSnapshot('inactive')).toBe(false)
+    expect(rendersSnapshot('connecting')).toBe(false)
+  })
+
+  it('allows live-only interpretations only while the session is moving', () => {
+    expect(allowsLiveInterpretations('live')).toBe(true)
+    expect(allowsLiveInterpretations('disconnected')).toBe(true)
+    // A frozen archive frame must never present live-only interpretations.
+    expect(allowsLiveInterpretations('archive')).toBe(false)
+    expect(allowsLiveInterpretations('settling')).toBe(false)
+  })
+
+  it('marks archive as the read-only phase', () => {
+    expect(isReadOnlyPhase('archive')).toBe(true)
+    expect(isReadOnlyPhase('live')).toBe(false)
+    expect(isReadOnlyPhase('disconnected')).toBe(false)
+  })
+})
+
+describe('effectiveFeedHealth', () => {
+  it('downgrades a still-open SSE to reconnecting while phase is disconnected', () => {
+    expect(effectiveFeedHealth('connected', 'disconnected')).toBe('disconnected')
+    expect(effectiveFeedHealth('connecting', 'disconnected')).toBe('disconnected')
+  })
+
+  it('preserves transport when the session phase is live or settling', () => {
+    expect(effectiveFeedHealth('connected', 'live')).toBe('connected')
+    expect(effectiveFeedHealth('connected', 'settling')).toBe('connected')
+    expect(effectiveFeedHealth('error', 'disconnected')).toBe('error')
+  })
+})

frontend/src/test/route-resilience.test.tsx

@@ -0,0 +1,102 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { render, screen, waitFor, fireEvent } from '@testing-library/react'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { RouterProvider, createRouter, createRootRoute, createRoute } from '@tanstack/react-router'
+import { DriverProfilePage } from '../pages/DriverProfilePage'
+import { ApiError } from '../lib/fetch'
+import type { DriverSummary } from '../types'
+
+vi.mock('../api', () => ({
+  fetchSeasons: vi.fn(),
+  fetchDriverSummary: vi.fn(),
+}))
+
+import { fetchSeasons, fetchDriverSummary } from '../api'
+
+const mockFetchSeasons = vi.mocked(fetchSeasons)
+const mockFetchSummary = vi.mocked(fetchDriverSummary)
+
+const summary: DriverSummary = {
+  season: 2025,
+  driver_number: 1,
+  name_acronym: 'VER',
+  full_name: 'Max Verstappen',
+  team_name: 'Red Bull',
+  team_colour: '3671c6',
+  headshot_url: '',
+  points: 50,
+  position: 1,
+  wins: 2,
+  podiums: 2,
+  poles: 1,
+  form: [25, 25],
+  cumulative: [25, 50],
+  round_labels: ['R1', 'R2'],
+  rounds: [],
+  source: 'local',
+  enrichment: 'limited',
+}
+
+function renderPage(props: { driverNumber: number; year?: number }) {
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } })
+  const rootRoute = createRootRoute({
+    component: () => (
+      <QueryClientProvider client={queryClient}>
+        <DriverProfilePage driverNumber={props.driverNumber} year={props.year} />
+      </QueryClientProvider>
+    ),
+  })
+  const indexRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: '/',
+    component: () => null,
+  })
+  const router = createRouter({ routeTree: rootRoute.addChildren([indexRoute]) })
+  return render(<RouterProvider router={router} />)
+}
+
+describe('DriverProfilePage resilience', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockFetchSeasons.mockResolvedValue([2025])
+  })
+
+  it('leaves loading after a timeout error and offers retry', async () => {
+    mockFetchSummary.mockRejectedValue(
+      new ApiError('timeout', 'Request timed out', {
+        userMessage: 'This request took too long. Check your connection, then retry.',
+      }),
+    )
+
+    renderPage({ driverNumber: 1, year: 2025 })
+
+    await waitFor(() => {
+      expect(screen.getByTestId('driver-profile-error')).toBeInTheDocument()
+    })
+    expect(screen.queryByTestId('driver-profile-loading')).not.toBeInTheDocument()
+    expect(screen.getByRole('button', { name: 'Retry' })).toBeInTheDocument()
+    expect(screen.getByTestId('driver-profile-error')).toHaveTextContent(/took too long/i)
+  })
+
+  it('dedupes concurrent retries via a single refetch gate', async () => {
+    let calls = 0
+    mockFetchSummary.mockImplementation(async () => {
+      calls += 1
+      if (calls === 1) {
+        throw new ApiError('http', 'boom', { status: 500 })
+      }
+      return summary
+    })
+
+    renderPage({ driverNumber: 1, year: 2025 })
+    await waitFor(() => expect(screen.getByTestId('driver-profile-error')).toBeInTheDocument())
+
+    const retry = screen.getByRole('button', { name: 'Retry' })
+    fireEvent.click(retry)
+    fireEvent.click(retry)
+
+    await waitFor(() => expect(screen.getByTestId('driver-profile')).toBeInTheDocument())
+    expect(calls).toBe(2)
+    expect(screen.getByTestId('driver-profile-limited')).toBeInTheDocument()
+  })
+})

frontend/src/test/routeSearch.test.ts

@@ -0,0 +1,24 @@
+import { describe, it, expect } from 'vitest'
+import { parseRaceHubSearch, parseWeekendSearch, weekendFocusSearch } from '../lib/routeSearch'
+
+describe('routeSearch', () => {
+  it('parses positive weekend meeting/session keys and drops invalid values', () => {
+    expect(parseWeekendSearch({ meeting_key: '1229', session_key: '9000' })).toEqual({
+      meeting_key: 1229,
+      session_key: 9000,
+    })
+    expect(parseWeekendSearch({ meeting_key: '0', session_key: '-1', foo: 'bar' })).toEqual({})
+    expect(parseWeekendSearch({})).toEqual({})
+  })
+
+  it('parses race-hub session keys', () => {
+    expect(parseRaceHubSearch({ session_key: '9472' })).toEqual({ session_key: 9472 })
+    expect(parseRaceHubSearch({ session_key: 'nope' })).toEqual({})
+  })
+
+  it('builds Weekend focus search for Race Hub returns', () => {
+    expect(weekendFocusSearch(1229, 9000)).toEqual({ meeting_key: 1229, session_key: 9000 })
+    expect(weekendFocusSearch(null, 9000)).toEqual({ session_key: 9000 })
+    expect(weekendFocusSearch(1229, undefined)).toEqual({ meeting_key: 1229 })
+  })
+})

frontend/src/test/schedule.test.ts

@@ -5,10 +5,8 @@ import {
   focusMeetingKind,
   focusMeetingLabel,
   formatCountdown,
-  MAX_BROWSER_TIMEOUT,
   nextUpcomingMeeting,
   pickFocusMeeting,
-  refreshDeadlineDelay,
 } from '../lib/schedule'
 import type { Meeting, Session } from '../types'
 
@@ -80,15 +78,4 @@ describe('schedule helpers', () => {
     const target = new Date('2025-05-25T13:00:00+00:00')
     expect(formatCountdown(target, now)).toBe('0d 01h 00m 00s')
   })
-
-  it('uses the server refresh deadline without local timezone conversion', () => {
-    expect(refreshDeadlineDelay('2025-05-25T13:00:00Z', Date.parse('2025-05-25T12:59:30Z'))).toBe(30_000)
-    expect(refreshDeadlineDelay(undefined)).toBeNull()
-  })
-
-  it('caps a refresh deadline beyond the browser timer maximum', () => {
-    const now = Date.parse('2025-05-25T12:00:00Z')
-    const deadline = new Date(now + MAX_BROWSER_TIMEOUT + 1_000).toISOString()
-    expect(refreshDeadlineDelay(deadline, now)).toBe(MAX_BROWSER_TIMEOUT)
-  })
 })

frontend/src/test/sessionState.test.ts

@@ -0,0 +1,146 @@
+import { describe, it, expect } from 'vitest'
+import {
+  resolveSessionState,
+  sessionState,
+  sessionStateLabel,
+} from '../lib/sessionState'
+import type {
+  ContextAvailability,
+  ContextSession,
+  DatasetInfo,
+  Session,
+  WeekendContext,
+  WeekendSession,
+} from '../types'
+
+const NOW = new Date('2025-06-01T00:00:00Z')
+
+function mk(
+  overrides: Partial<Session>,
+  source: WeekendSession['source'],
+  datasets: Record<string, DatasetInfo> = {},
+): WeekendSession {
+  return {
+    session: {
+      session_key: 1,
+      session_name: 'Race',
+      session_type: 'Race',
+      meeting_key: 1,
+      date_start: '2025-05-25T13:00:00+00:00',
+      date_end: '2025-05-25T15:00:00+00:00',
+      gmt_offset: '00:00:00',
+      ...overrides,
+    },
+    source,
+    datasets,
+  }
+}
+
+const FULL: Record<string, DatasetInfo> = Object.fromEntries(
+  [
+    'meeting',
+    'session',
+    'drivers',
+    'results',
+    'starting_grid',
+    'stints',
+    'pit_stops',
+    'positions',
+    'race_control',
+    'weather',
+    'laps',
+  ].map((k) => [k, { status: 'available', source: 'local', count: 1 }]),
+)
+
+function availability(overrides: Partial<ContextAvailability> = {}): ContextAvailability {
+  return {
+    schedule: 'available',
+    live_transport: 'unknown',
+    live_session: 'inactive',
+    archive: 'unavailable',
+    local_analysis: 'complete',
+    freshness: 'fresh',
+    limitations: [],
+    ...overrides,
+  }
+}
+
+function contextSession(
+  session: Session,
+  avail: Partial<ContextAvailability> = {},
+): ContextSession {
+  return { session, availability: availability(avail) }
+}
+
+function context(overrides: Partial<WeekendContext> = {}): WeekendContext {
+  return {
+    temporal_state: 'post_weekend',
+    championship_round: 1,
+    total_championship_rounds: 1,
+    ...overrides,
+  }
+}
+
+describe('sessionState', () => {
+  it('marks a future session as upcoming', () => {
+    const s = mk({ date_start: '2099-05-25T13:00:00+00:00', date_end: '2099-05-25T15:00:00+00:00' }, 'none')
+    expect(sessionState(s, NOW)).toBe('upcoming')
+  })
+
+  it('does not mark Live from schedule alone', () => {
+    const start = new Date(NOW.getTime() - 60_000).toISOString()
+    const end = new Date(NOW.getTime() + 60_000).toISOString()
+    const s = mk({ date_start: start, date_end: end }, 'none')
+    expect(sessionState(s, NOW)).toBe('preparing')
+  })
+
+  it('marks Live only when Weekend Context active identity matches', () => {
+    const start = new Date(NOW.getTime() - 60_000).toISOString()
+    const end = new Date(NOW.getTime() + 60_000).toISOString()
+    const s = mk({ session_key: 42, date_start: start, date_end: end }, 'none')
+    const ctx = context({
+      temporal_state: 'session_live',
+      active_session: contextSession(s.session, { live_session: 'active' }),
+    })
+    expect(resolveSessionState({ weekendSession: s, context: ctx, now: NOW })).toBe('live')
+  })
+
+  it('marks a finished session with full local data as ready', () => {
+    const s = mk({}, 'local', FULL)
+    expect(sessionState(s, NOW)).toBe('ready')
+  })
+
+  it('marks a finished session with no data as preparing', () => {
+    const s = mk({}, 'none', {})
+    expect(sessionState(s, NOW)).toBe('preparing')
+  })
+
+  it('marks a finished session with partial data as partial', () => {
+    const s = mk({}, 'partial', { drivers: { status: 'available', source: 'local', count: 20 } })
+    expect(sessionState(s, NOW)).toBe('partial')
+  })
+
+  it('marks unavailable from context availability', () => {
+    const s = mk({ session_key: 7 }, 'none')
+    const ctx = context({
+      previous_completed_session: contextSession(s.session, {
+        local_analysis: 'unavailable',
+      }),
+    })
+    expect(resolveSessionState({ weekendSession: s, context: ctx, now: NOW })).toBe(
+      'unavailable',
+    )
+  })
+
+  it('marks a cancelled session as cancelled', () => {
+    const s = mk({}, 'cancelled')
+    expect(sessionState(s, NOW)).toBe('cancelled')
+  })
+
+  it('uses user language labels rather than coverage counts', () => {
+    expect(sessionStateLabel('ready')).toBe('Ready')
+    expect(sessionStateLabel('upcoming')).toBe('Upcoming')
+    expect(sessionStateLabel('partial')).toBe('Partial')
+    expect(sessionStateLabel('unavailable')).toBe('Unavailable')
+  })
+})

frontend/src/test/weekendContext.test.ts

@@ -0,0 +1,223 @@
+import { describe, it, expect } from 'vitest'
+import {
+  analysisSessionKey,
+  briefingItems,
+  championshipImpact,
+  hasLocalAnalysis,
+  meetingIdentity,
+  podiumFromResults,
+  resolveViewState,
+} from '../lib/weekendContext'
+import type {
+  ChampionshipHub,
+  ContextAvailability,
+  ContextSession,
+  EnrichedResult,
+  Meeting,
+  NewsItem,
+  Session,
+  TemporalState,
+  WeekendContext,
+} from '../types'
+
+function availability(overrides: Partial<ContextAvailability> = {}): ContextAvailability {
+  return {
+    schedule: 'available',
+    live_transport: 'unknown',
+    live_session: 'inactive',
+    archive: 'unavailable',
+    local_analysis: 'complete',
+    freshness: 'fresh',
+    limitations: [],
+    ...overrides,
+  }
+}
+
+function meeting(overrides: Partial<Meeting> = {}): Meeting {
+  return {
+    meeting_key: 1,
+    meeting_name: 'British Grand Prix',
+    meeting_official_name: 'FORMULA 1 BRITISH GRAND PRIX',
+    location: 'Silverstone',
+    country_name: 'United Kingdom',
+    country_code: 'GBR',
+    country_flag: '',
+    circuit_key: 2,
+    circuit_short_name: 'Silverstone',
+    date_start: '2026-07-03T09:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    year: 2026,
+    ...overrides,
+  }
+}
+
+function session(overrides: Partial<Session> = {}): Session {
+  return {
+    session_key: 11,
+    session_name: 'Race',
+    session_type: 'Race',
+    meeting_key: 1,
+    date_start: '2026-07-05T14:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    gmt_offset: '',
+    ...overrides,
+  }
+}
+
+function ctxSession(overrides: Partial<ContextSession> = {}): ContextSession {
+  return {
+    session: session(),
+    meeting: meeting(),
+    availability: availability(),
+    ...overrides,
+  }
+}
+
+function context(overrides: Partial<WeekendContext> = {}): WeekendContext {
+  return {
+    season: 2026,
+    temporal_state: 'between_weekends',
+    championship_round: 1,
+    total_championship_rounds: 24,
+    ...overrides,
+  }
+}
+
+describe('resolveViewState', () => {
+  const cases: Array<[TemporalState, string]> = [
+    ['no_season', 'no_season'],
+    ['between_weekends', 'between_weekends'],
+    ['pre_session', 'pre_session'],
+    ['session_live', 'session_live'],
+    ['session_settling', 'session_settling'],
+    ['between_sessions', 'between_sessions'],
+    ['post_weekend', 'post_weekend'],
+    ['season_complete', 'season_complete'],
+  ]
+
+  it.each(cases)('maps canonical temporal_state %s to view %s', (temporal, expected) => {
+    expect(resolveViewState(context({ temporal_state: temporal }))).toBe(expected)
+  })
+
+  it('treats an unknown/absent temporal_state as no_season rather than inventing a state', () => {
+    expect(resolveViewState(context({ temporal_state: 'garbage' as TemporalState }))).toBe('no_season')
+  })
+})
+
+describe('analysisSessionKey', () => {
+  it('prefers the default analysis session', () => {
+    const ctx = context({
+      default_analysis_session: ctxSession({ session: session({ session_key: 32 }) }),
+      previous_completed_session: ctxSession({ session: session({ session_key: 11 }) }),
+    })
+    expect(analysisSessionKey(ctx)).toBe(32)
+  })
+
+  it('falls back to the previous completed session', () => {
+    const ctx = context({
+      previous_completed_session: ctxSession({ session: session({ session_key: 11 }) }),
+    })
+    expect(analysisSessionKey(ctx)).toBe(11)
+  })
+
+  it('returns undefined when there is no analysable session', () => {
+    expect(analysisSessionKey(context())).toBeUndefined()
+  })
+
+  it('returns undefined for a zero/synthetic session key', () => {
+    const ctx = context({
+      previous_completed_session: ctxSession({ session: session({ session_key: 0 }) }),
+    })
+    expect(analysisSessionKey(ctx)).toBeUndefined()
+  })
+})
+
+describe('hasLocalAnalysis', () => {
+  it('is true for complete or partial local analysis', () => {
+    expect(hasLocalAnalysis(ctxSession({ availability: availability({ local_analysis: 'complete' }) }))).toBe(true)
+    expect(hasLocalAnalysis(ctxSession({ availability: availability({ local_analysis: 'partial' }) }))).toBe(true)
+  })
+
+  it('is false for pending/not_applicable/absent', () => {
+    expect(hasLocalAnalysis(ctxSession({ availability: availability({ local_analysis: 'pending' }) }))).toBe(false)
+    expect(hasLocalAnalysis(ctxSession({ availability: availability({ local_analysis: 'not_applicable' }) }))).toBe(false)
+    expect(hasLocalAnalysis(undefined)).toBe(false)
+  })
+})
+
+describe('meetingIdentity', () => {
+  it('derives a short name and tolerates partial fields', () => {
+    const id = meetingIdentity(meeting({ meeting_name: 'Monaco Grand Prix', circuit_short_name: '', location: 'Monaco' }))
+    expect(id?.short_name).toBe('Monaco')
+    expect(id?.circuit_short_name).toBe('Monaco')
+  })
+
+  it('returns undefined for an absent meeting', () => {
+    expect(meetingIdentity(undefined)).toBeUndefined()
+  })
+
+  it('drops empty date strings', () => {
+    const id = meetingIdentity(meeting({ date_start: '', date_end: '' }))
+    expect(id?.date_start).toBeUndefined()
+    expect(id?.date_end).toBeUndefined()
+  })
+})
+
+describe('championshipImpact', () => {
+  const hub: ChampionshipHub = {
+    season: 2026,
+    round: 2,
+    total_rounds: 24,
+    rounds_left: 22,
+    last_race: 'British GP',
+    round_labels: ['R1', 'R2'],
+    drivers: [
+      { driver_number: 1, name_acronym: 'VER', full_name: 'Max', team_name: 'RB', team_colour: '3671c6', points: 50, position: 1, wins: 2, podiums: 2, poles: 1, form: [], cumulative: [25, 50], teammate_wins: 0, teammate_losses: 0, round_positions: [] },
+      { driver_number: 4, name_acronym: 'NOR', full_name: 'Lando', team_name: 'McL', team_colour: 'ff8000', points: 40, position: 2, wins: 1, podiums: 2, poles: 0, form: [], cumulative: [18, 40], teammate_wins: 0, teammate_losses: 0, round_positions: [] },
+    ],
+    teams: [],
+  }
+
+  it('maps top-3 movers with deltas and a note', () => {
+    const impact = championshipImpact(hub)
+    expect(impact?.leaders).toHaveLength(2)
+    expect(impact?.leaders[0].delta).toBe(25)
+    expect(impact?.note).toContain('British GP')
+  })
+
+  it('returns undefined for an empty hub', () => {
+    expect(championshipImpact(undefined)).toBeUndefined()
+    expect(championshipImpact({ ...hub, drivers: [] })).toBeUndefined()
+  })
+})
+
+describe('briefingItems', () => {
+  it('caps at three items and maps fields', () => {
+    const news: NewsItem[] = Array.from({ length: 5 }, (_, i) => ({
+      source: 'src',
+      title: `Item ${i}`,
+      url: `https://x/${i}`,
+      fetched_at: '2026-07-06T00:00:00Z',
+      category: 'news',
+      og_image_url: 'img',
+    }))
+    const items = briefingItems(news)
+    expect(items).toHaveLength(3)
+    expect(items[0]).toMatchObject({ title: 'Item 0', image_url: 'img' })
+  })
+})
+
+describe('podiumFromResults', () => {
+  it('sorts by position, caps at three, and formats gaps', () => {
+    const results: EnrichedResult[] = [
+      { driver_number: 44, position: 2, name_acronym: 'HAM', full_name: 'Lewis', team_name: 'Ferrari', team_colour: 'e8002d', dnf: false, dns: false, dsq: false, duration: null, gap_to_leader: 5.123 } as EnrichedResult,
+      { driver_number: 1, position: 1, name_acronym: 'VER', full_name: 'Max', team_name: 'RB', team_colour: '3671c6', dnf: false, dns: false, dsq: false, duration: 5400, gap_to_leader: null } as EnrichedResult,
+      { driver_number: 16, position: 3, name_acronym: 'LEC', full_name: 'Charles', team_name: 'Ferrari', team_colour: 'e8002d', dnf: false, dns: false, dsq: false, duration: null, gap_to_leader: '+10.5' } as EnrichedResult,
+      { driver_number: 55, position: 4, name_acronym: 'SAI', full_name: 'Carlos', team_name: 'W', team_colour: 'fff', dnf: false, dns: false, dsq: false, duration: null, gap_to_leader: 20 } as EnrichedResult,
+    ]
+    const podium = podiumFromResults(results)
+    expect(podium.map((p) => p.name_acronym)).toEqual(['VER', 'HAM', 'LEC'])
+    expect(podium[1].gap).toBe('+5.123')
+    expect(podium[2].gap).toBe('+10.5')
+  })
+})

frontend/src/types.ts

@@ -217,41 +217,6 @@ export interface Weekend {
   default_session_key?: number
 }
 
-export interface ContextAvailability {
-  source: string
-  schedule: string
-  live_transport: string
-  live_session: string
-  archive: string
-  local_analysis: string
-  freshness: string
-  observed_at?: string
-  limitations: string[]
-}
-
-export interface ContextSession {
-  session: Session
-  meeting?: Meeting
-  availability: ContextAvailability
-}
-
-export interface WeekendContext {
-  season?: number
-  temporal_state: string
-  previous_meeting?: Meeting
-  focus_meeting?: Meeting
-  next_meeting?: Meeting
-  previous_completed_session?: ContextSession
-  active_session?: ContextSession
-  next_session?: ContextSession
-  default_analysis_session?: ContextSession
-  race_hub_default_session?: ContextSession
-  race_hub_pre_session: boolean
-  race_hub_refresh_at?: string
-  championship_round: number
-  total_championship_rounds: number
-}
-
 export interface LiveStateResponse {
   is_live: boolean
   data: LiveStreamData | null
@@ -481,6 +446,113 @@ export interface DriverSummary {
   cumulative: number[]
   round_labels: string[]
   rounds: DriverSummaryRound[]
+  /** Data origin: local domain DB or OpenF1 fallback. */
+  source?: 'local' | 'openf1'
+  /** Optional remote enrichment status — limited means profile still renders. */
+  enrichment?: 'full' | 'limited' | 'none'
+}
+
+// ── Weekend Context ──
+// Canonical local-first contract for the adaptive Weekend home, served verbatim
+// by /api/v1/weekend-context (backend story #72, internal/query/context.go).
+// The frontend consumes this shape as the single source of truth; view-model
+// derivation lives in lib/weekendContext.ts.
+
+// TemporalState mirrors query.TemporalState exactly (the JSON `temporal_state`).
+export type TemporalState =
+  | 'no_season'
+  | 'between_weekends'
+  | 'pre_session'
+  | 'session_live'
+  | 'session_settling'
+  | 'between_sessions'
+  | 'post_weekend'
+  | 'season_complete'
+
+// ContextAvailability mirrors query.ContextAvailability. Every field is present
+// in a canonical payload except the optional `observed_at`.
+export interface ContextAvailability {
+  /** Domain / FIA provenance: local | mixed | fia (additive; may be absent on older payloads). */
+  source?: string
+  schedule: string
+  live_transport: string
+  live_session: string
+  archive: string
+  local_analysis: string
+  freshness: string
+  observed_at?: string
+  limitations: string[]
+}
+
+// ContextSession mirrors query.ContextSession: a session identity coupled with
+// its meeting and structured availability contract.
+export interface ContextSession {
+  session: Session
+  meeting?: Meeting
+  availability: ContextAvailability
+}
+
+// WeekendContext mirrors query.WeekendContext (the canonical endpoint body).
+export interface WeekendContext {
+  season?: number
+  temporal_state: TemporalState
+  previous_meeting?: Meeting
+  focus_meeting?: Meeting
+  next_meeting?: Meeting
+  previous_completed_session?: ContextSession
+  active_session?: ContextSession
+  next_session?: ContextSession
+  default_analysis_session?: ContextSession
+  championship_round: number
+  total_championship_rounds: number
+}
+
+// ── Weekend view model (client-only) ──
+// The rendered Weekend home layers a small set of non-canonical UI states
+// (loading/error) plus supplementary data (championship movers, briefing) on top
+// of the canonical context. None of these are part of the #72 contract.
+export type WeekendViewState =
+  | 'loading'
+  | 'error'
+  | 'no_season'
+  | 'between_weekends'
+  | 'pre_session'
+  | 'session_live'
+  | 'session_settling'
+  | 'between_sessions'
+  | 'post_weekend'
+  | 'season_complete'
+
+export interface WeekendChampionshipMover {
+  position: number
+  driver_number: number
+  name_acronym: string
+  team_colour: string
+  points: number
+  delta?: number
+}
+
+export interface WeekendChampionshipImpact {
+  leaders: WeekendChampionshipMover[]
+  note?: string
+}
+
+export interface WeekendBriefingItem {
+  category?: string
+  title: string
+  url: string
+  source: string
+  published_at?: string
+  image_url?: string
+}
+
+export interface WeekendPodiumEntry {
+  position: number
+  driver_number: number
+  name_acronym: string
+  team_name: string
+  team_colour: string
+  gap: string
 }
 
 export interface NewsItem {

internal/live/parser_test.go

@@ -307,28 +307,6 @@ func TestSessionStatusIsActive(t *testing.T) {
 	}
 }
 
-func TestSessionStatusIsTerminal(t *testing.T) {
-	tests := []struct {
-		status string
-		want   bool
-	}{
-		{"Finished", true},
-		{"Finalised", true},
-		{"Finalized", true},
-		{"Ends", true},
-		{"Aborted", true},
-		{"Started", false},
-		{"Resumed", false},
-		{"Inactive", false},
-		{"", false},
-	}
-	for _, tt := range tests {
-		if got := live.SessionStatusIsTerminal(tt.status); got != tt.want {
-			t.Errorf("SessionStatusIsTerminal(%q) = %v, want %v", tt.status, got, tt.want)
-		}
-	}
-}
-
 func TestProcessTopicRaceControlMessages(t *testing.T) {
 	state := live.NewState()
 	data := json.RawMessage(`{
@@ -472,62 +450,6 @@ func TestProcessTopicTimingAppData(t *testing.T) {
 	}
 }
 
-// The feed sends stints as sparse deltas keyed by stint index. Replacing the
-// slice on each delta collapsed pit history to one entry and pinned tyre age
-// near zero — observed live at lap 49 of a 70-lap race, where every driver
-// reported a single stint of age 0 despite having pitted.
-func TestProcessTopicTimingAppDataMergesSparseStintDeltas(t *testing.T) {
-	state := live.NewState()
-	state.ProcessTopic("TimingAppData", json.RawMessage(`{
-		"Lines": {"4": {"Stints": {"0": {"Compound": "MEDIUM", "New": "true", "TotalLaps": 0}}}}
-	}`))
-	// Stint 0 runs to 18 laps, then the driver pits onto a new hard.
-	state.ProcessTopic("TimingAppData", json.RawMessage(`{
-		"Lines": {"4": {"Stints": {"0": {"TotalLaps": 18}}}}
-	}`))
-	state.ProcessTopic("TimingAppData", json.RawMessage(`{
-		"Lines": {"4": {"Stints": {"1": {"Compound": "HARD", "New": "true", "TotalLaps": 0}}}}
-	}`))
-	state.ProcessTopic("TimingAppData", json.RawMessage(`{
-		"Lines": {"4": {"Stints": {"1": {"TotalLaps": 12}}}}
-	}`))
-
-	snap := state.Snapshot()
-	stints := snap.Stints["4"]
-	if len(stints) != 2 {
-		t.Fatalf("expected 2 stints after a pit stop, got %d: %+v", len(stints), stints)
-	}
-	if stints[0].Compound != "MEDIUM" || stints[0].Laps != 18 {
-		t.Errorf("first stint lost across deltas: %+v", stints[0])
-	}
-	if stints[1].Compound != "HARD" || stints[1].Laps != 12 {
-		t.Errorf("second stint = %+v", stints[1])
-	}
-	if tyre := snap.Tyres["4"]; tyre.Compound != "HARD" || tyre.Age != 12 {
-		t.Errorf("current tyre should track the latest stint, got %+v", tyre)
-	}
-}
-
-func TestProcessTopicTimingAppDataIgnoresNonNumericStintKeys(t *testing.T) {
-	state := live.NewState()
-	state.ProcessTopic("TimingAppData", json.RawMessage(`{
-		"Lines": {"4": {"Stints": {"0": {"Compound": "SOFT", "New": "true", "TotalLaps": 9}}}}
-	}`))
-	// "_kf" is a feed key-frame marker, not a stint index. Parsing it as 0
-	// would overwrite the real first stint.
-	state.ProcessTopic("TimingAppData", json.RawMessage(`{
-		"Lines": {"4": {"Stints": {"_kf": {"Compound": "HARD", "TotalLaps": 99}}}}
-	}`))
-
-	stints := state.Snapshot().Stints["4"]
-	if len(stints) != 1 {
-		t.Fatalf("expected 1 stint, got %d: %+v", len(stints), stints)
-	}
-	if stints[0].Compound != "SOFT" || stints[0].Laps != 9 {
-		t.Errorf("key-frame marker corrupted stint 0: %+v", stints[0])
-	}
-}
-
 func TestProcessTopicTimingStats(t *testing.T) {
 	state := live.NewState()
 	state.Drivers["55"] = live.LiveDriverData{RacingNumber: "55"}

internal/live/state.go

@@ -10,7 +10,6 @@ import (
 	"io"
 	"log"
 	"sort"
-	"strconv"
 	"strings"
 	"time"
 )
@@ -405,42 +404,22 @@ func (s *State) ProcessTopic(topic string, data json.RawMessage) bool {
 					Stints json.RawMessage `json:"Stints"`
 				}
 				if json.Unmarshal(lineRaw, &line) == nil && line.Stints != nil {
-					// The feed sends stints as sparse deltas keyed by stint index:
+					var driverStints []LiveStintData
-					// a mid-stint update is just {"1": {"TotalLaps": 14}}. Merge
-					// each entry into the stint it addresses. Replacing the slice
-					// wholesale discarded every earlier stint, so pit history
-					// collapsed to one entry and tyre age stuck near zero for the
-					// whole race.
-					driverStints := append([]LiveStintData(nil), s.Stints[num]...)
-					changed := false
 					for _, sRaw := range indexedRawValues(line.Stints) {
 						var st struct {
-							Compound  *string `json:"Compound"`
+							Compound  string `json:"Compound"`
-							New       *string `json:"New"`
+							New       string `json:"New"`
-							TotalLaps *int    `json:"TotalLaps"`
+							TotalLaps int    `json:"TotalLaps"`
 						}
-						if json.Unmarshal(sRaw.Raw, &st) != nil {
+						if json.Unmarshal(sRaw.Raw, &st) == nil && st.Compound != "" {
-							continue
+							driverStints = append(driverStints, LiveStintData{
+								Compound: st.Compound,
+								New:      st.New == "true" || st.New == "True",
+								Laps:     st.TotalLaps,
+							})
 						}
-						if st.Compound == nil && st.New == nil && st.TotalLaps == nil {
-							continue
 					}
-						for len(driverStints) <= sRaw.Index {
+					if len(driverStints) > 0 {
-							driverStints = append(driverStints, LiveStintData{})
-						}
-						entry := &driverStints[sRaw.Index]
-						if st.Compound != nil && *st.Compound != "" {
-							entry.Compound = *st.Compound
-						}
-						if st.New != nil {
-							entry.New = *st.New == "true" || *st.New == "True"
-						}
-						if st.TotalLaps != nil {
-							entry.Laps = *st.TotalLaps
-						}
-						changed = true
-					}
-					if changed {
 						s.Stints[num] = driverStints
 						lastStint := driverStints[len(driverStints)-1]
 						t := s.Tyres[num]
@@ -895,13 +874,8 @@ func indexedRawValues(raw json.RawMessage) []indexedRaw {
 	if err := json.Unmarshal(raw, &obj); err == nil {
 		values := make([]indexedRaw, 0, len(obj))
 		for k, v := range obj {
-			// Keys are array indices in the feed's delta form. Non-numeric keys
+			i := 0
-			// are feed metadata — "_kf" (key frame) is the common one — and must
+			fmt.Sscanf(k, "%d", &i)
-			// not be folded in as index 0, which would clobber the first entry.
-			i, err := strconv.Atoi(k)
-			if err != nil || i < 0 {
-				continue
-			}
 			values = append(values, indexedRaw{Index: i, Raw: v})
 		}
 		sort.Slice(values, func(i, j int) bool {

internal/live/types.go

@@ -186,19 +186,6 @@ func SessionStatusIsActive(status string) bool {
 	}
 }
 
-// SessionStatusIsTerminal reports whether a raw F1 live timing SessionStatus
-// value represents a session that has ended and will not resume. A temporarily
-// inactive session (e.g. a red-flag pause reported as "Inactive") is neither
-// active nor terminal.
-func SessionStatusIsTerminal(status string) bool {
-	switch normalizeSessionStatus(status) {
-	case "finished", "finalised", "finalized", "ends", "aborted":
-		return true
-	default:
-		return false
-	}
-}
-
 func normalizeSessionStatus(status string) string {
 	out := make([]rune, 0, len(status))
 	for _, r := range status {

internal/query/context.go

@@ -24,7 +24,6 @@ const (
 
 	preSessionWindow  = 48 * time.Hour
 	postWeekendWindow = 48 * time.Hour
-	raceHubPendingPollInterval = 15 * time.Second
 )
 
 // LiveEvidence is the small, transport-independent subset of FIA state needed
@@ -70,9 +69,6 @@ type WeekendContext struct {
 	ActiveSession            *ContextSession `json:"active_session,omitempty"`
 	NextSession              *ContextSession `json:"next_session,omitempty"`
 	DefaultAnalysisSession   *ContextSession `json:"default_analysis_session,omitempty"`
-	RaceHubDefaultSession    *ContextSession `json:"race_hub_default_session,omitempty"`
-	RaceHubPreSession        bool            `json:"race_hub_pre_session"`
-	RaceHubRefreshAt         string          `json:"race_hub_refresh_at,omitempty"`
 	ChampionshipRound        int             `json:"championship_round"`
 	TotalChampionshipRounds  int             `json:"total_championship_rounds"`
 }
@@ -154,7 +150,7 @@ func (s *Service) ResolveWeekendContext(evidence LiveEvidence) (WeekendContext,
 		}
 	}
 
-	var previous, next, defaultAnalysis, pending *contextCandidate
+	var previous, next, defaultAnalysis *contextCandidate
 	for i := range candidates {
 		c := &candidates[i]
 		isActive := active != nil && active.session.SessionKey != 0 && c.session.SessionKey == active.session.SessionKey
@@ -168,10 +164,6 @@ func (s *Service) ResolveWeekendContext(evidence LiveEvidence) (WeekendContext,
 		if !isActive && !c.start.IsZero() && !c.start.Before(now) && (next == nil || c.start.Before(next.start)) {
 			next = c
 		}
-		if !isActive && !c.complete && !c.start.IsZero() && !c.start.After(now) &&
-			(c.end.IsZero() || now.Before(c.end)) && (pending == nil || c.start.After(pending.start)) {
-			pending = c
-		}
 	}
 
 	if previous != nil {
@@ -196,40 +188,9 @@ func (s *Service) ResolveWeekendContext(evidence LiveEvidence) (WeekendContext,
 	if out.FocusMeeting != nil {
 		out.ChampionshipRound = championshipRound(champMeetings, int(out.FocusMeeting.MeetingKey))
 	}
-	applyRaceHubDefault(&out, active, defaultAnalysis, next, pending, now)
 	return out, nil
 }
 
-// applyRaceHubDefault is deliberately distinct from TemporalPreSession. Other
-// weekend surfaces begin preparation 48 hours ahead; Race Hub remains an
-// analysis destination until the one-hour handoff before the next session.
-func applyRaceHubDefault(out *WeekendContext, active, analysis, next, pending *contextCandidate, now time.Time) {
-	if active != nil {
-		out.RaceHubDefaultSession = out.ActiveSession
-		return
-	}
-	if next != nil {
-		handoff := next.start.Add(-time.Hour)
-		if now.Before(handoff) {
-			out.RaceHubRefreshAt = handoff.Format(time.RFC3339)
-		} else if now.Before(next.start) {
-			out.RaceHubDefaultSession = out.NextSession
-			out.RaceHubPreSession = true
-			out.RaceHubRefreshAt = next.start.Format(time.RFC3339)
-			return
-		}
-	}
-	if pending != nil {
-		out.RaceHubDefaultSession = sessionRef(*pending, LiveEvidence{}, now)
-		out.RaceHubPreSession = true
-		out.RaceHubRefreshAt = now.Add(raceHubPendingPollInterval).Format(time.RFC3339)
-		return
-	}
-	if analysis != nil {
-		out.RaceHubDefaultSession = out.DefaultAnalysisSession
-	}
-}
-
 func currentLocalSeason(years []int, current int) int {
 	for _, year := range years {
 		if year == current {

internal/query/context_test.go

@@ -223,38 +223,6 @@ func TestResolveWeekendContextNeverUsesFutureAnalysis(t *testing.T) {
 	}
 }
 
-// Regression for the v0.4.0 release blocker (#90). Production held a run
-// British race (11326) and an unrun Belgian race (11334) two weekends apart.
-// Analysis must resolve to the race that actually happened, even when the
-// later meeting carries preloaded rows.
-func TestResolveWeekendContextPrefersRunRaceOverLaterUnrunRace(t *testing.T) {
-	now, _ := time.Parse(time.RFC3339, "2026-07-13T12:00:00Z")
-	svc := contextService(t, now)
-	addContextMeeting(t, svc, 1289, "British Grand Prix", "2026-07-03T11:30:00Z", "2026-07-05T16:00:00Z", false)
-	addContextSession(t, svc, 11326, 1289, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
-	completeContextSession(t, svc, 11326, 1289)
-	addContextMeeting(t, svc, 1290, "Belgian Grand Prix", "2026-07-17T11:30:00Z", "2026-07-19T15:00:00Z", false)
-	addContextSession(t, svc, 11334, 1290, "Race", "2026-07-19T13:00:00Z", "2026-07-19T15:00:00Z", false)
-	completeContextSession(t, svc, 11334, 1290)
-
-	got, err := svc.ResolveWeekendContext(LiveEvidence{})
-	if err != nil {
-		t.Fatal(err)
-	}
-	if got.DefaultAnalysisSession == nil {
-		t.Fatal("no analysis session resolved")
-	}
-	if key := got.DefaultAnalysisSession.Session.SessionKey; key != 11326 {
-		t.Fatalf("analysis session = %d, want 11326 (British); 11334 is the unrun Belgian race", key)
-	}
-	if got.PreviousCompletedSession == nil || got.PreviousCompletedSession.Session.SessionKey != 11326 {
-		t.Fatalf("previous completed = %+v, want 11326", got.PreviousCompletedSession)
-	}
-	if got.NextSession == nil || got.NextSession.Session.SessionKey != 11334 {
-		t.Fatalf("next session = %+v, want 11334", got.NextSession)
-	}
-}
-
 func TestResolveWeekendContextSprintWeekendHandoff(t *testing.T) {
 	now, _ := time.Parse(time.RFC3339, "2026-07-04T12:00:00Z")
 	svc := contextService(t, now)
@@ -399,88 +367,3 @@ func TestResolveWeekendContextMissingScheduleDoesNotClaimSeasonComplete(t *testi
 		t.Fatalf("total rounds = %d, want scheduled round retained", got.TotalChampionshipRounds)
 	}
 }
-
-func TestResolveWeekendContextRaceHubDefault(t *testing.T) {
-	seed := func(t *testing.T, svc *Service) {
-		addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "2026-07-05T16:00:00Z", false)
-		addContextSession(t, svc, 11, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
-		completeContextSession(t, svc, 11, 1)
-		addContextMeeting(t, svc, 2, "Belgian Grand Prix", "2026-07-17T09:00:00Z", "2026-07-19T16:00:00Z", false)
-		addContextSession(t, svc, 21, 2, "Practice 1", "2026-07-17T09:00:00Z", "2026-07-17T10:00:00Z", false)
-	}
-
-	t.Run("keeps completed analysis before handoff", func(t *testing.T) {
-		now, _ := time.Parse(time.RFC3339, "2026-07-16T07:59:59Z")
-		svc := contextService(t, now)
-		seed(t, svc)
-		got, err := svc.ResolveWeekendContext(LiveEvidence{})
-		if err != nil {
-			t.Fatal(err)
-		}
-		if got.RaceHubDefaultSession == nil || got.RaceHubDefaultSession.Session.SessionKey != 11 || got.RaceHubPreSession {
-			t.Fatalf("race hub default = %+v, pre-session = %t", got.RaceHubDefaultSession, got.RaceHubPreSession)
-		}
-		if got.RaceHubRefreshAt != "2026-07-17T08:00:00Z" {
-			t.Fatalf("refresh = %q", got.RaceHubRefreshAt)
-		}
-	})
-
-	t.Run("hands off exactly one hour before first session", func(t *testing.T) {
-		now, _ := time.Parse(time.RFC3339, "2026-07-17T08:00:00Z")
-		svc := contextService(t, now)
-		seed(t, svc)
-		got, err := svc.ResolveWeekendContext(LiveEvidence{})
-		if err != nil {
-			t.Fatal(err)
-		}
-		if got.RaceHubDefaultSession == nil || got.RaceHubDefaultSession.Session.SessionKey != 21 || !got.RaceHubPreSession {
-			t.Fatalf("race hub handoff = %+v, pre-session = %t", got.RaceHubDefaultSession, got.RaceHubPreSession)
-		}
-		if got.RaceHubRefreshAt != "2026-07-17T09:00:00Z" {
-			t.Fatalf("refresh = %q", got.RaceHubRefreshAt)
-		}
-	})
-
-	t.Run("keeps the scheduled session pending after its start without live evidence", func(t *testing.T) {
-		now, _ := time.Parse(time.RFC3339, "2026-07-17T09:00:00Z")
-		svc := contextService(t, now)
-		seed(t, svc)
-		got, err := svc.ResolveWeekendContext(LiveEvidence{})
-		if err != nil {
-			t.Fatal(err)
-		}
-		if got.RaceHubDefaultSession == nil || got.RaceHubDefaultSession.Session.SessionKey != 21 || !got.RaceHubPreSession {
-			t.Fatalf("scheduled race hub default = %+v, pre-session = %t", got.RaceHubDefaultSession, got.RaceHubPreSession)
-		}
-		if got.RaceHubRefreshAt != "2026-07-17T09:00:15Z" {
-			t.Fatalf("refresh = %q", got.RaceHubRefreshAt)
-		}
-	})
-
-	t.Run("active live session wins", func(t *testing.T) {
-		now, _ := time.Parse(time.RFC3339, "2026-07-17T08:30:00Z")
-		svc := contextService(t, now)
-		seed(t, svc)
-		got, err := svc.ResolveWeekendContext(LiveEvidence{Active: true, MeetingName: "Belgian Grand Prix", SessionName: "Practice 1", SessionType: "Practice 1"})
-		if err != nil {
-			t.Fatal(err)
-		}
-		if got.RaceHubDefaultSession == nil || got.RaceHubDefaultSession.Session.SessionKey != 21 || got.RaceHubPreSession {
-			t.Fatalf("live default = %+v, pre-session = %t", got.RaceHubDefaultSession, got.RaceHubPreSession)
-		}
-	})
-
-	t.Run("does not select an empty future session before handoff", func(t *testing.T) {
-		now, _ := time.Parse(time.RFC3339, "2026-07-16T12:00:00Z")
-		svc := contextService(t, now)
-		addContextMeeting(t, svc, 2, "Belgian Grand Prix", "2026-07-17T09:00:00Z", "2026-07-19T16:00:00Z", false)
-		addContextSession(t, svc, 21, 2, "Practice 1", "2026-07-17T09:00:00Z", "2026-07-17T10:00:00Z", false)
-		got, err := svc.ResolveWeekendContext(LiveEvidence{})
-		if err != nil {
-			t.Fatal(err)
-		}
-		if got.RaceHubDefaultSession != nil || got.RaceHubPreSession {
-			t.Fatalf("unexpected empty future default: %+v", got)
-		}
-	})
-}

internal/query/navigation.go

@@ -19,6 +19,8 @@ type WeekendSession struct {
 }
 
 // Weekend is the local-first read model for one race weekend.
+// Fan-facing default analysis resolution lives on /api/v1/weekend-context
+// (DefaultAnalysisSession); this payload only supplies meeting rail + coverage.
 type Weekend struct {
 	Source            string           `json:"source"`
 	MeetingKey        int              `json:"meeting_key"`

internal/web/context_test.go

@@ -167,30 +167,3 @@ func TestTerminalSessionStatus(t *testing.T) {
 		}
 	}
 }
-
-func TestWeekendContextHandlerSerializesRaceHubRefreshDeadline(t *testing.T) {
-	st := openContextStore(t)
-	seedContextHandler(t, st)
-	if err := st.UpsertSessionResult(store.SessionResult{SessionKey: 11, MeetingKey: 1, DriverNumber: 1, Position: 1}); err != nil {
-		t.Fatal(err)
-	}
-	if err := st.UpsertMeeting(store.Meeting{MeetingKey: 2, MeetingName: "Belgian Grand Prix", CircuitShortName: "Spa", Year: 2026, DateStart: "2026-07-17T09:00:00Z", DateEnd: "2026-07-19T16:00:00Z"}); err != nil {
-		t.Fatal(err)
-	}
-	if err := st.UpsertSession(store.Session{SessionKey: 21, MeetingKey: 2, SessionName: "Practice 1", SessionType: "Practice", DateStart: "2026-07-17T09:00:00Z", DateEnd: "2026-07-17T10:00:00Z"}); err != nil {
-		t.Fatal(err)
-	}
-	s := NewServer(nil, 0, st)
-	s.query = query.NewServiceWithClock(st, func() time.Time {
-		return time.Date(2026, 7, 17, 8, 0, 0, 0, time.UTC)
-	})
-	rr := httptest.NewRecorder()
-	s.handleWeekendContext(rr, httptest.NewRequest(http.MethodGet, "/api/v1/weekend-context", nil))
-	var got query.WeekendContext
-	if err := json.Unmarshal(rr.Body.Bytes(), &got); err != nil {
-		t.Fatal(err)
-	}
-	if !got.RaceHubPreSession || got.RaceHubRefreshAt != "2026-07-17T09:00:00Z" || got.RaceHubDefaultSession == nil || got.RaceHubDefaultSession.Session.SessionKey != 21 {
-		t.Fatalf("race hub context = %+v", got)
-	}
-}

internal/web/live.go

@@ -134,7 +134,7 @@ func (h *SSEHub) applySnapshot(data live.LiveStreamData, now time.Time) liveStat
 	h.mu.Lock()
 	defer h.mu.Unlock()
 
-	if snapshotIsLive(data) {
+	if live.SessionStatusIsActive(data.SessionStatus) {
 		h.isLive = true
 		h.activeSnapshot = &data
 		if data.PositionUpdated && len(data.Positions) > 0 {
@@ -208,40 +208,6 @@ func (h *SSEHub) stateLocked() liveStatePayload {
 	return payload
 }
 
-// snapshotIsLive reports whether the current live-timing snapshot represents an
-// ongoing session that should be surfaced as live.
-//
-// An actively running session (Started/Resumed) is always live. A non-terminal
-// but temporarily inactive session — e.g. a red-flag pause where SessionStatus
-// drops to "Inactive" while the session is still in progress — is also live when
-// the snapshot itself carries live evidence: a session clock with time remaining
-// plus session metadata. This keeps the paused track state visible instead of
-// collapsing to the inactive empty state.
-//
-// Terminal sessions (Finished/Finalised/Ends/Aborted) are never live. A generic
-// inactive/no-session stale snapshot is not live either: the predicate keys off
-// the current snapshot's clock and session, so old metadata alone is not enough.
-func snapshotIsLive(data live.LiveStreamData) bool {
-	if live.SessionStatusIsActive(data.SessionStatus) {
-		return true
-	}
-	if live.SessionStatusIsTerminal(data.SessionStatus) {
-		return false
-	}
-	return clockHasTimeRemaining(data.Clock) && data.Session.SessionName != ""
-}
-
-// clockHasTimeRemaining reports whether an "HH:MM:SS" session clock has any time
-// left. Empty or all-zero clocks (a spent or absent session) return false.
-func clockHasTimeRemaining(clock string) bool {
-	for _, r := range clock {
-		if r >= '1' && r <= '9' {
-			return true
-		}
-	}
-	return false
-}
-
 func hasLiveSnapshotData(data live.LiveStreamData) bool {
 	return len(data.Drivers) > 0 ||
 		len(data.DriverInfo) > 0 ||

internal/web/live_archive_test.go

@@ -51,101 +51,6 @@ func TestSSEHubArchivesTerminalSessionSnapshot(t *testing.T) {
 	}
 }
 
-func TestSnapshotIsLive(t *testing.T) {
-	redFlag := live.LiveStreamData{
-		SessionStatus: "Inactive",
-		TrackStatus:   "2",
-		Clock:         "00:03:27",
-		Session:       live.LiveSessionMeta{MeetingName: "Belgian Grand Prix", SessionName: "Practice 2", SessionType: "Practice"},
-	}
-	tests := []struct {
-		name string
-		data live.LiveStreamData
-		want bool
-	}{
-		{"started", live.LiveStreamData{SessionStatus: "Started"}, true},
-		{"resumed", live.LiveStreamData{SessionStatus: "Resumed"}, true},
-		{"red flag inactive with clock and session", redFlag, true},
-		{"terminal finished with clock", func() live.LiveStreamData {
-			d := redFlag
-			d.SessionStatus = "Finished"
-			return d
-		}(), false},
-		{"inactive spent clock", func() live.LiveStreamData {
-			d := redFlag
-			d.Clock = "00:00:00"
-			return d
-		}(), false},
-		{"inactive no clock", func() live.LiveStreamData {
-			d := redFlag
-			d.Clock = ""
-			return d
-		}(), false},
-		{"inactive no session metadata", func() live.LiveStreamData {
-			d := redFlag
-			d.Session = live.LiveSessionMeta{}
-			return d
-		}(), false},
-	}
-	for _, tt := range tests {
-		if got := snapshotIsLive(tt.data); got != tt.want {
-			t.Errorf("%s: snapshotIsLive = %v, want %v", tt.name, got, tt.want)
-		}
-	}
-}
-
-func TestSSEHubKeepsRedFlagSessionLive(t *testing.T) {
-	hub := newSSEHub()
-	now := time.Date(2026, 7, 26, 14, 0, 0, 0, time.UTC)
-
-	redFlag := live.LiveStreamData{
-		SessionStatus:   "Inactive",
-		TrackStatus:     "2",
-		Clock:           "00:03:27",
-		Session:         live.LiveSessionMeta{MeetingName: "Belgian Grand Prix", SessionName: "Practice 2", SessionType: "Practice"},
-		SnapshotUpdated: true,
-	}
-	state := hub.applySnapshot(redFlag, now)
-
-	if !state.IsLive {
-		t.Fatal("red-flag paused session should report is_live=true")
-	}
-	if state.Data == nil {
-		t.Fatal("red-flag paused session must still send the active snapshot")
-	}
-	if state.Data.TrackStatus != "2" {
-		t.Fatalf("track status = %q, want the paused state \"2\"", state.Data.TrackStatus)
-	}
-	if state.LastSnapshot != nil {
-		t.Fatalf("red-flag session should not be archived: %+v", state.LastSnapshot)
-	}
-}
-
-func TestSSEHubStaleInactiveSnapshotNotLive(t *testing.T) {
-	hub := newSSEHub()
-	now := time.Date(2026, 7, 26, 14, 0, 0, 0, time.UTC)
-
-	// Inactive snapshot with session metadata but no remaining clock: this is a
-	// stale/no-live-evidence snapshot and must not be surfaced as live.
-	stale := live.LiveStreamData{
-		SessionStatus:   "Inactive",
-		Clock:           "00:00:00",
-		Session:         live.LiveSessionMeta{MeetingName: "Belgian Grand Prix", SessionName: "Practice 2"},
-		SnapshotUpdated: true,
-	}
-	state := hub.applySnapshot(stale, now)
-
-	if state.IsLive {
-		t.Fatal("stale inactive snapshot should report is_live=false")
-	}
-	if state.Data != nil {
-		t.Fatalf("stale inactive snapshot leaked into active data: %+v", state.Data)
-	}
-	if state.LastSnapshot == nil {
-		t.Fatal("stale inactive snapshot with metadata should be archived")
-	}
-}
-
 func TestHandleLiveStateKeepsArchiveOutOfActiveData(t *testing.T) {
 	hub := newSSEHub()
 	now := time.Date(2026, 7, 4, 14, 0, 0, 0, time.UTC)

scripts/seed-e2e-db/main.go

@@ -84,14 +84,20 @@ func seedMeeting(st *store.Store, meetingKey int) error {
 }
 
 func seedSession(st *store.Store, sessionKey, meetingKey int, name string) error {
+	start, end := "2025-05-25T13:00:00+00:00", "2025-05-25T15:00:00+00:00"
+	// Core-only is an earlier weekend session so Weekend Context's
+	// default_analysis_session prefers the later full Race.
+	if name == "Core Only" {
+		start, end = "2025-05-24T13:00:00+00:00", "2025-05-24T15:00:00+00:00"
+	}
 	return st.UpsertSession(store.Session{
 		SessionKey:  sessionKey,
 		MeetingKey:  meetingKey,
 		SessionName: name,
 		SessionType: "Race",
 		CircuitKey:  10,
-		DateStart:   "2025-05-25T13:00:00+00:00",
+		DateStart:   start,
-		DateEnd:     "2025-05-25T15:00:00+00:00",
+		DateEnd:     end,
 	})
 }
 

tests/command-center.spec.ts

@@ -1,77 +0,0 @@
-import { test, expect } from '@playwright/test'
-
-const FULL_SESSION = 9472
-
-test.describe('Command Center', () => {
-  test('loads as default route with weekend identity band', async ({ page }) => {
-    await page.goto('/')
-
-    await expect(page.getByTestId('command-center')).toBeVisible()
-    await expect(page.getByTestId('cc-focus')).toBeVisible()
-    await expect(page.getByTestId('cc-session-9472')).toBeVisible()
-    await expect(page.getByTestId('hero-last-race-link')).toBeVisible()
-  })
-
-  test('nav link reaches command center from race hub', async ({ page }) => {
-    await page.goto(`/race-hub?session_key=${FULL_SESSION}`)
-    await page.getByRole('link', { name: 'Command' }).click()
-    await expect(page).toHaveURL('/')
-    await expect(page.getByTestId('command-center')).toBeVisible()
-  })
-
-  test('open analysis action opens race hub for the focus session', async ({ page }) => {
-    await page.goto('/')
-    await expect(page.getByTestId('hero-last-race-link')).toBeVisible()
-    await page.getByTestId('hero-last-race-link').click()
-    await expect(page).toHaveURL(new RegExp(`/race-hub\\?session_key=${FULL_SESSION}`))
-    await expect(page.getByTestId('rh-identity')).toBeVisible()
-    await expect(page.getByTestId(`rh-session-${FULL_SESSION}`)).toBeVisible()
-  })
-
-  test('archived live snapshot does not mark command center live', async ({ page }) => {
-    await page.route('**/api/v1/live/state', (route) =>
-      route.fulfill({
-        contentType: 'application/json',
-        body: JSON.stringify({
-          is_live: false,
-          data: null,
-          last_snapshot: {
-            Drivers: { '1': { RacingNumber: '1', Position: 1 } },
-            DriverInfo: { '1': { RacingNumber: '1', Tla: 'VER', TeamColour: '3671C6' } },
-            Tyres: {},
-            RCMessages: [],
-            Weather: {},
-            Session: { MeetingName: 'Archived GP', SessionName: 'Race', SessionType: 'Race' },
-            TeamRadio: [],
-            SessionStatus: 'Finished',
-            TrackStatus: '1',
-            CurrentLap: 57,
-            TotalLaps: 57,
-            Clock: '',
-            ClockRefTime: '',
-            ClockExtrapolating: false,
-            Stints: {},
-          },
-          last_snapshot_at: '2026-07-04T14:00:00Z',
-        }),
-      }),
-    )
-
-    await page.goto('/')
-    await expect(page.getByTestId('command-center')).toBeVisible()
-    await expect(page.getByTestId('cc-live-status')).toContainText('No live session')
-    await expect(page.getByTestId('cc-live-status')).not.toContainText('Live session active')
-  })
-
-  test('existing routes continue to work', async ({ page }) => {
-    await page.goto(`/race-hub?session_key=${FULL_SESSION}`)
-    await expect(page.getByTestId('race-hub')).toBeVisible()
-    await expect(page.getByTestId('rh-overview')).toBeVisible()
-
-    await page.goto('/admin')
-    await expect(page.getByTestId('data-library')).toBeVisible()
-
-    await page.goto('/live')
-    await expect(page.getByTestId('live-empty')).toBeVisible()
-  })
-})

tests/fixtures/future-session.ts

@@ -0,0 +1,78 @@
+import type { Page } from '@playwright/test'
+
+/** Isolated future-session key — not present in the shared e2e seed DB. */
+export const FUTURE_SESSION = 9600
+export const FUTURE_MEETING = 1300
+
+const emptyDatasets = {}
+
+const futureMeeting = {
+  meeting_key: FUTURE_MEETING,
+  meeting_name: 'Future Grand Prix',
+  meeting_official_name: 'FORMULA 1 FUTURE GRAND PRIX 2099',
+  location: 'Futureville',
+  country_name: 'Testland',
+  country_code: 'TST',
+  country_flag: '',
+  circuit_short_name: 'Future',
+  date_start: '2099-05-23T00:00:00+00:00',
+  date_end: '2099-05-25T00:00:00+00:00',
+  year: 2099,
+}
+
+const futureSession = {
+  session_key: FUTURE_SESSION,
+  session_name: 'Race',
+  session_type: 'Race',
+  meeting_key: FUTURE_MEETING,
+  date_start: '2099-05-25T13:00:00+00:00',
+  date_end: '2099-05-25T15:00:00+00:00',
+  gmt_offset: '00:00:00',
+}
+
+const futureRaceHub = {
+  source: 'none',
+  session_key: FUTURE_SESSION,
+  datasets: emptyDatasets,
+  meeting: futureMeeting,
+  session: futureSession,
+  drivers: [],
+  results: [],
+  starting_grid: [],
+  stints: [],
+  pit_stops: [],
+  positions: [],
+  race_control: [],
+  weather: [],
+  laps: [],
+  chapters: [],
+}
+
+const futureWeekend = {
+  source: 'none',
+  meeting_key: FUTURE_MEETING,
+  meeting: futureMeeting,
+  default_session_key: FUTURE_SESSION,
+  sessions: [{ session: futureSession, source: 'none', datasets: emptyDatasets }],
+}
+
+/**
+ * Route-mock a far-future session without contaminating the shared Monaco seed
+ * (which would rewrite Command Center / Data Library baselines).
+ */
+export async function mockFutureRaceHubSession(page: Page): Promise<void> {
+  await page.route(`**/api/v1/race-hub?session_key=${FUTURE_SESSION}`, async (route) => {
+    await route.fulfill({
+      status: 200,
+      contentType: 'application/json',
+      body: JSON.stringify(futureRaceHub),
+    })
+  })
+  await page.route(`**/api/v1/weekend?meeting_key=${FUTURE_MEETING}`, async (route) => {
+    await route.fulfill({
+      status: 200,
+      contentType: 'application/json',
+      body: JSON.stringify(futureWeekend),
+    })
+  })
+}

tests/issue-76-availability.spec.ts

@@ -0,0 +1,385 @@
+import { test, expect, type Page } from '@playwright/test'
+import path from 'node:path'
+
+const evidenceDir = path.join('tests', 'evidence', 'issue-76-availability')
+
+const availability = {
+  source: 'local',
+  schedule: 'available',
+  live_transport: 'unknown',
+  live_session: 'inactive',
+  archive: 'unavailable',
+  local_analysis: 'partial',
+  freshness: 'partial',
+  limitations: [],
+}
+
+function meeting(key: number, name: string, start: string) {
+  return {
+    meeting_key: key,
+    meeting_name: name,
+    meeting_official_name: name,
+    location: name,
+    country_code: 'HUN',
+    country_name: 'Hungary',
+    country_flag: '',
+    circuit_key: key,
+    circuit_short_name: name,
+    date_start: start,
+    date_end: start,
+    year: 2026,
+  }
+}
+
+function ctxSession(key: number, name: string, start: string, meetingKey: number) {
+  return {
+    session: {
+      session_key: key,
+      session_name: name,
+      session_type: name,
+      meeting_key: meetingKey,
+      date_start: start,
+      date_end: start,
+      gmt_offset: '',
+    },
+    meeting: meeting(meetingKey, 'Hungarian Grand Prix', start),
+    availability,
+  }
+}
+
+async function stubPreSession(page: Page, opts?: { failSessions?: boolean; recover?: boolean }) {
+  const next = meeting(2, 'Hungarian Grand Prix', '2026-07-24T09:00:00Z')
+  await page.route('**/api/v1/weekend-context', (route) =>
+    route.fulfill({
+      contentType: 'application/json',
+      headers: {
+        'X-BoxBox-Data-Source': 'local',
+        'X-BoxBox-Data-Freshness': 'partial',
+      },
+      body: JSON.stringify({
+        season: 2026,
+        temporal_state: 'pre_session',
+        focus_meeting: next,
+        next_meeting: next,
+        next_session: ctxSession(21, 'Practice 1', '2026-07-24T09:00:00Z', 2),
+        championship_round: 13,
+        total_championship_rounds: 24,
+      }),
+    }),
+  )
+  await page.route('**/api/v1/news**', (route) =>
+    route.fulfill({ contentType: 'application/json', body: '[]' }),
+  )
+  await page.route('**/api/v1/championship/hub**', (route) =>
+    route.fulfill({
+      contentType: 'application/json',
+      headers: {
+        'X-BoxBox-Data-Source': 'openf1',
+        'X-BoxBox-Data-Freshness': 'stale',
+      },
+      body: JSON.stringify({
+        season: 2026,
+        round: 12,
+        total_rounds: 24,
+        rounds_left: 12,
+        last_race: 'British GP',
+        round_labels: [],
+        drivers: [
+          {
+            driver_number: 1,
+            name_acronym: 'VER',
+            full_name: 'Max Verstappen',
+            team_name: 'Red Bull',
+            team_colour: '3671c6',
+            points: 200,
+            position: 1,
+            wins: 5,
+            podiums: 8,
+            poles: 4,
+            form: [25, 18, 25, 15, 25],
+            cumulative: [25, 43, 68, 83, 108, 200],
+            round_positions: [1, 2, 1, 3, 1, 1],
+            teammate_wins: 9,
+            teammate_losses: 1,
+          },
+          {
+            driver_number: 4,
+            name_acronym: 'NOR',
+            full_name: 'Lando Norris',
+            team_name: 'McLaren',
+            team_colour: 'ff8000',
+            points: 160,
+            position: 2,
+            wins: 3,
+            podiums: 5,
+            poles: 2,
+            form: [18, 25, 18, 25, 18],
+            cumulative: [18, 43, 61, 86, 104, 160],
+            round_positions: [2, 1, 2, 2, 2, 2],
+            teammate_wins: 6,
+            teammate_losses: 4,
+          },
+          {
+            driver_number: 81,
+            name_acronym: 'PIA',
+            full_name: 'Oscar Piastri',
+            team_name: 'McLaren',
+            team_colour: 'ff8000',
+            points: 140,
+            position: 3,
+            wins: 2,
+            podiums: 4,
+            poles: 1,
+            form: [15, 12, 18, 10, 15],
+            cumulative: [15, 27, 45, 55, 70, 140],
+            round_positions: [3, 3, 2, 4, 3, 3],
+            teammate_wins: 4,
+            teammate_losses: 6,
+          },
+        ],
+        teams: [
+          { team_name: 'Red Bull', team_colour: '3671c6', points: 260, position: 1, wins: 6 },
+          { team_name: 'McLaren', team_colour: 'ff8000', points: 300, position: 2, wins: 5 },
+        ],
+      }),
+    }),
+  )
+
+  let sessionCalls = 0
+  await page.route('**/api/v1/sessions**', async (route) => {
+    sessionCalls += 1
+    if (opts?.failSessions && !(opts.recover && sessionCalls > 1)) {
+      await route.fulfill({
+        status: 500,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'API 500: forced sessions failure' }),
+      })
+      return
+    }
+    await route.fulfill({
+      contentType: 'application/json',
+      body: JSON.stringify([
+        {
+          session_key: 21,
+          session_name: 'Practice 1',
+          session_type: 'Practice',
+          meeting_key: 2,
+          date_start: '2026-07-24T09:00:00Z',
+          date_end: '2026-07-24T10:00:00Z',
+          gmt_offset: '',
+        },
+      ]),
+    })
+  })
+
+  await page.route('**/api/v1/meetings**', (route) =>
+    route.fulfill({ contentType: 'application/json', body: '[]' }),
+  )
+  await page.route('**/api/v1/track-outline**', (route) =>
+    route.fulfill({
+      contentType: 'application/json',
+      body: JSON.stringify({ error: 'unavailable' }),
+    }),
+  )
+}
+
+test.describe('Issue #76 availability / Preview resilience evidence', () => {
+  test('Weekend pre-session recovers Preview sessions via Retry and keeps distinct notices', async ({
+    page,
+  }, testInfo) => {
+    let sessionCalls = 0
+    let allowSessions = false
+    await stubPreSession(page)
+    await page.unroute('**/api/v1/sessions**')
+    await page.route('**/api/v1/sessions**', async (route) => {
+      const url = new URL(route.request().url())
+      if (url.searchParams.get('meeting_key') === '2') {
+        sessionCalls += 1
+      }
+      if (!allowSessions) {
+        await route.fulfill({
+          status: 500,
+          contentType: 'application/json',
+          body: JSON.stringify({ error: 'API 500: forced sessions failure' }),
+        })
+        return
+      }
+      await route.fulfill({
+        contentType: 'application/json',
+        body: JSON.stringify([
+          {
+            session_key: 21,
+            session_name: 'Practice 1',
+            session_type: 'Practice',
+            meeting_key: 2,
+            date_start: '2026-07-24T09:00:00Z',
+            date_end: '2026-07-24T10:00:00Z',
+            gmt_offset: '',
+          },
+        ]),
+      })
+    })
+
+    await page.setViewportSize({ width: 390, height: 844 })
+    await page.goto('/')
+
+    await expect(page.getByTestId('weekend-pre-session')).toBeVisible()
+    await expect(page.getByTestId('wk-pre-head')).toContainText('Hungarian Grand Prix')
+    await expect(page.getByTestId('weekend-data-notice')).toContainText(/Partial/i)
+    // Shell Partial + Preview championship Stale are distinct — both may show.
+    await expect(page.getByTestId('preview-data-notice')).toContainText(/Stale/i)
+    await expect(page.getByTestId('preview-page')).toBeVisible()
+    await expect(page.getByTestId('preview-page')).toHaveAttribute('data-meeting-key', '2')
+    await expect(page.getByTestId('preview-sessions-error')).toBeVisible()
+    await expect(page.locator('body')).not.toContainText(/API 500|forced sessions failure/i)
+    await expect(page.getByTestId('preview-title-fight-card')).toContainText('VER')
+
+    const failedCalls = sessionCalls
+    expect(failedCalls).toBeGreaterThanOrEqual(1)
+
+    allowSessions = true
+    const retry = page.getByTestId('preview-sessions-retry')
+    await expect(retry).toBeEnabled()
+    await retry.click()
+    await expect(page.getByTestId('preview-schedule')).toContainText('Practice 1')
+    await expect(page.getByTestId('preview-sessions-error')).toHaveCount(0)
+    expect(sessionCalls).toBe(failedCalls + 1)
+
+    await page.screenshot({
+      path: path.join(evidenceDir, `weekend-presession-failure-mobile-${testInfo.project.name}.png`),
+      fullPage: true,
+    })
+
+    await page.setViewportSize({ width: 1440, height: 900 })
+    await page.screenshot({
+      path: path.join(evidenceDir, `weekend-presession-partial-desktop-${testInfo.project.name}.png`),
+      fullPage: true,
+    })
+    await expect(page.getByTestId('weekend-data-notice')).toContainText(/Partial/i)
+    await expect(page.getByTestId('preview-data-notice')).toContainText(/Stale/i)
+  })
+
+  test('Championship discloses stale metadata above usable standings', async ({ page }, testInfo) => {
+    await page.route('**/api/v1/seasons', (route) =>
+      route.fulfill({ contentType: 'application/json', body: JSON.stringify([2026]) }),
+    )
+    await page.route('**/api/v1/championship/hub**', (route) =>
+      route.fulfill({
+        contentType: 'application/json',
+        headers: {
+          'X-BoxBox-Data-Source': 'openf1',
+          'X-BoxBox-Data-Freshness': 'stale',
+        },
+        body: JSON.stringify({
+          season: 2026,
+          round: 6,
+          total_rounds: 24,
+          rounds_left: 18,
+          last_race: 'Monaco GP',
+          round_labels: ['R1', 'R2', 'R3', 'R4', 'R5', 'R6'],
+          drivers: [
+            {
+              driver_number: 1,
+              name_acronym: 'VER',
+              full_name: 'Max Verstappen',
+              team_name: 'Red Bull',
+              team_colour: '3671c6',
+              points: 200,
+              position: 1,
+              wins: 5,
+              podiums: 8,
+              poles: 4,
+              form: [25, 18, 25, 15, 25],
+              cumulative: [25, 43, 68, 83, 108, 200],
+              round_positions: [1, 2, 1, 3, 1, 1],
+              teammate_wins: 9,
+              teammate_losses: 1,
+            },
+            {
+              driver_number: 4,
+              name_acronym: 'NOR',
+              full_name: 'Lando Norris',
+              team_name: 'McLaren',
+              team_colour: 'ff8000',
+              points: 160,
+              position: 2,
+              wins: 3,
+              podiums: 5,
+              poles: 2,
+              form: [18, 25, 18, 25, 18],
+              cumulative: [18, 43, 61, 86, 104, 160],
+              round_positions: [2, 1, 2, 2, 2, 2],
+              teammate_wins: 6,
+              teammate_losses: 4,
+            },
+          ],
+          teams: [
+            { team_name: 'Red Bull', team_colour: '3671c6', points: 260, position: 1, wins: 6 },
+            { team_name: 'McLaren', team_colour: 'ff8000', points: 220, position: 2, wins: 3 },
+          ],
+        }),
+      }),
+    )
+
+    await page.setViewportSize({ width: 768, height: 1024 })
+    await page.goto('/championship')
+    await expect(page.getByTestId('championship-data-notice')).toContainText(/Stale/i)
+    await expect(page.getByTestId('champ-view-drivers')).toBeVisible()
+    await page.screenshot({
+      path: path.join(evidenceDir, `championship-stale-tablet-${testInfo.project.name}.png`),
+      fullPage: true,
+    })
+  })
+
+  test('Briefing Limited notice keeps articles usable', async ({ page }, testInfo) => {
+    await page.route('**/api/v1/news**', (route) =>
+      route.fulfill({
+        contentType: 'application/json',
+        headers: {
+          'X-BoxBox-Data-Source': 'local',
+          'X-BoxBox-Data-Freshness': 'local',
+        },
+        body: JSON.stringify([
+          {
+            id: 1,
+            title: 'Paddock briefing sample',
+            url: 'https://example.com/a',
+            source: 'Autosport',
+            published_at: '2025-04-01T12:00:00Z',
+            summary: 'Sample article remains usable.',
+            category: 'news',
+          },
+        ]),
+      }),
+    )
+    await page.route('**/api/v1/seasons', (route) =>
+      route.fulfill({ contentType: 'application/json', body: JSON.stringify([2025]) }),
+    )
+    await page.route('**/api/v1/meetings**', (route) =>
+      route.fulfill({
+        status: 503,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'API 503: meetings unavailable' }),
+      }),
+    )
+    await page.route('**/api/v1/championship/hub**', (route) =>
+      route.fulfill({
+        status: 503,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'API 503: hub unavailable' }),
+      }),
+    )
+
+    await page.setViewportSize({ width: 390, height: 844 })
+    await page.goto('/briefing')
+    await expect(page.getByTestId('briefing-data-notice')).toContainText(/Limited/i)
+    await expect(page.getByText('Paddock briefing sample')).toBeVisible()
+    await expect(page.locator('body')).not.toContainText(/API 503/i)
+    const retry = page.getByTestId('briefing-data-notice').getByRole('button', { name: 'Retry' })
+    await expect(retry).toBeEnabled()
+    await page.screenshot({
+      path: path.join(evidenceDir, `briefing-limited-mobile-${testInfo.project.name}.png`),
+      fullPage: true,
+    })
+  })
+})

tests/live-timing.spec.ts

@@ -93,6 +93,7 @@ const raceSnapshot = {
       SessionType: 'Race',
       SessionName: 'Race',
     },
+    SessionStatus: 'Started',
     TrackStatus: '2',
     CurrentLap: 30,
     TotalLaps: 57,
@@ -138,6 +139,7 @@ const sprintQualifyingSnapshot = {
       SessionType: 'Sprint Qualifying',
       SessionName: 'Sprint Qualifying',
     },
+    SessionStatus: 'Started',
     TrackStatus: '1',
     CurrentLap: 0,
     TotalLaps: 0,
@@ -147,58 +149,6 @@ const sprintQualifyingSnapshot = {
   },
 }
 
-// Practice: the feed sets best laps but no GapToLeader/Interval, and there is
-// no race lap-total concept. Exercises computed gaps, the non-race banner, the
-// collapsed-by-default tyre panel, and the 390px core-field layout.
-const practiceSnapshot = {
-  is_live: true,
-  data: {
-    ...raceSnapshot.data,
-    Drivers: Object.fromEntries(
-      Array.from({ length: 10 }, (_, index) => {
-        const num = String(index + 1)
-        return [
-          num,
-          driver(num, index + 1, '', '', {
-            // Distinct, increasing best laps; P1 fastest, +0.200s per position.
-            BestLapTime: `1:${(45.9 + index * 0.2).toFixed(3).padStart(6, '0')}`,
-            LastLapTime: '1:46.500',
-            NumberOfLaps: 12,
-            Sectors: index === 0
-              ? [
-                  { Value: '28.500', PersonalFastest: true, OverallFastest: false },
-                  { Value: '52.100', PersonalFastest: false, OverallFastest: false },
-                  { Value: '25.344', PersonalFastest: false, OverallFastest: false },
-                ]
-              : [],
-          }),
-        ]
-      }),
-    ),
-    DriverInfo: Object.fromEntries(
-      Array.from({ length: 10 }, (_, index) => {
-        const num = String(index + 1)
-        return [num, info(num, `D${index + 1}`, 'Driver', String(index + 1), 'Test Team', index % 2 ? 'FF8000' : '27F4D2')]
-      }),
-    ),
-    Tyres: Object.fromEntries(
-      Array.from({ length: 10 }, (_, index) => [String(index + 1), { Compound: 'SOFT', New: false, Age: index % 4 }]),
-    ),
-    Session: {
-      MeetingName: 'Belgian Grand Prix',
-      CircuitName: 'Spa-Francorchamps',
-      SessionType: 'Practice',
-      SessionName: 'Practice 2',
-    },
-    TrackStatus: '1',
-    CurrentLap: 0,
-    TotalLaps: 0,
-    Clock: '00:45:00',
-    ClockRefTime: '2026-07-17T13:00:00Z',
-    ClockExtrapolating: false,
-  },
-}
-
 test.describe('Live Timing (mocked snapshot)', () => {
   test.beforeEach(async ({ page }) => {
     await page.route('**/api/v1/live/state', (route) =>
@@ -216,6 +166,12 @@ test.describe('Live Timing (mocked snapshot)', () => {
 
   test('renders timing tower with drivers from the snapshot', async ({ page }) => {
     await expect(page.getByTestId('live-page')).toBeVisible()
+    // The hermetic SSE mock ends after a heartbeat, so transport may drop to
+    // disconnected while the session snapshot remains active — both phases keep
+    // the LIVE SESSION chrome and timing tower.
+    await expect(page.getByTestId('live-page')).toHaveAttribute('data-phase', /^(live|disconnected)$/)
+    await expect(page.getByTestId('live-session-flag')).toContainText('LIVE SESSION')
+    await expect(page.getByTestId('live-feed-health')).toBeVisible()
     const tower = page.locator('.live-tower')
     await expect(tower).toBeVisible()
     await expect(tower).toContainText('VER')
@@ -285,133 +241,266 @@ test.describe('Live Timing (mocked Sprint Qualifying)', () => {
   })
 })
 
-test.describe('Live Timing (mocked Practice)', () => {
+const weekendContext = (localAnalysis: string) => ({
-  test.beforeEach(async ({ page }) => {
+  temporal_state: 'session_settling',
-    await page.route('**/api/v1/live/state', (route) =>
+  focus_meeting: {
-      route.fulfill({ contentType: 'application/json', body: JSON.stringify(practiceSnapshot) }),
+    meeting_key: 1,
-    )
+    meeting_name: 'Testonia Grand Prix',
-    await page.route('**/api/v1/live/stream', (route) =>
+    meeting_official_name: 'Testonia Grand Prix',
-      route.fulfill({ contentType: 'text/event-stream', body: 'event: heartbeat\ndata: {}\n\n' }),
+    location: 'Testring',
-    )
+    country_name: 'Testonia',
-    await page.goto('/live')
+    country_code: 'TS',
+    country_flag: '',
+    circuit_short_name: 'Testring',
+    date_start: '2026-07-03T09:00:00Z',
+    date_end: '2026-07-05T16:00:00Z',
+    year: 2026,
+  },
+  // Just-finished session lives in previous_completed_session (canonical contract).
+  previous_completed_session: {
+    session: {
+      session_key: 9472,
+      session_name: 'Race',
+      session_type: 'Race',
+      meeting_key: 1,
+      date_start: '2026-07-05T14:00:00Z',
+      date_end: '2026-07-05T16:00:00Z',
+      gmt_offset: '',
+    },
+    availability: {
+      schedule: 'available',
+      live_transport: 'unknown',
+      live_session: 'inactive',
+      archive: 'available',
+      local_analysis: localAnalysis,
+      freshness: 'fresh',
+      limitations: [],
+    },
+  },
+  championship_round: 1,
+  total_championship_rounds: 1,
 })
 
-  test('derives a gap to P1 from best laps and marks the leader', async ({ page }) => {
+/** Archive-only just-finished Race + older already-ready Practice default. */
-    const tower = page.locator('.live-tower')
+const archiveOnlySettlingContext = (previousAnalysis: string) => ({
-    await expect(tower).toBeVisible()
+  ...weekendContext(previousAnalysis),
-    // P1 shows a leader marker, not a fabricated gap.
+  default_analysis_session: {
-    await expect(tower.locator('tbody tr').first()).toContainText('—')
+    session: {
-    // P2 shows the computed +0.200 delta.
+      session_key: 9001,
-    await expect(tower).toContainText('+0.200')
+      session_name: 'Practice 1',
+      session_type: 'Practice',
+      meeting_key: 1,
+      date_start: '2026-07-04T12:00:00Z',
+      date_end: '2026-07-04T13:00:00Z',
+      gmt_offset: '',
+    },
+    availability: {
+      schedule: 'available',
+      live_transport: 'unknown',
+      live_session: 'inactive',
+      archive: 'available',
+      local_analysis: 'complete',
+      freshness: 'fresh',
+      limitations: [],
+    },
+  },
 })
 
-  test('omits the race lap counter and keeps the session clock for practice', async ({ page }) => {
+const heartbeatStream = (route: import('@playwright/test').Route) =>
-    await expect(page.getByTestId('live-lap-counter')).toHaveCount(0)
+  route.fulfill({ contentType: 'text/event-stream', body: 'event: heartbeat\ndata: {}\n\n' })
-    await expect(page.getByTestId('live-clock')).toContainText('00:45:00')
-    await expect(page.locator('.live-banner')).not.toContainText('L-/-')
-  })
-
-  test('collapses the tyre panel by default so the tower is above the fold', async ({ page }) => {
-    await expect(page.getByTestId('tyredeg-panel')).toBeVisible()
-    await expect(page.getByTestId('tyredeg-row')).toHaveCount(0)
-    await expect(page.locator('.live-tower')).toBeVisible()
-  })
-
-  test('labels Race Control times as UTC', async ({ page }) => {
-    await expect(page.getByTestId('rc-timezone')).toContainText('UTC')
-  })
-
-  test('marks Live as active in the primary navigation', async ({ page }) => {
-    await expect(page.getByTestId('nav-live')).toHaveAttribute('data-live-active', 'true')
-    await expect(page.getByTestId('nav-live').locator('.nav-live-dot')).toBeVisible()
-  })
-})
-
-test.describe('Live Timing (390px practice viewport)', () => {
-  test.use({ viewport: { width: 390, height: 844 } })
-
-  test.beforeEach(async ({ page }) => {
-    await page.route('**/api/v1/live/state', (route) =>
-      route.fulfill({ contentType: 'application/json', body: JSON.stringify(practiceSnapshot) }),
-    )
-    await page.route('**/api/v1/live/stream', (route) =>
-      route.fulfill({ contentType: 'text/event-stream', body: 'event: heartbeat\ndata: {}\n\n' }),
-    )
-    await page.goto('/live')
-  })
-
-  test('shows the five core fields with no horizontal overflow', async ({ page }) => {
-    const tower = page.locator('.live-tower')
-    await expect(tower).toBeVisible()
-
-    // Core comparison fields are present in the header.
-    await expect(tower.locator('thead')).toContainText('Pos')
-    await expect(tower.locator('thead')).toContainText('Driver')
-    await expect(tower.locator('thead')).toContainText('Tyre')
-    await expect(tower.locator('thead')).toContainText('Best')
-    await expect(tower.locator('thead')).toContainText('Gap to P1')
-
-    // Sectors are hidden from the initial mobile tower (reachable via expand).
-    const firstSector = tower.locator('thead th', { hasText: 'S1' })
-    await expect(firstSector).toBeHidden()
-
-    // The document must not scroll horizontally.
-    const overflow = await page.evaluate(
-      () => document.documentElement.scrollWidth - document.documentElement.clientWidth,
-    )
-    expect(overflow).toBeLessThanOrEqual(0)
-  })
-
-  test('exposes sectors through the row detail interaction', async ({ page }) => {
-    // Sector columns are not in the initial mobile tower...
-    await expect(page.locator('.live-tower thead th', { hasText: 'S1' })).toBeHidden()
-    // ...but the P1 row's sectors are reachable by expanding the row.
-    await page.locator('.live-tower tbody tr', { hasText: 'D1' }).first().click()
-    const sectors = page.getByTestId('expanded-sectors')
-    await expect(sectors).toBeVisible()
-    await expect(sectors).toContainText('28.500')
-  })
-})
 
 test.describe('Live Timing (no session)', () => {
-  test('shows the empty state when the feed has no snapshot', async ({ page }) => {
+  test('shows the inactive weekend-context handoff when the feed has no snapshot', async ({ page }) => {
+    await page.route('**/api/v1/live/stream', heartbeatStream)
     await page.goto('/live')
-    await expect(page.getByTestId('live-empty')).toBeVisible()
+    // The e2e server (BOXBOX_DISABLE_LIVE=1) exposes a real /api/v1/weekend-context.
-    await expect(page.getByTestId('live-page')).toContainText('No live session active')
+    await expect(page.getByTestId('live-inactive')).toBeVisible()
+    await expect(page.getByTestId('live-page')).toHaveAttribute('data-phase', 'inactive')
+    await expect(page.getByText('NO LIVE SESSION')).toBeVisible()
   })
 
-  test('renders an archived snapshot only after View Last Session', async ({ page }) => {
+  test('enters settling (not archive) when a finished session is retained', async ({ page }) => {
     await page.route('**/api/v1/live/state', (route) =>
       route.fulfill({
         contentType: 'application/json',
         body: JSON.stringify({
           is_live: false,
           data: null,
-          last_snapshot: {
+          last_snapshot: { ...raceSnapshot.data, SessionStatus: 'Finished' },
-            ...raceSnapshot.data,
+          last_positions: { '1': { x: 100, y: -50, z: 2, status: 'OnTrack' } },
-            SessionStatus: 'Finished',
-          },
-          last_positions: {
-            '1': { x: 100, y: -50, z: 2, status: 'OnTrack' },
-          },
           last_snapshot_at: '2026-07-04T14:00:00Z',
         }),
       }),
     )
+    await page.route('**/api/v1/weekend-context', (route) =>
+      route.fulfill({ contentType: 'application/json', body: JSON.stringify(weekendContext('complete')) }),
+    )
+    await page.route('**/api/v1/live/stream', heartbeatStream)
+
+    await page.goto('/live')
+    await expect(page.getByTestId('live-settling')).toBeVisible()
+    await expect(page.getByTestId('live-page')).toHaveAttribute('data-phase', 'settling')
+    await expect(page.getByText('SESSION SETTLING')).toBeVisible()
+    await expect(page.getByText('Timing Tower')).toHaveCount(0)
+    // Canonical weekend-context drives the analysis target + readiness.
+    const analysis = page.getByTestId('live-handoff-analysis')
+    await expect(analysis).toHaveAttribute('href', '/race-hub?session_key=9472')
+    await expect(analysis).toHaveAttribute('data-ready', 'true')
+
+    // Opening the read-only archive reveals the frozen tower, never LIVE chrome.
+    await page.getByTestId('live-handoff-archive').click()
+    await expect(page.getByTestId('live-archive-strip')).toContainText('read-only')
+    await expect(page.getByText('Timing Tower')).toBeVisible()
+    await expect(page.locator('.live-state')).toContainText('archive')
+    await expect(page.getByText('LIVE SESSION')).toHaveCount(0)
+  })
+
+  test('settling shows pending analysis until weekend-context reports complete', async ({ page }) => {
+    await page.route('**/api/v1/live/state', (route) =>
+      route.fulfill({
+        contentType: 'application/json',
+        body: JSON.stringify({
+          is_live: false,
+          data: null,
+          last_snapshot: { ...raceSnapshot.data, SessionStatus: 'Finished' },
+          last_snapshot_at: '2026-07-04T14:00:00Z',
+        }),
+      }),
+    )
+    await page.route('**/api/v1/weekend-context', (route) =>
+      route.fulfill({ contentType: 'application/json', body: JSON.stringify(weekendContext('pending')) }),
+    )
+    await page.route('**/api/v1/live/stream', heartbeatStream)
+
+    await page.goto('/live')
+    await expect(page.getByTestId('live-settling')).toBeVisible()
+    const analysis = page.getByTestId('live-handoff-analysis')
+    await expect(analysis).toHaveAttribute('data-ready', 'false')
+    await expect(analysis).toContainText(/analysis will fill in as data ingests/i)
+  })
+
+  test('settling targets archive-only previous_completed_session over older default', async ({ page }) => {
+    await page.route('**/api/v1/live/state', (route) =>
+      route.fulfill({
+        contentType: 'application/json',
+        body: JSON.stringify({
+          is_live: false,
+          data: null,
+          last_snapshot: { ...raceSnapshot.data, SessionStatus: 'Finished' },
+          last_snapshot_at: '2026-07-04T14:00:00Z',
+        }),
+      }),
+    )
+    await page.route('**/api/v1/weekend-context', (route) =>
+      route.fulfill({
+        contentType: 'application/json',
+        body: JSON.stringify(archiveOnlySettlingContext('pending')),
+      }),
+    )
+    await page.route('**/api/v1/live/stream', heartbeatStream)
+
+    await page.goto('/live')
+    await expect(page.getByTestId('live-settling')).toBeVisible()
+    const analysis = page.getByTestId('live-handoff-analysis')
+    await expect(analysis).toHaveAttribute('href', '/race-hub?session_key=9472')
+    await expect(analysis).toHaveAttribute('data-ready', 'false')
+    await expect(analysis).toContainText('Open Race analysis')
+    await expect(analysis).not.toContainText('Practice 1')
+  })
+
+  test('retains the last live snapshot with a disconnected warning on a feed drop', async ({ page }) => {
+    // is_live=false but SessionStatus is still "Started": the FIA feed dropped
+    // mid-session. The page must warn + retain the live tower, never settle.
+    // Keep the browser SSE open via a long-lived stream so transport stays connected
+    // while phase is disconnected — health must still say Reconnecting.
+    await page.route('**/api/v1/live/state', (route) =>
+      route.fulfill({
+        contentType: 'application/json',
+        body: JSON.stringify({
+          is_live: false,
+          data: null,
+          last_snapshot: { ...raceSnapshot.data, SessionStatus: 'Started' },
+          last_snapshot_at: '2026-07-04T13:30:00Z',
+        }),
+      }),
+    )
+    await page.route('**/api/v1/weekend-context', (route) =>
+      route.fulfill({ contentType: 'application/json', body: JSON.stringify(weekendContext('pending')) }),
+    )
+    await page.route('**/api/v1/live/stream', async (route) => {
+      const body = [
+        'event: heartbeat',
+        'data: {}',
+        '',
+        'event: heartbeat',
+        'data: {}',
+        '',
+      ].join('\n')
+      await route.fulfill({
+        contentType: 'text/event-stream',
+        headers: { 'Cache-Control': 'no-cache' },
+        body,
+      })
+    })
+
+    await page.goto('/live')
+    await expect(page.getByTestId('live-page')).toHaveAttribute('data-phase', 'disconnected')
+    await expect(page.getByTestId('live-disconnected-strip')).toContainText('last live data')
+    await expect(page.getByText('Timing Tower')).toBeVisible()
+    await expect(page.getByTestId('live-settling')).toHaveCount(0)
+    await expect(page.getByTestId('live-archive-strip')).toHaveCount(0)
+    await expect(page.getByTestId('live-feed-health')).toContainText(/reconnecting/i)
+    await expect(page.getByTestId('live-feed-health')).not.toContainText(/feed healthy/i)
+  })
+
+  test('clears fatal initial error once SSE supplies a live snapshot', async ({ page }) => {
+    await page.route('**/api/v1/live/state', (route) =>
+      route.fulfill({
+        status: 503,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'API 503: live state unavailable' }),
+      }),
+    )
     await page.route('**/api/v1/live/stream', (route) =>
       route.fulfill({
         contentType: 'text/event-stream',
-        body: 'event: heartbeat\ndata: {}\n\n',
+        headers: { 'Cache-Control': 'no-cache' },
+        body: `event: snapshot\ndata: ${JSON.stringify(raceSnapshot)}\n\n`,
       }),
     )
 
     await page.goto('/live')
-    await expect(page.getByTestId('live-empty')).toContainText('No live session active')
+    await expect(page.getByText('Timing Tower')).toBeVisible({ timeout: 15_000 })
-    await expect(page.getByText('Timing Tower')).toHaveCount(0)
+    await expect(page.getByTestId('live-initial-error')).toHaveCount(0)
+    await expect(page.getByText(/Live timing unavailable/i)).toHaveCount(0)
+    await expect(page.getByTestId('live-page')).toHaveAttribute('data-phase', /^(live|disconnected)$/)
+    await expect(page.locator('.live-tower')).toContainText('VER')
+  })
 
-    await page.getByRole('button', { name: 'View Last Session' }).click()
+  test('clears fatal initial error once SSE supplies an inactive null state', async ({ page }) => {
-    await expect(page.getByTestId('live-archive-strip')).toContainText('Archived snapshot')
+    await page.route('**/api/v1/live/state', (route) =>
-    await expect(page.getByText('Timing Tower')).toBeVisible()
+      route.fulfill({
-    await expect(page.locator('.live-state')).toContainText('archive')
+        status: 503,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'API 503: live state unavailable' }),
+      }),
+    )
+    await page.route('**/api/v1/live/stream', (route) =>
+      route.fulfill({
+        contentType: 'text/event-stream',
+        headers: { 'Cache-Control': 'no-cache' },
+        body: `event: snapshot\ndata: ${JSON.stringify({
+          is_live: false,
+          data: null,
+          last_snapshot: null,
+        })}\n\n`,
+      }),
+    )
+
+    await page.goto('/live')
+    await expect(page.getByTestId('live-inactive')).toBeVisible({ timeout: 15_000 })
+    await expect(page.getByTestId('live-initial-error')).toHaveCount(0)
+    await expect(page.getByText(/Live timing unavailable/i)).toHaveCount(0)
+    await expect(page.getByTestId('live-page')).toHaveAttribute('data-phase', 'inactive')
   })
 })

tests/production-smoke.spec.ts

@@ -3,11 +3,11 @@ import { test, expect } from '@playwright/test'
 const FULL_SESSION = 9472
 
 test.describe('Production serving (Go + built React)', () => {
-  test('serves command center as default route', async ({ page }) => {
+  test('serves the Weekend home as default route', async ({ page }) => {
     await page.goto('/')
 
-    await expect(page.getByTestId('command-center')).toBeVisible()
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
-    await expect(page.getByTestId('cc-session-9472')).toBeVisible()
+    await expect(page.getByTestId('weekend-between-races')).toBeVisible()
   })
 
   test('serves race hub workspace from built assets', async ({ page }) => {
@@ -18,8 +18,15 @@ test.describe('Production serving (Go + built React)', () => {
     await expect(page.getByTestId(`rh-session-${FULL_SESSION}`)).toBeVisible()
 
     await page.getByRole('tab', { name: 'Race Story' }).click()
-    await expect(page.getByText('Final Classification')).toBeVisible()
+
-    await expect(page.locator('.drv-code', { hasText: 'VER' })).toBeVisible()
+    const outcome = page.getByRole('region', { name: 'Final running order' })
+    await expect(outcome).toBeVisible()
+    await expect(outcome).toHaveAttribute('data-testid', 'race-story-outcome')
+
+    const verRow = page.locator('.rs-driver-row', {
+      has: page.locator('.rs-driver-name', { hasText: 'VER' }),
+    })
+    await expect(verRow.locator('.rs-pos-col')).toHaveText('1')
   })
 
   test('serves admin / data health route', async ({ page }) => {
@@ -37,23 +44,28 @@ test.describe('Production serving (Go + built React)', () => {
     await expect(page.getByTestId('dl-meeting-1229')).toBeVisible()
   })
 
-  test('serves live route with empty state when live is disabled', async ({ page }) => {
+  test('serves live route with the inactive handoff when live is disabled', async ({ page }) => {
     await page.goto('/live')
 
-    await expect(page.getByTestId('live-empty')).toBeVisible()
+    await expect(page.getByTestId('live-inactive')).toBeVisible()
-    await expect(page.getByText('No live session active')).toBeVisible()
+    await expect(page.getByText('NO LIVE SESSION')).toBeVisible()
   })
 
-  test('nav links work from built SPA', async ({ page }) => {
+  test('primary nav links and Admin utility work from built SPA', async ({ page }) => {
     await page.goto('/')
-    await page.locator('.app-nav').getByRole('link', { name: 'Race Hub' }).click()
+    const primary = page.getByRole('navigation', { name: 'Primary' }).first()
-    await expect(page).toHaveURL(/\/race-hub/)
 
-    await page.locator('.app-nav').getByRole('link', { name: 'Admin', exact: true }).click()
+    await primary.getByRole('link', { name: 'Championship', exact: true }).click()
+    await expect(page).toHaveURL(/\/championship/)
+
+    await primary.getByRole('link', { name: 'Explore', exact: true }).click()
+    await expect(page).toHaveURL(/\/explore/)
+
+    await primary.getByRole('link', { name: 'Weekend', exact: true }).click()
+    await expect(page).toHaveURL('/')
+
+    // Admin is an operator utility outside the Primary landmark.
+    await page.getByRole('toolbar', { name: 'Operator utilities' }).getByRole('link', { name: 'Admin' }).click()
     await expect(page).toHaveURL(/\/admin/)
-
-    await page.getByRole('link', { name: 'Live', exact: true }).click()
-    await expect(page).toHaveURL(/\/live/)
-    await expect(page.getByTestId('live-empty')).toBeVisible()
   })
 })

tests/race-hub.spec.ts

@@ -1,43 +1,8 @@
 import { test, expect } from '@playwright/test'
+import { FUTURE_SESSION, mockFutureRaceHubSession } from './fixtures/future-session'
 
 const FULL_SESSION = 9472
 const CORE_ONLY_SESSION = 9000
-const CONTEXT_MEETING = {
-  meeting_key: 1229,
-  meeting_name: 'Monaco',
-  country_code: 'MON',
-}
-const CONTEXT_AVAILABILITY = {
-  source: 'local', schedule: 'available', live_transport: 'unknown', live_session: 'inactive',
-  archive: 'unavailable', local_analysis: 'complete', freshness: 'local', limitations: [],
-}
-
-function completedContext(refreshAt?: string) {
-  return {
-    temporal_state: 'between_weekends',
-    race_hub_default_session: {
-      session: { session_key: FULL_SESSION }, meeting: CONTEXT_MEETING, availability: CONTEXT_AVAILABILITY,
-    },
-    race_hub_pre_session: false,
-    race_hub_refresh_at: refreshAt,
-  }
-}
-
-function pendingContext(refreshAt: string) {
-  return {
-    temporal_state: 'pre_session',
-    race_hub_default_session: {
-      session: {
-        session_key: 9473, meeting_key: 1229, session_name: 'Practice 1', session_type: 'Practice',
-        date_start: '2030-01-01T00:00:01Z', date_end: '2030-01-01T01:00:01Z', gmt_offset: '00:00:00',
-      },
-      meeting: CONTEXT_MEETING,
-      availability: { ...CONTEXT_AVAILABILITY, local_analysis: 'not_applicable' },
-    },
-    race_hub_pre_session: true,
-    race_hub_refresh_at: refreshAt,
-  }
-}
 
 test.describe('Race Hub Weekend Workspace', () => {
   test('lands on the Overview tab with workspace identity', async ({ page }) => {
@@ -51,6 +16,7 @@ test.describe('Race Hub Weekend Workspace', () => {
       'aria-selected',
       'true',
     )
+    await expect(page.getByText('Local Coverage')).toHaveCount(0)
   })
 
   test('shows final running order when switching to Race Story', async ({ page }) => {
@@ -123,102 +89,110 @@ test.describe('Race Hub Weekend Workspace', () => {
     await page.getByTestId('rh-switch-weekend').click()
 
     await expect(page.getByTestId('rh-switcher')).toBeVisible()
-    // Active session is already loaded; just confirm a session button is reachable
     await expect(page.getByTestId(`rh-switcher-session-${FULL_SESSION}`)).toBeVisible()
   })
 
-  test('Data Status tab points at admin instead of inline CLI hints', async ({ page }) => {
+  test('Diagnostics is a secondary action and points at admin, not inline CLI hints', async ({ page }) => {
     await page.goto(`/race-hub?session_key=${CORE_ONLY_SESSION}`)
-    await page.getByRole('tab', { name: 'Data Status' }).click()
+    await page.getByRole('tab', { name: 'Diagnostics' }).click()
 
     await expect(page.getByTestId('rh-data-status')).toBeVisible()
     await expect(page.getByRole('link', { name: /manage ingestion/i })).toHaveAttribute(
       'href',
       '/admin',
     )
+    await expect(page.getByTestId('rh-dataset-strip')).toHaveCount(0)
+    await page.getByTestId('rh-diagnostics-toggle').click()
+    await expect(page.getByTestId('rh-dataset-strip')).toBeVisible()
   })
 
-  test('bare /race-hub shows server-selected completed analysis without changing the URL', async ({ page }) => {
+  test('groups analysis navigation into Story, Analysis, and Data & Context', async ({ page }) => {
-    await page.route('**/api/v1/weekend-context', (route) =>
-      route.fulfill({ contentType: 'application/json', body: JSON.stringify(completedContext()) }),
-    )
-    await page.goto('/race-hub')
-    await expect(page).toHaveURL(/\/race-hub$/)
-    await expect(page.getByTestId('race-hub')).toBeVisible()
-  })
-
-  test('bare /race-hub hands off to pending pre-session state at the refresh deadline', async ({ page }) => {
-    await page.clock.install({ time: new Date('2030-01-01T00:00:00Z') })
-    let requests = 0
-    const raceHubRequests: number[] = []
-    page.on('request', (request) => {
-      const url = new URL(request.url())
-      if (url.pathname === '/api/v1/race-hub') {
-        raceHubRequests.push(Number(url.searchParams.get('session_key')))
-      }
-    })
-    await page.route('**/api/v1/weekend-context', (route) => {
-      requests += 1
-      const body = requests === 1
-        ? completedContext('2030-01-01T00:00:01Z')
-        : pendingContext('2030-01-01T00:00:16Z')
-      return route.fulfill({ contentType: 'application/json', body: JSON.stringify(body) })
-    })
-
-    await page.goto('/race-hub')
-    await expect(page.getByTestId('race-hub')).toBeVisible()
-    await page.clock.fastForward(1_000)
-
-    await expect(page.getByTestId('race-hub-pre-session')).toBeVisible()
-    await expect(page).toHaveURL(/\/race-hub$/)
-    expect(raceHubRequests).toContain(FULL_SESSION)
-    expect(raceHubRequests).not.toContain(9473)
-  })
-
-  test('pre-session state opens the weekend switcher and navigates to an explicit session', async ({ page }) => {
-    await page.route('**/api/v1/weekend-context', (route) =>
-      route.fulfill({
-        contentType: 'application/json',
-        body: JSON.stringify(pendingContext('2030-01-01T00:00:16Z')),
-      }),
-    )
-
-    await page.goto('/race-hub')
-    await expect(page.getByTestId('race-hub-pre-session')).toBeVisible()
-
-    const switchWeekend = page.getByTestId('rh-switch-weekend')
-    await expect(switchWeekend).toHaveAttribute('aria-expanded', 'false')
-    await switchWeekend.click()
-    await expect(page.getByTestId('rh-switcher')).toBeVisible()
-    await expect(switchWeekend).toHaveAttribute('aria-expanded', 'true')
-
-    await page.getByTestId(`rh-switcher-session-${FULL_SESSION}`).click()
-    await expect(page).toHaveURL(new RegExp(`/race-hub\\?session_key=${FULL_SESSION}`))
-    await expect(page.getByTestId('race-hub')).toBeVisible()
-  })
-
-  test('bare /race-hub recovers when no completed local analysis exists', async ({ page }) => {
-    await page.route('**/api/v1/weekend-context', (route) =>
-      route.fulfill({
-        contentType: 'application/json',
-        body: JSON.stringify({ temporal_state: 'between_weekends', race_hub_pre_session: false }),
-      }),
-    )
-
-    await page.goto('/race-hub')
-    await expect(page.getByTestId('race-hub-empty')).toContainText('No completed local analysis yet')
-  })
-
-  test('an explicit session URL remains stable when canonical context would refresh', async ({ page }) => {
-    let contextRequested = false
-    await page.route('**/api/v1/weekend-context', (route) => {
-      contextRequested = true
-      return route.fulfill({ contentType: 'application/json', body: JSON.stringify(pendingContext('2030-01-01T00:00:01Z')) })
-    })
-
     await page.goto(`/race-hub?session_key=${FULL_SESSION}`)
+    await expect(page.getByTestId('rh-tabgroup-story')).toBeVisible()
+    await expect(page.getByTestId('rh-tabgroup-analysis')).toBeVisible()
+    await expect(page.getByTestId('rh-tabgroup-context')).toBeVisible()
+  })
+
+  test('bare /race-hub resolves to a completed session via Weekend Context', async ({ page }) => {
+    await page.goto('/race-hub')
+    await expect(page).toHaveURL(/session_key=\d+/)
     await expect(page.getByTestId('race-hub')).toBeVisible()
     await expect(page).toHaveURL(new RegExp(`session_key=${FULL_SESSION}`))
-    expect(contextRequested).toBe(false)
+    await expect(page.getByTestId('rh-identity')).toContainText('Monaco')
+  })
+
+  test('explicit completed session deep link stays stable and shows analysis', async ({ page }) => {
+    await page.goto(`/race-hub?session_key=${FULL_SESSION}`)
+    await expect(page).toHaveURL(new RegExp(`session_key=${FULL_SESSION}`))
+    await expect(page.getByTestId('rh-overview')).toBeVisible()
+  })
+
+  test('explicit future session renders the pre-session view, not empty analysis', async ({
+    page,
+  }) => {
+    await mockFutureRaceHubSession(page)
+    await page.goto(`/race-hub?session_key=${FUTURE_SESSION}`)
+    await expect(page.getByTestId('race-hub')).toBeVisible()
+    await expect(page.getByTestId('rh-presession')).toBeVisible()
+    await expect(page.getByTestId('rh-overview')).toHaveCount(0)
+  })
+
+  test('returning to Weekend from analysis preserves meeting and session context', async ({
+    page,
+  }) => {
+    await page.goto(`/race-hub?session_key=${FULL_SESSION}`)
+    await expect(page.getByTestId('rh-identity')).toContainText('Monaco')
+    await page.getByRole('tab', { name: 'Strategy' }).click()
+    await expect(page.locator('[data-testid="strategy-chart"]')).toBeVisible()
+
+    // Navigate to the sibling core-only session within the same weekend.
+    await page.getByTestId(`rh-session-${CORE_ONLY_SESSION}`).click()
+    await expect(page).toHaveURL(new RegExp(`session_key=${CORE_ONLY_SESSION}`))
+    await expect(page.getByTestId('rh-identity')).toContainText('Monaco')
+
+    // Explicit Race Hub → Weekend return carries meeting/session in the URL.
+    const back = page.getByRole('link', { name: 'Back to Weekend' })
+    await expect(back).toBeVisible()
+    await expect(back).toHaveAttribute('href', /meeting_key=1229/)
+    await expect(back).toHaveAttribute('href', /session_key=9000/)
+    await back.click()
+
+    await expect(page).toHaveURL(/\/\?.*meeting_key=1229/)
+    await expect(page).toHaveURL(/session_key=9000/)
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
+    await expect(page.getByTestId('weekend-page')).toHaveAttribute('data-meeting-key', '1229')
+    await expect(page.getByTestId('weekend-page')).toHaveAttribute('data-session-key', '9000')
+    await expect(page.getByTestId('wk-focus-context')).toBeVisible()
+    await expect(page.getByTestId('wk-focus-meeting')).toContainText('Monaco')
+    await expect(page.getByTestId('wk-focus-session')).toContainText('Core Only')
+
+    // Contextual action returns to the exact selected analysis session.
+    const continueAnalysis = page.getByRole('link', { name: /Continue analysis/i })
+    await expect(continueAnalysis).toHaveAttribute(
+      'href',
+      new RegExp(`session_key=${CORE_ONLY_SESSION}`),
+    )
+    await continueAnalysis.click()
+    await expect(page).toHaveURL(new RegExp(`session_key=${CORE_ONLY_SESSION}`))
+    await expect(page.getByTestId('race-hub')).toBeVisible()
+    await expect(page.getByTestId('rh-identity')).toContainText('Monaco')
+  })
+
+  test('Back to Weekend is keyboard-focusable and works at mobile width', async ({ page }) => {
+    await page.setViewportSize({ width: 390, height: 844 })
+    await page.goto(`/race-hub?session_key=${CORE_ONLY_SESSION}`)
+    await expect(page.getByTestId('race-hub')).toBeVisible()
+
+    const back = page.getByRole('link', { name: 'Back to Weekend' })
+    await expect(back).toBeVisible()
+    await back.focus()
+    await expect(back).toBeFocused()
+    await page.keyboard.press('Enter')
+
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
+    await expect(page.getByTestId('weekend-page')).toHaveAttribute('data-meeting-key', '1229')
+    await expect(page.getByTestId('weekend-page')).toHaveAttribute('data-session-key', '9000')
+    await expect(page.getByTestId('wk-focus-context')).toBeVisible()
+    await expect(page.getByRole('link', { name: /Continue analysis/i })).toBeVisible()
   })
 })

tests/route-resilience.spec.ts

@@ -0,0 +1,42 @@
+import { test, expect } from '@playwright/test'
+
+test.describe('Primary-route resilience (forced errors)', () => {
+  test('Weekend leaves loading and shows retry after weekend-context failure', async ({
+    page,
+  }) => {
+    await page.route('**/api/v1/weekend-context', async (route) => {
+      await new Promise((r) => setTimeout(r, 50))
+      await route.fulfill({
+        status: 503,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'forced weekend-context failure', stale: false }),
+      })
+    })
+
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-error')).toBeVisible({ timeout: 15_000 })
+    await expect(page.getByRole('button', { name: 'Retry' })).toBeVisible()
+    await expect(page.getByTestId('weekend-error')).not.toHaveText(/API 503|forced weekend-context/i)
+  })
+
+  test('Driver Profile leaves loading and shows retry after summary timeout', async ({ page }) => {
+    await page.route('**/api/v1/driver/summary**', async (route) => {
+      // Hold the connection past the UI wait without fulfilling — the browser
+      // abort/timeout path is covered in unit tests; here we force an HTTP error
+      // so the shared RouteState recovery UI is exercised hermetically.
+      await route.fulfill({
+        status: 504,
+        contentType: 'application/json',
+        body: JSON.stringify({ error: 'forced timeout', stale: false }),
+      })
+    })
+    await page.route('**/api/v1/seasons', (route) =>
+      route.fulfill({ contentType: 'application/json', body: JSON.stringify([2025]) }),
+    )
+
+    await page.goto('/drivers/1?year=2025')
+    await expect(page.getByTestId('driver-profile-error')).toBeVisible({ timeout: 15_000 })
+    await expect(page.getByRole('button', { name: 'Retry' })).toBeVisible()
+    await expect(page.getByTestId('driver-profile-error')).not.toHaveText(/API 504/i)
+  })
+})