fix(#73): consume canonical Weekend Context contract and repair navigation

Address the independent review blockers on PR #80 after rebasing onto the
authoritative #72 Weekend Context API.

- Replace the invented frontend WeekendContext with the exact backend contract
  (temporal_state, previous/focus/next meetings, previous_completed/active/next/
  default_analysis sessions with availability). Every valid canonical payload now
  maps to a designed state via a total resolveViewState; a well-formed response
  can never fall through to the limited-data placeholder.
- Make the canonical read the single source of truth: useWeekendContext no longer
  fans out to season/meetings/per-weekend/OpenF1/live queries. Only supplementary
  championship + news reads run, and only once the canonical context resolves.
- Fix the Prepare/analysis flow: /preview is a stable alias that renders the
  preparation surface (PreSessionView) instead of redirecting back to the same
  between-races screen.
- One primary navigation system per breakpoint: the mobile top-bar links are
  hidden so the bottom bar is the sole primary nav, and Admin is moved out of
  every Primary landmark into an operator-utilities toolbar.
- Add Vitest coverage for the contract mapping, every temporal state, loading/
  error/limited surfaces, the no-fanout guarantee, the /preview CTA, and the nav
  hierarchy; add hermetic Playwright journeys (seeded + injected canonical
  payloads), 390/768/1440 overflow checks, and Weekend visual snapshots. Retire
  the stale Command Center specs/snapshots.

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

@@ -15,6 +15,7 @@ import type {
   Session,
   TrackOutline,
   Weekend,
+  WeekendContext,
 } from './types'
 
 export async function fetchRaceHub(sessionKey: number): Promise<RaceHub> {
@@ -114,6 +115,19 @@ export async function fetchWeekend(meetingKey: number): Promise<Weekend> {
   return res.json()
 }
 
+// fetchWeekendContext consumes the canonical /api/v1/weekend-context endpoint
+// (backend story #72). The response is the authoritative WeekendContext shape and
+// is used verbatim as the Weekend home's source of truth. Any HTTP error throws
+// so the hook can surface an explicit error state; there is no client-side
+// re-derivation of the contract.
+export async function fetchWeekendContext(): Promise<WeekendContext> {
+  const res = await fetch('/api/v1/weekend-context')
+  if (!res.ok) {
+    throw new Error(`API ${res.status}: ${res.statusText}`)
+  }
+  return res.json()
+}
+
 export async function fetchChampionshipHub(year?: number): Promise<ChampionshipHub> {
   const params = new URLSearchParams({ source: 'auto' })
   if (year) params.set('year', year.toString())

frontend/src/components/Nav.tsx

@@ -1,36 +1,66 @@
 import { Link } from '@tanstack/react-router'
+import { Compass, FileText, Home, Trophy } from 'lucide-react'
 
+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() {
   return (
-    <nav className="app-nav">
-      <Link to="/" className="nav-logo">
-        box<em>-</em>box
-      </Link>
-      <div className="nav-links">
-        <Link to="/" activeProps={{ className: 'active' }} activeOptions={{ exact: true }}>
-          Command
+    <>
+      <header className="app-nav">
+        <Link to="/" className="nav-logo">
+          box<em>-</em>box
         </Link>
-        <Link to="/live" activeProps={{ className: 'active' }}>
-          Live
-        </Link>
-        <Link to="/race-hub" search={{}} activeProps={{ className: 'active' }}>
-          Race Hub
-        </Link>
-        <Link to="/preview" activeProps={{ className: 'active' }}>
-          Preview
-        </Link>
-        <Link to="/championship" activeProps={{ className: '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>
-    </nav>
+        <nav className="nav-links" aria-label="Primary">
+          {PRIMARY.map(({ to, label, exact }) => (
+            <Link
+              key={to}
+              to={to}
+              activeProps={{ className: 'active' }}
+              activeOptions={exact ? { exact: true } : undefined}
+            >
+              {label}
+            </Link>
+          ))}
+        </nav>
+        <div className="nav-utility" role="toolbar" aria-label="Operator utilities">
+          <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/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 +1,83 @@
+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
+  const analysisKey = 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 +1,56 @@
+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'
+
+/**
+ * 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.
+ */
+export function PreSessionView({ context, now }: { context: WeekendContext; now: Date }) {
+  const meeting = meetingIdentity(context.next_meeting ?? context.focus_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>
+
+      {meeting && (
+        <header className="wk-pre-head" data-testid="wk-pre-head">
+          <div className="wk-event-id">
+            <Flag code={meeting.country_code} flag={meeting.country_flag} />
+            <h1 className="wk-sessions-title">{meeting.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 />
+      </div>
+
+      <ChampionshipRoundStrip
+        round={context.championship_round}
+        total={context.total_championship_rounds}
+      />
+    </div>
+  )
+}

frontend/src/components/weekend/StatusViews.tsx

@@ -0,0 +1,36 @@
+import { Link } from '@tanstack/react-router'
+
+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({ message }: { message?: string }) {
+  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">{message ?? 'Something went wrong loading the weekend context.'}</p>
+    </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/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 +1,89 @@
+import { useEffect, useMemo, useState } from 'react'
+import { useQuery } from '@tanstack/react-query'
+import { fetchChampionshipHub, fetchNews, fetchWeekendContext } from '../api'
+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[]
+  now: Date
+}
+
+/**
+ * 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: fetchWeekendContext,
+    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: () => fetchChampionshipHub(season),
+    enabled: canonicalReady,
+    staleTime: 60_000,
+  })
+
+  const newsQuery = useQuery({
+    queryKey: ['news', 6],
+    queryFn: () => fetchNews(6),
+    enabled: canonicalReady,
+    staleTime: 60_000,
+  })
+
+  const championship = useMemo(
+    () => championshipImpact(championshipQuery.data),
+    [championshipQuery.data],
+  )
+  const briefing = useMemo(() => briefingItems(newsQuery.data ?? []), [newsQuery.data])
+
+  let loadState: WeekendLoadState = 'loading'
+  if (contextQuery.isError) loadState = 'error'
+  else if (canonicalReady) loadState = 'ready'
+
+  return {
+    context: canonical,
+    loadState,
+    error: contextQuery.error instanceof Error ? contextQuery.error : undefined,
+    championship,
+    briefing,
+    now: nowDate,
+  }
+}

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/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/ExplorePage.tsx

@@ -0,0 +1,156 @@
+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: fetchSeasons })
+  const season = seasonsQuery.data?.[0] ?? null
+
+  const localMeetingsQuery = useQuery({
+    queryKey: ['meetings', season, 'local'],
+    queryFn: () => fetchLocalMeetings(season!),
+    enabled: season != null,
+  })
+  const seasonMeetingsQuery = useQuery({
+    queryKey: ['season-meetings', season],
+    queryFn: () => fetchSeasonMeetings(season!),
+    enabled: season != null,
+  })
+  const championshipQuery = useQuery({
+    queryKey: ['championship-hub', season],
+    queryFn: () => fetchChampionshipHub(season!),
+    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: () => fetchWeekend(m.meeting_key),
+      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/WeekendPage.tsx

@@ -0,0 +1,94 @@
+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 { 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
+}
+
+function renderState(view: WeekendViewState, args: RenderArgs) {
+  const { context, now, championship, briefing, preview } = 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} />
+  }
+
+  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} />
+    default:
+      return <WeekendLimited season={context.season} />
+  }
+}
+
+export function WeekendPage({ preview = false }: { preview?: boolean }) {
+  const { context, loadState, error, championship, briefing, now } = useWeekendContext()
+
+  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 message={error?.message} />
+      </main>
+    )
+  }
+
+  const view = resolveViewState(context)
+
+  return (
+    <main
+      className="wk-page"
+      data-testid="weekend-page"
+      data-state={view}
+      data-temporal-state={context.temporal_state}
+      data-preview={preview ? 'true' : undefined}
+    >
+      {renderState(view, { context, now, championship, briefing, preview })}
+    </main>
+  )
+}

frontend/src/router.tsx

@@ -1,13 +1,13 @@
 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'
 
 type RaceHubSearch = {
   session_key?: number
@@ -26,10 +26,17 @@ const rootRoute = createRootRoute({
   ),
 })
 
-export const commandCenterRoute = createRoute({
+// Weekend is the adaptive home. `/` renders the current temporal state.
+export const weekendRoute = createRoute({
   getParentRoute: () => rootRoute,
   path: '/',
-  component: CommandCenterPage,
+  component: WeekendPage,
+})
+
+export const exploreRoute = createRoute({
+  getParentRoute: () => rootRoute,
+  path: '/explore',
+  component: ExplorePage,
 })
 
 export const raceHubRoute = createRoute({
@@ -90,14 +97,21 @@ 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

@@ -142,6 +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;

frontend/src/styles/weekend.css

@@ -0,0 +1,378 @@
+/* ── Weekend adaptive home ── */
+.wk-page {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: var(--s6) var(--s6) 64px;
+  width: 100%;
+}
+
+.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-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-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/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/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/WeekendPage.test.tsx

@@ -0,0 +1,309 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
+import { render, screen, waitFor } 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'
+
+vi.mock('../api', () => ({
+  fetchWeekendContext: vi.fn(),
+  fetchChampionshipHub: vi.fn(),
+  fetchNews: vi.fn(),
+  fetchRaceHub: 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,
+  fetchSeasons,
+  fetchMeetings,
+  fetchSessions,
+  fetchResults,
+  fetchStartingGrid,
+  fetchTrackOutline,
+} from '../api'
+
+const mockContext = vi.mocked(fetchWeekendContext)
+const mockHub = vi.mocked(fetchChampionshipHub)
+const mockNews = vi.mocked(fetchNews)
+const mockRaceHub = vi.mocked(fetchRaceHub)
+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: '/', component: () => <WeekendPage /> })
+  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)
+    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())
+    expect(screen.getByTestId('weekend-error')).toHaveTextContent('boom')
+  })
+
+  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()
+  })
+})

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

@@ -448,6 +448,107 @@ export interface DriverSummary {
   rounds: DriverSummaryRound[]
 }
 
+// ── 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 {
+  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 {
   source: string
   title: string

internal/query/context.go

@@ -0,0 +1,435 @@
+package query
+
+import (
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/AmanTahiliani/box-box/internal/models"
+	"github.com/AmanTahiliani/box-box/internal/store"
+)
+
+// TemporalState describes where the fan is in the current season/weekend.
+type TemporalState string
+
+const (
+	TemporalNoSeason        TemporalState = "no_season"
+	TemporalBetweenWeekends TemporalState = "between_weekends"
+	TemporalPreSession      TemporalState = "pre_session"
+	TemporalSessionLive     TemporalState = "session_live"
+	TemporalSessionSettling TemporalState = "session_settling"
+	TemporalBetweenSessions TemporalState = "between_sessions"
+	TemporalPostWeekend     TemporalState = "post_weekend"
+	TemporalSeasonComplete  TemporalState = "season_complete"
+
+	preSessionWindow  = 48 * time.Hour
+	postWeekendWindow = 48 * time.Hour
+)
+
+// LiveEvidence is the small, transport-independent subset of FIA state needed
+// by the context resolver. Active identity is authoritative over the schedule.
+type LiveEvidence struct {
+	Active      bool
+	Final       bool
+	MeetingName string
+	CircuitName string
+	SessionName string
+	SessionType string
+	ObservedAt  time.Time
+}
+
+// ContextAvailability is structured source state for a referenced session.
+type ContextAvailability struct {
+	Schedule      string   `json:"schedule"`
+	LiveTransport string   `json:"live_transport"`
+	LiveSession   string   `json:"live_session"`
+	Archive       string   `json:"archive"`
+	LocalAnalysis string   `json:"local_analysis"`
+	Freshness     string   `json:"freshness"`
+	ObservedAt    string   `json:"observed_at,omitempty"`
+	Limitations   []string `json:"limitations"`
+}
+
+// ContextSession couples a session identity with its availability contract.
+type ContextSession struct {
+	Session      models.Session      `json:"session"`
+	Meeting      *models.Meeting     `json:"meeting,omitempty"`
+	Availability ContextAvailability `json:"availability"`
+}
+
+// WeekendContext is the canonical local-first previous/current/next model.
+type WeekendContext struct {
+	Season                   int             `json:"season,omitempty"`
+	TemporalState            TemporalState   `json:"temporal_state"`
+	PreviousMeeting          *models.Meeting `json:"previous_meeting,omitempty"`
+	FocusMeeting             *models.Meeting `json:"focus_meeting,omitempty"`
+	NextMeeting              *models.Meeting `json:"next_meeting,omitempty"`
+	PreviousCompletedSession *ContextSession `json:"previous_completed_session,omitempty"`
+	ActiveSession            *ContextSession `json:"active_session,omitempty"`
+	NextSession              *ContextSession `json:"next_session,omitempty"`
+	DefaultAnalysisSession   *ContextSession `json:"default_analysis_session,omitempty"`
+	ChampionshipRound        int             `json:"championship_round"`
+	TotalChampionshipRounds  int             `json:"total_championship_rounds"`
+}
+
+type contextCandidate struct {
+	meeting  store.Meeting
+	session  store.Session
+	start    time.Time
+	end      time.Time
+	counts   store.SessionDatasetCounts
+	complete bool
+	archived bool
+}
+
+// ResolveWeekendContext computes the canonical context using only the domain
+// store, the service clock, and optional in-memory FIA evidence.
+func (s *Service) ResolveWeekendContext(evidence LiveEvidence) (WeekendContext, error) {
+	now := s.now().UTC()
+	out := WeekendContext{TemporalState: TemporalNoSeason}
+	years, err := s.store.ListYears()
+	if err != nil || len(years) == 0 {
+		return out, err
+	}
+	out.Season = currentLocalSeason(years, now.Year())
+	meetings, err := s.store.ListMeetingsByYear(out.Season)
+	if err != nil {
+		return WeekendContext{}, err
+	}
+	if len(meetings) == 0 {
+		return out, nil
+	}
+
+	byMeeting := make(map[int][]store.Session, len(meetings))
+	var candidates []contextCandidate
+	for i := range meetings {
+		m := meetings[i]
+		sessions, listErr := s.store.ListSessionsByMeeting(m.MeetingKey)
+		if listErr != nil {
+			return WeekendContext{}, listErr
+		}
+		byMeeting[m.MeetingKey] = sessions
+		applySessionDisplayRange(&meetings[i], sessions)
+		m = meetings[i]
+		for _, sess := range sessions {
+			if m.IsCancelled || sess.IsCancelled {
+				continue
+			}
+			start, _ := parseContextTime(sess.DateStart)
+			end, _ := parseContextTime(sess.DateEnd)
+			if end.IsZero() && !start.IsZero() {
+				end = start.Add(3 * time.Hour)
+			}
+			counts, countErr := s.store.CountSessionDatasets(sess.SessionKey)
+			if countErr != nil {
+				return WeekendContext{}, countErr
+			}
+			archived := evidence.Final && liveMatches(evidence, m, sess)
+			candidates = append(candidates, contextCandidate{
+				meeting: m, session: sess, start: start, end: end, counts: counts,
+				complete: hasMeaningfulAnalysis(counts) || archived, archived: archived,
+			})
+		}
+	}
+	sort.SliceStable(candidates, func(i, j int) bool { return candidates[i].start.Before(candidates[j].start) })
+
+	champMeetings := championshipMeetings(meetings, byMeeting)
+	out.TotalChampionshipRounds = len(champMeetings)
+
+	var active *contextCandidate
+	if evidence.Active {
+		for i := range candidates {
+			if liveMatches(evidence, candidates[i].meeting, candidates[i].session) {
+				active = &candidates[i]
+				break
+			}
+		}
+		if active == nil {
+			active = syntheticLiveCandidate(evidence, now)
+		}
+	}
+
+	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
+		completionEligible := c.start.IsZero() || !c.start.After(now) || c.archived
+		if !isActive && c.complete && completionEligible && (previous == nil || candidateTime(*c).After(candidateTime(*previous))) {
+			previous = c
+		}
+		if !isActive && c.complete && hasMeaningfulAnalysis(c.counts) && (c.start.IsZero() || !c.start.After(now)) && (defaultAnalysis == nil || candidateTime(*c).After(candidateTime(*defaultAnalysis))) {
+			defaultAnalysis = c
+		}
+		if !isActive && !c.start.IsZero() && !c.start.Before(now) && (next == nil || c.start.Before(next.start)) {
+			next = c
+		}
+	}
+
+	if previous != nil {
+		out.PreviousCompletedSession = sessionRef(*previous, evidence, now)
+		out.PreviousMeeting = meetingModelByKey(meetings, previous.meeting.MeetingKey)
+	}
+	if defaultAnalysis != nil {
+		out.DefaultAnalysisSession = sessionRef(*defaultAnalysis, evidence, now)
+	}
+	if next != nil {
+		out.NextSession = sessionRef(*next, evidence, now)
+		out.NextMeeting = meetingModelByKey(meetings, next.meeting.MeetingKey)
+	}
+	if active != nil {
+		out.ActiveSession = sessionRef(*active, evidence, now)
+		out.FocusMeeting = out.ActiveSession.Meeting
+		out.TemporalState = TemporalSessionLive
+	} else {
+		out.FocusMeeting = chooseFocusMeeting(meetings, previous, next)
+		out.TemporalState = classifyTemporalState(now, previous, next, candidates, champMeetings, championshipScheduleUnknown(champMeetings, byMeeting))
+	}
+	if out.FocusMeeting != nil {
+		out.ChampionshipRound = championshipRound(champMeetings, int(out.FocusMeeting.MeetingKey))
+	}
+	return out, nil
+}
+
+func currentLocalSeason(years []int, current int) int {
+	for _, year := range years {
+		if year == current {
+			return year
+		}
+	}
+	for _, year := range years {
+		if year < current {
+			return year
+		}
+	}
+	return years[len(years)-1]
+}
+
+func parseContextTime(value string) (time.Time, bool) {
+	if value == "" {
+		return time.Time{}, false
+	}
+	for _, layout := range []string{time.RFC3339Nano, time.RFC3339, "2006-01-02T15:04:05"} {
+		if parsed, err := time.Parse(layout, value); err == nil {
+			return parsed.UTC(), true
+		}
+	}
+	return time.Time{}, false
+}
+
+func hasMeaningfulAnalysis(c store.SessionDatasetCounts) bool {
+	return c.Results > 0 || c.Laps > 0 || c.Stints > 0 || c.Positions > 0 || c.RaceControl > 0
+}
+
+func candidateTime(c contextCandidate) time.Time {
+	if !c.end.IsZero() {
+		return c.end
+	}
+	return c.start
+}
+
+func liveMatches(e LiveEvidence, m store.Meeting, s store.Session) bool {
+	meetingMatch := normalizedContains(e.MeetingName, m.MeetingName) || normalizedContains(e.CircuitName, m.CircuitShortName)
+	sessionMatch := normalizedEqual(e.SessionName, s.SessionName)
+	if normalizeIdentity(e.SessionName) == "" {
+		sessionMatch = normalizedEqual(e.SessionType, s.SessionType)
+	}
+	return meetingMatch && sessionMatch
+}
+
+func normalizedEqual(a, b string) bool {
+	return normalizeIdentity(a) != "" && normalizeIdentity(a) == normalizeIdentity(b)
+}
+func normalizedContains(a, b string) bool {
+	a, b = normalizeIdentity(a), normalizeIdentity(b)
+	return a != "" && b != "" && (strings.Contains(a, b) || strings.Contains(b, a))
+}
+func normalizeIdentity(v string) string {
+	return strings.Map(func(r rune) rune {
+		if r >= 'A' && r <= 'Z' {
+			return r + ('a' - 'A')
+		}
+		if (r >= 'a' && r <= 'z') || (r >= '0' && r <= '9') {
+			return r
+		}
+		return -1
+	}, v)
+}
+
+func syntheticLiveCandidate(e LiveEvidence, now time.Time) *contextCandidate {
+	return &contextCandidate{meeting: store.Meeting{MeetingName: e.MeetingName, CircuitShortName: e.CircuitName}, session: store.Session{SessionName: e.SessionName, SessionType: e.SessionType, DateStart: now.Format(time.RFC3339)}, start: now}
+}
+
+func applySessionDisplayRange(m *store.Meeting, sessions []store.Session) {
+	var first, last time.Time
+	for _, sess := range sessions {
+		if sess.IsCancelled {
+			continue
+		}
+		start, ok := parseContextTime(sess.DateStart)
+		if ok && (first.IsZero() || start.Before(first)) {
+			first = start
+		}
+		end, ok := parseContextTime(sess.DateEnd)
+		if !ok {
+			end = start
+		}
+		if !end.IsZero() && (last.IsZero() || end.After(last)) {
+			last = end
+		}
+	}
+	if !first.IsZero() {
+		m.DateStart = first.Format(time.RFC3339)
+	}
+	if !last.IsZero() {
+		m.DateEnd = last.Format(time.RFC3339)
+	}
+}
+
+func meetingModelByKey(meetings []store.Meeting, key int) *models.Meeting {
+	for _, meeting := range meetings {
+		if meeting.MeetingKey == key {
+			model := meetingToModel(meeting)
+			return &model
+		}
+	}
+	return nil
+}
+
+func sessionRef(c contextCandidate, evidence LiveEvidence, now time.Time) *ContextSession {
+	session := sessionToModel(c.session)
+	meeting := meetingToModel(c.meeting)
+	availability := ContextAvailability{Schedule: "available", LiveSession: "inactive", Archive: "unavailable", Freshness: "fresh", Limitations: []string{}}
+	availability.LiveTransport = "unknown"
+	if c.session.SessionKey == 0 {
+		availability.Schedule = "unavailable"
+		availability.Limitations = append(availability.Limitations, "schedule_identity_unmatched")
+	}
+	if evidence.Active && liveMatches(evidence, c.meeting, c.session) {
+		availability.LiveTransport = "connected"
+		availability.LiveSession = "active"
+		if !evidence.ObservedAt.IsZero() {
+			availability.ObservedAt = evidence.ObservedAt.Format(time.RFC3339)
+		}
+	}
+	if c.archived {
+		availability.Archive = "available"
+		if !evidence.ObservedAt.IsZero() {
+			availability.ObservedAt = evidence.ObservedAt.Format(time.RFC3339)
+		}
+	}
+	if c.counts.Results > 0 && (c.counts.Laps+c.counts.Stints+c.counts.Positions+c.counts.RaceControl > 0) {
+		availability.LocalAnalysis = "complete"
+	} else if hasMeaningfulAnalysis(c.counts) || c.counts.Drivers+c.counts.StartingGrid+c.counts.Weather > 0 {
+		availability.LocalAnalysis = "partial"
+	} else if !c.start.IsZero() && c.start.After(now) {
+		availability.LocalAnalysis = "not_applicable"
+	} else {
+		availability.LocalAnalysis = "pending"
+	}
+	return &ContextSession{Session: session, Meeting: &meeting, Availability: availability}
+}
+
+func chooseFocusMeeting(meetings []store.Meeting, previous, next *contextCandidate) *models.Meeting {
+	if next != nil {
+		return meetingModelByKey(meetings, next.meeting.MeetingKey)
+	}
+	if previous != nil {
+		return meetingModelByKey(meetings, previous.meeting.MeetingKey)
+	}
+	return nil
+}
+
+func classifyTemporalState(now time.Time, previous, next *contextCandidate, candidates []contextCandidate, championship []store.Meeting, scheduleUnknown bool) TemporalState {
+	var latestStarted *contextCandidate
+	for i := range candidates {
+		if !candidates[i].start.IsZero() && !candidates[i].start.After(now) && (latestStarted == nil || candidates[i].start.After(latestStarted.start)) {
+			latestStarted = &candidates[i]
+		}
+	}
+	// Once a new meeting enters its preparation window, an ingest gap from an
+	// older meeting must not keep the product stuck in settling.
+	if next != nil && next.start.Sub(now) <= preSessionWindow && (latestStarted == nil || latestStarted.meeting.MeetingKey != next.meeting.MeetingKey) {
+		return TemporalPreSession
+	}
+	if latestStarted != nil && !latestStarted.complete && !latestStarted.end.IsZero() {
+		if now.Before(latestStarted.end) {
+			return TemporalPreSession
+		}
+		return TemporalSessionSettling
+	}
+	if previous != nil && next != nil && previous.meeting.MeetingKey == next.meeting.MeetingKey {
+		return TemporalBetweenSessions
+	}
+	if previous != nil && meetingFinalSession(*previous, candidates) && !candidateTime(*previous).After(now) && now.Sub(candidateTime(*previous)) <= postWeekendWindow {
+		return TemporalPostWeekend
+	}
+	if next != nil && next.start.Sub(now) <= preSessionWindow {
+		return TemporalPreSession
+	}
+	if next == nil && len(championship) > 0 && !scheduleUnknown {
+		return TemporalSeasonComplete
+	}
+	return TemporalBetweenWeekends
+}
+
+func championshipScheduleUnknown(meetings []store.Meeting, sessions map[int][]store.Session) bool {
+	for _, meeting := range meetings {
+		for _, session := range sessions[meeting.MeetingKey] {
+			if !session.IsCancelled && isChampionshipRace(session) {
+				if _, ok := parseContextTime(session.DateStart); !ok {
+					return true
+				}
+			}
+		}
+	}
+	return false
+}
+
+func meetingFinalSession(previous contextCandidate, candidates []contextCandidate) bool {
+	latest := previous.start
+	for _, c := range candidates {
+		if c.meeting.MeetingKey == previous.meeting.MeetingKey && c.start.After(latest) {
+			return false
+		}
+	}
+	return true
+}
+
+func championshipMeetings(meetings []store.Meeting, sessions map[int][]store.Session) []store.Meeting {
+	var out []store.Meeting
+	for _, m := range meetings {
+		if m.IsCancelled || isTestMeeting(m) {
+			continue
+		}
+		for _, sess := range sessions[m.MeetingKey] {
+			if !sess.IsCancelled && isChampionshipRace(sess) {
+				out = append(out, m)
+				break
+			}
+		}
+	}
+	sort.SliceStable(out, func(i, j int) bool {
+		a, _ := parseContextTime(out[i].DateStart)
+		b, _ := parseContextTime(out[j].DateStart)
+		return a.Before(b)
+	})
+	return out
+}
+
+func isTestMeeting(m store.Meeting) bool {
+	n := strings.ToLower(m.MeetingName + " " + m.MeetingOfficialName)
+	return strings.Contains(n, "test")
+}
+func isChampionshipRace(s store.Session) bool {
+	n := strings.ToLower(s.SessionName)
+	t := strings.ToLower(s.SessionType)
+	return (n == "race" || t == "race") && !strings.Contains(n, "sprint") && !strings.Contains(t, "sprint")
+}
+func championshipRound(meetings []store.Meeting, key int) int {
+	for i, m := range meetings {
+		if m.MeetingKey == key {
+			return i + 1
+		}
+	}
+	return 0
+}

internal/query/context_test.go

@@ -0,0 +1,321 @@
+package query
+
+import (
+	"testing"
+	"time"
+
+	"github.com/AmanTahiliani/box-box/internal/store"
+)
+
+func contextService(t *testing.T, now time.Time) *Service {
+	t.Helper()
+	base := openTestService(t)
+	return NewServiceWithClock(base.store, func() time.Time { return now })
+}
+
+func addContextMeeting(t *testing.T, svc *Service, key int, name, start, end string, cancelled bool) {
+	t.Helper()
+	if err := svc.store.UpsertMeeting(store.Meeting{MeetingKey: key, MeetingName: name, MeetingOfficialName: name, CircuitShortName: name, Year: 2026, DateStart: start, DateEnd: end, IsCancelled: cancelled}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func addContextSession(t *testing.T, svc *Service, key, meeting int, name, start, end string, cancelled bool) {
+	t.Helper()
+	if err := svc.store.UpsertSession(store.Session{SessionKey: key, MeetingKey: meeting, SessionName: name, SessionType: name, DateStart: start, DateEnd: end, IsCancelled: cancelled}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func completeContextSession(t *testing.T, svc *Service, key, meeting int) {
+	t.Helper()
+	if err := svc.store.UpsertSessionResult(store.SessionResult{SessionKey: key, MeetingKey: meeting, DriverNumber: 1, Position: 1}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestResolveWeekendContextTemporalStates(t *testing.T) {
+	tests := []struct {
+		name     string
+		now      string
+		seed     func(*testing.T, *Service)
+		evidence LiveEvidence
+		want     TemporalState
+	}{
+		{name: "no season", now: "2026-06-01T12:00:00Z", want: TemporalNoSeason},
+		{name: "between weekends", now: "2026-06-10T12:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 1, "Monaco Grand Prix", "2026-06-01T09:00:00Z", "2026-06-02T16:00:00Z", false)
+			addContextSession(t, s, 11, 1, "Race", "2026-06-02T14:00:00Z", "2026-06-02T16:00:00Z", false)
+			completeContextSession(t, s, 11, 1)
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 21, 2, "Practice 1", "2026-06-20T09:00:00Z", "2026-06-20T10:00:00Z", false)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+		}, want: TemporalBetweenWeekends},
+		{name: "pre session", now: "2026-06-19T12:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 21, 2, "Practice 1", "2026-06-20T09:00:00Z", "2026-06-20T10:00:00Z", false)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+		}, want: TemporalPreSession},
+		{name: "session live overrides schedule", now: "2026-06-20T12:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 21, 2, "Practice 1", "2026-06-20T09:00:00Z", "2026-06-20T10:00:00Z", false)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+		}, evidence: LiveEvidence{Active: true, MeetingName: "Canadian Grand Prix", CircuitName: "Canada Grand Prix", SessionName: "Practice 1", SessionType: "Practice 1"}, want: TemporalSessionLive},
+		{name: "session settling", now: "2026-06-20T11:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 21, 2, "Practice 1", "2026-06-20T09:00:00Z", "2026-06-20T10:00:00Z", false)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+		}, want: TemporalSessionSettling},
+		{name: "between sessions", now: "2026-06-20T11:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 21, 2, "Practice 1", "2026-06-20T09:00:00Z", "2026-06-20T10:00:00Z", false)
+			completeContextSession(t, s, 21, 2)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+		}, want: TemporalBetweenSessions},
+		{name: "post weekend", now: "2026-06-22T18:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+			completeContextSession(t, s, 22, 2)
+		}, want: TemporalPostWeekend},
+		{name: "season complete", now: "2026-06-30T12:00:00Z", seed: func(t *testing.T, s *Service) {
+			addContextMeeting(t, s, 2, "Canada Grand Prix", "2026-06-20T09:00:00Z", "2026-06-22T16:00:00Z", false)
+			addContextSession(t, s, 22, 2, "Race", "2026-06-22T14:00:00Z", "2026-06-22T16:00:00Z", false)
+			completeContextSession(t, s, 22, 2)
+		}, want: TemporalSeasonComplete},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			now, _ := time.Parse(time.RFC3339, tt.now)
+			svc := contextService(t, now)
+			if tt.seed != nil {
+				tt.seed(t, svc)
+			}
+			got, err := svc.ResolveWeekendContext(tt.evidence)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if got.TemporalState != tt.want {
+				t.Fatalf("state = %s, want %s; context=%+v", got.TemporalState, tt.want, got)
+			}
+		})
+	}
+}
+
+func TestResolveWeekendContextTruthRules(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-10T12:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "Pre-Season Testing", "2026-02-01T00:00:00Z", "2026-02-03T00:00:00Z", false)
+	addContextSession(t, svc, 10, 1, "Race", "2026-02-03T10:00:00Z", "2026-02-03T12:00:00Z", false)
+	addContextMeeting(t, svc, 2, "Cancelled Grand Prix", "2026-03-01T00:00:00Z", "2026-03-03T00:00:00Z", true)
+	addContextSession(t, svc, 20, 2, "Race", "2026-03-03T10:00:00Z", "2026-03-03T12:00:00Z", false)
+	addContextMeeting(t, svc, 3, "British Grand Prix", "2026-07-01T00:00:00Z", "2026-07-05T00:00:00Z", false)
+	addContextSession(t, svc, 30, 3, "Practice 1", "2026-07-03T09:00:00Z", "2026-07-03T10:00:00Z", false)
+	addContextSession(t, svc, 31, 3, "Sprint", "2026-07-04T10:00:00Z", "2026-07-04T11:00:00Z", false)
+	addContextSession(t, svc, 32, 3, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+	completeContextSession(t, svc, 32, 3)
+	addContextMeeting(t, svc, 4, "Belgian Grand Prix", "2026-07-16T00:00:00Z", "2026-07-18T00:00:00Z", false)
+	addContextSession(t, svc, 40, 4, "Practice 1", "2026-07-17T09:00:00Z", "2026-07-17T10:00:00Z", false)
+	addContextSession(t, svc, 41, 4, "Cancelled Practice", "2026-07-18T09:00:00Z", "2026-07-18T10:00:00Z", true)
+	addContextSession(t, svc, 42, 4, "Race", "2026-07-19T14:00:00Z", "2026-07-19T16:00:00Z", false)
+
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.TotalChampionshipRounds != 2 || got.ChampionshipRound != 2 {
+		t.Fatalf("rounds = %d/%d, want 2/2", got.ChampionshipRound, got.TotalChampionshipRounds)
+	}
+	if got.DefaultAnalysisSession == nil || got.DefaultAnalysisSession.Session.SessionKey != 32 {
+		t.Fatalf("default analysis = %+v, want completed race 32", got.DefaultAnalysisSession)
+	}
+	if got.NextSession == nil || got.NextSession.Session.SessionKey != 40 {
+		t.Fatalf("next = %+v, want 40", got.NextSession)
+	}
+	if got.NextMeeting.DateStart != "2026-07-17T09:00:00Z" || got.NextMeeting.DateEnd != "2026-07-19T16:00:00Z" {
+		t.Fatalf("display range = %s..%s", got.NextMeeting.DateStart, got.NextMeeting.DateEnd)
+	}
+}
+
+func TestResolveWeekendContextPassedTimeDoesNotCompleteSession(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-05T18:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T00:00:00Z", "2026-07-05T16:00:00Z", false)
+	addContextSession(t, svc, 11, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.PreviousCompletedSession != nil || got.DefaultAnalysisSession != nil {
+		t.Fatalf("passed schedule was treated complete: %+v", got)
+	}
+	archive, err := svc.ResolveWeekendContext(LiveEvidence{Final: true, MeetingName: "British Grand Prix", CircuitName: "British Grand Prix", SessionName: "Race", SessionType: "Race", ObservedAt: now})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if archive.PreviousCompletedSession == nil || archive.PreviousCompletedSession.Availability.Archive != "available" {
+		t.Fatalf("final archive not used: %+v", archive)
+	}
+	if archive.DefaultAnalysisSession != nil {
+		t.Fatal("archive without local analysis must not become default analysis")
+	}
+}
+
+func TestResolveWeekendContextNeverUsesFutureAnalysis(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-01T12:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T00:00:00Z", "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) // bad/preloaded data must not make a future session canonical
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.PreviousCompletedSession != nil || got.DefaultAnalysisSession != nil {
+		t.Fatalf("future analysis selected: %+v", got)
+	}
+}
+
+func TestResolveWeekendContextSprintWeekendHandoff(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-04T12:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "2026-07-05T16:00:00Z", false)
+	addContextSession(t, svc, 11, 1, "Sprint", "2026-07-04T10:00:00Z", "2026-07-04T11:00:00Z", false)
+	addContextSession(t, svc, 12, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+	completeContextSession(t, svc, 11, 1)
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.TemporalState != TemporalBetweenSessions || got.PreviousCompletedSession.Session.SessionKey != 11 || got.NextSession.Session.SessionKey != 12 {
+		t.Fatalf("sprint handoff = %+v", got)
+	}
+	if got.TotalChampionshipRounds != 1 {
+		t.Fatalf("sprint created extra championship round: %d", got.TotalChampionshipRounds)
+	}
+}
+
+func TestResolveWeekendContextBoundaryTimestamps(t *testing.T) {
+	t.Run("pre-session window is inclusive", func(t *testing.T) {
+		now, _ := time.Parse(time.RFC3339, "2026-07-01T09:00:00Z")
+		svc := contextService(t, now)
+		addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "2026-07-05T16:00:00Z", false)
+		addContextSession(t, svc, 11, 1, "Practice 1", "2026-07-03T09:00:00Z", "2026-07-03T10:00:00Z", false)
+		addContextSession(t, svc, 12, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+		got, err := svc.ResolveWeekendContext(LiveEvidence{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if got.TemporalState != TemporalPreSession {
+			t.Fatalf("state = %s", got.TemporalState)
+		}
+	})
+	t.Run("scheduled end enters settling", func(t *testing.T) {
+		now, _ := time.Parse(time.RFC3339, "2026-07-03T10:00:00Z")
+		svc := contextService(t, now)
+		addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "2026-07-05T16:00:00Z", false)
+		addContextSession(t, svc, 11, 1, "Practice 1", "2026-07-03T09:00:00Z", "2026-07-03T10:00:00Z", false)
+		addContextSession(t, svc, 12, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+		got, err := svc.ResolveWeekendContext(LiveEvidence{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if got.TemporalState != TemporalSessionSettling {
+			t.Fatalf("state = %s", got.TemporalState)
+		}
+	})
+	t.Run("post-weekend window is inclusive", func(t *testing.T) {
+		now, _ := time.Parse(time.RFC3339, "2026-07-07T16:00:00Z")
+		svc := contextService(t, now)
+		addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "2026-07-05T16:00:00Z", false)
+		addContextSession(t, svc, 12, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+		completeContextSession(t, svc, 12, 1)
+		got, err := svc.ResolveWeekendContext(LiveEvidence{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		if got.TemporalState != TemporalPostWeekend {
+			t.Fatalf("state = %s", got.TemporalState)
+		}
+	})
+}
+
+func TestResolveWeekendContextPartialFutureSchedule(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-01T12:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "", false)
+	addContextSession(t, svc, 11, 1, "Practice 1", "", "", false)
+	addContextSession(t, svc, 12, 1, "Race", "2026-07-05T14:00:00Z", "", false)
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.NextSession == nil || got.NextSession.Session.SessionKey != 12 {
+		t.Fatalf("partial schedule next = %+v", got.NextSession)
+	}
+	if got.FocusMeeting == nil || got.FocusMeeting.DateStart != "2026-07-05T14:00:00Z" || got.FocusMeeting.DateEnd != "2026-07-05T14:00:00Z" {
+		t.Fatalf("partial display range = %+v", got.FocusMeeting)
+	}
+}
+
+func TestResolveWeekendContextActiveSessionIsNotCompletedOrDefault(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-05T15:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "British Grand Prix", "2026-07-03T09:00:00Z", "2026-07-05T16:00:00Z", false)
+	addContextSession(t, svc, 10, 1, "Qualifying", "2026-07-04T14:00:00Z", "2026-07-04T15:00:00Z", false)
+	completeContextSession(t, svc, 10, 1)
+	addContextSession(t, svc, 11, 1, "Race", "2026-07-05T14:00:00Z", "2026-07-05T16:00:00Z", false)
+	completeContextSession(t, svc, 11, 1)
+
+	got, err := svc.ResolveWeekendContext(LiveEvidence{Active: true, MeetingName: "British Grand Prix", CircuitName: "British Grand Prix", SessionName: "Race", SessionType: "Race", ObservedAt: now})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.ActiveSession == nil || got.ActiveSession.Session.SessionKey != 11 {
+		t.Fatalf("active = %+v", got.ActiveSession)
+	}
+	if got.PreviousCompletedSession == nil || got.PreviousCompletedSession.Session.SessionKey != 10 {
+		t.Fatalf("previous = %+v, want earlier completed session", got.PreviousCompletedSession)
+	}
+	if got.DefaultAnalysisSession == nil || got.DefaultAnalysisSession.Session.SessionKey != 10 {
+		t.Fatalf("default = %+v, want earlier completed session", got.DefaultAnalysisSession)
+	}
+}
+
+func TestResolveWeekendContextOldIncompleteSessionDoesNotSuppressNextWeekend(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-16T12:00:00Z")
+	svc := contextService(t, now)
+	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)
+	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)
+	addContextSession(t, svc, 22, 2, "Race", "2026-07-19T14:00:00Z", "2026-07-19T16:00:00Z", false)
+
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.TemporalState != TemporalPreSession {
+		t.Fatalf("state = %s, want %s; context=%+v", got.TemporalState, TemporalPreSession, got)
+	}
+	if got.FocusMeeting == nil || got.FocusMeeting.MeetingKey != 2 {
+		t.Fatalf("focus = %+v, want Belgian weekend", got.FocusMeeting)
+	}
+}
+
+func TestResolveWeekendContextMissingScheduleDoesNotClaimSeasonComplete(t *testing.T) {
+	now, _ := time.Parse(time.RFC3339, "2026-07-01T12:00:00Z")
+	svc := contextService(t, now)
+	addContextMeeting(t, svc, 1, "British Grand Prix", "", "", false)
+	addContextSession(t, svc, 11, 1, "Race", "", "", false)
+
+	got, err := svc.ResolveWeekendContext(LiveEvidence{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got.TemporalState != TemporalBetweenWeekends {
+		t.Fatalf("state = %s, want limited %s context", got.TemporalState, TemporalBetweenWeekends)
+	}
+	if got.TotalChampionshipRounds != 1 {
+		t.Fatalf("total rounds = %d, want scheduled round retained", got.TotalChampionshipRounds)
+	}
+}

internal/query/racehub.go

@@ -3,6 +3,7 @@ package query
 import (
 	"database/sql"
 	"errors"
+	"time"
 
 	"github.com/AmanTahiliani/box-box/internal/chapters"
 	"github.com/AmanTahiliani/box-box/internal/models"
@@ -12,11 +13,20 @@ import (
 // Service assembles store-backed read models.
 type Service struct {
 	store *store.Store
+	now   func() time.Time
 }
 
 // NewService creates a query service over a domain store.
 func NewService(st *store.Store) *Service {
-	return &Service{store: st}
+	return NewServiceWithClock(st, time.Now)
+}
+
+// NewServiceWithClock creates a query service with an injected clock.
+func NewServiceWithClock(st *store.Store, now func() time.Time) *Service {
+	if now == nil {
+		now = time.Now
+	}
+	return &Service{store: st, now: now}
 }
 
 // EnrichedResult is a session result with driver identity fields.

internal/web/context.go

@@ -0,0 +1,52 @@
+package web
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/AmanTahiliani/box-box/internal/live"
+	"github.com/AmanTahiliani/box-box/internal/query"
+)
+
+func (s *Server) handleWeekendContext(w http.ResponseWriter, _ *http.Request) {
+	if !s.hasLocalQuery() {
+		writeJSON(w, query.WeekendContext{TemporalState: query.TemporalNoSeason})
+		return
+	}
+
+	state := s.hub.State()
+	evidence := query.LiveEvidence{}
+	if state.IsLive && state.Data != nil {
+		evidence = liveEvidence(state.Data, true, false)
+	} else if state.LastSnapshot != nil && terminalSessionStatus(state.LastSnapshot.SessionStatus) {
+		evidence = liveEvidence(state.LastSnapshot, false, true)
+		if state.LastSnapshotAt != nil {
+			evidence.ObservedAt = *state.LastSnapshotAt
+		}
+	}
+	context, err := s.query.ResolveWeekendContext(evidence)
+	if err != nil {
+		writeError(w, err, http.StatusInternalServerError, false)
+		return
+	}
+	writeJSON(w, context)
+}
+
+func liveEvidence(data *live.LiveStreamData, active, final bool) query.LiveEvidence {
+	return query.LiveEvidence{Active: active, Final: final, MeetingName: data.Session.MeetingName, CircuitName: data.Session.CircuitName, SessionName: data.Session.SessionName, SessionType: data.Session.SessionType}
+}
+
+func terminalSessionStatus(status string) bool {
+	normalized := strings.ToLower(strings.Map(func(r rune) rune {
+		if (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') {
+			return r
+		}
+		return -1
+	}, status))
+	switch normalized {
+	case "finished", "finalised", "finalized", "ended", "aborted":
+		return true
+	default:
+		return false
+	}
+}

internal/web/context_test.go

@@ -0,0 +1,113 @@
+package web
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/AmanTahiliani/box-box/internal/live"
+	"github.com/AmanTahiliani/box-box/internal/query"
+	"github.com/AmanTahiliani/box-box/internal/store"
+)
+
+func openContextStore(t *testing.T) *store.Store {
+	t.Helper()
+	st, err := store.Open(filepath.Join(t.TempDir(), "context.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = st.Close() })
+	return st
+}
+
+func seedContextHandler(t *testing.T, st *store.Store) {
+	t.Helper()
+	if err := st.UpsertMeeting(store.Meeting{MeetingKey: 1, MeetingName: "British Grand Prix", CircuitShortName: "Silverstone", Year: 2026, DateStart: "2026-07-03T09:00:00Z", DateEnd: "2026-07-05T16:00:00Z"}); err != nil {
+		t.Fatal(err)
+	}
+	if err := st.UpsertSession(store.Session{SessionKey: 11, MeetingKey: 1, SessionName: "Race", SessionType: "Race", DateStart: "2026-07-05T14:00:00Z", DateEnd: "2026-07-05T16:00:00Z"}); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestWeekendContextHandlerWithoutStoreReturnsNoSeason(t *testing.T) {
+	s := NewServer(nil, 0, nil)
+	rr := httptest.NewRecorder()
+	s.handleWeekendContext(rr, httptest.NewRequest(http.MethodGet, "/api/v1/weekend-context", nil))
+	if rr.Code != http.StatusOK {
+		t.Fatalf("status = %d", rr.Code)
+	}
+	var got query.WeekendContext
+	if err := json.Unmarshal(rr.Body.Bytes(), &got); err != nil {
+		t.Fatal(err)
+	}
+	if got.TemporalState != query.TemporalNoSeason {
+		t.Fatalf("state = %s", got.TemporalState)
+	}
+}
+
+func TestWeekendContextHandlerUsesLiveHubIdentityWithoutOpenF1(t *testing.T) {
+	st := openContextStore(t)
+	seedContextHandler(t, st)
+	now, _ := time.Parse(time.RFC3339, "2026-07-05T13:55:00Z")
+	s := NewServer(nil, 0, st) // a nil OpenF1 client makes any REST dependency panic
+	s.query = query.NewServiceWithClock(st, func() time.Time { return now })
+	s.hub.applySnapshot(live.LiveStreamData{SessionStatus: "Started", Session: live.LiveSessionMeta{MeetingName: "British Grand Prix", CircuitName: "Silverstone", SessionName: "Race", SessionType: "Race"}}, now)
+
+	handler, err := s.routes()
+	if err != nil {
+		t.Fatal(err)
+	}
+	rr := httptest.NewRecorder()
+	handler.ServeHTTP(rr, httptest.NewRequest(http.MethodGet, "/api/v1/weekend-context", nil))
+	if rr.Code != http.StatusOK {
+		t.Fatalf("status = %d body=%s", rr.Code, rr.Body.String())
+	}
+	var got query.WeekendContext
+	if err := json.Unmarshal(rr.Body.Bytes(), &got); err != nil {
+		t.Fatal(err)
+	}
+	if got.TemporalState != query.TemporalSessionLive || got.ActiveSession == nil || got.ActiveSession.Session.SessionKey != 11 {
+		t.Fatalf("live context = %+v", got)
+	}
+	if got.ActiveSession.Availability.LiveTransport != "connected" || got.ActiveSession.Availability.LiveSession != "active" {
+		t.Fatalf("availability = %+v", got.ActiveSession.Availability)
+	}
+}
+
+func TestWeekendContextHandlerUsesTerminalArchiveAsCompletionEvidence(t *testing.T) {
+	st := openContextStore(t)
+	seedContextHandler(t, st)
+	now, _ := time.Parse(time.RFC3339, "2026-07-05T16:05:00Z")
+	s := NewServer(nil, 0, st)
+	s.query = query.NewServiceWithClock(st, func() time.Time { return now })
+	s.hub.applySnapshot(live.LiveStreamData{SessionStatus: "Finished", Session: live.LiveSessionMeta{MeetingName: "British Grand Prix", CircuitName: "Silverstone", SessionName: "Race", SessionType: "Race"}}, now)
+	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.PreviousCompletedSession == nil || got.PreviousCompletedSession.Availability.Archive != "available" {
+		t.Fatalf("archive context = %+v", got)
+	}
+	if got.DefaultAnalysisSession != nil {
+		t.Fatal("archive-only session must not become local default analysis")
+	}
+}
+
+func TestTerminalSessionStatus(t *testing.T) {
+	for _, status := range []string{"Finished", "Finalised", "ENDED", "Aborted"} {
+		if !terminalSessionStatus(status) {
+			t.Errorf("%q should be terminal", status)
+		}
+	}
+	for _, status := range []string{"Started", "Resumed", "Inactive", ""} {
+		if terminalSessionStatus(status) {
+			t.Errorf("%q should not be terminal", status)
+		}
+	}
+}

internal/web/server.go

@@ -62,6 +62,7 @@ func (s *Server) routes() (http.Handler, error) {
 
 	// REST API — /api/v1/laps/comparison must be registered before /api/v1/laps
 	// because Go's ServeMux uses longest-prefix matching.
+	mux.HandleFunc("/api/v1/weekend-context", s.handleWeekendContext)
 	mux.HandleFunc("/api/v1/race-hub", s.handleRaceHub)
 	mux.HandleFunc("/api/v1/seasons", s.handleSeasons)
 	mux.HandleFunc("/api/v1/weekend", s.handleWeekend)

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/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('cc-session-9472')).toBeVisible()
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
+    await expect(page.getByTestId('weekend-between-races')).toBeVisible()
   })
 
   test('serves race hub workspace from built assets', async ({ page }) => {
@@ -44,16 +44,21 @@ test.describe('Production serving (Go + built React)', () => {
     await expect(page.getByText('No live session active')).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()
-    await expect(page).toHaveURL(/\/race-hub/)
+    const primary = page.getByRole('navigation', { name: 'Primary' }).first()
 
-    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/visual/helpers.ts

@@ -14,16 +14,13 @@ export async function waitForScreenshotReady(page: Page): Promise<void> {
   await page.waitForTimeout(150)
 }
 
-export async function gotoCommandCenterReady(page: Page): Promise<void> {
+export async function gotoWeekendReady(page: Page): Promise<void> {
   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()
-  // The e2e stack runs with an unreachable OpenF1 base URL, so wait for the
-  // season-calendar query to settle on its local fallback before screenshotting.
-  await expect(
-    page.getByText('Using local meetings because the full calendar could not load.'),
-  ).toBeVisible()
+  await expect(page.getByTestId('weekend-page')).toBeVisible()
+  // The seeded hermetic DB (Monaco 2025, completed) resolves to season_complete,
+  // rendered by the between-races surface.
+  await expect(page.getByTestId('weekend-between-races')).toBeVisible()
+  await expect(page.getByTestId('wk-last-event')).toBeVisible()
   await waitForScreenshotReady(page)
 }
 

tests/visual/mvp-screens.spec.ts

@@ -1,6 +1,6 @@
 import { test } from '@playwright/test'
 import {
-  gotoCommandCenterReady,
+  gotoWeekendReady,
   gotoDataLibraryReady,
   gotoLiveEmptyReady,
   gotoRaceHubReady,
@@ -8,9 +8,9 @@ import {
 } from './helpers'
 
 test.describe('MVP visual regression', () => {
-  test('command-center', async ({ page }) => {
-    await gotoCommandCenterReady(page)
-    await screenshotPage(page, 'command-center')
+  test('weekend', async ({ page }) => {
+    await gotoWeekendReady(page)
+    await screenshotPage(page, 'weekend')
   })
 
   test('race-hub', async ({ page }) => {

tests/weekend-states.spec.ts

@@ -0,0 +1,156 @@
+import { test, expect, type Page } from '@playwright/test'
+
+// These journeys inject the canonical /api/v1/weekend-context payload directly so
+// each temporal state is exercised deterministically and hermetically, regardless
+// of the seeded database clock. The payloads mirror internal/query.WeekendContext.
+
+const availability = {
+  schedule: 'available',
+  live_transport: 'unknown',
+  live_session: 'inactive',
+  archive: 'unavailable',
+  local_analysis: 'complete',
+  freshness: 'fresh',
+  limitations: [],
+}
+
+function meeting(key: number, name: string, start: string) {
+  return {
+    meeting_key: key,
+    meeting_name: name,
+    meeting_official_name: name,
+    location: name,
+    country_code: 'GBR',
+    country_name: 'United Kingdom',
+    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, 'British Grand Prix', start),
+    availability,
+  }
+}
+
+async function stubContext(page: Page, body: Record<string, unknown>): Promise<void> {
+  await page.route('**/api/v1/weekend-context', (route) =>
+    route.fulfill({ contentType: 'application/json', body: JSON.stringify(body) }),
+  )
+  // Keep supplementary reads hermetic and empty.
+  await page.route('**/api/v1/news**', (route) =>
+    route.fulfill({ contentType: 'application/json', body: '[]' }),
+  )
+}
+
+test.describe('Weekend canonical temporal states (injected)', () => {
+  test('between_weekends pairs the last completed event with the next-event countdown and Prepare CTA', async ({ page }) => {
+    await stubContext(page, {
+      season: 2026,
+      temporal_state: 'between_weekends',
+      previous_meeting: meeting(1, 'British Grand Prix', '2026-07-05T14:00:00Z'),
+      previous_completed_session: ctxSession(11, 'Race', '2026-07-05T14:00:00Z', 1),
+      default_analysis_session: ctxSession(11, 'Race', '2026-07-05T14:00:00Z', 1),
+      next_meeting: meeting(2, 'Hungarian Grand Prix', '2026-07-24T09:00:00Z'),
+      next_session: ctxSession(21, 'Practice 1', '2026-07-24T09:00:00Z', 2),
+      focus_meeting: meeting(2, 'Hungarian Grand Prix', '2026-07-24T09:00:00Z'),
+      championship_round: 12,
+      total_championship_rounds: 24,
+    })
+
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-between-races')).toBeVisible()
+    await expect(page.getByTestId('wk-last-event')).toBeVisible()
+    await expect(page.getByTestId('wk-next-event')).toBeVisible()
+    await expect(page.getByTestId('wk-prepare')).toHaveAttribute('href', '/preview')
+    await expect(page.getByTestId('wk-season-nav')).toContainText('Round 12 of 24')
+  })
+
+  test('between_races Prepare CTA folds into the preparation surface instead of looping', async ({ page }) => {
+    await stubContext(page, {
+      season: 2026,
+      temporal_state: 'between_weekends',
+      next_meeting: meeting(2, 'Hungarian Grand Prix', '2026-07-24T09:00:00Z'),
+      next_session: ctxSession(21, 'Practice 1', '2026-07-24T09:00:00Z', 2),
+      championship_round: 12,
+      total_championship_rounds: 24,
+    })
+
+    await page.goto('/')
+    await page.getByTestId('wk-prepare').click()
+    await expect(page).toHaveURL(/\/preview$/)
+    await expect(page.getByTestId('weekend-pre-session')).toBeVisible()
+    await expect(page.getByTestId('weekend-between-races')).toHaveCount(0)
+  })
+
+  test('pre_session surfaces the preview and the next-session countdown', async ({ page }) => {
+    await stubContext(page, {
+      season: 2026,
+      temporal_state: 'pre_session',
+      next_meeting: meeting(2, 'Hungarian Grand Prix', '2026-07-24T09:00:00Z'),
+      next_session: ctxSession(21, 'Practice 1', '2026-07-24T09:00:00Z', 2),
+      focus_meeting: meeting(2, 'Hungarian Grand Prix', '2026-07-24T09:00:00Z'),
+      championship_round: 12,
+      total_championship_rounds: 24,
+    })
+
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-pre-session')).toBeVisible()
+    await expect(page.getByTestId('wk-pre-head')).toBeVisible()
+  })
+
+  test('between_sessions shows the last result recap and the next-session countdown together', async ({ page }) => {
+    await stubContext(page, {
+      season: 2026,
+      temporal_state: 'between_sessions',
+      focus_meeting: meeting(1, 'British Grand Prix', '2026-07-04T10:00:00Z'),
+      previous_completed_session: ctxSession(11, 'Sprint', '2026-07-04T10:00:00Z', 1),
+      default_analysis_session: ctxSession(11, 'Sprint', '2026-07-04T10:00:00Z', 1),
+      next_session: ctxSession(12, 'Race', '2026-07-05T14:00:00Z', 1),
+      championship_round: 12,
+      total_championship_rounds: 24,
+    })
+
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-between-sessions')).toBeVisible()
+    await expect(page.getByTestId('wk-last-session')).toBeVisible()
+    await expect(page.getByTestId('wk-next-session')).toBeVisible()
+  })
+
+  test('session_live hands off to live timing', async ({ page }) => {
+    await stubContext(page, {
+      season: 2026,
+      temporal_state: 'session_live',
+      focus_meeting: meeting(1, 'British Grand Prix', '2026-07-05T14:00:00Z'),
+      active_session: ctxSession(11, 'Race', '2026-07-05T14:00:00Z', 1),
+      championship_round: 12,
+      total_championship_rounds: 24,
+    })
+
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-live')).toBeVisible()
+    await expect(page.getByTestId('wk-watch-live')).toHaveAttribute('href', '/live')
+  })
+
+  test('an error from the canonical endpoint shows an explicit error surface', async ({ page }) => {
+    await page.route('**/api/v1/weekend-context', (route) =>
+      route.fulfill({ status: 500, contentType: 'application/json', body: '{"error":"boom"}' }),
+    )
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-error')).toBeVisible()
+  })
+})

tests/weekend.spec.ts

@@ -0,0 +1,118 @@
+import { test, expect, type Page } from '@playwright/test'
+
+const FULL_SESSION = 9472
+
+async function documentOverflow(page: Page): Promise<number> {
+  return page.evaluate(() => {
+    const doc = document.documentElement
+    return doc.scrollWidth - doc.clientWidth
+  })
+}
+
+test.describe('Weekend home (seeded canonical context)', () => {
+  test('renders the Weekend home from the canonical endpoint, not the limited fallback', async ({ page }) => {
+    await page.goto('/')
+
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
+    // The seeded DB (Monaco 2025, completed) resolves to season_complete, driven
+    // by the canonical /api/v1/weekend-context endpoint.
+    await expect(page.getByTestId('weekend-page')).toHaveAttribute('data-temporal-state', 'season_complete')
+    await expect(page.getByTestId('weekend-between-races')).toBeVisible()
+    await expect(page.getByTestId('weekend-limited')).toHaveCount(0)
+    // No ingest/dataset terminology on the Weekend surface.
+    await expect(page.getByText(/ingest/i)).toHaveCount(0)
+  })
+
+  test('the completed-event CTA opens the canonical analysis session in Race Hub', async ({ page }) => {
+    await page.goto('/')
+    await expect(page.getByTestId('wk-last-event')).toBeVisible()
+    await page.getByTestId('wk-explore-race-story').click()
+    await expect(page).toHaveURL(/\/race-hub\?session_key=\d+/)
+    await expect(page.getByTestId('race-hub')).toBeVisible()
+  })
+
+  test('/preview alias resolves without looping back to the same screen', async ({ page }) => {
+    await page.goto('/preview')
+    // In the seeded season-complete state there is no next event, so /preview
+    // resolves to the Weekend home rather than a redirect loop.
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
+    await expect(page).toHaveURL(/\/preview$/)
+  })
+
+  test('existing deep-link routes remain valid', async ({ page }) => {
+    await page.goto(`/race-hub?session_key=${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()
+
+    await page.goto('/explore')
+    await expect(page.getByTestId('explore-page')).toBeVisible()
+  })
+})
+
+test.describe('Weekend navigation hierarchy', () => {
+  test('all four destinations are reachable from primary navigation', async ({ page }) => {
+    await page.goto('/')
+    const primary = page.getByRole('navigation', { name: 'Primary' }).first()
+    for (const [label, url] of [
+      ['Championship', /\/championship/],
+      ['Briefing', /\/briefing/],
+      ['Explore', /\/explore/],
+      ['Weekend', /\/$/],
+    ] as const) {
+      await primary.getByRole('link', { name: label, exact: true }).click()
+      await expect(page).toHaveURL(url)
+    }
+  })
+
+  test('Admin is an operator utility outside the Primary landmark', async ({ page }) => {
+    await page.goto('/')
+    const primaries = page.getByRole('navigation', { name: 'Primary' })
+    await expect(primaries.first()).toBeVisible()
+    // Admin must not appear inside any Primary landmark.
+    await expect(primaries.getByRole('link', { name: /Admin/i })).toHaveCount(0)
+    await expect(
+      page.getByRole('toolbar', { name: 'Operator utilities' }).getByRole('link', { name: 'Admin' }),
+    ).toBeVisible()
+  })
+})
+
+test.describe('Weekend responsive — no global horizontal overflow', () => {
+  for (const { name, width, height } of [
+    { name: 'mobile 390', width: 390, height: 844 },
+    { name: 'tablet 768', width: 768, height: 1024 },
+    { name: 'desktop 1440', width: 1440, height: 900 },
+  ]) {
+    test(`no document overflow at ${name}`, async ({ page }) => {
+      await page.setViewportSize({ width, height })
+      await page.goto('/')
+      await expect(page.getByTestId('weekend-between-races')).toBeVisible()
+      expect(await documentOverflow(page)).toBeLessThanOrEqual(1)
+    })
+  }
+
+  test('mobile shows exactly one visible primary navigation (bottom bar)', async ({ page }) => {
+    await page.setViewportSize({ width: 390, height: 844 })
+    await page.goto('/')
+    await expect(page.getByTestId('weekend-page')).toBeVisible()
+
+    // The bottom bar is the single visible primary nav; the top bar's links are
+    // hidden by CSS at this breakpoint.
+    const bottom = page.locator('.app-bottom-nav')
+    await expect(bottom).toBeVisible()
+    await expect(bottom.getByRole('link')).toHaveCount(4)
+
+    const topLinks = page.locator('.app-nav .nav-links')
+    await expect(topLinks).toBeHidden()
+
+    // All four destinations remain reachable via the bottom bar.
+    for (const label of ['Weekend', 'Championship', 'Briefing', 'Explore']) {
+      await expect(bottom.getByRole('link', { name: new RegExp(label) })).toBeVisible()
+    }
+  })
+})