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feat(race-story): polish chapter strip, controls, graph, and map UX (#68)

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Consolidate the Race Story section into a cohesive timeline surface: custom
chapter-strip scrolling with active-card sync, unified segmented playback
controls, chapter bands on the position graph with decimated axes and
de-collided labels, map toggle gated by an on-mount replay/outline probe,
and shared empty-state cards. Adds vitest coverage and visual snapshots.

Note: replay/outline queries now probe on mount (not only when Map opens) so
the toggle can be hidden before users hit a dead panel.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Aman Tahiliani
2026-07-12 13:23:07 -04:00
parent f0a8e4e631
commit 02a84f67b4
20 changed files with 759 additions and 224 deletions
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63
frontend/src/styles/chapters.css
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@@ -9,6 +9,7 @@
align-items: center;
justify-content: space-between;
gap: var(--s4);
flex-wrap: wrap;
}
.chapter-strip-title {
@@ -44,6 +45,31 @@
color: var(--text);
}
.chapter-strip-scroll-wrap {
position: relative;
}
.chapter-strip-scroll-wrap::before,
.chapter-strip-scroll-wrap::after {
content: '';
position: absolute;
top: 0;
bottom: var(--s2);
width: 28px;
pointer-events: none;
z-index: 1;
}
.chapter-strip-scroll-wrap::before {
left: 0;
background: linear-gradient(to right, var(--bg), transparent);
}
.chapter-strip-scroll-wrap::after {
right: 0;
background: linear-gradient(to left, var(--bg), transparent);
}
.chapter-strip-scroll {
display: flex;
gap: var(--s3);
@@ -51,10 +77,26 @@
padding-bottom: var(--s2);
scroll-snap-type: x mandatory;
-webkit-overflow-scrolling: touch;
scrollbar-width: thin;
scrollbar-color: var(--border-2) transparent;
}
.chapter-strip-scroll::-webkit-scrollbar {
height: 4px;
}
.chapter-strip-scroll::-webkit-scrollbar-track {
background: transparent;
}
.chapter-strip-scroll::-webkit-scrollbar-thumb {
background: var(--border-2);
border-radius: 999px;
}
.chapter-card {
flex: 0 0 min(240px, 72vw);
min-height: 88px;
display: flex;
flex-direction: column;
gap: var(--s2);
@@ -64,7 +106,7 @@
background: var(--surface);
text-align: left;
cursor: pointer;
scroll-snap-align: start;
scroll-snap-align: center;
transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
@@ -145,10 +187,21 @@
-webkit-line-clamp: 2;
-webkit-box-orient: vertical;
overflow: hidden;
flex: 1;
}
.chapter-strip-empty {
font-size: 12px;
color: var(--text-3);
padding: var(--s3) 0;
.chapter-strip-empty-card {
padding: var(--s6) var(--s5);
margin: 0;
}
.chapter-strip-empty-card .empty-state-icon {
margin: 0 auto var(--s3);
color: var(--text-3);
}
@media (max-width: 900px) {
.chapter-strip-header {
align-items: flex-start;
}
}