Session 45: Snapshot pipeline + GameCard swap + live ticker (2100 tests)

The on-demand "Read" grade model is RETIRED. A scheduled pipeline pre-grades the
slate, locks grades to the line, tracks movement; the dashboard shows them already
there. Orchestrates existing services — nothing rebuilt.

- snapshotService.runSnapshot(sport): getOdds → gradeAndCacheSlate → classify
  archetype per player → lock gradedAt → line deltas vs previous snapshot → write
  snapshot:{sport}:latest/previous + grades:{sport} → ticker events. Fully
  injectable, zero-network unit tests. runAllSnapshots = cron entrypoint.
- Internal trigger POST /api/internal/snapshot/:sport + /all (requireInternalAuth).
  In-process cron (SNAPSHOT_CRON=1, UTC 14,19,22,1,3) in server.js, no new dep.
- Public reads: GET /api/snapshot/:sport (cache-only) + GET /api/ticker (merges
  TICKER_MANUAL pins) + Next proxies.
- GameCard swap: live Slate renders vyndr/GameCard (legacy kept for types only),
  overlays locked grades onto game props → player name once + archetype badge +
  "Graded Xh ago at -115 · Current 2.5 · ▲ TOWARD +1.0". Ungraded → "Awaiting next
  scan", NO Read button. On-demand onGrade flow deleted.
- Ticker polls /api/ticker every 30s, graceful fallback to hardcoded items.
- NBA/WNBA: espnStatsAdapter free fallback (defensive parse → found:false on shape
  mismatch) wired into resolvePlayerStats after the offline Python service.

Env: PROPLINE_API_KEY_1/2/3, VYNDR_INTERNAL_KEY, SNAPSHOT_CRON=1, TICKER_MANUAL.
Backend 2061 -> 2100 tests (+39), 173 suites. Web build clean (exit 0).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/app/api/snapshot/[sport]/route.ts

@@ -0,0 +1,20 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+export const dynamic = 'force-dynamic';
+
+const BACKEND_URL = process.env.BACKEND_URL || 'http://localhost:3000';
+
+/** Snapshot proxy (Session 45) — forwards GET /api/snapshot/:sport (pre-graded slate). */
+export async function GET(_req: NextRequest, ctx: { params: Promise<{ sport: string }> }) {
+  const { sport } = await ctx.params;
+  try {
+    const upstream = await fetch(`${BACKEND_URL}/api/snapshot/${encodeURIComponent(sport)}`, {
+      method: 'GET',
+      headers: { Accept: 'application/json' },
+    });
+    const data = await upstream.json().catch(() => ({ grades: [], deltas: [] }));
+    return NextResponse.json(data, { status: upstream.ok ? 200 : upstream.status });
+  } catch {
+    return NextResponse.json({ sport, grades: [], deltas: [] }, { status: 200 });
+  }
+}

web/src/app/api/ticker/route.ts

@@ -0,0 +1,22 @@
+import { NextResponse } from 'next/server';
+
+export const dynamic = 'force-dynamic';
+
+const BACKEND_URL = process.env.BACKEND_URL || 'http://localhost:3000';
+
+/**
+ * Ticker proxy (Session 45) — forwards GET /api/ticker to Express (snapshot
+ * exhaust + editorial pins). Thin pass-through; the page polls this every 30s.
+ */
+export async function GET() {
+  try {
+    const upstream = await fetch(`${BACKEND_URL}/api/ticker`, {
+      method: 'GET',
+      headers: { Accept: 'application/json' },
+    });
+    const data = await upstream.json().catch(() => ({ items: [] }));
+    return NextResponse.json(data, { status: upstream.ok ? 200 : upstream.status });
+  } catch {
+    return NextResponse.json({ items: [] }, { status: 200 });
+  }
+}