S6 (a1): display — the full picture under the grammar

- specs/ROW-GRAMMAR.md: the row grammar law (slot order, color law, mark
  law, mobile stacking, no-truncation), locked by tests/unit/rowGrammar.
  StatStrip violations fixed: MovementChip before the grade (market
  context before model output); ViabilityChips after the archetype
  (identity is one contiguous run).
- Line-movement sparklines: intradayRefreshService.trackHistory captures
  real {t,line} points per grade (seeded with the lock, deduped when
  flat, capped 24) inside the snapshot write-back; StatStrip.LineSparkline
  renders at >=3 points (green toward / amber against / dim flat).
- Last-10 dot strips: services/last10Dots (streaksService accessors) ->
  /api/snapshot/:sport attaches last10_dots from rosterlogs:{sport};
  StatStrip.DotStrip renders vs the LOCKED line, newest first.
- CLV distribution: getModelAggregate emits clv_distribution (7 signed
  buckets, outliers clamped) only past the centralized n>=20 gate;
  ledger MODEL header renders the bar strip.
- Global search: SearchModal (cmd-K via GlobalHosts + window.__search),
  players via /api/players/search per sport + static lib/teams.js
  (soccer deliberately absent); Nav search icon + Search first in the
  mobile More sheet. Explore tab untouched.
- Landing LCP: fade-up floored at opacity .6 (hero h1 contentful on
  first frame, S33 visible-floor rule) + IBM Plex Mono preload:false
  (4 decorative font files off the slow-4G critical path).

2654 -> 2698 tests (226 suites) green; web build exit 0.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/routes/snapshot.js

@@ -13,6 +13,9 @@ const express = require('express');
 const { createRateLimit } = require('../middleware/rateLimit');
 const { cacheGet } = require('../utils/redis');
 const { nameKey } = require('../utils/playerName');
+// S6 (A1 board) — ●●○●● last-10 vs tonight's locked line, computed from the
+// rosterlogs blob the snapshot pipeline already writes. Pure, cache-only.
+const { indexRosterLogs, attachLast10Dots } = require('../services/last10Dots');
 
 const router = express.Router();
 router.use(createRateLimit({ windowMs: 60_000, max: 60 }));
@@ -79,20 +82,23 @@ router.get('/summary', async (req, res) => {
 router.get('/:sport', async (req, res) => {
   const sport = String(req.params.sport || '').toLowerCase();
   try {
-    const [snap, outcomeLog] = await Promise.all([
+    const [snap, outcomeLog, rosterBlob] = await Promise.all([
       cacheGet(`snapshot:${sport}:latest`),
       cacheGet(`outcomes:${sport}:log`),
+      cacheGet(`rosterlogs:${sport}`),
     ]);
     const idx = outcomeIndex(outcomeLog);
+    const roster = indexRosterLogs(rosterBlob);
+    const enrich = (grades) => attachLast10Dots(attachOutcomes(grades, idx), roster, sport);
     if (snap && Array.isArray(snap.grades)) {
       res.set('Cache-Control', 'public, max-age=30');
-      return res.json({ sport, updated_at: snap.updated_at, grades: attachOutcomes(snap.grades, idx), deltas: snap.deltas || [] });
+      return res.json({ sport, updated_at: snap.updated_at, grades: enrich(snap.grades), deltas: snap.deltas || [] });
     }
     // Fallback: the grades envelope (no deltas yet).
     const env = await cacheGet(`grades:${sport}`);
     const grades = env && Array.isArray(env.grades) ? env.grades : [];
     res.set('Cache-Control', 'public, max-age=30');
-    return res.json({ sport, updated_at: env && env.updated_at, grades: attachOutcomes(grades, idx), deltas: [] });
+    return res.json({ sport, updated_at: env && env.updated_at, grades: enrich(grades), deltas: [] });
   } catch (err) {
     console.error('[snapshot]', err.message);
     return res.status(200).json({ sport, grades: [], deltas: [] });