Session 47: Name normalization + grade intel + ticker polish (2149 tests)

- Name normalization completed: NICKNAMES table (Matt↔Matthew, Mike↔Michael...)
  resolved in nameKey, parenthetical team-tag strip "(STL)", verified accent-fold
  (Iván/Ivan, José/Jose). Slate strip now DISPLAYS the normalized de-dotted name
  ("AJ Ewing" not "A.J. Ewing") via buildPlayerStripsFromProps.
- Complete MLB VYNDR INTELLIGENCE: mlbGameLogFeatures derives rest_days (days off
  between latest games; 0=B2B) + ab_per_game (usage). buildIntelFields renders
  usage as "X AB/G", rest as B2B/Xd, matchup from bvp_advantage fallback.
- Ticker SCAN dedup: pushTickerItems keeps one SCAN per sport (sport field or
  text-prefix parse for legacy); MOVE/GRADE preserved; cap 50.
- BOMBER threshold prorated for mid-season (hr>=15 strong / >=10 mod) so June
  sluggers classify BOMBER not FLEX/DRIVER.

Backend 2122 -> 2149 tests (+27), 179 suites. Web build clean (exit 0).

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

src/services/snapshotService.js

@@ -115,7 +115,7 @@ const isTopGrade = (g) => g === 'A+' || g === 'A';
 function generateTickerEvents(sport, grades, deltas, ts) {
   const events = [];
   events.push({
-    tag: 'SCAN', color: 'var(--g-a)', ts,
+    tag: 'SCAN', color: 'var(--g-a)', ts, sport, // sport tag → dedupe one SCAN per sport
     text: `${sport.toUpperCase()} slate scanned · ${grades.length} props graded`,
   });
   for (const g of grades.filter((x) => isTopGrade(x.grade)).slice(0, 6)) {
@@ -136,11 +136,28 @@ function generateTickerEvents(sport, grades, deltas, ts) {
   return events;
 }
 
+// Session 47 — a SCAN event's sport, from the event field or its text prefix
+// (defends ticker items written before the `sport` field existed).
+function scanSportOf(e) {
+  if (e.tag !== 'SCAN') return null;
+  if (e.sport) return String(e.sport).toLowerCase();
+  const m = String(e.text || '').match(/^([a-z]+)\s+slate scanned/i);
+  return m ? m[1].toLowerCase() : null;
+}
+
 async function pushTickerItems(events, deps) {
   if (!events || events.length === 0) return;
   const existing = await deps.cacheGet('ticker:items');
   const arr = Array.isArray(existing) ? existing : [];
-  const merged = [...events, ...arr].slice(0, TICKER_CAP);
+  // Keep only the LATEST SCAN per sport: drop existing SCAN events for any sport
+  // that has a fresh SCAN in this batch. MOVE/GRADE events are time-specific and
+  // preserved.
+  const freshScanSports = new Set(events.map(scanSportOf).filter(Boolean));
+  const pruned = arr.filter((e) => {
+    const sp = scanSportOf(e);
+    return !(sp && freshScanSports.has(sp));
+  });
+  const merged = [...events, ...pruned].slice(0, TICKER_CAP);
   await deps.cacheSet('ticker:items', merged, TICKER_TTL);
 }