Wave 2A: real player headshots — sport-agnostic id threaded from ingestion

Threads a REAL athlete id from the snapshot's per-player stats resolve (zero
new I/O) → enriched grade → grades:{sport} → slate strip → PlayerAvatar. Real
photo where an id resolves; team-colored monogram (never a gray silhouette,
never a broken image) where it can't. Ids are never fabricated.

Ingestion (Addition 1):
- espnStatsAdapter.getSeasonAverages now RETURNS the resolved ESPN athlete id
  (was discarded) as espnId; non-numeric uid degrades to null.
- playerIntelService surfaces MLBAM playerId (MLB) / ESPN espnId (NBA/WNBA).
- snapshotService captures both per player and stores them on the enriched
  grade beside archetype/team (null when unresolved → monogram path).

Thread → component:
- slateAdapter.buildPlayerStripsFromProps carries playerId/espnId onto each
  strip; StatStrip → PlayerAvatar (accepts both ids; getHeadshotUrl routes by
  sport: MLB→mlbstatic, NBA/WNBA→a.espncdn).
- Silhouette surfaces rewired to PlayerAvatar (branded monogram on null):
  scan search dropdown (guarded MLBAM p.id) + tonight chips, SearchModal,
  HotListPanel, GradeResultCard header. Scan grade card feeds the picked
  MLBAM id through gradeAdapter.
- playerHeadshot pure URL logic extracted to CommonJS playerHeadshotUrl.js
  (unit-testable; the .ts re-exports it). nfl/nhl added to ESPN_SPORT_PATH.

Tests: tests/unit/headshotThread.test.js (per-league URL + id thread + monogram
null path) + extended snapshotService/espnStatsAdapter suites. Full suite
241 suites / 2915 green; next build exit 0.

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

src/services/playerIntelService.js

@@ -165,7 +165,9 @@ async function resolvePlayerStats(name, sport, opts = {}) {
           const mpg = Number(ci.mpg ?? ci.min ?? ci.minutes);
           const extra = Number.isFinite(mpg) && mpg > 0 ? { usage: `${Math.round(mpg)} min` } : {};
           if (extra.usage) season.push({ k: 'MIN', v: String(Math.round(mpg)) });
-          return { found: true, team: e.team || '', classifierInput: { ...ci, pos: e.position, ...extra }, season, last10: [], splits: [] };
+          // Wave 2A — the REAL ESPN athlete id (headshot CDN) surfaces from the
+          // adapter. Absent → no id → monogram. Never guessed.
+          return { found: true, team: e.team || '', classifierInput: { ...ci, pos: e.position, ...extra }, season, last10: [], splits: [], espnId: e.espnId ?? null };
         }
         return { found: false };
       }