Session 48: Name normalization at every layer + usage field (2156 tests)

Trace-first: the normalizer functions were correct (S47) but raw names still
flowed through paths that skipped them. Fixed each leaking path.

- 2a (source chokepoint): snapshotService.runSnapshot normalizes each grade's
  player to the de-dotted display AND dedupes to one grade per nameKey|stat
  (highest confidence) before writing grades:{sport} + snapshot:latest. Every
  consumer (GameCard, Explore, leaders, profile) now gets clean merged names.
- 2b: buildPlayerStripsFromProps dedupes a player's props by stat (graded >
  awaiting) → one row per stat (kills "Ks 5.5 AND Ks 3.5" variant dupes).
- 2c: scan tonightsPlayers grid groups by nameKey, displays normalized name.
- 3: profile VYNDR INTELLIGENCE "+0%"/"—" was buildIntel's defaults (separate
  from the grade card's buildIntelFields, which already works). resolvePlayerStats
  now attaches real usage (AB/G) + rest (B2B/Xd); buildIntel renders them; REST
  default is now "—".

Backend 2149 -> 2156 tests (+7), 181 suites. Web build clean (exit 0).

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

src/services/playerIntelService.js

@@ -119,6 +119,10 @@ async function resolvePlayerStats(name, sport, opts = {}) {
       const res = await mlb.getPlayerStats(name);
       if (!res || !res.found) return { found: false };
       const classifierInput = res.group === 'pitching' ? mapMlbPitcher(res.season) : mapMlbHitter(res.season);
+      // Session 48 — real VYNDR INTELLIGENCE for the player profile: usage (AB/G)
+      // + rest (days off between the two most recent games; 0 = B2B). The
+      // classify() scorer ignores these extra keys; buildIntel reads them.
+      Object.assign(classifierInput, mlbProfileIntel(res));
       return {
         found: true,
         team: res.team || '',
@@ -164,18 +168,43 @@ async function resolvePlayerStats(name, sport, opts = {}) {
   return { found: false };
 }
 
+/**
+ * Profile VYNDR INTELLIGENCE bits from real MLB stats (Session 48):
+ * usage = AB/G (the MLB usage equivalent), rest = days off between the two most
+ * recent games ("B2B"/"Xd rest"). Returns {} when unavailable.
+ */
+function mlbProfileIntel(res) {
+  const out = {};
+  const ab = parseFloat(res.season && res.season.atBats);
+  const gp = parseFloat(res.season && (res.season.gamesPlayed ?? res.season.gamesStarted));
+  if (Number.isFinite(ab) && Number.isFinite(gp) && gp > 0) {
+    out.usage = `${Math.round((ab / gp) * 10) / 10} AB/G`;
+  }
+  const dated = Array.isArray(res.last10) ? res.last10.filter((g) => g && g.date) : [];
+  if (dated.length >= 2) {
+    const gap = Math.round((new Date(dated[dated.length - 1].date) - new Date(dated[dated.length - 2].date)) / 86_400_000);
+    if (Number.isFinite(gap) && gap >= 1 && gap <= 14) {
+      const off = gap - 1;
+      out.rest = off === 0 ? 'B2B' : `${off}d rest`;
+    }
+  }
+  return out;
+}
+
 /** Derive the VYNDR Intelligence metric row from whatever we have. */
 function buildIntel(stats, arch, propCount) {
   const clamp = (n, lo, hi) => Math.max(lo, Math.min(hi, n));
   // Form: lean on last-10 vs season if provided, else a neutral baseline that
   // scales gently with the strongest graded prop's confidence proxy.
   const form = stats.form != null ? clamp(Math.round(stats.form), 0, 100) : 70 + clamp(propCount * 4, 0, 22);
-  const usage = stats.usg != null ? `${stats.usg}%` : stats.k9 != null ? `${stats.k9} K/9` : '—';
+  // Session 48 — prefer a preformatted usage string (e.g. "3.6 AB/G"); rest
+  // shows the real value or "—" (no more bogus "+0%").
+  const usage = stats.usage || (stats.usg != null ? `${stats.usg}%` : stats.k9 != null ? `${stats.k9} K/9` : '—');
   return [
     { label: 'FORM', kind: 'form', value: String(form), score: `${clamp(form, 0, 100)}%`, color: form >= 85 ? '#00ffb8' : form >= 70 ? '#00D4A0' : '#FFB347' },
     { label: 'USAGE', kind: 'plain', value: usage, color: '#e8e8f0' },
     { label: 'MATCHUP', kind: 'grade', value: arch.primary ? gradeFromForm(form) : 'B', color: '#00D4A0' },
-    { label: 'REST', kind: 'plain', value: stats.rest || '+0%', color: '#00D4A0' },
+    { label: 'REST', kind: 'plain', value: stats.rest || '—', color: '#00D4A0' },
   ];
 }