Session 44: Make it visible — VYNDR archetype names, grade intel, schedule fix, landing page (2061 tests)

Frontend + wiring only. Wires existing backend into the pages users see.

- VYNDR Original archetype rename (41) across archetypeService.js + lib/
  archetypes.js + ArchetypeBadge, each keeping legacyName (resolves stale data).
  Judge -> BOMBER. Old POWER PULL slot -> WHIFF strikeout-artist pitcher.
- BACKEND_HANDOFF.md: canonical frontend<->backend data contract.
- Grade card intel: scan/page.tsx now forwards the engine's intel fields
  (season_avg/form/usage/matchup_grade/archetype/...) into mapScanToGradeResult
  -> STAT CONTEXT + VYNDR INTELLIGENCE sections populate. The chain already
  preserved them (tierGating + /api/scan spread); the page was dropping them.
- Schedule freshness: slateAdapter.isRelevantGame drops completed games >24h
  old; Slate.filteredGames applies it. (TTL already 60s.)
- Landing: Features.tsx rewritten to user-facing copy (no Point-biserial/Zone
  14/ABS/Phi-coefficient).
- Depth chart Next proxies added (/api/stats/lineup|depth|cascade) - were 404.
- GameCard swap DEFERRED (Kev): legacy on-demand card stays as a bridge until
  the snapshot pipeline populates the grades cache; vyndr/GameCard swaps in then.

Backend 2045 -> 2061 tests (+16), 167 suites. Web build clean (exit 0).

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

web/src/app/scan/page.tsx

@@ -47,6 +47,18 @@ interface ScanResponse {
   tier: 'free' | 'analyst' | 'desk';
   error?: string;
   upgrade?: { tier: string; price: number };
+  // Session 43/44 — Player-Intelligence fields the engine attaches; the grade
+  // card's STAT CONTEXT + VYNDR INTELLIGENCE sections read these.
+  season_avg?: number;
+  last10_avg?: number;
+  vs_opp_avg?: number;
+  form?: number;
+  usage?: string;
+  matchup_grade?: string;
+  rest?: string;
+  archetype?: string;
+  archetype_blend?: { archetype: string; weight: number }[];
+  prop_dna?: { reliable: string[]; volatile: string[] };
 }
 
 const NBA_STATS = [
@@ -689,6 +701,18 @@ export default function ScanPage() {
               alt_lines: result.alt_lines,
               kill_conditions: result.kill_conditions,
               tier,
+              // Session 44 — forward the engine's intel fields so the grade
+              // card's STAT CONTEXT + VYNDR INTELLIGENCE sections populate.
+              season_avg: result.season_avg,
+              last10_avg: result.last10_avg,
+              vs_opp_avg: result.vs_opp_avg,
+              form: result.form,
+              usage: result.usage,
+              matchup_grade: result.matchup_grade,
+              rest: result.rest,
+              archetype: result.archetype,
+              archetype_blend: result.archetype_blend,
+              prop_dna: result.prop_dna,
             }) as GradeResultData}
             onAddToParlay={() => {
               addLeg({