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>

CLAUDE.md

@@ -386,6 +386,33 @@ Built from the Claude Design "VYNDR Player Intelligence" bundle.
   `matchesTeam` must guard empty names (`t.includes('')` is always true) — and
   the schedule `find` checks `g.home`/`g.away`, not the game object.
 
+## VYNDR Original Archetypes + Make-It-Visible (Session 44 — non-obvious)
+- **Archetype names are VYNDR Originals** (TORCH/BOMBER/ALPHA/…), NOT the old
+  descriptive labels. The registry keys in `archetypeService.js` + the map keys
+  in `lib/archetypes.js` are the new names; each carries `legacyName`/`legacy`
+  (the old label, NEVER displayed). `getArchetype()` + `archetypeInfo()` +
+  `badgeStyle()` resolve legacy names → the canonical VYNDR name (defends stale
+  cached data). The `classify()` scorer objects use the new keys too — if you
+  edit a threshold, use the new key. Full mapping is in `BACKEND_HANDOFF.md`.
+- **MLB power merge:** there's ONE power archetype (BOMBER) — it fires for any
+  high-HR bat (incl. high-K sluggers like Judge → BOMBER). The old POWER PULL
+  slot became WHIFF (strikeout-artist pitcher). Don't re-split power.
+- **`BACKEND_HANDOFF.md`** (repo root) is the canonical frontend↔backend data
+  contract — update it in the same commit when an endpoint/component shape changes.
+- **Grade-card intel gotcha:** the engine→tierGating→/api/scan chain already
+  preserves the intel fields (everything spreads `...result`/`...data`). The bug
+  was `scan/page.tsx` passing a hardcoded field subset to `mapScanToGradeResult`
+  — it must forward season_avg/last10_avg/form/usage/matchup_grade/rest/archetype
+  /archetype_blend/prop_dna (and `ScanResponse` must type them) or the card
+  sections stay hidden.
+- **Stale games:** `slateAdapter.isRelevantGame(game, now)` drops completed games
+  >24h old; `Slate.filteredGames` applies it. Schedule TTL is 60s.
+- **GameCard swap is DEFERRED** (Kev's call): the live Slate keeps the legacy
+  on-demand "Read" card as a bridge until the snapshot pipeline lands. The
+  on-demand grade model is being retired for a pre-graded snapshot model; the
+  vyndr/GameCard (playerStrips/pitchers) is built for that and swaps in then.
+  Don't swap it before the grades cache is populated (cards would be blank).
+
 ## Active Skills
 - vyndr-voice (all user-facing output)
 - prop-analysis (grading methodology)