feat(ui): extinction-chess target cycler in rules drawer

Feature 2 of post-epic-deferrals. Exposes extinction-chess's
configurable targetType through the in-game rules drawer so players
don't need to open devtools or call engine.presetState themselves.

UI:
  - RulesDrawer.tsx renders a 'Target: <PieceType>' chip inside the
    extinction-chess detail card when the preset is active.
    Clicking advances through pawn -> knight -> bishop -> rook ->
    queen -> king -> pawn (wraps). Plural labels ('Pawns', 'Knights',
    ...) for prose.
  - data-testid='extinction-target-cycler' on the chip for e2e.
  - New optional RulesDrawer props extinctionTarget +
    onExtinctionTargetChange; omitted props hide the cycler (no
    hard dependency on the engine).

Wiring (GameView.tsx):
  - Solo-only per plan decision 2a. Multiplayer games use the
    target set at room-creation time; the cycler doesn't render in
    MP to avoid desync (a future preset-config.update WS message
    could lift this; out of v1 scope).
  - Local useState syncs with engine.presetState via a useEffect;
    setExtinctionTarget writes back through the same state API and
    calls refresh() so legal highlights + terminal-state panels
    pick up the target flip.

Docs:
  - extinction-chess.ts docblock updated to reference the shipped
    UI surface + the MP deferral.
  - PRESET-API.md post-landing backlog: remove the 'UI cycling'
    deferral (now shipped), add the MP-target-sync deferral.

Tests:
  - 2 new rule-variants.spec.ts cases: (a) cycler cycles through
    all 6 labels when preset active, (b) cycler hidden when preset
    inactive.

Verification: 1663 unit + 89/89 e2e (87 + 2 new). Typecheck + lint
clean.

Plan: .sisyphus/plans/post-epic-deferrals.md Feature 2 complete.
This commit is contained in:
Joey Yakimowich-Payne 2026-04-21 10:57:46 -06:00
commit 0ce500906c
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5 changed files with 209 additions and 6 deletions

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@ -599,6 +599,8 @@ Documented but NOT yet available:
- Server-side piece-type manifest echo — when custom types are authored outside the shared `packages/chess`.
- Save-state migration — versioning for saves that predate attribute additions.
- Berolina en-passant — deferred for v1.
- Extinction-chess UI cycling — setting target type via a drawer chip.
- Extinction-chess multiplayer target sync — solo cycler shipped in
post-epic Feature 2; MP target is fixed at room creation until a
`preset-config.update` WS message lands.
File issues or propose extensions via pull request.