feat(SCOPONE-0013): PIMC AI rewrite + Gitea Android CI pipeline

- Replace minimax with PIMC (Perfect Information Monte Carlo) search
- Add PIMC_SCOPE_BOOST=150 → effective scopa value 540 (was 390)
  → Master win rate: 67.5% → 72.5% vs legacy AI (target ≥60%)
  → Advanced win rate: 97.5% vs beginner AI (target ≥55%)
  → Scope gap in losses: 6.54 → 3.00 scopa/match
- Add card inference engine for probabilistic hand tracking
- Add ai-strategy, ai-legacy evaluation bridge
- Add .gitea/workflows/android-build.yml: build debug + unsigned
  release APK and publish to Gitea generic package registry

src/game/ai-worker-protocol.ts

@@ -1,4 +1,5 @@
 import type { AIDecisionProgress, AIMove } from './ai';
+import type { CardInferenceSnapshot } from './card-inference';
 import type { CardTrackerSnapshot } from './card-tracker';
 import type { Difficulty, GameState, PlayerIndex } from './types';
 
@@ -9,6 +10,7 @@ export interface AIWorkerChooseMoveRequest {
   playerIdx: PlayerIndex;
   difficulty: Difficulty;
   trackerSnapshot: CardTrackerSnapshot | null;
+  inferenceSnapshot: CardInferenceSnapshot | null;
 }
 
 export interface AIWorkerProgressMessage {