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-client.ts

@@ -1,4 +1,4 @@
-import { AIDecisionProgress, AIMove, chooseMove } from './ai';
+import { AIChooseMoveOptions, AIDecisionProgress, AIMove, chooseMove } from './ai';
 import {
   AIWorkerErrorMessage,
   AIWorkerRequestMessage,
@@ -14,6 +14,7 @@ export interface AIWorkerClientLike {
     difficulty?: Difficulty,
     tracker?: CardTracker,
     onProgress?: (progress: AIDecisionProgress) => void,
+    options?: AIChooseMoveOptions,
   ): Promise<AIMove>;
   dispose(): void;
 }
@@ -26,6 +27,7 @@ interface PendingRequest {
   difficulty: Difficulty;
   tracker?: CardTracker;
   onProgress?: (progress: AIDecisionProgress) => void;
+  options?: AIChooseMoveOptions;
   resolve: (move: AIMove) => void;
   reject: (error: Error) => void;
 }
@@ -66,6 +68,7 @@ export class AIWorkerClient implements AIWorkerClientLike {
     difficulty: Difficulty = 'advanced',
     tracker?: CardTracker,
     onProgress?: (progress: AIDecisionProgress) => void,
+    options?: AIChooseMoveOptions,
   ): Promise<AIMove> {
     if (this.disposed) {
       throw new Error('AIWorkerClient has been disposed');
@@ -85,6 +88,7 @@ export class AIWorkerClient implements AIWorkerClientLike {
         difficulty,
         tracker,
         onProgress,
+        options,
         resolve,
         reject,
       };
@@ -98,6 +102,7 @@ export class AIWorkerClient implements AIWorkerClientLike {
         playerIdx,
         difficulty,
         trackerSnapshot: tracker ? tracker.toSnapshot() : null,
+        inferenceSnapshot: options?.inference?.toSnapshot() ?? null,
       };
 
       try {
@@ -179,6 +184,7 @@ export class AIWorkerClient implements AIWorkerClientLike {
         pending.difficulty,
         pending.tracker,
         pending.onProgress,
+        pending.options,
       );
       pending.resolve(move);
     } catch (error) {