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

.gitea/workflows/android-build.yml

@@ -0,0 +1,125 @@
+name: Android Build & Publish
+
+on:
+  push:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  android:
+    runs-on: ubuntu-latest
+
+    steps:
+      # ── 1. Source ────────────────────────────────────────────────────────────
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      # ── 2. Java ──────────────────────────────────────────────────────────────
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '17'
+
+      # ── 3. Node.js ───────────────────────────────────────────────────────────
+      - name: Set up Node 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: npm
+
+      # ── 4. Android SDK ───────────────────────────────────────────────────────
+      - name: Install Android SDK command-line tools
+        run: |
+          SDK_DIR="$HOME/android-sdk"
+          echo "ANDROID_HOME=$SDK_DIR"           >> "$GITHUB_ENV"
+          echo "ANDROID_SDK_ROOT=$SDK_DIR"       >> "$GITHUB_ENV"
+
+          mkdir -p "$SDK_DIR/cmdline-tools"
+
+          # Download cmdline-tools 12.0 (build 11076708) — stable known-good version
+          TOOLS_URL="https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip"
+          curl -fsSL "$TOOLS_URL" -o /tmp/cmdline-tools.zip
+          unzip -q /tmp/cmdline-tools.zip -d "$SDK_DIR/cmdline-tools"
+          # The zip unpacks to "cmdline-tools/"; rename to "latest" per SDK layout
+          mv "$SDK_DIR/cmdline-tools/cmdline-tools" "$SDK_DIR/cmdline-tools/latest"
+
+          echo "$SDK_DIR/cmdline-tools/latest/bin" >> "$GITHUB_PATH"
+          echo "$SDK_DIR/platform-tools"           >> "$GITHUB_PATH"
+
+      - name: Accept SDK licenses & install platform/build-tools
+        run: |
+          yes | sdkmanager --licenses > /dev/null
+          sdkmanager \
+            "platforms;android-36" \
+            "build-tools;35.0.0" \
+            "platform-tools"
+
+      # ── 5. Caches ────────────────────────────────────────────────────────────
+      - name: Cache Gradle files
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: gradle-${{ hashFiles('android/**/*.gradle*', 'android/gradle/wrapper/gradle-wrapper.properties') }}
+          restore-keys: gradle-
+
+      # ── 6. JS build ──────────────────────────────────────────────────────────
+      - name: Install JS dependencies
+        run: npm ci
+
+      - name: Build web assets
+        run: npm run build
+
+      # ── 7. Capacitor sync ────────────────────────────────────────────────────
+      - name: Capacitor sync android
+        run: npx cap sync android
+
+      # ── 8. Android build ─────────────────────────────────────────────────────
+      - name: Make gradlew executable
+        run: chmod +x android/gradlew
+
+      - name: Build Debug APK
+        working-directory: android
+        run: ./gradlew assembleDebug --no-daemon
+
+      - name: Build Release APK (unsigned — no signing key required)
+        working-directory: android
+        run: ./gradlew assembleRelease --no-daemon
+
+      # ── 9. Publish to Gitea generic package registry ─────────────────────────
+      - name: Publish APKs to Gitea package registry
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -euo pipefail
+          VERSION="${{ github.run_number }}"
+          BASE="https://git.sal.giize.com/api/packages/mozempk/generic/scopone-android"
+
+          upload() {
+            local src="$1" dst_name="$2"
+            echo "→ Uploading $dst_name (version $VERSION)…"
+            HTTP=$(curl --silent --show-error --write-out "%{http_code}" \
+              -X PUT \
+              -H "Authorization: token $TOKEN" \
+              --upload-file "$src" \
+              "$BASE/$VERSION/$dst_name")
+            if [[ "$HTTP" != "20"* ]]; then
+              echo "✗ Upload failed — HTTP $HTTP"
+              exit 1
+            fi
+            echo "✓ $dst_name → $BASE/$VERSION/$dst_name"
+          }
+
+          upload android/app/build/outputs/apk/debug/app-debug.apk \
+                 app-debug.apk
+
+          upload android/app/build/outputs/apk/release/app-release-unsigned.apk \
+                 app-release-unsigned.apk
+
+          echo ""
+          echo "📦 Package index: $BASE/$VERSION/"