fix(ci): add tauri package.json to Dockerfiles and fix Android NDK/build issues

Build and Deploy: workspace has 4 members (api/web/shared/tauri) but
Dockerfiles only copied 3 package.json files. Missing tauri workspace
member caused bun install --production to fail with frozen lockfile
error.

Build Android APK:
- Remove explicit NDK 28 install (runner has NDK 29 pre-installed, dual
  NDK presence broke ANDROID_NDK_HOME resolution)
- Auto-pin NDK version from runner's SDK
- rm -rf gen/android before tauri android init (stale cache recovery)
- Remove gen/android/.gradle from Gradle cache (causes stale state)
- Use --apk flag for faster APK-only build

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/android.yml

@@ -64,7 +64,9 @@ jobs:
       - name: Setup Android SDK
         uses: android-actions/setup-android@v3
         with:
-          packages: 'platforms;android-36 build-tools;36.0.0 ndk;28.0.13004108'
+          packages: 'platforms;android-36 build-tools;36.0.0'
+      - name: Pin NDK version
+        run: echo "ANDROID_NDK_HOME=${ANDROID_SDK_ROOT}/ndk/$(ls ${ANDROID_SDK_ROOT}/ndk | sort -V | head -1)" >> $GITHUB_ENV
 
       - name: Setup Rust with Android targets
         uses: dtolnay/rust-toolchain@stable
@@ -92,7 +94,6 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-            apps/tauri/gen/android/.gradle
           key: ${{ runner.os }}-gradle-android-${{ hashFiles('apps/tauri/Cargo.lock') }}
           restore-keys: |
             ${{ runner.os }}-gradle-android-
@@ -131,7 +132,9 @@ jobs:
           JAVA_HOME: ${{ env.JAVA_HOME_21_X64 }}
           ANDROID_HOME: ${{ env.ANDROID_SDK_ROOT }}
           NDK_HOME: ${{ env.ANDROID_NDK_HOME }}
-        run: bun tauri android init
+        run: |
+          rm -rf gen/android
+          bun tauri android init
 
       - name: Build Tauri Android APK
         working-directory: apps/tauri
@@ -139,7 +142,7 @@ jobs:
           JAVA_HOME: ${{ env.JAVA_HOME_21_X64 }}
           ANDROID_HOME: ${{ env.ANDROID_SDK_ROOT }}
           NDK_HOME: ${{ env.ANDROID_NDK_HOME }}
-        run: bun tauri android build
+        run: bun tauri android build --apk
 
       - name: Decode keystore
         if: github.event_name != 'pull_request'