Update workflow to build mobile app instead of Android

- Updated default components from 'desktop,android,backend' to 'desktop,mobile,backend'
- Replaced Android build job with Flutter mobile build job
- Updated release notes to reference Flutter mobile app instead of Android
- Updated artifact download and installation instructions for mobile app

.github/workflows/unified-release.yml

@@ -13,7 +13,7 @@ on:
       components:
         description: 'Components to release (comma separated)'
         required: false
-        default: 'desktop,android,backend'
+        default: 'desktop,mobile,backend'
         type: string
 
 env:
@@ -173,6 +173,15 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y libgtk-3-dev libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf
     
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+        cache: 'npm'
+        cache-dependency-path: |
+          swingmusic-desktop/package-lock.json
+          swingmusic-webclient/package-lock.json
+    
     - name: Rust setup
       uses: dtolnay/rust-toolchain@stable
       with:
@@ -187,6 +196,11 @@ jobs:
     - name: Install Tauri CLI
       run: npm install -g @tauri-apps/cli
     
+    - name: Install webclient dependencies
+      run: |
+        cd swingmusic-webclient
+        npm ci
+    
     - name: Build Desktop App
       run: |
         cd swingmusic-desktop
@@ -226,6 +240,15 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y mingw-w64 g++-multilib nsis
     
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+        cache: 'npm'
+        cache-dependency-path: |
+          swingmusic-desktop/package-lock.json
+          swingmusic-webclient/package-lock.json
+    
     - name: Rust setup
       uses: dtolnay/rust-toolchain@stable
       with:
@@ -240,6 +263,11 @@ jobs:
     - name: Install Tauri CLI
       run: npm install -g @tauri-apps/cli
     
+    - name: Install webclient dependencies
+      run: |
+        cd swingmusic-webclient
+        npm ci
+    
     - name: Build Desktop App
       run: |
         cd swingmusic-desktop
@@ -276,6 +304,15 @@ jobs:
     - name: Initialize submodules
       run: git submodule update --init --recursive
     
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+        cache: 'npm'
+        cache-dependency-path: |
+          swingmusic-desktop/package-lock.json
+          swingmusic-webclient/package-lock.json
+    
     - name: Rust setup
       uses: dtolnay/rust-toolchain@stable
       with:
@@ -290,6 +327,11 @@ jobs:
     - name: Install Tauri CLI
       run: npm install -g @tauri-apps/cli
     
+    - name: Install webclient dependencies
+      run: |
+        cd swingmusic-webclient
+        npm ci
+    
     - name: Build Desktop App
       run: |
         cd swingmusic-desktop
@@ -305,49 +347,41 @@ jobs:
           !swingmusic-desktop/target/${{ matrix.rust_target }}/release/bundle/.*/
         retention-days: 30
 
-  # Android builds
-  build-android:
-    name: Build Android App
+  # Mobile builds
+  build-mobile:
+    name: Build Mobile App
     runs-on: ubuntu-latest
     needs: get-version
-    if: contains(github.event.inputs.components, 'android') || github.event_name == 'push'
+    if: contains(github.event.inputs.components, 'mobile') || github.event_name == 'push'
     
     steps:
     - uses: actions/checkout@v4
     - name: Initialize submodules
       run: git submodule update --init --recursive
     
-    - name: Setup Java
-      uses: actions/setup-java@v4
+    - name: Setup Flutter
+      uses: subosito/flutter-action@v2
       with:
-        distribution: 'temurin'
-        java-version: '17'
+        flutter-version: '3.19.6'
+        cache: true
+        cache-key: flutter-${{ hashFiles('**/pubspec.yaml') }}
+        channel: 'stable'
     
-    - name: Setup Android SDK
-      uses: android-actions/setup-android@v3
-    
-    - name: Cache Gradle
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.gradle/caches
-          ~/.gradle/wrapper
-        key: gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-        restore-keys: gradle-
-    
-    - name: Grant execute permission for gradlew
-      run: cd swingmusic-android && chmod +x gradlew
-    
-    - name: Build Android App
+    - name: Install dependencies
       run: |
-        cd swingmusic-android
-        ./gradlew assembleRelease
+        cd swingmusic_mobile
+        flutter pub get
     
-    - name: Upload Android artifacts
+    - name: Build Mobile App
+      run: |
+        cd swingmusic_mobile
+        flutter build apk --release --no-pub
+    
+    - name: Upload Mobile artifacts
       uses: actions/upload-artifact@v4
       with:
-        name: android-release
-        path: swingmusic-android/app/build/outputs/apk/release/*.apk
+        name: mobile-release
+        path: swingmusic_mobile/build/app/outputs/flutter-apk/app-release.apk
         retention-days: 30
 
   # Backend builds
@@ -377,7 +411,7 @@ jobs:
     - name: Install dependencies
       run: |
         cd src/swingmusic
-        pip install -r requirements.txt
+        pip install -r ../../requirements.txt
     
     - name: Build Backend Package
       run: |
@@ -396,7 +430,7 @@ jobs:
   create-release:
     name: Create Unified Release
     runs-on: ubuntu-latest
-    needs: [get-version, build-linux-desktop, build-windows-desktop, build-macos-desktop, build-android, build-backend]
+    needs: [get-version, build-linux-desktop, build-windows-desktop, build-macos-desktop, build-mobile, build-backend]
     if: success()
     
     steps:
@@ -418,7 +452,7 @@ jobs:
         find artifacts -name "*.deb" -exec cp {} release-assets/ \; 2>/dev/null || true
         find artifacts -name "*.rpm" -exec cp {} release-assets/ \; 2>/dev/null || true
         
-        # Android APK
+        # Mobile APK
         find artifacts -name "*.apk" -exec cp {} release-assets/ \; 2>/dev/null || true
         
         # Backend package
@@ -461,9 +495,11 @@ jobs:
           - **Linux**: Choose `.deb`, `.rpm`, or `.AppImage`
           
           ### 📱 Mobile Application
-          - **Android**: Download `.apk` file and install
-          
-          ### 🔧 Backend Server
+          - **Flutter**: Download `.apk` file and install
+          ```bash
+          # Install APK
+          adb install swingmusic-*.apk
+          ```
           - **Python**: Download `.whl` file: `pip install swingmusic-*.whl`
           - **Source**: Download `.tar.gz` for manual installation
           
@@ -504,7 +540,7 @@ jobs:
           
           ## 📋 Components
           - ✅ **Desktop**: Cross-platform desktop application (4 platforms)
-          - ✅ **Android**: Native Android application  
+          - ✅ **Mobile**: Native Flutter application  
           - ✅ **Backend**: Python-based REST API server
           
           ## 🔗 Links