Enable Android APK build with Capacitor and add multi-platform CI/CD

.github/workflows/multi-platform-build.yml

@@ -0,0 +1,204 @@
+name: Multi-Platform Build & Release
+
+on:
+  push:
+    branches:
+      - '**'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - main
+      - master
+
+permissions:
+  contents: write
+
+jobs:
+  # Windows Build
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Package Windows
+        run: npm run package:win
+
+      - name: Upload Windows Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-builds
+          path: |
+            release/*.exe
+            release/*.zip
+          retention-days: 7
+
+  # macOS Build
+  build-macos:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Package macOS
+        run: npm run package:mac
+
+      - name: Upload macOS Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: macos-builds
+          path: |
+            release/*.dmg
+            release/*.zip
+          retention-days: 7
+
+  # Linux Build
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Package Linux
+        run: npm run package:linux
+
+      - name: Upload Linux Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: linux-builds
+          path: release/*.AppImage
+          retention-days: 7
+
+  # Android Build
+  build-android:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build Android
+        run: npm run build:android
+
+      - name: Make gradlew executable
+        run: chmod +x android/gradlew
+
+      - name: Build APK (Debug)
+        run: |
+          cd android
+          ./gradlew assembleDebug
+
+      - name: Upload Android APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: android-builds
+          path: android/app/build/outputs/apk/debug/*.apk
+          retention-days: 7
+
+  # Create Release (only on tags)
+  release:
+    needs: [build-windows, build-macos, build-linux, build-android]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Display structure of downloaded files
+        run: ls -R artifacts
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: |
+            artifacts/windows-builds/*
+            artifacts/macos-builds/*
+            artifacts/linux-builds/*
+            artifacts/android-builds/*
+          draft: false
+          prerelease: false
+          generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  # Create auto release on every push (non-tag)
+  auto-release:
+    needs: [build-windows, build-macos, build-linux, build-android]
+    runs-on: ubuntu-latest
+    if: "!startsWith(github.ref, 'refs/tags/')"
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Create Auto Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: |
+            artifacts/windows-builds/*
+            artifacts/macos-builds/*
+            artifacts/linux-builds/*
+            artifacts/android-builds/*
+          tag_name: build-${{ github.ref_name }}-${{ github.run_number }}
+          name: Build ${{ github.ref_name }} #${{ github.run_number }}
+          body: |
+            🤖 Automated build from commit ${{ github.sha }}
+
+            **Branch:** ${{ github.ref_name }}
+            **Platforms:** Windows, macOS, Linux, Android
+
+            📦 **Downloads:**
+            - Windows: `.exe` installer and portable `.zip`
+            - macOS: `.dmg` installer and `.zip` archive
+            - Linux: `.AppImage` (universal package)
+            - Android: `.apk` (debug build)
+          draft: false
+          prerelease: true
+          target_commitish: ${{ github.sha }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -42,3 +42,12 @@ out/
 
 # TypeScript
 *.tsbuildinfo
+
+# Capacitor
+.capacitor/
+android/build/
+android/.gradle/
+android/app/build/
+android/app/release/
+android/local.properties
+ios/