Add signing configuration for Huawei compatible release builds

.github/workflows/build-and-sign.yml

@@ -0,0 +1,71 @@
+name: Android CI with Release Signing
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build-and-sign:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          cache: gradle
+      
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+      
+      - name: Create signing properties file
+        run: |
+          cat > app/signing.properties << EOF
+          storeFile=../keystore.jks
+          storePassword=${{ secrets.KEYSTORE_PASSWORD }}
+          keyAlias=${{ secrets.ALIAS }}
+          keyPassword=${{ secrets.KEY_PASSWORD }}
+          EOF
+      
+      - name: Restore signing key
+        run: |
+          echo "${{ secrets.SIGNING_KEY }}" | base64 --decode > keystore.jks
+          ls -la keystore.jks
+      
+      - name: Set up signing environment
+        run: |
+          echo "KEYSTORE_PATH=../keystore.jks" >> $GITHUB_ENV
+          echo "KEYSTORE_PASSWORD=${{ secrets.KEYSTORE_PASSWORD }}" >> $GITHUB_ENV
+          echo "ALIAS=${{ secrets.ALIAS }}" >> $GITHUB_ENV
+          echo "KEY_PASSWORD=${{ secrets.KEY_PASSWORD }}" >> $GITHUB_ENV
+          echo "Signing environment variables set"
+      
+      - name: Build release APK
+        run: ./gradlew assembleRelease
+      
+      - name: Sign APK (alternative method)
+        uses: r0adkll/sign-android-release@v1
+        with:
+          releaseDirectory: app/build/outputs/apk/release
+          signingKeyBase64: ${{ secrets.SIGNING_KEY }}
+          alias: ${{ secrets.ALIAS }}
+          keyStorePassword: ${{ secrets.KEYSTORE_PASSWORD }}
+          keyPassword: ${{ secrets.KEY_PASSWORD }}
+      
+      - name: Upload signed APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-release-signed
+          path: app/build/outputs/apk/release/app-release-signed.apk
+      
+      - name: Upload debug APK as fallback
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-debug
+          path: app/build/outputs/apk/debug/app-debug.apk