feat: add GitHub Actions workflow for building and releasing APKs

Author: crim50n

.github/workflows/release.yml

@@ -0,0 +1,69 @@
+name: Build Release APKs
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build-release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/[email protected]
+
+      - name: Extract version from libs.versions.toml
+        id: version
+        run: |
+          VERSION=$(grep 'versionName = ' gradle/libs.versions.toml | sed 's/versionName = "\(.*\)"/\1/')
+          VERSION_CODE=$(grep 'versionCode = ' gradle/libs.versions.toml | sed 's/versionCode = "\(.*\)"/\1/')
+          echo "name=$VERSION" >> $GITHUB_OUTPUT
+          echo "code=$VERSION_CODE" >> $GITHUB_OUTPUT
+          echo "Building version: $VERSION (code: $VERSION_CODE)"
+
+      - name: Set up JDK 17
+        uses: actions/[email protected]
+        with:
+          distribution: 'adopt'
+          java-version: '17'
+
+      - name: Grant execute permissions for gradlew
+        run: chmod +x ./gradlew
+
+      - name: Decode Keystore
+        env:
+          KEYSTORE_BASE64: ${{ secrets.KEYSTORE_BASE64 }}
+        if: ${{ env.KEYSTORE_BASE64 != '' }}
+        run: |
+          mkdir -p app/keystore
+          echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 -d > app/keystore/release.keystore
+          echo "keystore=keystore/release.keystore" > app/keystore/signing.properties
+          echo "keystore.alias=${{ secrets.KEYSTORE_ALIAS }}" >> app/keystore/signing.properties
+          echo "keystore.password=${{ secrets.KEYSTORE_PASSWORD }}" >> app/keystore/signing.properties
+
+      - name: Build Full Release APK
+        run: ./gradlew :app:assembleFullRelease
+
+      - name: Build FOSS Release APK
+        run: ./gradlew :app:assembleFossRelease
+
+      - name: Rename APKs
+        run: |
+          VERSION="${{ steps.version.outputs.name }}"
+          mkdir -p release-apks
+
+          # Full Release
+          if [ -f app/build/outputs/apk/full/release/app-full-release.apk ]; then
+            cp app/build/outputs/apk/full/release/app-full-release.apk release-apks/pdai-full-release-${VERSION}.apk
+          fi
+
+          # FOSS Release
+          if [ -f app/build/outputs/apk/foss/release/app-foss-release.apk ]; then
+            cp app/build/outputs/apk/foss/release/app-foss-release.apk release-apks/pdai-foss-release-${VERSION}.apk
+          fi
+
+      - name: Upload Release APKs
+        uses: actions/upload-artifact@v4
+        with:
+          name: pdai-release-${{ steps.version.outputs.name }}
+          path: release-apks/*.apk
+          retention-days: 90