Fix APK build: use Gradle setup action, generate proper wrapper

The gradlew stub and missing gradle-wrapper.jar caused CI build to fail.
Now uses gradle/actions/setup-gradle@v4 to install Gradle, then generates
wrapper before building. Also renames signed APK and uploads both signed
and unsigned to GitHub Releases.

.github/workflows/build-apk.yml

@@ -31,13 +31,19 @@ jobs:
       - name: Setup Android SDK
         uses: android-actions/setup-android@v3
 
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Generate Gradle wrapper
+        working-directory: android
+        run: |
+          gradle wrapper --gradle-version=8.5
+
       - name: Build APK
         working-directory: android
         run: |
-          # Extract host from APP_URL for Gradle property
           TWA_HOST=$(echo "${{ env.APP_URL }}" | sed 's|https://||;s|http://||;s|/.*||')
-          chmod +x gradlew 2>/dev/null || true
-          ./gradlew assembleRelease -PTWA_HOST="${TWA_HOST}" || echo "::warning::Gradle build failed — ensure Android SDK and gradle wrapper are set up"
+          ./gradlew assembleRelease -PTWA_HOST="${TWA_HOST}"
 
       - name: Sign APK
         if: success()
@@ -49,13 +55,22 @@ jobs:
           alias: ${{ secrets.ANDROID_KEY_ALIAS }}
           keyStorePassword: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
           keyPassword: ${{ secrets.ANDROID_KEY_PASSWORD }}
-        continue-on-error: true
+
+      - name: Rename signed APK
+        if: steps.sign.outcome == 'success'
+        run: |
+          SIGNED=$(find android/app/build/outputs/apk/release -name "*-signed.apk" | head -1)
+          if [ -n "$SIGNED" ]; then
+            cp "$SIGNED" android/app/build/outputs/apk/release/PedScribe-v${{ github.ref_name }}-signed.apk
+          fi
 
       - name: Upload APK to Release
         if: startsWith(github.ref, 'refs/tags/')
         uses: softprops/action-gh-release@v2
         with:
-          files: android/app/build/outputs/apk/release/*.apk
+          files: |
+            android/app/build/outputs/apk/release/*-signed.apk
+            android/app/build/outputs/apk/release/app-release-unsigned.apk
           generate_release_notes: true
 
       - name: Upload artifact
@@ -65,14 +80,12 @@ jobs:
           name: pediatric-scribe-apk
           path: android/app/build/outputs/apk/release/*.apk
           retention-days: 30
-          if-no-files-found: warn
 
       - name: Summary
         run: |
           echo "### TWA APK Build" >> $GITHUB_STEP_SUMMARY
           echo "Built for: ${{ env.APP_URL }}" >> $GITHUB_STEP_SUMMARY
           echo "" >> $GITHUB_STEP_SUMMARY
-          echo "**Obtainium setup:**" >> $GITHUB_STEP_SUMMARY
-          echo "1. Add repo URL: \`https://github.com/ifedan-ed/pediatric-ai-scribe-v3\`" >> $GITHUB_STEP_SUMMARY
-          echo "2. Source: GitHub Releases" >> $GITHUB_STEP_SUMMARY
-          echo "3. APK auto-updates on new \`v*\` tags" >> $GITHUB_STEP_SUMMARY
+          echo "**Install options:**" >> $GITHUB_STEP_SUMMARY
+          echo "- Download from GitHub Releases" >> $GITHUB_STEP_SUMMARY
+          echo "- Obtainium: add repo \`https://github.com/ifedan-ed/pediatric-ai-scribe-v3\`" >> $GITHUB_STEP_SUMMARY