Add Android release APK workflow

.forgejo/workflows/release.yml

@@ -0,0 +1,38 @@
+name: Android Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  release-apk:
+    runs-on: android-ci
+    env:
+      GRADLE_VERSION: 8.10.2
+    steps:
+      - name: Check out repository
+        run: |
+          git clone "http://forgejo:3000/${GITHUB_REPOSITORY}.git" .
+          git checkout "$GITHUB_SHA"
+
+      - name: Install tools
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends ca-certificates curl nodejs unzip
+          curl -fsSL "https://services.gradle.org/distributions/gradle-${GRADLE_VERSION}-bin.zip" -o /tmp/gradle.zip
+          unzip -q /tmp/gradle.zip -d /opt
+          ln -s "/opt/gradle-${GRADLE_VERSION}/bin/gradle" /usr/local/bin/gradle
+
+      - name: Build installable APK
+        run: |
+          gradle --no-daemon :app:assembleDebug
+          mkdir -p dist
+          cp app/build/outputs/apk/debug/app-debug.apk "dist/calorie-ai-${GITHUB_REF_NAME}.apk"
+
+      - name: Upload APK artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: calorie-ai-apk
+          path: dist/*.apk

README.md

@@ -21,6 +21,8 @@ gradle :app:assembleDebug
 
 Forgejo Actions builds the debug APK on every push to `main` and uploads it as the `calorie-ai-debug-apk` artifact.
 
+Tagged versions also build an installable APK named `calorie-ai-vX.Y.Z.apk` through the Android Release workflow.
+
 ## AI Endpoint
 
 The app expects an OpenAI-compatible endpoint at: