Mobile-only GitHub workflow builds (#975)

* Mobile build only

* Fix copy on debug

* PR review comments

.github/workflows/mobile-release.yml

@@ -0,0 +1,114 @@
+name: Mobile Release
+
+on:
+  push:
+    tags:
+      - 'mobile-v*'
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build Mobile Apps
+    uses: ./.github/workflows/flutter-build.yml
+    secrets: inherit
+
+  release:
+    name: Create Mobile GitHub Release
+    needs: [build]
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Extract version from tag
+        id: version
+        run: |
+          # Strip 'mobile-' prefix to get the version part (e.g., 'mobile-v1.0.0' -> 'v1.0.0')
+          VERSION="${GITHUB_REF_NAME#mobile-}"
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "Extracted version: $VERSION"
+
+      - name: Download Android APK artifact
+        uses: actions/download-artifact@v4.3.0
+        with:
+          name: app-release-apk
+          path: ${{ runner.temp }}/mobile-artifacts
+
+      - name: Download iOS build artifact
+        uses: actions/download-artifact@v4.3.0
+        with:
+          name: ios-build-unsigned
+          path: ${{ runner.temp }}/ios-build
+
+      - name: Prepare release assets
+        run: |
+          set -euo pipefail
+          mkdir -p ${{ runner.temp }}/release-assets
+
+          echo "=== Downloaded artifacts ==="
+          echo "Mobile artifacts:"
+          ls -laR "${{ runner.temp }}/mobile-artifacts" || echo "No mobile-artifacts directory"
+          echo "iOS build:"
+          ls -laR "${{ runner.temp }}/ios-build" || echo "No ios-build directory"
+          echo "==========================="
+
+          # Copy debug APK if it exists
+          if [ -f "${{ runner.temp }}/mobile-artifacts/app-debug.apk" ]; then
+            cp "${{ runner.temp }}/mobile-artifacts/app-debug.apk" \
+               "${{ runner.temp }}/release-assets/sure-${{ steps.version.outputs.version }}-debug.apk"
+            echo "✓ Debug APK prepared"
+          fi
+
+          # Copy release APK if it exists
+          if [ -f "${{ runner.temp }}/mobile-artifacts/app-release.apk" ]; then
+            cp "${{ runner.temp }}/mobile-artifacts/app-release.apk" \
+               "${{ runner.temp }}/release-assets/sure-${{ steps.version.outputs.version }}.apk"
+            echo "✓ Release APK prepared"
+          fi
+
+          # Create iOS app archive (zip the .app bundle)
+          if [ -d "${{ runner.temp }}/ios-build/ios/iphoneos/Runner.app" ]; then
+            cd "${{ runner.temp }}/ios-build/ios/iphoneos"
+            zip -r "${{ runner.temp }}/release-assets/sure-${{ steps.version.outputs.version }}-ios-unsigned.zip" Runner.app
+            echo "✓ iOS build archive prepared"
+          fi
+
+          # Copy iOS build info
+          if [ -f "${{ runner.temp }}/ios-build/ios-build-info.txt" ]; then
+            cp "${{ runner.temp }}/ios-build/ios-build-info.txt" "${{ runner.temp }}/release-assets/"
+          fi
+
+          echo "Release assets:"
+          ls -la "${{ runner.temp }}/release-assets/"
+
+          # Fail early if no assets were produced
+          if [ -z "$(ls -A "${{ runner.temp }}/release-assets/")" ]; then
+            echo "::error::No release assets were produced"
+            exit 1
+          fi
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+          name: "${{ steps.version.outputs.version }} (Mobile)"
+          draft: false
+          prerelease: ${{ contains(github.ref_name, 'alpha') || contains(github.ref_name, 'beta') || contains(github.ref_name, 'rc') }}
+          generate_release_notes: false
+          files: |
+            ${{ runner.temp }}/release-assets/*
+          body: |
+            ## Mobile-Only Release: ${{ steps.version.outputs.version }}
+
+            This is a mobile-only release. It does not include server-side changes.
+
+            ### Downloads
+
+            - **Android APK**: Debug build for testing on Android devices
+            - **iOS Build**: Unsigned iOS build (requires code signing for installation)
+
+            > **Note**: These are builds intended for testing purposes. For production use, please build from source with proper signing credentials.