CI: replace broken per-commit Android APK build with a fast compile check

build-and-test.yml built a full APK on every master push without running
sync-android-sources.sh, so it used the wrong (Tauri-default) sources, was
unsigned, and duplicated the ~15min build that build-release.yml does properly
on tags. Replace it with cargo check --target aarch64-linux-android (~1min),
which catches Android Rust breakage without linking, bundling, or signing.
The signed release APK remains a tag-only artifact from build-release.yml.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitea/workflows/build-and-test.yml

@@ -60,16 +60,24 @@ jobs:
           cargo test
           cd ..
 
-  build:
+  # Fast per-commit Android compile check. This does NOT build a shippable APK:
-    name: Build Android APK
+  # the full signed release APK is built only on tag pushes by build-release.yml
+  # (which runs sync-android-sources.sh + signing). Running the full bundle here
+  # too would duplicate a ~15min build and, without the sync step, produced an
+  # unsigned APK missing our custom sources/icons/proguard rules anyway.
+  # `cargo check` for the Android target (~1min) catches Android-specific Rust
+  # breakage without linking, bundling, or signing.
+  android-check:
+    name: Android Compile Check
     runs-on: linux/amd64
     needs: test
     container:
       image: gitea.tourolle.paris/dtourolle/jellytau-builder:latest
     env:
       ANDROID_HOME: /opt/android-sdk
-      NDK_VERSION: 27.0.11902837
+      ANDROID_SDK_ROOT: /opt/android-sdk
       NDK_HOME: /opt/android-sdk/ndk/27.0.11902837
+      ANDROID_NDK_HOME: /opt/android-sdk/ndk/27.0.11902837
 
     steps:
       - name: Checkout repository
@@ -97,42 +105,13 @@ jobs:
             ${{ runner.os }}-bun-
 
       - name: Install dependencies
-        run: |
+        run: bun install
-          bun install
 
-      - name: Build frontend
+      - name: Cargo check (aarch64-linux-android)
-        run: bun run build
-
-      - name: Ensure Android NDK
-        run: |
-          if [ ! -d "$NDK_HOME" ]; then
-            echo "NDK not found at $NDK_HOME, installing ndk;$NDK_VERSION"
-            yes | "$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager" --sdk_root="$ANDROID_HOME" "ndk;$NDK_VERSION"
-          fi
-          echo "Using NDK at $NDK_HOME"
-          ls "$NDK_HOME"
-
-      - name: Initialize Android project
         run: |
+          TC="$NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin"
+          export CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER="$TC/aarch64-linux-android24-clang"
+          export CC_aarch64_linux_android="$TC/aarch64-linux-android24-clang"
+          export AR_aarch64_linux_android="$TC/llvm-ar"
           cd src-tauri
-          echo "" | bunx tauri android init
+          cargo check --target aarch64-linux-android --lib
-          cd ..
-
-      - name: Build Android APK
-        id: build
-        run: |
-          mkdir -p artifacts
-          bun run tauri android build --apk true --target aarch64
-
-          # Find the generated APK file
-          ARTIFACT=$(find src-tauri/gen/android/app/build/outputs/apk -name "*.apk" -type f -print -quit)
-          echo "artifact=${ARTIFACT}" >> $GITHUB_OUTPUT
-          echo "Found artifact: ${ARTIFACT}"
-
-      - name: Upload build artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: jellytau-apk
-          path: ${{ steps.build.outputs.artifact }}
-          retention-days: 30
-          if-no-files-found: error