ci: add macOS arm64 workflow

.gitea/workflows/electron-macos-arm64.yml

@@ -0,0 +1,51 @@
+name: electron-macos-arm64
+
+on:
+  push:
+    branches: [ main ]
+    tags: [ 'v*' ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  electron-macos-arm64:
+    runs-on: macos-arm64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install npm dependencies
+        run: |
+          set -eu
+          npm ci
+
+      - name: Build macOS app bundle (arm64)
+        run: |
+          set -eu
+          npx electron-builder --mac zip --arm64 --publish never
+
+      - name: Pack artifacts
+        run: |
+          set -eu
+          rm -rf artifacts
+          mkdir -p artifacts
+          found=0
+          for f in dist/*.zip dist/*.dmg; do
+            if [ -f "$f" ]; then
+              cp "$f" "artifacts/"
+              found=1
+            fi
+          done
+          [ "$found" -eq 1 ] || { echo "No macOS artifacts produced in dist/"; exit 1; }
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: electron_tray_demo-macos-arm64-run${{ github.run_number }}
+          path: artifacts/
+          retention-days: 14