新增 CI：自动 analyze/test（含 example）

.github/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: Flutter CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  analyze-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+
+      - name: Flutter Version
+        run: flutter --version
+
+      - name: Pub Get (root)
+        run: flutter pub get
+
+      - name: Analyze (root)
+        run: flutter analyze
+
+      - name: Test (root)
+        run: flutter test --coverage
+
+      - name: Pub Get (example)
+        run: flutter pub get
+        working-directory: example
+
+      - name: Analyze (example)
+        run: flutter analyze
+        working-directory: example
+
+      - name: Test (example)
+        run: flutter test
+        working-directory: example
+