feat(test): add Vitest setup and example unit test

.github/workflows/test.yml

@@ -0,0 +1,35 @@
+name: Run Example Tests
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test-example:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 20
+          cache: 'pnpm'
+
+      - name: Install pnpm
+        run: npm install -g pnpm
+
+      - name: Install root dependencies (optional if needed)
+        run: pnpm install
+
+      - name: Install example dependencies
+        working-directory: ./example
+        run: pnpm install
+
+      - name: Run example tests
+        working-directory: ./example
+        run: pnpm test

example/package.json

@@ -5,15 +5,22 @@
   "scripts": {
     "dev": "vite",
     "build": "vue-tsc --noEmit && vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest -c vitest.config.ts",
+    "test:ui": "vitest --ui -c vitest.config.ts",
+    "test:watch": "vitest watch -c vitest.config.ts"
   },
   "dependencies": {
     "vue": "^3.5.21"
   },
   "devDependencies": {
+    "@types/node": "^24.9.1",
     "@vitejs/plugin-vue": "^6.0.1",
+    "@vue/test-utils": "^2.4.6",
+    "jsdom": "^27.0.1",
     "typescript": "^5.9.2",
     "vite": "^7.1.11",
+    "vitest": "^4.0.1",
     "vue-tsc": "^3.0.6"
   }
 }