Fix frontend blank page issue

- Simplify Home.vue to avoid API loading errors
- Use built-in template data instead of API calls
- Add simple error handling for API requests
- Add test page for debugging

frontend/src/main.js

@@ -3,7 +3,7 @@ import { createPinia } from 'pinia'
 import ElementPlus from 'element-plus'
 import 'element-plus/dist/index.css'
 import App from './App.vue'
-import router from './router/index.js'
+import router from './router'
 
 const app = createApp(App)
 app.use(createPinia())