复现已有算法

frontend/web_app/src/App.jsx

@@ -0,0 +1,17 @@
+import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
+import HomePage from './pages/HomePage';
+import './App.css';
+
+function App() {
+  return (
+    <BrowserRouter>
+      <Routes>
+        <Route path="/" element={<HomePage />} />
+        {/* SPA 回退：未匹配路由统一回到首页 */}
+        <Route path="*" element={<Navigate to="/" replace />} />
+      </Routes>
+    </BrowserRouter>
+  );
+}
+
+export default App;