add old frontend code back

frontend/src/App.tsx

@@ -0,0 +1,21 @@
+// App.jsx
+import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
+import MainLayout from './layouts/MainLayout';
+import ClipUpload from './pages/ClipUpload';
+import ClipEdit from './pages/ClipEdit';
+
+
+function App() {
+    return (
+        <Router>
+            <Routes>
+                <Route element={<MainLayout />}>
+                    <Route path="/create" element={<ClipUpload />} />
+                    <Route path="/create/:id" element={<ClipEdit />} />
+                </Route>
+            </Routes>
+        </Router>
+    );
+}
+
+export default App;