Remove createRoot from App component and export App only

cgen-23993868eff84b468bd514bbed828e5d

client/App.tsx

@@ -111,4 +111,4 @@ const App = () => (
   </QueryClientProvider>
 );
 
-createRoot(document.getElementById("root")!).render(<App />);
+export default App;

client/main.tsx

@@ -0,0 +1,15 @@
+import { StrictMode } from 'react';
+import { createRoot } from 'react-dom/client';
+import App from './App';
+
+const container = document.getElementById('root');
+if (!container) {
+  throw new Error('Root element not found');
+}
+
+const root = createRoot(container);
+root.render(
+  <StrictMode>
+    <App />
+  </StrictMode>
+);