put error boundary around the group page

src/app/main.tsx

@@ -1,7 +1,7 @@
 import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
 import './index.css'
-import App from './App.tsx'
+import App from './App'
 
 // I don't consider providing a disabled button to a Tooltip an error.
 // console.error = (message) => {