App.tsx

import MainPage from './page/MainPage';

import './App.less';

function App() {
  return (
    <>
      <MainPage />
    </>
  );
}

export default App;

Main.tsx

import { StrictMode } from 'react';
import { createRoot } from 'react-dom/client';
import App from './App.tsx';

import './index.less';

createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <App />
  </StrictMode>
);