Refactor imports and improve layout in various components; update styles for consistency and readability.

frontend/vite-template-master/src/main.tsx

@@ -1,4 +1,6 @@
 import ReactDOM from 'react-dom/client';
 import App from './App';
+
 import '@mantine/carousel/styles.css';
+
 ReactDOM.createRoot(document.getElementById('root')!).render(<App />);