mimic/frontend/src/main.tsx

import { StrictMode } from 'react';
import { createRoot } from 'react-dom/client';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { BrowserRouter } from 'react-router-dom';
import { App } from './App';
import { AuthProvider } from './hooks/useAuth';
import { ToastProvider } from './hooks/useToast';
import './styles/index.css';

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      retry: 1,
      refetchOnWindowFocus: false,
      staleTime: 30_000,
    },
  },
});

const root = document.getElementById('root');
if (!root) throw new Error('Missing #root element');

createRoot(root).render(
  <StrictMode>
    <QueryClientProvider client={queryClient}>
      <BrowserRouter>
        <ToastProvider>
          <AuthProvider>
            <App />
          </AuthProvider>
        </ToastProvider>
      </BrowserRouter>
    </QueryClientProvider>
  </StrictMode>,
);