fire-planner/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 './index.css';
import { App } from '@/App';

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

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

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