TanStack Query v5 (React)

<quick_reference>

Setup

import { QueryClient, QueryClientProvider } from '@tanstack/react-query'

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      staleTime: 60 * 1000, // 1 min (default is 0)
      gcTime: 5 * 60 * 1000, // 5 min (default)
      retry: 3,              // 3 retries with exponential backoff (default)
      refetchOnWindowFocus: true, // default
    },
  },
})