import React from "react"
import ReactDOM from "react-dom/client"
import { QueryClient, QueryClientProvider } from "@tanstack/react-query"
import App from "./App"
import "./index.css"

// Zentraler Daten-Layer: Caching, Dedup, Retry, Polling pro Query-Hook.
const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      retry: 1,
      refetchOnWindowFocus: false,
      staleTime: 5_000,
    },
  },
})

ReactDOM.createRoot(document.getElementById("root")!).render(
  <React.StrictMode>
    <QueryClientProvider client={queryClient}>
      <App />
    </QueryClientProvider>
  </React.StrictMode>,
)