mc-dashboard/app/providers.tsx

"use client";

import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { SessionProvider } from "next-auth/react";
import { Toaster } from "sonner";
import { useEffect, useState } from "react";

export function Providers({ children }: { children: React.ReactNode }) {
  const [queryClient] = useState(
    () =>
      new QueryClient({
        defaultOptions: {
          queries: {
            refetchOnWindowFocus: false,
          },
        },
      })
  );

  const [theme, setTheme] = useState<"light" | "dark">("dark");
  useEffect(() => {
    const sync = () => {
      setTheme(document.documentElement.classList.contains("dark") ? "dark" : "light");
    };
    sync();
    const obs = new MutationObserver(sync);
    obs.observe(document.documentElement, { attributes: true, attributeFilter: ["class"] });
    return () => obs.disconnect();
  }, []);

  return (
    <SessionProvider>
      <QueryClientProvider client={queryClient}>
        {children}
        <Toaster
          theme={theme}
          position="bottom-right"
          richColors
          closeButton
          toastOptions={{ duration: 4000 }}
        />
      </QueryClientProvider>
    </SessionProvider>
  );
}