open-swe/ui/src/routes/__root.tsx

import { HeadContent, Outlet, Scripts, createRootRoute } from "@tanstack/react-router";
import { TanStackRouterDevtoolsPanel } from "@tanstack/react-router-devtools";
import { TanStackDevtools } from "@tanstack/react-devtools";
import { QueryClientProvider } from "@tanstack/react-query";
import { ReactQueryDevtools } from "@tanstack/react-query-devtools";
import { useState } from "react";

import appCss from "../styles.css?url";
import { makeQueryClient } from "@/lib/query";

export const Route = createRootRoute({
  head: () => ({
    meta: [
      { charSet: "utf-8" },
      { name: "viewport", content: "width=device-width, initial-scale=1" },
      { title: "open-swe" },
    ],
    links: [{ rel: "stylesheet", href: appCss }],
  }),
  notFoundComponent: () => (
    <main className="container mx-auto p-4 pt-16">
      <h1 className="text-2xl font-medium">404</h1>
      <p className="text-muted-foreground">The requested page could not be found.</p>
    </main>
  ),
  shellComponent: RootDocument,
});

function RootDocument({ children }: { children: React.ReactNode }) {
  const [queryClient] = useState(() => makeQueryClient());
  return (
    <html lang="en">
      <head>
        <HeadContent />
      </head>
      <body>
        <QueryClientProvider client={queryClient}>
          {children ?? <Outlet />}
          <TanStackDevtools
            config={{ position: "bottom-right" }}
            plugins={[
              { name: "Tanstack Router", render: <TanStackRouterDevtoolsPanel /> },
            ]}
          />
          <ReactQueryDevtools initialIsOpen={false} />
        </QueryClientProvider>
        <Scripts />
      </body>
    </html>
  );
}