timeline db and react query

apps/web/src/routes/__root.tsx

@@ -8,9 +8,12 @@ import { TanStackRouterDevtools } from "@tanstack/react-router-devtools";
 
 import Header from "../components/header";
 import appCss from "../index.css?url";
+import type { QueryClient } from "@tanstack/react-query";
 import { Toaster } from "@/components/ui/sonner";
 
-export interface RouterAppContext {}
+export interface RouterAppContext {
+  queryClient: QueryClient;
+}
 
 export const Route = createRootRouteWithContext<RouterAppContext>()({
   head: () => ({