cover TODOs + cross-tab cache

www/app/lib/queryClient.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { QueryClient } from "@tanstack/react-query";
+import { broadcastQueryClient } from "@tanstack/query-broadcast-client-experimental";
 
 export const queryClient = new QueryClient({
   defaultOptions: {
@@ -15,3 +16,8 @@ export const queryClient = new QueryClient({
     },
   },
 });
+
+broadcastQueryClient({
+  queryClient,
+  broadcastChannel: "reflector-query-client",
+});