feat(web): adminRequests cache key + staleTime polish

- qk.adminRequests defaults to status='all' when no filter is set; the unfiltered
  endpoint returns every status, so caching it as 'pending' was a latent mismatch.
- 60s staleTime on lidarrConfig + myRequests — both are session-stable enough
  that refetching on every consumer-page mount produced needless flicker.

web/src/lib/api/requests.ts

@@ -62,6 +62,7 @@ export async function cancelRequest(id: string): Promise<LidarrRequest> {
 export function createMyRequestsQuery() {
   return createQuery({
     queryKey: qk.myRequests(),
-    queryFn: listMyRequests
+    queryFn: listMyRequests,
+    staleTime: 60_000
   });
 }