perf(hooks): normalize query keys and add placeholderData to optimize thread loading

surfsense_web/components/layout/ui/sidebar/AllPrivateChatsSidebar.tsx

@@ -109,6 +109,7 @@ export function AllPrivateChatsSidebarContent({
 		queryKey: ["all-threads", searchSpaceId],
 		queryFn: () => fetchThreads(Number(searchSpaceId)),
 		enabled: !!searchSpaceId && !isSearchMode,
+		placeholderData: () => queryClient.getQueryData(["threads", searchSpaceId, { limit: 40 }]),
 	});
 
 	const {

surfsense_web/components/onboarding-tour.tsx

@@ -439,8 +439,8 @@ export function OnboardingTour() {
 
 	// Fetch threads data
 	const { data: threadsData } = useQuery({
-		queryKey: ["threads", searchSpaceId, { limit: 1 }],
-		queryFn: () => fetchThreads(Number(searchSpaceId), 1), // Only need to check if any exist
+		queryKey: ["threads", searchSpaceId, { limit: 40 }], // Same key as layout
+		queryFn: () => fetchThreads(Number(searchSpaceId), 40),
 		enabled: !!searchSpaceId,
 	});