perf: defer noncritical home data

components/home/lovart-home.tsx

@@ -479,18 +479,46 @@ export function LovartHome({
   const [deletingProjectId, setDeletingProjectId] = useState<string | null>(null);
   const [typedPreviewText, setTypedPreviewText] = useState("");
   const [previewCursorVisible, setPreviewCursorVisible] = useState(true);
+  const [isSecondaryDataReady, setIsSecondaryDataReady] = useState(false);
   const projectSectionRef = useRef<HTMLDivElement | null>(null);
   const featuredLoadMoreRef = useRef<HTMLDivElement | null>(null);
   const filesRef = useRef<UploadFileItem[]>([]);
 
+  useEffect(() => {
+    if (typeof window === "undefined") {
+      return;
+    }
+
+    const loadSecondaryData = () => setIsSecondaryDataReady(true);
+    const idleWindow = window as Window & {
+      cancelIdleCallback?: (handle: number) => void;
+      requestIdleCallback?: (
+        callback: IdleRequestCallback,
+        options?: IdleRequestOptions
+      ) => number;
+    };
+    if (typeof idleWindow.requestIdleCallback === "function") {
+      const idleId = idleWindow.requestIdleCallback(loadSecondaryData, {
+        timeout: 1200,
+      });
+      return () => idleWindow.cancelIdleCallback?.(idleId);
+    }
+
+    const timer = window.setTimeout(loadSecondaryData, 550);
+    return () => window.clearTimeout(timer);
+  }, []);
+
   const { data: canvasData, mutate: mutateCanvas } = useSWR<{
     success: boolean;
     data: CanvasProject[];
-  }>(isAuthenticated ? "/api/canvas" : null, fetcher);
+  }>(isAuthenticated && isSecondaryDataReady ? "/api/canvas" : null, fetcher);
 
   const { data: featuredPages, size: featuredPageCount, setSize: setFeaturedPageCount, isValidating: isFeaturedValidating } =
     useSWRInfinite<FeaturedResponse>(
       (pageIndex, previousPageData) => {
+        if (!isSecondaryDataReady) {
+          return null;
+        }
         if (
           previousPageData?.pagination &&
           previousPageData.pagination.page >= previousPageData.pagination.totalPages
@@ -508,7 +536,7 @@ export function LovartHome({
     );
 
   const { data: membershipData } = useSWR<MembershipSummaryResponse>(
-    isAuthenticated ? "/api/user/membership-summary" : null,
+    isAuthenticated && isSecondaryDataReady ? "/api/user/membership-summary" : null,
     fetcher
   );
 
@@ -536,10 +564,10 @@ export function LovartHome({
         supportsSeed?: boolean;
       } | null;
     } | null;
-  }>(isAuthenticated ? "/api/models" : null, fetcher);
+  }>(isAuthenticated && isSecondaryDataReady ? "/api/models" : null, fetcher);
 
   const { data: navLinksData } = useSWR<{ links: NavLink[] }>(
-    "/api/nav-links",
+    isSecondaryDataReady ? "/api/nav-links" : null,
     fetcher
   );
 
@@ -570,19 +598,21 @@ export function LovartHome({
   }>("/api/site-settings", fetcher);
 
   const { data: tutorialVideosData } = useSWR<{ videos: TutorialVideo[] }>(
-    siteSettingsData?.tutorialEnabled ? "/api/tutorial-videos" : null,
+    isSecondaryDataReady && siteSettingsData?.tutorialEnabled
+      ? "/api/tutorial-videos"
+      : null,
     fetcher
   );
 
   const { data: authSettingsData } = useSWR<PublicAuthSettings>(
-    "/api/auth-settings",
+    isSecondaryDataReady ? "/api/auth-settings" : null,
     fetcher
   );
   const { data: homeAnimationData } = useSWR<{
     enabled?: boolean;
     htmlContent?: string;
     fileName?: string;
-  }>("/api/home-animation", fetcher);
+  }>(isSecondaryDataReady ? "/api/home-animation" : null, fetcher);
 
   const membershipConfig = membershipData?.config;
   const membershipPlans = membershipConfig?.plans || [];