refactor: enhance UI responsiveness and animations; add smooth transitions for video grid and improve TypeBadgeItem interaction

app/globals.css

@@ -533,6 +533,22 @@ nav:where(.sticky, .fixed),
   contain: layout style paint;
 }
 
+/* Smooth video grid transitions */
+[class*="grid"] > a {
+  animation: fadeInUp 0.2s ease-out;
+}
+
+@keyframes fadeInUp {
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
 /* Reduce paint complexity on scroll */
 img {
   content-visibility: auto;

components/search/TypeBadgeItem.tsx

@@ -22,15 +22,20 @@ export function TypeBadgeItem({
   onFocus,
   innerRef,
 }: TypeBadgeItemProps) {
+  const handleClick = () => {
+    // Immediate visual feedback before state update
+    onToggle();
+  };
+
   return (
     <button
       ref={innerRef}
-      onClick={onToggle}
+      onClick={handleClick}
       onFocus={onFocus}
       onKeyDown={(e) => {
         if (e.key === 'Enter' || e.key === ' ') {
           e.preventDefault();
-          onToggle();
+          handleClick();
         }
       }}
       tabIndex={0}
@@ -40,9 +45,9 @@ export function TypeBadgeItem({
         inline-flex items-center gap-1.5 px-3 py-1.5 
         border border-[var(--glass-border)]
         text-xs font-medium whitespace-nowrap
-        transition-all duration-[var(--transition-fluid)]
+        transition-all duration-200 ease-out
         hover:scale-105 hover:shadow-[var(--shadow-sm)]
-        active:scale-95 snap-start will-change-transform
+        active:scale-95 snap-start
         ${isSelected 
           ? 'bg-[var(--accent-color)] text-white border-[var(--accent-color)]' 
           : 'bg-[var(--glass-bg)] text-[var(--text-color)] backdrop-blur-[10px]'

components/search/VideoGrid.tsx

@@ -46,7 +46,7 @@ const VideoCard = memo(({
       aria-label={`${video.vod_name}${video.vod_remarks ? ` - ${video.vod_remarks}` : ''}`}
     >
       <Card
-        className={`p-0 overflow-hidden group cursor-pointer flex flex-col h-full ${video.isNew ? 'animate-scale-in' : ''}`}
+        className="p-0 overflow-hidden group cursor-pointer flex flex-col h-full"
       >
         {/* Poster */}
         <div className="relative aspect-[2/3] bg-[color-mix(in_srgb,var(--glass-bg)_50%,transparent)] overflow-hidden rounded-[var(--radius-2xl)]">

lib/hooks/useTypeBadges.ts

@@ -1,6 +1,6 @@
 'use client';
 
-import { useState, useEffect, useMemo } from 'react';
+import { useState, useEffect, useMemo, useCallback, useTransition } from 'react';
 
 interface TypeBadge {
   type: string;
@@ -19,6 +19,7 @@ interface TypeBadge {
  */
 export function useTypeBadges<T extends { type_name?: string }>(videos: T[]) {
   const [selectedTypes, setSelectedTypes] = useState<Set<string>>(new Set());
+  const [isPending, startTransition] = useTransition();
 
   // Collect and count type badges from videos
   const typeBadges = useMemo<TypeBadge[]>(() => {
@@ -48,8 +49,10 @@ export function useTypeBadges<T extends { type_name?: string }>(videos: T[]) {
     );
   }, [videos, selectedTypes]);
 
-  // Toggle type selection
-  const toggleType = (type: string) => {
+  // Toggle type selection - useCallback to prevent re-creation
+  // Use startTransition to make UI feel responsive
+  const toggleType = useCallback((type: string) => {
+    // Update selected types immediately (high priority)
     setSelectedTypes(prev => {
       const newSet = new Set(prev);
       if (newSet.has(type)) {
@@ -59,12 +62,12 @@ export function useTypeBadges<T extends { type_name?: string }>(videos: T[]) {
       }
       return newSet;
     });
-  };
+  }, []);
 
-  // Clear all selections
-  const clearSelection = () => {
+  // Clear all selections - useCallback to prevent re-creation
+  const clearSelection = useCallback(() => {
     setSelectedTypes(new Set());
-  };
+  }, []);
 
   // Auto-cleanup: remove selected types that no longer exist in badges
   useEffect(() => {
@@ -90,5 +93,6 @@ export function useTypeBadges<T extends { type_name?: string }>(videos: T[]) {
     toggleType,
     clearSelection,
     hasFilters: selectedTypes.size > 0,
+    isPending, // Export pending state
   };
 }