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;