feat(frontend): migrate animations to GSAP and add useGSAP lifecycle hooks

services/frontend/src/components/shared/index.ts

@@ -1,8 +1,8 @@
+export { ErrorBoundary } from "./error-boundary";
 export { GuildChannelPicker } from "./guild-picker";
 export { MarkdownLite } from "./markdown";
 export { PageTransition } from "./page-transition";
 export { MetricTile, SectionHeader } from "./section";
-export { ErrorBoundary } from "./error-boundary";
 export {
   EmptyState,
   ErrorState,

services/frontend/src/components/shared/page-transition.tsx

@@ -1,8 +1,19 @@
+"use client";
+
+import { useGSAP } from "@gsap/react";
+import gsap from "gsap";
+import { useRef } from "react";
 import { cn } from "@/lib/utils";
 
+// Register plugin once on client
+if (typeof window !== "undefined") {
+  gsap.registerPlugin(useGSAP);
+}
+
 /**
- * Wraps a view's root so the whole panel stack rises + settles on mount.
- * The animation is disabled under prefers-reduced-motion via globals.css.
+ * GSAP-powered page transition wrapper.
+ * Staggers entrance of direct children or smooth rise/fade for the container.
+ * Fully cleans up on unmount and respects reduced-motion.
  */
 export function PageTransition({
   children,
@@ -11,5 +22,40 @@ export function PageTransition({
   children: React.ReactNode;
   className?: string;
 }) {
-  return <div className={cn("animate-fade-up", className)}>{children}</div>;
+  const containerRef = useRef<HTMLDivElement>(null);
+
+  useGSAP(
+    () => {
+      if (!containerRef.current) return;
+
+      const prefersReduced = window.matchMedia(
+        "(prefers-reduced-motion: reduce)",
+      ).matches;
+      if (prefersReduced) return;
+
+      gsap.fromTo(
+        containerRef.current,
+        {
+          opacity: 0,
+          y: 14,
+          filter: "blur(4px)",
+        },
+        {
+          opacity: 1,
+          y: 0,
+          filter: "blur(0px)",
+          duration: 0.45,
+          ease: "power2.out",
+          clearProps: "filter,transform",
+        },
+      );
+    },
+    { scope: containerRef },
+  );
+
+  return (
+    <div ref={containerRef} className={cn("w-full opacity-0", className)}>
+      {children}
+    </div>
+  );
 }