Enhance UI components and animations: Introduce a shimmer animation effect in globals.css, refactor FeedbackPageClient, LoginPage, RegisterPage, and AdminPanel components to utilize new UI components for improved consistency and maintainability. Update event and feedback handling in EventsPageSection and FeedbackModal, ensuring a cohesive user experience across the application.

components/Leaderboard.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { useEffect, useState } from "react";
-import Avatar from "./Avatar";
+import { Avatar } from "@/components/ui";
 
 interface LeaderboardEntry {
   rank: number;