feat: replace MovingGradient with Aurora WebGL background

src/components/layout/AppShell/AppShell.tsx

@@ -28,7 +28,7 @@ import TicketNotificationBell from '@/components/TicketNotificationBell';
 
 import { MobileBottomNav } from './MobileBottomNav';
 import { AppHeader } from './AppHeader';
-import { MovingGradient } from './MovingGradient';
+import { Aurora } from './Aurora';
 
 import { slideUp, slideUpTransition } from '@/components/motion/transitions';
 
@@ -363,7 +363,7 @@ export function AppShell({ children }: AppShellProps) {
   return (
     <div className="min-h-screen">
       {/* Animated background */}
-      <MovingGradient />
+      <Aurora />
 
       {/* Global components */}
       <WebSocketNotifications />