refactor: replace GSAP animations with CSS animations across components

- Updated RootLayout to include a noise overlay class.
- Refactored LiveModerationFeed to use CSS animations for item entry.
- Simplified AmbientCanvas by removing WebGL and using pure CSS for ambient effects.
- Converted Chatbot to use CSS for floating window animations.
- Updated Card component to include a gradient border.
- Refactored PageTransition to use CSS for fade-scale animations.
- Enhanced SectionHeader with reveal-up animation class.
- Replaced GSAP animations in NavRail with CSS animations for item entry.
- Refactored VoiceStage to use CSS for speaker node animations and pulse rings.
- Removed GSAP dependencies from use-gsap-animation hook, implementing CSS-based stagger reveal.

services/frontend/src/app/(dashboard)/moderation/view.tsx

@@ -1,7 +1,5 @@
 "use client";
 
-import { useGSAP } from "@gsap/react";
-import gsap from "gsap";
 import { AlertTriangle, CheckCircle2, Shield } from "lucide-react";
 import { useEffect, useState } from "react";
 import { useAmbient } from "@/components/ambient/ambient-context";
@@ -29,10 +27,6 @@ import type {
   ModerationStats,
 } from "@/lib/types";
 
-if (typeof window !== "undefined") {
-  gsap.registerPlugin(useGSAP);
-}
-
 export function ModerationView({
   initialStats,
   initialActions,