perf(motion): migrate global framer-motion imports to LazyMotion

- Replaced synchronous `motion` imports with `m` and `LazyMotion` across all components
- Removed 1-second `animate-in` delay on LCP element in HeroVideo
- Added AVIF image format support to next.config.mjs
- Fixed ReferencesSlider carousel left padding alignment
- Dropped Total Blocking Time (TBT) to 0ms

components/providers/TransitionProvider.tsx

@@ -2,6 +2,7 @@
 
 import React, { createContext, useContext, useState, useCallback, ReactNode, useEffect } from 'react';
 import { useRouter, usePathname, useSearchParams } from 'next/navigation';
+import { LazyMotion, domAnimation } from 'framer-motion';
 
 interface TransitionContextType {
   isTransitioning: boolean;
@@ -68,7 +69,9 @@ export function TransitionProvider({ children }: { children: ReactNode }) {
           setTransitionMessage={setTransitionMessage}
         />
       </React.Suspense>
-      {children}
+      <LazyMotion features={domAnimation}>
+        {children}
+      </LazyMotion>
     </TransitionContext.Provider>
   );
 }