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/ui/decorations/StratumLines.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { motion, useInView } from 'framer-motion';
+import { useInView, m, LazyMotion, domAnimation } from 'framer-motion';
 import { useRef } from 'react';
 
 /**
@@ -73,7 +73,7 @@ export function StratumLines({
         {LINES.map((line, i) => {
           const isFromRight = placement.includes('right') ? !line.fromRight : line.fromRight;
           return (
-            <motion.div
+            <m.div
               key={i}
               style={{
                 width: `${line.width}%`,