perf: optimize PageSpeed Insights performance

- Suppress browser source map references to fix 404/SyntaxErrors
- Reduce legacy JS polyfills via browserslist config
- Optimize LCP by refining Hero animations and image sizes
- Implement video lazy loading and reduce SVG animation complexity
- Add preconnect hints for critical origins

package.json

@@ -129,6 +129,11 @@
       "next": "16.1.6"
     }
   },
+  "browserslist": [
+    "last 3 versions",
+    "not dead",
+    "not ie 11"
+  ],
   "peerDependencies": {
     "@remotion/cli": "^4.0.421",
     "@remotion/google-fonts": "^4.0.421",