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

next.config.mjs

@@ -8,6 +8,7 @@ const nextConfig = {
     // Make sure entries are not disposed too quickly
     maxInactiveAge: 60 * 1000,
   },
+  productionBrowserSourceMaps: false,
   logging: {
     fetches: {
       fullUrl: true,
@@ -353,4 +354,6 @@ const nextConfig = {
   },
 };
 
-export default withMintelConfig(nextConfig);
+export default withMintelConfig(nextConfig, {
+  hideSourceMaps: true,
+});