perf: convert Hero to server component for faster LCP

- Hero now renders server-side, eliminating JS dependency for LCP text
- CMS messages fetched server-side instead of client useEffect
- Removes Hero from client JS bundle (~5KB less)
- LCP element (hero paragraph) now in initial HTML response
- Eliminates 2,380ms 'element rendering delay' reported by PSI

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/_ui/HomePage.tsx

@@ -41,7 +41,7 @@ export default function HomePage() {
       {/* Spacer to prevent navbar overlap */}
       <div className="h-16 sm:h-24 md:h-32" aria-hidden="true"></div>
       <main className="relative">
-        <Hero />
+        <Hero locale="en" />
 
         {/* Wavy Separator 1 - Hero to About */}
         <div className="relative h-12 sm:h-16 md:h-24 overflow-hidden">