Revert "feat: add custom site name"

This reverts commit 6d71fde9ee.

src/components/MobileHeader.tsx

@@ -2,13 +2,9 @@
 
 import Link from 'next/link';
 
-import { useSiteName } from './SiteNameContext';
 import { ThemeToggle } from './ThemeToggle';
 
-export const dynamic = 'force-dynamic';
-
 const MobileHeader = () => {
-  const siteName = useSiteName();
   return (
     <header className='md:hidden relative w-full bg-white/70 backdrop-blur-xl border-b border-gray-200/50 shadow-sm dark:bg-gray-900/70 dark:border-gray-700/50'>
       <div className='h-12 flex items-center justify-center'>
@@ -16,7 +12,7 @@ const MobileHeader = () => {
           href='/'
           className='text-2xl font-bold text-green-600 tracking-tight hover:opacity-80 transition-opacity'
         >
-          {siteName}
+          MoonTV
         </Link>
       </div>
       <div className='absolute top-1/2 right-4 -translate-y-1/2'>