feat: add custom site name

src/app/layout.tsx

@@ -8,7 +8,7 @@ import { ThemeProvider } from '../components/ThemeProvider';
 const inter = Inter({ subsets: ['latin'] });
 
 export const metadata: Metadata = {
-  title: 'MoonTV',
+  title: process.env.NEXT_PUBLIC_SITE_NAME || 'MoonTV',
   description: '影视聚合',
   manifest: '/manifest.json',
 };

src/app/login/page.tsx

@@ -47,7 +47,7 @@ function LoginPageClient() {
       </div>
       <div className='relative z-10 w-full max-w-md rounded-3xl bg-gradient-to-b from-white/90 via-white/70 to-white/40 dark:from-zinc-900/90 dark:via-zinc-900/70 dark:to-zinc-900/40 backdrop-blur-xl shadow-2xl p-10 dark:border dark:border-zinc-800'>
         <h1 className='text-green-600 tracking-tight text-center text-3xl font-extrabold mb-8 bg-clip-text drop-shadow-sm'>
-          MoonTV
+          {process.env.NEXT_PUBLIC_SITE_NAME || 'MoonTV'}
         </h1>
         <form onSubmit={handleSubmit} className='space-y-8'>
           <div>