style: update admin layout for improved responsiveness

app/admin/layout.tsx

@@ -35,7 +35,7 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
   }
 
   return (
-    <div className="container mx-auto px-4 py-8">
+    <div className="w-full max-w-6xl mx-auto px-4 sm:px-6 py-8">
       <div className="mb-8 flex items-center justify-between">
         <h1 className="text-2xl font-bold text-neutral-900 dark:text-white">Pulse Admin</h1>
       </div>