Add background image and overlay to AdminPage: Implement a full-screen background image with a dark overlay for improved readability, enhancing the visual presentation of the admin interface.

app/admin/page.tsx

@@ -37,6 +37,16 @@ export default async function AdminPage() {
 
   return (
     <main className="min-h-screen bg-black relative">
+      {/* Background Image */}
+      <div
+        className="absolute inset-0 bg-cover bg-center bg-no-repeat"
+        style={{
+          backgroundImage: `url('/got-light.jpg')`,
+        }}
+      >
+        {/* Dark overlay for readability */}
+        <div className="absolute inset-0 bg-gradient-to-b from-black/70 via-black/60 to-black/80"></div>
+      </div>
       <NavigationWrapper />
       <AdminPanel initialPreferences={sitePreferences} />
     </main>