Refactor Admin and Settings UI to Ethereal Precision aesthetic and improve note import/export functionality

memento-note/app/(admin)/admin/settings/page.tsx

@@ -6,11 +6,9 @@ export default async function AdminSettingsPage() {
   const config = await getSystemConfig()
 
   return (
-    <div className="space-y-6">
+    <div className="space-y-8">
       <SettingsHeader />
-      <div className="bg-white dark:bg-zinc-900 rounded-lg shadow overflow-hidden border border-gray-200 dark:border-gray-800 p-6">
-        <AdminSettingsForm config={config} />
-      </div>
+      <AdminSettingsForm config={config} />
     </div>
   )
 }