Fix theme consistency, i18n completeness, CSS variable naming, and hardcoded strings

src/app/admin/radio/api-keys/page.tsx

@@ -119,7 +119,7 @@ export default async function AdminRadioApiKeysPage() {
           {t("apiKeysForm.generateHint")}
         </p>
         <form action={createApiKey} className="admin-card">
-          <div className="grid cols-2">
+          <div className="grid grid-cols-1 gap-4 md:grid-cols-2">
             <div>
               <label htmlFor="new_name" style={{ display: "block", fontWeight: 700 }}>
                 {t("apiKeysForm.name")}