fix: enforce semantic contrast across admin

src/app/admin/radio/moderation/page.tsx

@@ -41,7 +41,7 @@ export default async function AdminRadioModerationPage() {
 
   return (
     <main>
-      <nav className="text-xs text-gray-500 dark:text-gray-400 mb-2">
+      <nav className="text-xs theme-text-muted dark:theme-text-muted mb-2">
         <Link href="/admin/radio">{t("title")}</Link> ·{" "}
         <Link href="/admin/radio/moderation">{t("moderation")}</Link> ·{" "}
         <Link href="/admin/radio/settings">{t("settings")}</Link> ·{" "}
@@ -85,7 +85,7 @@ export default async function AdminRadioModerationPage() {
                   <td>{String(s.id)}</td>
                   <td>{String(s.userId)}</td>
                   <td>{s.message}</td>
-                  <td className="text-sm text-gray-500 dark:text-gray-400 whitespace-nowrap">
+                  <td className="text-sm theme-text-muted dark:theme-text-muted whitespace-nowrap">
                     {formatDate(s.createdAt)}
                   </td>
                   <td>