fix: enforce semantic contrast across admin

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

@@ -216,7 +216,7 @@ export default async function AdminRadioSettingsPage() {
 
   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/settings">{t("settings")}</Link> ·{" "}
         <Link href="/admin/radio/banners">{t("banners.title")}</Link> ·{" "}
@@ -236,7 +236,7 @@ export default async function AdminRadioSettingsPage() {
 
       {dbError ? (
         <div className="admin-card mb-6">
-          <p className="text-xs text-gray-500 dark:text-gray-400 m-0">{t("settingsForm.dbError")}</p>
+          <p className="text-xs theme-text-muted dark:theme-text-muted m-0">{t("settingsForm.dbError")}</p>
         </div>
       ) : (
         <div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
@@ -289,7 +289,7 @@ export default async function AdminRadioSettingsPage() {
                     style={{ width: "100%" }}
                   />
                   {field.comment ? (
-                    <p className="text-xs text-gray-500 dark:text-gray-400" style={{ margin: "0.2rem 0 0" }}>
+                    <p className="text-xs theme-text-muted dark:theme-text-muted" style={{ margin: "0.2rem 0 0" }}>
                       {field.comment}
                     </p>
                   ) : null}