fix: enforce semantic contrast across admin

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

@@ -43,7 +43,7 @@ export default async function AdminRadioEmbedPage() {
 
   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/embed">{t("embed")}</Link> ·{" "}
@@ -83,7 +83,7 @@ export default async function AdminRadioEmbedPage() {
       {!hasStream ? (
         <section className="mt-6">
           <h2 className="admin-section-title">{t("embedPage.noStreamUrl")}</h2>
-          <p className="text-xs text-gray-500 dark:text-gray-400">{t("embedPage.noStreamUrlText")}</p>
+          <p className="text-xs theme-text-muted dark:theme-text-muted">{t("embedPage.noStreamUrlText")}</p>
           <p>
             <Link href="/admin/radio/settings" className="btn btn-primary">
               {t("embedPage.goToSettings")}
@@ -94,14 +94,14 @@ export default async function AdminRadioEmbedPage() {
         <>
           <section className="mt-6">
             <h2 className="admin-section-title">{t("embedPage.livePreview")}</h2>
-            <p className="text-xs text-gray-500 dark:text-gray-400">{t("embedPage.livePreviewText")}</p>
+            <p className="text-xs theme-text-muted dark:theme-text-muted">{t("embedPage.livePreviewText")}</p>
             <div className="admin-card">
               {}
               <audio controls preload="none" src={streamUrl} style={{ width: "100%" }}>
                 {t("embedPage.audioUnsupported")}
               </audio>
               <p
-                className="text-xs text-gray-500 dark:text-gray-400"
+                className="text-xs theme-text-muted dark:theme-text-muted"
                 style={{ margin: "0.5rem 0 0", wordBreak: "break-all" }}
               >
                 {t("embedPage.source")}: <code>{streamUrl}</code>