Clean up admin hub UX: tabs, chrome, and redundant headers.

Wire orphan routes into hub tabs, group Radio into primary/tools rows, show theme/language once on desktop, and remove duplicate page titles under AdminHubChrome.

Co-authored-by: Cursor <[email protected]>

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

@@ -1,5 +1,3 @@
-import { Settings } from "lucide-react";
-import Link from "next/link";
 import { getTranslations } from "next-intl/server";
 import {
 	saveRadioSetting,
@@ -397,28 +395,6 @@ export default async function AdminRadioSettingsPage() {
 
 	return (
 		<main>
-			<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> ·{" "}
-				<Link href="/admin/radio/ranks">{t("ranks")}</Link> ·{" "}
-				<Link href="/admin/radio/history">{t("history")}</Link>
-			</nav>
-
-			<div className="flex items-center gap-3 mb-6">
-				<div className="w-10 h-10 rounded-xl bg-gradient-to-br from-[var(--admin-accent)]/20 to-[var(--admin-accent)]/5 grid place-items-center">
-					<Settings size={20} className="text-[var(--admin-accent)]" />
-				</div>
-				<div>
-					<h1 className="m-0 text-xl font-extrabold text-[var(--admin-text)]">
-						{t("settingsForm.title")}
-					</h1>
-					<p className="m-0 text-xs text-[var(--admin-text-muted)] mt-0.5">
-						{t("settingsForm.subtitle")}
-					</p>
-				</div>
-			</div>
-
 			{dbError ? (
 				<div className="admin-card mb-6">
 					<p className="text-xs theme-text-muted dark:theme-text-muted m-0">