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/monitoring/page.tsx

@@ -1,5 +1,3 @@
-import { Radio } from "lucide-react";
-import Link from "next/link";
 import { getTranslations } from "next-intl/server";
 import { DiagnosticRow, StatusCard } from "@/components/admin/dashboard";
 import { siteSettings } from "@/lib/services/site-settings";
@@ -213,30 +211,8 @@ export default async function AdminRadioMonitoringPage() {
 
 	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/monitoring">{t("monitoring.title")}</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>
 
 			<section className="mt-6">
-				<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">
-						<Radio size={20} className="text-[var(--admin-accent)]" />
-					</div>
-					<div>
-						<h1 className="m-0 text-xl font-extrabold text-[var(--admin-text)]">
-							{t("monitoring.title")}
-						</h1>
-						<p className="m-0 text-xs text-[var(--admin-text-muted)] mt-0.5">
-							{t("monitoring.subtitle", { timeout: FETCH_TIMEOUT_MS / 1000 })}
-						</p>
-					</div>
-				</div>
-
 				<div className="grid grid-cols-[repeat(auto-fit,minmax(180px,1fr))] gap-3.5 mb-6">
 					<StatusCard
 						label={t("monitoring.stream")}