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/polls/page.tsx

@@ -43,13 +43,7 @@ export default async function PollsPage({
 
 	return (
 		<div className="space-y-6">
-			<div className="flex items-center justify-between">
-				<div>
-					<h1 className="text-3xl font-bold tracking-tight">Polls</h1>
-					<p className="text-muted-foreground">
-						Manage community polls and surveys
-					</p>
-				</div>
+			<div className="flex justify-end">
 				<Button asChild>
 					<Link href="/admin/polls/create">New Poll</Link>
 				</Button>