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/permissions/permissions-list.tsx

@@ -100,16 +100,10 @@ export function PermissionsList({ ranks: initialRanks }: Props) {
 		<div className="space-y-6">
 			{/* Header */}
 			<div className="flex items-center justify-between">
-				<div>
-					<h1 className="text-3xl font-bold tracking-tight flex items-center gap-2">
-						<ShieldCheck className="h-7 w-7" />
-						Permissions
-					</h1>
-					<p className="text-muted-foreground">
-						{ranks.length} ranks &middot; {totalUsers.toLocaleString()} users
-						total
-					</p>
-				</div>
+				<p className="text-muted-foreground">
+					{ranks.length} ranks &middot; {totalUsers.toLocaleString()} users
+					total
+				</p>
 				<Button onClick={() => setShowCreate(true)}>
 					<Plus className="h-4 w-4 mr-1.5" />
 					New Rank