Polish admin hub pages: drop duplicate headers, align CTAs and empties.

Remove redundant titles under AdminHubChrome, style events/polls create flows with admin chrome + i18n, and standardize empty states / teams form classes.

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

src/app/admin/media/page.tsx

@@ -1,4 +1,3 @@
-import { getTranslations } from "next-intl/server";
 import { AdminMediaGrid } from "@/components/admin/media-grid";
 import { redirect } from "next/navigation";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
@@ -9,18 +8,8 @@ export default async function AdminMediaPage() {
 		redirect("/admin");
 	}
 
-	const t = await getTranslations("pages.admin.media");
-
 	return (
 		<main>
-			<div className="mb-6">
-				<h1 className="m-0 text-2xl font-extrabold text-[var(--admin-text)]">
-					{t("title")}
-				</h1>
-				<p className="m-0 text-sm text-[var(--admin-text-muted)] mt-1">
-					{t("subtitle")}
-				</p>
-			</div>
 			<AdminMediaGrid />
 		</main>
 	);