add error/loading/404 boundaries, responsive tables, Metadata API

src/app/[locale]/support/page.tsx

@@ -24,6 +24,11 @@ import { TicketCategoryLabel } from "@/components/support/ticket-category-label"
  * having recent activity, but we don't sort by status; that's a
  * filter the admin can add later if the queue grows.
  */
+export async function generateMetadata() {
+  const t = await getTranslations("common");
+  return { title: t("support") };
+}
+
 export default async function SupportListPage() {
   const user = await getSessionUser();
   if (!user) redirect("/login");