feat(admin): server-safe StatusCard and Import hub polish

Split OnlineUsersWidget from StatusCard, decouple ad delete button, sync badge import to ExternalTexts+WebsiteBadges, add Import section hub with cancelable SSE jobs and upload SQL option.

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

src/app/admin/ads/[id]/page.tsx

@@ -7,7 +7,7 @@ import { updateAd } from "@/actions/admin-ads";
 import { Button } from "@/components/ui/button";
 import { db, WebsiteAds } from "@/lib/db";
 import { canAccess, getAdminContext, PERMS } from "@/lib/permissions";
-import { EditAdDeleteButton } from "../ads-table";
+import { EditAdDeleteButton } from "../edit-ad-delete-button";
 
 export default async function EditAd({
 	params,