feat: comprehensive CMS improvements

- Fix DOMPurify SSR crash (use isomorphic-dompurify)
- Fix SanitizedHtml to sanitize by default
- Add auth guards to studio/catalog maintenance pages
- Add update/edit to vouchers CRUD
- Add update/edit to rare-values CRUD
- Add approve workflow to applications page
- Add edit form to guilds detail page
- Add SEO metadata to all public pages (21 pages)
- Fix mobile nav accessibility (focus trap, aria attributes)
- Fix missing labels and table accessibility
- Add dynamic imports for heavy client components (6 components)
- Fix silent error swallowing (40+ locations)
- Add content scheduling for articles (publishAt, status)
- Wire up 12 missing webhook notification triggers
- Add global search to admin panel
- Add bulk actions to admin users table
- Fix JSON formatting and a11y issues

src/components/admin/admin-topbar.tsx

@@ -2,6 +2,7 @@
 
 import { usePathname } from "next/navigation";
 import { useTranslations } from "next-intl";
+import { SearchDialog } from "@/components/admin/search-dialog";
 import { LanguageSwitcher } from "@/components/language-switcher";
 import { ThemeSwitcher } from "@/components/theme-switcher";
 import { findAdminHub } from "@/lib/admin-nav";
@@ -29,6 +30,7 @@ export function AdminTopbar({
 				</span>
 			</div>
 			<div className="flex items-center gap-3">
+				<SearchDialog />
 				<div className="flex items-center gap-1.5 lg:hidden">
 					<LanguageSwitcher variant="admin" />
 					<ThemeSwitcher variant="admin" />