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/app/(site)/developers/page.tsx

@@ -1,9 +1,18 @@
+import type { Metadata } from "next";
 import { ContentCard } from "@/components/public/ui";
 
 // Public API documentation. Static, hand-maintained from the routes that
 // actually exist under src/app/api — keep this in sync when endpoints change.
 
-export const metadata = { title: "API" };
+export const metadata: Metadata = {
+	title: "Developers",
+	description: "Public API documentation for the hotel.",
+	openGraph: {
+		title: "Developers",
+		description: "Public API documentation for the hotel.",
+		type: "website",
+	},
+};
 
 type Method = "GET" | "POST" | "DELETE";