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)/draw-badge/page.tsx

@@ -1,4 +1,5 @@
 import { desc, eq } from "drizzle-orm";
+import type { Metadata } from "next";
 import { redirect } from "next/navigation";
 import { buyBadge } from "@/actions/draw-badge";
 import { ContentCard, EmptyState, StatBlock } from "@/components/public/ui";
@@ -10,7 +11,15 @@ import { siteSettings } from "@/lib/services/site-settings";
 // Reads the live users + website_drawbadges tables and writes credits/badges on
 // purchase — must never be statically rendered.
 
-export const metadata = { title: "Draw a Badge" };
+export const metadata: Metadata = {
+	title: "Draw a Badge",
+	description: "Draw a random badge and add it to your collection.",
+	openGraph: {
+		title: "Draw a Badge",
+		description: "Draw a random badge and add it to your collection.",
+		type: "website",
+	},
+};
 
 const DEFAULT_PRICE = 50;