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/actions/admin-applications.ts

@@ -22,3 +22,19 @@ export async function dismissApplication(formData: FormData): Promise<void> {
 
 	revalidatePath("/admin/applications");
 }
+
+export async function approveApplication(formData: FormData): Promise<void> {
+	await requirePermission(PERMS.USERS_EDIT);
+	const id = formPositiveBigInt(formData, "id");
+	if (!id) return;
+
+	try {
+		await db
+			.delete(WebsiteStaffApplications)
+			.where(eq(WebsiteStaffApplications.id, id));
+	} catch {
+		// already gone / no DB — nothing to do
+	}
+
+	revalidatePath("/admin/applications");
+}