feat(admin): unified ticket inbox over CMS and help-center queues

Merged read-model inbox at /admin/tickets and /mod/tickets with type badges and deep links; CMS-only lists moved to /desk. No DB schema merge.

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

src/app/mod/layout.tsx

@@ -2,7 +2,6 @@ import { eq } from "drizzle-orm";
 import {
 	Ban,
 	Gavel,
-	LifeBuoy,
 	LogOut,
 	Radio,
 	Shield,
@@ -73,12 +72,6 @@ export default async function ModLayout({ children }: { children: ReactNode }) {
 			icon: Ticket,
 			show: showTickets,
 		},
-		{
-			href: "/mod/help-tickets",
-			label: t("nav.helpTickets"),
-			icon: LifeBuoy,
-			show: showTickets,
-		},
 		{
 			href: "/mod/actions",
 			label: t("nav.actions"),