MVP-1: helpdesk core with dashboard, Telegram channel, customer portal

Next.js 16 + Drizzle/SQLite (matching ~/project-claude conventions), SSE-based
realtime updates, admin dashboard with status columns, ticket thread view,
Telegram long-polling integration (inbound + outbound), token-based customer
portal, Docker Compose packaging.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QcXH24ky6zjk2UyK5oZUPH

src/app/(admin)/dashboard/page.tsx

@@ -0,0 +1,7 @@
+import { listTickets } from "@/lib/tickets/service";
+import { TicketBoard } from "./ticket-board";
+
+export default async function DashboardPage() {
+  const tickets = await listTickets();
+  return <TicketBoard initialTickets={tickets} />;
+}