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

postcss.config.mjs

@@ -0,0 +1,7 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;