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

docker-compose.yml

@@ -0,0 +1,16 @@
+services:
+  app:
+    build: .
+    ports:
+      - "8081:8081"
+    env_file:
+      - .env
+    environment:
+      - PORT=8081
+      - DATA_DIR=/data
+    volumes:
+      - data:/data
+    restart: unless-stopped
+
+volumes:
+  data: