- Create Hub with register/unregister/broadcast, room/user index
- Create Client with readPump/writePump goroutines, 30s ping keepalive
- Define all 18 incoming + 18 outgoing message types matching Rust protocol
- Add ValidateChatToken to ChatService for JWT validation
- Update WSUrl from /ws to /api/v1/ws
- Register GET /api/v1/ws endpoint in router
- Create ChatWebSocketHandler for WebSocket upgrade and auth
- Added GetStats method to ChatService with database access
- Returns active_users (distinct users who sent messages in last 24h)
- Returns total_messages (non-deleted messages count)
- Returns rooms_active (rooms with messages in last 24h)
- Added GetStats handler and GET /chat/stats route
- Updated ChatService to use NewChatServiceWithDB for database access
Phase: PHASE-2
Priority: P1
Progress: 15/267 (5.6%)
