feat: real-time alerts via WebSocket push notifications
- Add ws WebSocket server (port 3001) with JWT auth and user-socket mapping
- Add WebSocket client with exponential backoff reconnection and heartbeat
- Add useRealtimeAlerts hook with toast notifications and unread badge
- Add alert.publisher service (WS → push → email fallback)
- Integrate publisher into DarkWatch, VoicePrint, HomeTitle, SpamShield, RemoveBrokers
- Update Navbar with connection status indicator and unread count
- Add comprehensive tests (14 passing) for server, client, and publisher
Michael Freno
c02457c66a