Add AI chatbot: FastAPI backend + React chat widget
- Python FastAPI backend (chatbot-api/) with Claude Sonnet 4.6, prompt injection
protection, rate limiting (30 msg/session), off-topic filtering, Redis session storage
- Rocket.Chat integration for live monitoring and human takeover
- Lead capture via n8n webhook
- React chat widget: floating bubble, auto-greeting after 30s, glassmorphism chat
window, mobile responsive, lazy loaded, Mixpanel analytics
- Nginx proxy /api/chat → chatbot-api:8000
- Docker: chatbot-api + Redis services added to docker-compose
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>