Add comprehensive web-based admin interface

Creates a production-ready admin interface with FastAPI backend and React frontend:

Backend Features:
- FastAPI server with JWT authentication and WebSocket support
- Comprehensive API endpoints for dashboard, characters, conversations, analytics
- Real-time metrics and activity monitoring with WebSocket broadcasting
- System control endpoints for pause/resume and configuration management
- Advanced analytics including topic trends, relationship networks, community health
- Export capabilities for conversations and character data

Frontend Features:
- Modern React/TypeScript SPA with Tailwind CSS styling
- Real-time dashboard with live activity feeds and system metrics
- Character management interface with profiles and relationship visualization
- Conversation browser with search, filtering, and export capabilities
- Analytics dashboard with charts and community insights
- System status monitoring and control interface
- Responsive design with mobile support

Key Components:
- Authentication system with session management
- WebSocket integration for real-time updates
- Chart visualizations using Recharts
- Component library with consistent design system
- API client with automatic token management
- Toast notifications for user feedback

Admin Interface Access:
- Backend: http://localhost:8000 (FastAPI with auto-docs)
- Frontend: http://localhost:3000/admin (React SPA)
- Default credentials: admin/admin123
- Startup script: python scripts/start_admin.py

This provides complete observability and management capabilities for the autonomous character ecosystem.

requirements.txt

@@ -26,4 +26,13 @@ watchdog==3.0.0
 
 # Enhanced NLP
 spacy==3.7.2
-nltk==3.8.1
+nltk==3.8.1
+
+# Admin Interface
+fastapi==0.104.1
+uvicorn==0.24.0
+python-multipart==0.0.6
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+websockets==12.0
+psutil==5.9.6