Implement web frontend using Vite + React + TypeScript with:
- Chakra UI component library for theming and styling
- SignalR bridge (lunaBridge) for real-time server communication
- Chat components (ChatPanel, ChatInput, ChatMessage)
- Layout components (AppLayout, Sidebar, StatusBar, SystemPanel)
- Custom useChat hook for conversation state management
- Dark/light theme support via ColorModeProvider
- Mock conversation data for development
