- Conversation sidebar with create/delete/history
- Chat area with streaming LLM responses (z-ai-web-dev-sdk)
- Voice input via Web Speech API with recording indicator
- Browser TTS auto-speak for assistant responses
- Settings panel (voice, TTS, sidebar toggle)
- Prisma schema: Conversation + Message models
- API routes: /api/chat/stream, /api/conversations, /api/messages
- Zustand store for state management
- Web Speech API type declarations
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