Show HN: An elegant AI chat client

Differences from other AI Chat clients:

- Supports more platforms, including Windows, Linux, Mac, Android and Web (PWA)

- Supports creating multiple workspaces to isolate conversations and work on different themes

- Modifications and regenerations will be presented as branches, just like chatgpt.com

- Local-first data storage + real-time cloud synchronization after login

- Supports more MCP features, including Tools, Resources, Prompts, and supports both STDIO (desktop only) and SSE connections

- Supports using prompt templates and variables to build dynamic and reusable prompts

- Some detailed functions: user input preview, message content catalog, quote message content, custom keyboard shortcuts, etc.

- Supports document parsing, bug no RAG yet