Not exactly Claude Desktop but we have something more "generic" that works across multiple OSes (written in Tauri) - Msty Claw [1]. It also comes with a companion E2E encrypted mobile app.
Thanks, I use DeepSeek and Gemini mostly so I was looking for something that isn't tied to Anthropic. I'm mostly covered by pi.dev but want to try out a GUI to see if they're worth my time. This looks surprisingly feature-complete, too bad it's only "Free for personal use in beta", but I'll definitely give it a spin.