deltachat/deltachat-desktop — reverse-engineered prompt

Build me a private desktop messenger like Delta Chat for Mac, Windows, and Linux. I want the normal desktop app version, not the experimental browser version.

It should let someone sign in with their existing email account and use it like a simple chat app, with a chat list, conversations, message composer, settings, and a clean desktop layout. Messages should go through email behind the scenes, using IMAP and SMTP, but the user shouldn’t have to think about that. Make privacy a main focus, with encryption support and clear account setup or troubleshooting when something goes wrong.

Also include the idea of chat shared tools or small games that can be opened from inside a conversation. Keep the interface friendly and practical, with basic keyboard shortcuts, theme support if possible, and a way to package or run it as a real desktop app. Use the current Delta Chat docs online if you need to.