chatgptcodexfree/Chatgpt-5.6-AI-Free-Desktop ? reverse-engineered prompt

Build me a native desktop app for Windows, macOS, and Linux that lets me chat with OpenAI GPT 5.6 from one simple window, without needing a browser.

I want the app to support four modes, Sol for creative writing, Luna for careful analysis and coding, Terra for short practical answers, and Cyber for security focused review. It should let me switch modes quickly, use voice chat with speech to text and spoken replies, generate images from prompts, and run code in a built in Python sandbox for things like charts and data work. Also add conversation branching so I can fork a chat from any message, plus export chats to Markdown, JSON, and HTML.

Make it feel polished and easy to use, with a settings page for entering my API key, a clean chat layout, and support for a few useful tools like browsing, calculator, weather, and file handling if possible. If you need to check current docs online, go ahead.