Hi,
i am a desktop and web developer.
i read your requirment. If you want to run cross-platform:Mac, Win, Linux, you can use Electron. Electron is a great framework using web technology to run cross-platform. I wrap html/css/javascript, so it is using create the nice gui for cross-platform.
Let me know if you want to implement this project on Electron.
Please contact me so we can discuss more detail.
Thanks & regards,