amitmerchant1990/pomolectron ? reverse-engineered prompt

Build me a simple desktop Pomodoro timer app that sits in the system tray or menubar and stays out of the way while I work.

I want it to have a clean little popup where I can start a work session, see the countdown, and switch between Pomodoro, short break, and long break. When a timer finishes, it should send a desktop notification so I know it’s time to take a break or get back to work. Please make it work on Windows, macOS, and Linux, and give it a nice polished look with both light and dark mode support.

Keep it focused on the basics, something lightweight and easy to use, with the app living mostly in the tray instead of taking over the whole screen. If you need to look up current docs online while building it, go ahead.