the TUI library for tcell has mouse support, though you see it more in tview (or one of the dozens of maintained forks)

I've already experimented with dropdown menus and minimizing sections. While I too love the TUI and keyboard driven experience, many want something they can click on, less overhead from every application having their own hotkeys. For me, it's about reaching more people, and the hope that I can bring more of them into the mouseless development experience