This has been my favorite coding harness of all time. The mouse works for a lot of things. Theres keybindings that confuse me, but I otherwise enjoyed it. I might wind up forking / contributing in the hopes of helping to make it somewhat better. I had built my own also using Rust but I liked their implementation much better. This might explain part of how they pulled it off.
Because GUI is resource intensive and they can run on headless computer/os like linux without Desktop environment , so Tui is perfect for mimicking GUI in terminal only computers