I find it strange how most of these terminal-based AI coding agents have ended up with these attempts at making text UIs flashy. Tons of whitespace, line art, widgets, ascii art and gradients, and now apparently animations. And then what you don't get is the full suite of expected keybindings, tab completion, consistent scrollback, or even flicker-free text rendering. (At least this one seems to not be written with n…
They are easier to make than full-fledged user interfaces, so you get to see more of them.
(Technically, WezTerm's semantic zones should be the way to solve this for good - but that's WezTerm-only, I don't think any other terminal supports those.)
On the other hand, with GUIs this is not an issue at all. And YMMV, but for me copying snippets, bits of responses and commands is a very frequent operation for any coding agent, TUI, GUI or CLI.