Great idea! After all why reinvent the wheel with TUI libraries built in a popular browser-based front-end javascript framework?
I remember using talk back when first learning Linux in college. I enjoyed the character-by-character aspect of it.
Yes, I've wondered many times why there are no modern (human to human) chat interfaces that implements that, rather than sentence by sentence.
The same reason tar and dd and practically everything operates on blocks not bytes, plus the same reason the shell doesn't act until eol delimiter, the opportunity to edit before submit.
I think talk could get away with it because on a shared local host both sides are accessing the same local physical resource directly, no tcp packet per byte.
I used talk back in 90ties and loved it and still missing it. Interfacing this with LLM is a nice touch.
Interesting chat widget in the corner.
I've been looking for something similar I saw once, it was a chat widget connecting to everyone looking at the same webpage.
But it was called something like "aarrrgh!!" (the pirate), and I can't remember the name of the damn thing!