either ask ChatGPT for another segmentation. But this could also end up crappy.
allow the user to "drag the gaps" between words to left and right to customize the segmentation.
possibly dragging it one character to wide is sufficient, as Chinese words usually have very few characters. The user could still drag it a second time in extreme cases.
dragging would allow to merge two gaps into one (i.e. merge words), but wouldn't allow to create new gaps (i.e. split words). Find a UX solution for this.
Sometimes the segmentation of a sentence into words is not optimal.
Allow the user to improve it.
Ideas: