Each time you re-write keep a copy of the before and after with some notes on why. Then with a few good examples of this turn it into a skill to review/fix new UI copy.

Believe me I tried that. I tried giving concrete examples, I edit a 50 line changelog and tell it to learn the style and write another changelog for another app similar to it, I built a whole system on a Vale linter detecting these claudisms with hooks to rewrite them in my voice which I've trained from my thousands of hand written UI copy and blog writing.

Nothing works. This style of writing is deeply ingrained into these models.