Answer
Tables have a separate CSV download action. TXT and Markdown preserve international text using UTF-8. CSV exports preserve numbers and protect formula-looking text. Downloads and native shares retain known media filenames.
File badges show an extension as well as a colour, so colour is not the only way to identify a file. Small image previews may gain padding so controls fit, but the original image and downloaded file are unchanged.
When message actions would fall below the visible chat, the timeline can move just enough to reveal them. Scrolling yourself cancels that adjustment; reduced motion makes it immediate.