UI hotfix: restore aha!/ugh. buttons. The previous top-chrome-hide CSS included '.icon-button-wrapper { display: none }', but Gradio uses that same wrapper class for the repurposed Like/Dislike (aha/ugh) buttons in the message footer, so they disappeared along with the share/clear toolbar buttons. Drop the wrapper rule and rely solely on aria-label / title matchers for share/clear/delete/trash.
