QOL: after adding comments remove approve by default

Once comments and other notes are added to a plan, it would be good if the default option or the green "Approve" button becomes the send feedback button

Start by locating the plan review UI that renders the green "Approve" button and handles added comments or notes. Trace how the default action is selected after comments are present; done means the default action sends feedback in that state while approval remains available otherwise, with relevant tests updated or added.

Written by the indexing model from the issue text.