Bring back the expandable synopsis in the left side bar, pretty please!#232

OG Butterdocs from 2024 had this so that the summaries we create on the Outline/Board view were able to be expanded or collapsed on the left sidebar. I hate having to open the note to view the summary without going into Outline mode, because I have too much info in there (in my notes) and it’s distracting. I just wanna see the synopsis and keep it moving.

This also helped when looking at the outline and the copy at the same time, side by side, to make sure it all aligned with what I planned. As it is now, I have to close and open each note or flip between Outline View and Write View.