My version of HedgeDoc is: Unknown, current release as of 2021-06-28
As a user i would like to see a marker on all notes that are freely editable so i can gain a quick overview of all the notes that anyone may see and edit.
I am sharing a lot of notes between different people who are not logged in. As the number of notes is increasing rapidly i am losing overview of the notes that people have access to. I am frequently linking notes so it can easily happen that people gain access to notes that they are not supposed to see.
Having a marker on the Cards in the history view should help getting notes protected again after sharing them with other people.