Consistent design for navigating between pages

[Daniel-Mietchen]

We currently have some consistency to navigate between aspect pages, but no consistent navigation between aspects and subaspects (see, e.g., #1244 ), nor to and from other subpages like /cito or /curation (cf. #1126).

This ticket is to collect notes on how to approach that. Today, we exchanged some more ideas about the curation pages specifically, e.g. considering a "Curate" button.

Perhaps we could give it a different colour and position, to keep it apart from the "content" pages? On the other hand, the case could be made for keeping all the buttons together to highlight that contributing to curation is integral to the usage of Scholia.

The main problem I see with having the button on the top is that it might be irritating because when people are at the top of the page, they ain't seen nothin of the actual page content. So perhaps add it to the bottom, or to both paces, or have it slide as the user scrolls down?