[Enhancement] Display author metadata

It would be helpful to bring names and FSIDs of the current/parent/root authors to the surface in the UI, especially given recent developments in Flipnote archives, to enable users to more easily find the Flipnotes of their favourite artists.

Perhaps this could be implemented by showing the names and copying the relevant FSID on click?

Start by tracing the UI entry point that displays Flipnote metadata and identify where current, parent, and root author data is available. Check how names and FSIDs are represented before deciding how they should appear and behave on click. Done means the three author levels are visible in the UI and the relevant FSID can be copied.

Written by the indexing model from the issue text.