POST /Library/VirtualFolders/Name is the odd one out in that controller --
most of /Library/VirtualFolders/* takes an id, and passing one here returns
a bare "HTTP 400: Error processing request." that says nothing about why.
Verified against 10.11.4: name -> 204.
Also records that renaming re-ids the library, because Jellyfin derives the
ItemId from the name. ytstream is unaffected because find_library matches on
path -- confirmed by a full refresh-metadata over 257 NFOs with 0 proxy
requests straight after the rename.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude
28d0e83130