435fb0b076
Allow administrators to disable playlist cover art upload/removal for non-admin users via the new EnableCoverArtUpload config option (default: true). - Guard uploadPlaylistImage and deletePlaylistImage endpoints (403 for non-admin when disabled) - Set CoverArtRole in Subsonic GetUser/GetUsers responses based on config and admin status - Pass config to frontend and conditionally hide upload/remove UI controls - Admins always retain upload capability regardless of setting