Swap a track's audio by EntryKey (metadata/release/position preserved, waveform regenerated); hide per-track remove on a release's sole persisted track so it can only be replaced or release-deleted.
BatchTrackDetail gains ShowTrackName parameter (default true); BatchUpload removes the
Track Name input on the single-track path; BatchEdit suppresses it there too. Both sync
_tracks[0].TrackName = _albumName on submit/save so names can never diverge. Cut path
unchanged.
daniel-c-harvey