- redo: re-applies the last undone action via core.command.redo()
- toggle_track_mute: toggles mute on video/audio tracks via
ToggleTrackMuteCommand
- toggle_track_visibility: toggles visibility on overlay tracks via
ToggleTrackVisibilityCommand
- update_clip now supports trimStart/trimEnd for slip-trimming clips
without moving them on the timeline