Mike-Solar 71b1243ad8 engine: add sequence structure to the timeline facade ...

- undoable track removal (content restored on undo) and true-move
  track reordering assembled from the edge commands (the engine has
  no move-track API)
- track height/mute/lock getters and setters, documented as
  non-undoable to match the engine's current semantics
- undoable marker add/remove/rename; duplicate timestamps are
  rejected with E_STATE instead of hitting the engine's debug assert

2026-07-20 08:42:03 +08:00

..

oakengine

engine: add sequence structure to the timeline facade

2026-07-20 08:42:03 +08:00