Tutorial Undo Boundary Motion Study

Use [tutorial steps], [app version] and [verified undo behavior]. Create a 12-second tutorial animation that pauses before the documented undo boundary and displays an editable checkpoint card. Do not show a recovery sequence unless verified input demonstrates it.

Confirm required reference images and timing inputs are present before generating. Keep objects, identities, spatial relationships and light direction consistent. Render the clip when video generation is supported; otherwise supply a timed shot list, reference checklist and generation-ready prompt, labeled as a production plan. Do not claim rendered output without an actual file. Check the opening, transition and final frame against the stated counts and geometry.