- Right-clicking the stage opens a small menu with Document settings
(pops the document drawer) and Resize stage. Closes on outside
click and ESC.
- Resize stage drops eight accent-coloured drag handles around the
canvas rect (N/NE/E/SE/S/SW/W/NW). East/south handles just grow or
shrink the canvas; west/north (and their corners) also shift every
scene-world coordinate in lock-step so content stays pinned to its
visible position while the canvas re-aligns around it.
- Enter forces stage-crop on so the user can see where the new edge
lands; exit restores the previous crop setting. Exit paths: Done
button in the floating banner, ESC, or the restored crop toggle.
- New store action shiftSceneWorldCoords(dx, dy) covers layer base +
main/position keyframes + bezier control points + clipInstance x/y
across every scene page. Clip-library layers, button assets, hit
shapes and polygon vertex clouds stay put — those live in local
coord systems, not scene-world space.
- Tests: store coverage (shift across pages, positionKeyframes,
ctrlX/Y, clipInstance, clip-library untouched, (0,0) no-op) plus UI
coverage (context-menu items, Resize stage enters mode + renders 8
handles, ESC and Done both exit, crop forced on and restored).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>