Engine:
- layoutSizingVertical/Horizontal setters now use child's own layout
direction (not parent's) to map primary/counter axis — matches Yoga
- FILL on cross-axis uses alignSelf:Stretch instead of flexGrow
(flexGrow only works on main axis, caused even distribution bug)
- FILL on main axis auto-sets layoutGrow=1 for leaf nodes
This fixes the 20-step debugging spiral where AI set FIXED heights
on HORIZONTAL children inside VERTICAL parent but Yoga ignored them
(wrote primaryAxisSizing via parent axis, Yoga read counterAxisSizing
via child axis — never saw the FIXED value).
Describe noise reduction:
- Suppress 'absolutely positioned inside flex' — intentional for
decorative overlays (selection handles, badges)
- Suppress 'justify=between with HUG' when node fills parent width
- Suppress 'fixed size + grow' when sizing is FILL (standard pattern)
- 'Inconsistent padding' requires 3+ siblings (not 2)
Prompt:
- Bail-out: delete and re-render after 2 failed set_* attempts
- eval restricted to operations, not layout debugging
- Replace _id/_graph/_api with Symbol-keyed properties so eval scripts
can't access SceneGraph internals directly
- fills/strokes/effects return frozen structuredClone copies
- Fix currentPage getter to define selection only once per proxy
- Fix layoutSizingHorizontal/Vertical: respect parent layout direction
even when the node itself is an auto-layout frame
- Add 6 new tests: layoutSizing, frozen arrays, internals not exposed
