Fixes three review findings:
1. Sticky creation no longer zoom-adapts — always creates at M preset
(28px/260w) in world space. Consistent at any zoom level.
2. Preset definitions extracted to stickyPresets.ts (shared domain module).
TextFormatToolbar and tools.ts both import from there — no more
canvas→component dependency inversion.
3. TextEditor.onLiveResize callback syncs spatial index and transform
box as sticky background grows during typing.
Hiren Kangad
2d05226ddd