Fix issues identified during code review of path editor enhancements:
- Fix unused binding lint warning in distribute-content that blocked CI
- Fix collision-step floor comparison to use round instead of floor,
correctly detecting collisions when coordinates drift slightly below
integer boundaries
- Fix resolve-edit-fills to recurse through empty parent groups when
searching for inherited fills in nested group hierarchies
- Fix expand-coincident-node-indices to use fuzzy comparison (gpt/close?)
instead of exact equality, handling floating-point divergence after
transforms or rotations
- Remove unreachable dead code in path-point* on-pointer-down handler
- Add tests for collision-step boundary cases, nested group fill
inheritance, and coincident node alignment/flipping
AI-assisted-by: mimo-v2.5-pro
9cc83c5c2b