Three-layer edge-node clearance improvement:
1. A* proximity cost with correct coordinates: pass original (uninflated)
node bounds to ComputeNodeProximityCost so the pathfinder penalizes
edges near real node boundaries, not the inflated obstacle margin.
Weight=800, clearance=40px. Grid lines added at clearance distance
from real nodes.
2. Default LayerSpacing increased from 60 to 80, adaptive multiplier
floor raised from 0.92 to 1.0, giving wider routing corridors
between node rows.
3. Post-pipeline EnforceMinimumNodeClearance: final unconditional pass
pushes horizontal segments within 8px of node tops (12px push) or
within minClearance of node bottoms (full clearance push).
Also: bridge gap detection now uses curve-aware effective segments
(same preprocessing + corner pull-back as BuildRoundedEdgePath) so
gaps only appear at genuine visual crossings. Collector trunks and
same-group edges excluded from gap detection.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
