Add same-net trace segment merge solver

[anytimeatvibe]

/claim #29

Summary

• Adds a new SameNetTraceSegmentMergeSolver pipeline phase after long-distance trace generation and before cross-net overlap shifting.
• Aligns nearby horizontal or vertical trace segments that belong to the same net, so close same-net lines share the same Y or X coordinate before later layout cleanup.
• Keeps different nets isolated, so the existing TraceOverlapShiftSolver still owns cross-net overlap avoidance.
• Exports the new solver/helpers from lib/index.ts, adds focused coverage for same-net alignment and non-alignment across different nets, and updates affected example SVG snapshots.

Implementation Notes

• Segments are grouped by userNetId ?? globalConnNetId ?? dcConnNetId.
• Only orthogonal segments with safe perpendicular neighbors are moved, which avoids introducing diagonal path segments.
• Close segments are unioned by orientation, fixed-axis distance, and 1D range overlap/gap, then aligned to a length-weighted coordinate.
• The helper clones traces before modifying coordinates and simplifies duplicate/collinear points afterward.

Validation

npm install --legacy-peer-deps
npm install typescript@5.9.3 --legacy-peer-deps --save-dev --no-package-lock
npm run build
npx tsc --noEmit
npx biome format --write lib/index.ts lib/solvers/SchematicTracePipelineSolver/SchematicTracePipelineSolver.ts lib/solvers/SameNetTraceSegmentMergeSolver/SameNetTraceSegmentMergeSolver.ts tests/solvers/SameNetTraceSegmentMergeSolver/SameNetTraceSegmentMergeSolver.test.ts
git diff --cached --check

Additional local Node verification against the compiled dist/index.js confirmed two same-net horizontal segments align to the same weighted coordinate.

GitHub Actions are passing on the latest commit: Bun Test, Type Check, Format Check, and Vercel.

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 22, 2026 10:10am