Add same-net trace segment combine phase

[brain-nrds]

/claim #29

Summary

• Adds a TraceCleanup pipeline phase that combines close, overlapping same-net segments before turn minimization.
• Snaps only movable segments onto a same-net target segment, preserving trace endpoints so pin anchors are not moved.
• Covers cross-trace merging, same-trace loop cleanup, different-net skips, and endpoint-anchored segment skips.
• Updates the two visual snapshots that intentionally change because duplicate/nearby same-net segments are now combined.
• Adds typescript as a dev dependency so the existing tsup build can resolve its peer dependency with npm.

Testing

• npm run format:check
• npm run build
• npx tsup lib/solvers/TraceCleanupSolver/combineSameNetTraceSegments.ts --format esm --out-dir /private/tmp/trace-combine-test --no-dts
• node --input-type=module -e "<helper assertions>"
• GitHub CI: Bun Test, Format Check, Type Check, Vercel

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 22, 2026 11:09pm