Add same-net segment alignment cleanup phase

[Chaos-among-us]

/claim #29

Summary

• Adds a final TraceCleanupSolver phase that groups traces by net and aligns close overlapping internal horizontal/vertical same-net segments onto a shared axis.
• Preserves endpoint/pin-adjacent segments and rejects changes that collide with chips, labels, or different-net traces.
• Adds focused coverage for horizontal alignment, vertical alignment, different-net protection, and endpoint preservation.

Verification

• npx --yes bun test
• tsc --noEmit
• biome check lib/solvers/TraceCleanupSolver/alignNearbySameNetSegments.ts lib/solvers/TraceCleanupSolver/TraceCleanupSolver.ts tests/solvers/TraceCleanupSolver/align-nearby-same-net-segments.test.ts

AI-assisted with Codex; patch and verification were reviewed locally.

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 14, 2026 5:25pm