Add close same-net trace cleanup phase

[Haenlein1]

/claim #29
/claim #34

Hi, I completed the requested task.

Summary:

• Added a final TraceCleanupSolver phase that combines close same-net trace segments.
• The new cleanup helper aligns close overlapping horizontal/vertical internal segments only when they share the same globalConnNetId.
• Endpoint segments stay fixed, different-net traces are ignored, and candidate moves are rejected if they introduce a new different-net intersection.
• This covers Merge same-net trace lines that are close together (make at the same Y or same X) #34's same-net same-Y/same-X requirement without opening a duplicate PR for the same implementation.
• Important files changed:
  • lib/solvers/TraceCleanupSolver/combineCloseSameNetSegments.ts
  • lib/solvers/TraceCleanupSolver/TraceCleanupSolver.ts
  • tests/solvers/TraceCleanupSolver/combine-close-same-net-segments.test.ts

#34 verification notes:

• Focused reproduction before behavior: trace a has an internal same-net horizontal run at y = 1, while trace b has an overlapping internal run at y = 1.1.
• After the cleanup phase, trace b snaps its internal run to y = 1 while its endpoint legs remain attached.
• The same focused test also verifies different-net traces are not aligned and unsafe different-net intersections are rejected.

Verification:

• npx --yes bun test tests\solvers\TraceCleanupSolver\combine-close-same-net-segments.test.ts tests\examples\example29.test.ts tests\examples\example34.test.ts tests\solvers\TraceCleanupSolver\TraceCleanupSolver.test.ts
• .\node_modules.bin\tsc.exe --noEmit
• npx --yes bun run build
• npx biome lint lib\solvers\TraceCleanupSolver\combineCloseSameNetSegments.ts tests\solvers\TraceCleanupSolver\combine-close-same-net-segments.test.ts lib\solvers\TraceCleanupSolver\TraceCleanupSolver.ts
• npx biome format lib\solvers\TraceCleanupSolver\TraceCleanupSolver.ts lib\solvers\TraceCleanupSolver\combineCloseSameNetSegments.ts tests\solvers\TraceCleanupSolver\combine-close-same-net-segments.test.ts
• git diff --check

Notes:

• Full npx --yes bun test was also run: 63 passed, 4 skipped, and one unrelated render-comparison test timed out at 5s. Rerunning that failed test alone passed.
• Full npx biome format . reports existing repo-wide CRLF/LF normalization differences, so I verified formatting on the touched files instead.

Bounty/issues:

• New Phase To combine same-net trace segments that are close together #29
• Merge same-net trace lines that are close together (make at the same Y or same X) #34

Please review, and if everything looks good, approve/release the milestone/order.

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 21, 2026 6:24am