fix: merge overlapping collinear segments in schematic traces #34

[GDN84]

Description

This PR addresses issue #34 by implementing a segment-merging phase in the main solve function.

Changes

• lib/index.ts: Added mergeCollinearSegments helper function to identify and combine overlapping or touching segments on the same X or Y axis.
• lib/index.ts: Updated the solve function to map input edges, process them through the merger, and return the cleaned-up results.
• tests/issue34.test.ts: Created a new test file with overlapping segments to verify the fix.

Testing Results

• The new test case confirms that 3 overlapping segments (which previously resulted in 3 separate edges) are now correctly merged into 1 single edge.
• Pass Status: 1 pass, 0 fail.

Closes #34

[vercel]

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Error		Feb 4, 2026 4:56pm