Keep net-label connections out of physical routing

[justtryingtohelp46]

/claim #79

Summary

• clone the direct connectivity map before adding netConnections, so global label connectivity cannot mutate the direct routing map
• queue MSP and long-distance routing candidates from direct physical connections only, while preserving the global connectivity map for label placement
• add regression coverage for pure net-label-only nets and mixed direct+net-label nets in both routing stages
• refresh visual snapshots so netConnections are represented as labels instead of routed traces

Tests

• bun test tests/solvers/MspConnectionPairSolver/MspConnectionPairSolver_netConnections.test.ts tests/solvers/LongDistancePairSolver/LongDistancePairSolver_netConnections.test.ts
• bun test
• bun run format:check
• bun run build
• git diff --check

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Project	Deployment	Actions	Updated (UTC)
schematic-trace-solver	Ready	Preview, Comment	May 20, 2026 10:16pm