Fix Circuit JSON inflation fidelity for boards and subcircuits

[ShiboSoftwareDev]

Summary

• inflate source nets, test points, pin headers, schematic sheets, and schematic proxy components
• preserve imported board geometry/appearance, copper pours, footprint rotations, silkscreen properties, named traces, and PCB route endpoint references
• keep imported routed boards stable by avoiding a second DRC/autorouting pass while validating newly generated routes normally
• support schematic-only and do-not-place chips without producing false footprint errors
• keep routing/manufacturing limits controlled by explicit destination board props so importing geometry does not silently tighten an autorouter phase

Verification

• all 26 subcircuit Circuit JSON tests pass
• targeted panel/cache/imported-reroute snapshot regressions pass
• USB-C named-net and AM62L dense-routing regressions pass locally
• Arduino Uno reroute, layer persistence, and PCB trace inflation regressions pass
• TypeScript, Biome, package build, smoke test, and CI shards 1-9 pass
• verified against four TI EVM subtraction snapshots in the downstream package

CI baseline note

CI shard 10 reports the same USB-C and AM62L router assertions on the current main branch (main run); the PR introduces no additional shard-10 failure.

Downstream

• Fix EVM rendering and component ownership boosters#21 fixes the EVM source fixtures exposed by this validation
• Fix subtraction topology and shared inflation pipeline ShiboSoftwareDev/subtract-component-from-circuit-json#1 consumes this inflation behavior

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Project	Deployment	Actions	Updated
tscircuit-core-benchmarks	Ready	Preview	Sep 26, 2026 11:53pm UTC