Use active breakout bounds for copper pours

[ShiboSoftwareDev]

Summary

• let SRJ construction select the active routing PCB group explicitly
• replace only copper-pour obstacles at the shared custom-breakout phase boundary
• preserve the phase's existing non-pour obstacles, connections, and already-routed traces
• make the regression fixture expect the right breakout's pours at x = 10 instead of the left breakout's x = -10

Why this fix is needed

Outline-less unbroken pours are converted into rectangular routing obstacles. On a board with multiple custom breakouts, those rectangles must use the group being routed now; otherwise an autorouter can treat a sibling breakout as occupied copper while treating its own actual plane area as empty. That can make a route avoid a nonexistent obstacle or enter copper belonging to another net.

The phase-local correction belongs at Core's phased-routing handoff because the base SRJ deliberately remains board-wide and the active routingPcbGroupId is known only while a phase is being prepared. The substitution runs for every initial custom-breakout phase, not only connection-reroute phases. It regenerates the active group's pours and replaces just obstacles marked isCopperPour; all fixed component obstacles, phase connections, and prior routed traces remain exactly as selected by the existing phase filter.

This is a stacked, tested alternative to #3389. The competing PR's current placement inside isConnectionReroutePhase leaves ordinary custom breakout phases unfixed; the exact repro in the base PR exercises that missing path.

Test plan

• bun test tests/breakout/active-breakout-copper-pour-bounds.test.tsx

• bun test tests/utils/autorouting/simple-route-json-unbroken-copper-pour-obstacles.test.tsx tests/repros/repro-offset-board-copper-pour-bounds.test.tsx tests/subcircuits/subcircuit-exposed-nets-copper-pour01.test.tsx tests/subcircuits/subcircuit-exposed-nets-copper-pour02.test.tsx tests/breakout/custom-implicit-breakout-point-solver.test.tsx tests/breakout/active-breakout-copper-pour-bounds.test.tsx

• bunx biome check lib/components/primitive-components/Group/Group.ts lib/utils/autorouting/getSimpleRouteJsonFromCircuitJson.ts tests/breakout/active-breakout-copper-pour-bounds.test.tsx

• bunx tsc --noEmit (GitHub Actions)

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Project	Deployment	Actions	Updated (UTC)
tscircuit-core-benchmarks	Ready	Preview	Aug 24, 2026 4:38am