A plain swap also retains orientation inherited from its old component.
Record that retained orientation as geometry when it differs from the
new component's expected placement. Parent-derived orientation stays
untouched and size-only overrides still clear.
The regression fails before the fix. The swap suite passes 41 tests /
162 assertions; the seeded MVP property also passes 100 scenarios.
Benchmark vs Phase 1e: main 10/100/1000 0.54/0.57/0.66; levels 0.60;
chain 0.62; library 0.67; many shapes 0.83; switch 0.77. No flags.
AI-assisted-by: GPT-6
fbb56e2916