Apply the relative orientation matrix directly. Large rotations also
change flip flags, so applying flips before rotation can add 180 degrees.
The text regression fails before this fix at 135 and 225 degrees.
Validation: geometry suite, 4 tests / 50 assertions; existing golden
cases and worlds, 1098 assertions. No existing golden digest changed.
Benchmark lower-quantile ratios against Phase 1e:
main 10/100/1000 copies 0.51/0.59/0.58; three levels 0.53;
chain 0.61; library 0.53; many shapes 0.54; variant switch 0.70.
No regression flag.
AI-assisted-by: GPT-6
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