alonso.torres f96e9a1539 🐛 Normalize newly allocated grid cells in the same assignment pass
Assign positions after adding overflow cells so a second assignment leaves
the grid unchanged. This keeps main and copy cell metadata in agreement.
Fix F129. The red regression now passes; layout suite: 60 tests, 344 asserts.

Benchmark ratios against Phase 1e: main 10/100/1000 0.46/0.52/0.53;
three levels 0.47; chain 0.51; library 0.51; many shapes 0.49;
variant switch 0.61. No regression flag.

AI-assisted-by: GPT-6
2026-10-30 09:50:08 +01:00
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