alonso.torres e4e02a4753 🐛 Clear source grid cells when relocating children
Recalculate cell positions in the previous grids after moving children.
The destination update alone left cell references to shapes that moved.

Validation: reset and move suites, 21 tests / 92 assertions. The grid
move regression failed before the fix and checks exact undo.

Benchmark ratios against Phase 1e: main 10/100/1000 copies
0.54/0.56/0.60; three levels 0.52; chain 0.52; library 0.55;
many shapes 0.58; variant switch 0.61. No regression flag.

AI-assisted-by: GPT-6
2026-10-28 15:53:08 +01:00
..
2026-10-28 15:53:06 +01:00
2026-09-29 09:07:34 +02:00
2026-03-11 15:24:40 +01:00