Atom Map:Progressive file — every box drawn

Build 210 on claude/trim-compare-quality-tooltips-kq06tb
Reviewing disabled
The baseline is taller than the new snapshot (948x479 to 948x385).
Baseline History
Build 210501f158
Current build. There are unaccepted changes, so build 119 is still the baseline.
Build 119027f772 current baseline
Accepted by Cody Baker.
Build 56c4da082
Accepted by Cody Baker.
Build 43acc4a0c
Accepted by Cody Baker.
Commenting is disabled because there's a newer build on this branch