Bryan's ordering replaces the stale-answer check with something the shape
of the frame makes impossible: nothing shallower is drawn while anything
deeper is dirty, so a parent never reads an answer that is about to move.
The other two are written up rather than landed. A stack takes its sizing
child's fraction twice, which no oracle can see because warm and cold are
wrong alike; the fix is three grid steps short of the tolerance. And
padding is to go outside what it pads with an `Inset` beside it, which one
unaccounted halving is holding up. Both are pushed as `wip/` branches.
iris-ai
be895375ec