The resting .float rule now caps width at 100vw and height at the
viewport below the caption floor, so a stale viewport reading cannot
leave an oversized panel's header controls or resize corner off screen.
Vertical limits use 100dvh, which follows window.innerHeight as the
gesture hook does. The Web e2e publishes a far-off, oversized resting
rectangle and checks that the stylesheet alone draws it over the viewport.
yudshj
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