Driver, on Mapbox: the region dashboard zooms and draws correctly, but zoom in,
zoom out and fullscreen cannot be pressed at all.
CAUSE. .map-scroll-edge is a 40px full-height strip down each side with
pointer-events:auto and z-index:2 — the affordance that lets a vertical drag
scroll the PAGE instead of panning the map. Both engines place their control
groups in the very corners those strips cover, and at equal z-index the element
later in the DOM wins. The strips are rendered after the map container, so they
covered every control.
The strips must keep their pointer events, or the scroll affordance dies with
them, so the controls are lifted above the strips instead of the strips being
made inert.
ALL FOUR CORNERS AND BOTH ENGINE PREFIXES, deliberately: the left strip covers
the two left corners exactly as the right covers the right, a control can sit in
any of them, and naming mapboxgl- and maplibregl- together is what makes this
survive a provider swap — which is the whole point of the provider prop.
Proven headless, per the new Playwright policy: the shipped bundle carries the
rule for both prefixes and the strips still carry
touch-action:pan-y;pointer-events:auto. Whether the buttons are now clickable is
a drawn behaviour and goes out as needs-eyes.
NOT LANDED YET — main is held for studio's freshness rebuild.
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