The previous fix wrapped the span correctly but normalized the
returned west/east back into [-180, 180), which re-inverts the box
whenever it crosses the antimeridian (west > east again). Downstream
consumers (getBoundsCenter, boundsOverlap) assume west <= east and
silently misbehave on an inverted box: the fetch center lands on the
opposite side of the planet, and the overlap gate never skips a
re-fetch.
Drop the normalization and leave west/east unnormalized instead, so
the box stays monotonic. The only remaining edge case (coordinates
outside the conventional range reaching the Overpass query builder)
is a visible, separate problem rather than a silently wrong center.
Addresses review feedback on #392.
east - west assumed a linear longitude axis, so a viewport crossing
the antimeridian (west=179.98, east=-179.98) produced a negative span
and unnormalized output coordinates outside [-180, 180). Wrap the span
through 360 and normalize the clamped west/east back into range.
Fixes#352.
Ashfaq