Two mobile board gesture fixes: (1) finger travel only counts as horizontal
pan intent when it dominates the vertical axis, so scrolling a column's card
list with incidental diagonal drift no longer swipes to another column; (2)
the commit-one-column paging clamp applies only to gestures begun at rest
centered on a column — a tap-to-stop mid-momentum followed by a drag settles
on the nearest column at the drag's landing point instead of being forced a
column past it by the interrupted scroll's origin.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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