Desktop board scrollers no longer snap: the browser's proximity-snap settle
animation was capturing wheel/trackpad pans and reading as a slow, sticky drag
toward a column center. Base `.board`, `.board-workflow-columns`, and
`.lane-columns` declare `scroll-snap-type: none`; proximity snap is re-declared
in phone-tier media blocks only, where the JS column pager owns paging.
On phones, the hook now owns post-lift motion instead of waiting it out. A
directional lift kills native inertia and animates to its target column via rAF
ease-out (~190-300ms), so the page starts moving on lift rather than after a
native fling that can coast for most of a second. Fling reach is preserved by
deriving a page count (1-3) from release velocity sampled off the board's own
scroll ticks, not from however far inertia happens to travel.
Guards: re-touch cancels the animation and hands the axis back to the finger;
reduced motion, missing rAF, and sub-2px distances fall back to the instant hard
jump; unmount mid-animation restores the frozen inline styles; a fast drag that
rests before lifting is not treated as a flick.
Tap-to-stop-during-momentum is gone as an interaction (no long coast remains to
interrupt). Its regression test is reframed around the equivalent seam: a drag
that interrupts the page animation wins over the pending page.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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