Handles previously had a 3 px screen-space dead zone before drag started
(the click-vs-drag heuristic). On a precision-positioning tool that
makes nudges feel mushy, and the datum editor — which uses Konva drag
— has no such threshold. Drop the threshold; selection still happens
on pointerDown so a pure click that doesn't move never enters
pointerMove and the position never drifts.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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