usePointerDrag — PointerEvents primitive with capture, escape-cancel,
keyboard-cancel, and onBeforeUnmount cleanup. Replaces the legacy
mousedown stack the prototype used.
useDragOrClick — threshold-based drag/click disambiguation (4px Manhattan,
matches prototype audit §4.1). Emits onClick when the pointer never crossed
the threshold; otherwise enters drag mode and emits onDragStart / onDragMove /
onDragEnd. Installs the one-shot capture-phase click suppressor on drag-end
so the synthetic click never opens the popover.
RFC v0.2 D7 — implemented once instead of three times like the prototype.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bert.hausmans
5b812771de