endDrag
Completes the active drag gesture.
Sets dragJustEnded to true and clears draggedCardIdentifier.
Return
DragEndResult containing the card identifier and its final index, or null if no drag was active.
Completes the active drag gesture.
Sets dragJustEnded to true and clears draggedCardIdentifier.
DragEndResult containing the card identifier and its final index, or null if no drag was active.