• Fix: Animated maintainScrollAtEnd follows rapid and first-load content growth, including short alignItemsAtEnd lists, and stops when the user scrolls away.
• Fix: Item size changes no longer interrupt momentum scrolling when maintainVisibleContentPosition adjusts the scroll position.
• Fix: A numeric initialScrollIndex targeting the last item stays at the end when the viewport is measured or resized, while object targets and explicit offsets keep their requested alignment.