• Feat: Add dataKey so apps can tell the list when the current array represents a different dataset, such as switching conversations or feeds without remounting LegendList.
• Feat: experimental_adaptiveRender.onChange now receives a reason (initial, ready, or scroll) so item components can tell why the render mode changed.
• Fix: Large user scroll jumps render the visible rows first and fill the normal draw distance on the next frame, making long jumps less likely to land on a blank range.
• Fix: maintainScrollAtEnd reruns a pending keep-at-end request after the current one settles, so a footer resize and a new message arriving together keep chat-style lists pinned to the end.
• Fix: Replacing data after clearing the list, or changing dataKey for a non-empty replacement, resets layout readiness and uses the latest initial scroll target for the new dataset.