refreshFromPage method
Refreshes a specific page and everything after it.
Implementation
Future<void> refreshFromPage(int page) async {
if (page < 1 || page > _currentPage) return;
_currentPage = page;
_hasMore = true;
_error = null;
// In this simplified version, we just reset to the target page and clear items.
// A more advanced version would only clear items from that page onwards.
items.clear();
return loadMore();
}