search_tab.dart

class _SearchTabState extends State<SearchTab> {
// ...

  @override
  Widget build(BuildContext context) {
    final model = Provider.of<AppStateModel>(context);   
    final results = model.search(_terms);                

    return DecoratedBox(
      decoration: const BoxDecoration(
        color: Styles.scaffoldBackground,
      ),
      child: SafeArea(
        child: Column(
          children: [
            _buildSearchBox(),
            Expanded(
              child: ListView.builder(
                itemBuilder: (context, index) => ProductRowItem(
                      index: index,
                      product: results[index],
                      lastItem: index == results.length - 1,
                    ),
                itemCount: results.length,
              ),
            ),
          ],
        ),
      ),
    );
  }
}