refactor: Remove PantryProduct class and simplify category resolution in PantryScreen

flutter/lib/features/pantry/presentation/pantry_screen.dart

@@ -11,7 +11,6 @@ import '../../auth/data/auth_providers.dart';
 import '../../inventory/data/inventory_providers.dart';
 import '../data/pantry_providers.dart';
 import '../domain/pantry_item.dart';
-import '../domain/pantry_product.dart';
 
 final _logger = Logger('PantryScreen');
 
@@ -214,35 +213,26 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
     }
   }
 
-  String _resolveL1Category(PantryItem item, Map<int, PantryProduct> productById) {
-    final path = productById[item.productId]?.categoryPath?.trim();
-    if (path != null && path.isNotEmpty) {
-      return path.split('>').first.trim();
-    }
-    if (item.category != null && item.category!.trim().isNotEmpty) {
-      return item.category!.trim();
-    }
-    return context.l10n.pantryOtherCategory;
+  String _resolveL1Category(PantryItem item) {
+    return item.l1CategoryOrNull ?? context.l10n.pantryOtherCategory;
   }
 
   @override
   Widget build(BuildContext context) {
     final pantryAsync = ref.watch(pantryProvider);
-    final productsAsync = ref.watch(pantryProductsProvider);
 
-    if (pantryAsync.isLoading || productsAsync.isLoading) {
+    if (pantryAsync.isLoading) {
       return LoadingStateView(label: context.l10n.pantryLoading);
     }
 
-    if (pantryAsync.hasError || productsAsync.hasError) {
-      final error = pantryAsync.error ?? productsAsync.error;
+    if (pantryAsync.hasError) {
+      final error = pantryAsync.error;
       _logger.severe('Error loading pantry or products: $error');
       return buildCopyableErrorPanel(
         context: context,
         message: mapErrorToUserMessage(error ?? 'Okänt fel', context),
         onRetry: () {
           ref.invalidate(pantryProvider);
-          ref.invalidate(pantryProductsProvider);
         },
         title: 'Kunde inte läsa baslagret',
       );
@@ -250,15 +240,17 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
 
     final pantryItems =
         pantryAsync.maybeWhen(data: (d) => d, orElse: () => null) ?? const [];
-    final products =
-        productsAsync.maybeWhen(data: (d) => d, orElse: () => null) ?? const [];
-    final productById = {for (final product in products) product.id: product};
 
     final filteredItems = pantryItems.where((item) {
       if (_locationFilter.isEmpty) return true;
       return (item.location ?? '').trim() == _locationFilter;
     }).toList();
 
+    final l1LowerByItemId = {
+      for (final item in filteredItems)
+        item.id: _resolveL1Category(item).toLowerCase(),
+    };
+
     filteredItems.sort((a, b) {
       if (_sort == 'nameDesc') {
         return b.displayName.toLowerCase().compareTo(a.displayName.toLowerCase());
@@ -271,9 +263,7 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
         return a.displayName.toLowerCase().compareTo(b.displayName.toLowerCase());
       }
       if (_sort == 'l1CategoryAsc') {
-        final byL1 = _resolveL1Category(a, productById).toLowerCase().compareTo(
-          _resolveL1Category(b, productById).toLowerCase(),
-        );
+        final byL1 = (l1LowerByItemId[a.id] ?? '').compareTo(l1LowerByItemId[b.id] ?? '');
         if (byL1 != 0) return byL1;
         return a.displayName.toLowerCase().compareTo(b.displayName.toLowerCase());
       }
@@ -379,7 +369,7 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
               if (index == 0) return filterSection;
               if (index == 1) return headerSection;
               final item = filteredItems[index - 2];
-              final l1Category = _resolveL1Category(item, productById);
+              final l1Category = _resolveL1Category(item);
 
               return ListTile(
                 title: Text(item.displayName),