feat: Add location display and category chips in pantry and inventory screens

flutter/lib/features/inventory/presentation/inventory_edit_screen.dart

@@ -218,6 +218,13 @@ class _InventoryEditScreenState extends ConsumerState<InventoryEditScreen> {
   }
 
   Future<void> _save() async {
+    if (_selectedProductId == null) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text(context.l10n.inventorySelectProduct)),
+      );
+      return;
+    }
+
     if (!_formKey.currentState!.validate()) return;
     setState(() => _saving = true);
     try {

flutter/lib/features/inventory/presentation/swipeable_inventory_tile.dart

@@ -286,10 +286,12 @@ class _ForegroundTile extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final theme = Theme.of(context);
+    final location = item.location?.trim();
+    final hasLocation = location != null && location.isNotEmpty;
 
     final subtitleText = [
       '${_fmtQty(item.quantity)} ${item.unit}',
-      if (item.location != null && item.location!.isNotEmpty) item.location!,
+      if (hasLocation) location,
       if (item.bestBeforeDate != null)
         'Bäst före: ${_formatDate(item.bestBeforeDate!)}',
     ].join(' · ');
@@ -305,8 +307,12 @@ class _ForegroundTile extends ConsumerWidget {
               )
             : null,
         title: Text(item.displayName),
-        // Subtitle: small swipe-hint icon + text on the same row.
+        // Subtitle: swipe hint + details on first line, category chip below.
-        subtitle: Row(
+        subtitle: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Row(
               children: [
                 if (!selectableMode) ...[
                   Icon(
@@ -324,6 +330,30 @@ class _ForegroundTile extends ConsumerWidget {
                 ),
               ],
             ),
+            const SizedBox(height: 6),
+            Row(
+              children: [
+                Flexible(
+                  child: Chip(
+                    label: Text(
+                      'L1: ${item.l1Category}',
+                      maxLines: 1,
+                      overflow: TextOverflow.ellipsis,
+                    ),
+                    padding: EdgeInsets.zero,
+                    visualDensity: VisualDensity.compact,
+                    materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                    side: BorderSide(color: theme.colorScheme.outlineVariant),
+                    backgroundColor: theme.colorScheme.surface,
+                    labelStyle: theme.textTheme.bodySmall?.copyWith(
+                      color: theme.colorScheme.onSurfaceVariant,
+                    ),
+                  ),
+                ),
+              ],
+            ),
+          ],
+        ),
         trailing: acting
             ? const SizedBox(
                 width: 24,

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

@@ -219,6 +219,9 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
 
   @override
   Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final colorScheme = theme.colorScheme;
+    final textTheme = theme.textTheme;
     final pantryAsync = ref.watch(pantryProvider);
 
     if (pantryAsync.isLoading) {
@@ -370,15 +373,43 @@ class _PantryScreenState extends ConsumerState<PantryScreen> {
               if (index == 1) return headerSection;
               final item = filteredItems[index - 2];
               final l1Category = _resolveL1Category(item);
+              final location = item.location?.trim();
+              final hasLocation = location != null && location.isNotEmpty;
 
               return ListTile(
                 title: Text(item.displayName),
-                subtitle: Text(
+                subtitle: Column(
-                  [
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    if (hasLocation)
+                      Text(
+                        'Plats: $location',
+                        overflow: TextOverflow.ellipsis,
+                      ),
+                    const SizedBox(height: 6),
+                    Row(
+                      children: [
+                        Flexible(
+                          child: Chip(
+                            label: Text(
                               'L1: $l1Category',
-                    if (item.location != null && item.location!.trim().isNotEmpty)
+                              maxLines: 1,
-                      'Plats: ${item.location}',
+                              overflow: TextOverflow.ellipsis,
-                  ].join(' • '),
+                            ),
+                            padding: EdgeInsets.zero,
+                            visualDensity: VisualDensity.compact,
+                            materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
+                            side: BorderSide(color: colorScheme.outlineVariant),
+                            backgroundColor: colorScheme.surface,
+                            labelStyle: textTheme.bodySmall?.copyWith(
+                              color: colorScheme.onSurfaceVariant,
+                            ),
+                          ),
+                        ),
+                      ],
+                    ),
+                  ],
                 ),
                 trailing: Row(
                   mainAxisSize: MainAxisSize.min,