new plus button

lib/shop_detail_screen.dart

@@ -13,6 +13,8 @@ import 'utils/dates.dart';
 import 'utils/money.dart';
 import 'widgets/confirm_dialog.dart';
 import 'widgets/item_edit_sheet.dart';
+import 'widgets/name_dialog.dart';
+import 'widgets/tag_editor.dart';
 
 class ShopDetailScreen extends StatefulWidget {
   const ShopDetailScreen({
@@ -31,11 +33,18 @@ class ShopDetailScreen extends StatefulWidget {
 class _ShopDetailScreenState extends State<ShopDetailScreen> {
   late Future<({Shop shop, List<ShopItem> items})> _future;
   bool _editing = false;
+  List<String> _tagSuggestions = [];
 
   @override
   void initState() {
     super.initState();
     _future = _load();
+    widget.repository
+        .getUsedShopTags()
+        .then((tags) {
+          if (mounted) setState(() => _tagSuggestions = tags);
+        })
+        .catchError((_) {});
   }
 
   Future<({Shop shop, List<ShopItem> items})> _load() async {
@@ -111,6 +120,28 @@ class _ShopDetailScreenState extends State<ShopDetailScreen> {
     if (mounted) _reload();
   }
 
+  Future<void> _editName(Shop shop) async {
+    final name = await showNameDialog(
+      context,
+      title: 'Trip name',
+      label: 'Name',
+      initial: shop.name,
+      allowEmpty: true,
+    );
+    if (name == null || !mounted) return;
+    await widget.repository.updateShop(
+      id: shop.id,
+      name: name,
+      clearName: name.isEmpty,
+    );
+    if (mounted) _reload();
+  }
+
+  Future<void> _setTags(Shop shop, List<String> tags) async {
+    await widget.repository.updateShop(id: shop.id, tags: tags);
+    if (mounted) _reload();
+  }
+
   Widget? _itemSubtitle(ShopItem item) {
     final parts = [
       if (item.quantity != null)
@@ -160,12 +191,40 @@ class _ShopDetailScreenState extends State<ShopDetailScreen> {
           return ListView(
             padding: const EdgeInsets.fromLTRB(16, 8, 16, 32),
             children: [
-              Text(shop.supermarket, style: theme.textTheme.headlineMedium),
+              if (_editing)
+                ListTile(
+                  contentPadding: EdgeInsets.zero,
+                  title: Text(
+                    shop.name?.isNotEmpty == true
+                        ? shop.name!
+                        : 'Add a trip name',
+                  ),
+                  subtitle: const Text('Optional name for this shop log'),
+                  trailing: const Icon(Icons.edit_outlined),
+                  onTap: () => _editName(shop),
+                )
+              else
+                Text(shop.displayName, style: theme.textTheme.headlineMedium),
+              if (_editing || (shop.name != null && shop.name!.isNotEmpty)) ...[
+                const SizedBox(height: 4),
+                Text(shop.supermarket, style: theme.textTheme.titleMedium),
+              ],
               const SizedBox(height: 4),
               Text(
                 formatDate(shop.shoppedAt),
                 style: theme.textTheme.bodyLarge,
               ),
+              if (_editing) ...[
+                const SizedBox(height: 16),
+                TagEditor(
+                  tags: shop.tags,
+                  suggestions: _tagSuggestions,
+                  onChanged: (tags) => _setTags(shop, tags),
+                ),
+              ] else if (shop.tags.isNotEmpty) ...[
+                const SizedBox(height: 12),
+                TagChips(tags: shop.tags),
+              ],
               if (hasReceipt) ...[
                 const SizedBox(height: 16),
                 GestureDetector(