parser logic added

lib/shop_detail_screen.dart

@@ -5,11 +5,14 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 
+import 'models/line_item.dart';
 import 'models/shop.dart';
 import 'product_detail_screen.dart';
 import 'services/product_repository.dart';
 import 'utils/dates.dart';
 import 'utils/money.dart';
+import 'widgets/confirm_dialog.dart';
+import 'widgets/item_edit_sheet.dart';
 
 class ShopDetailScreen extends StatefulWidget {
   const ShopDetailScreen({
@@ -27,6 +30,7 @@ class ShopDetailScreen extends StatefulWidget {
 
 class _ShopDetailScreenState extends State<ShopDetailScreen> {
   late Future<({Shop shop, List<ShopItem> items})> _future;
+  bool _editing = false;
 
   @override
   void initState() {
@@ -43,6 +47,10 @@ class _ShopDetailScreenState extends State<ShopDetailScreen> {
     return (shop: shop, items: items);
   }
 
+  void _reload() {
+    setState(() => _future = _load());
+  }
+
   Future<void> _openReceipt(File file) async {
     await showDialog<void>(
       context: context,
@@ -68,12 +76,66 @@ class _ShopDetailScreenState extends State<ShopDetailScreen> {
     );
   }
 
+  Future<void> _editItem(ShopItem item) async {
+    final result = await showItemEditSheet(
+      context,
+      item: LineItem(
+        id: '${item.id}',
+        name: item.name,
+        price: item.price,
+        quantity: item.quantity,
+        unitPrice: item.unitPrice,
+      ),
+    );
+    if (result == null || !mounted) return;
+    await widget.repository.updateShopItem(
+      id: item.id,
+      name: result.name,
+      price: result.price,
+      quantity: result.quantity,
+      unitPrice: result.unitPrice,
+    );
+    if (mounted) _reload();
+  }
+
+  Future<void> _removeItem(ShopItem item) async {
+    final confirmed = await confirmAction(
+      context,
+      title: 'Remove item?',
+      message:
+          '"${item.name}" will be removed from this trip. The product stays in your catalog.',
+      confirmLabel: 'Remove',
+    );
+    if (!confirmed || !mounted) return;
+    await widget.repository.deleteShopItem(item.id);
+    if (mounted) _reload();
+  }
+
+  Widget? _itemSubtitle(ShopItem item) {
+    final parts = [
+      if (item.quantity != null)
+        '${item.quantity} × ${formatEuro(item.unitPrice ?? 0)}',
+      if (_editing) formatEuro(item.price),
+    ];
+    if (parts.isEmpty) return null;
+    return Text(parts.join(' · '));
+  }
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
 
     return Scaffold(
-      appBar: AppBar(title: const Text('Shopping trip')),
+      appBar: AppBar(
+        title: const Text('Shopping trip'),
+        actions: [
+          IconButton(
+            tooltip: _editing ? 'Done' : 'Edit',
+            onPressed: () => setState(() => _editing = !_editing),
+            icon: Icon(_editing ? Icons.check : Icons.edit_outlined),
+          ),
+        ],
+      ),
       body: FutureBuilder(
         future: _future,
         builder: (context, snapshot) {
@@ -92,10 +154,8 @@ class _ShopDetailScreenState extends State<ShopDetailScreen> {
           final shop = snapshot.data!.shop;
           final items = snapshot.data!.items;
           final receipt = shop.receiptImagePath;
-          final receiptFile =
-              receipt == null ? null : File(receipt);
-          final hasReceipt =
-              receiptFile != null && receiptFile.existsSync();
+          final receiptFile = receipt == null ? null : File(receipt);
+          final hasReceipt = receiptFile != null && receiptFile.existsSync();
 
           return ListView(
             padding: const EdgeInsets.fromLTRB(16, 8, 16, 32),
@@ -125,20 +185,39 @@ class _ShopDetailScreenState extends State<ShopDetailScreen> {
               const SizedBox(height: 24),
               Text('Products', style: theme.textTheme.titleMedium),
               const SizedBox(height: 8),
+              if (items.isEmpty)
+                Text(
+                  'No items on this trip.',
+                  style: theme.textTheme.bodyLarge,
+                ),
               for (final item in items)
                 ListTile(
                   contentPadding: EdgeInsets.zero,
                   title: Text(item.name),
-                  subtitle: item.quantity == null
-                      ? null
+                  subtitle: _itemSubtitle(item),
+                  trailing: _editing
+                      ? Row(
+                          mainAxisSize: MainAxisSize.min,
+                          children: [
+                            IconButton(
+                              tooltip: 'Edit',
+                              visualDensity: VisualDensity.compact,
+                              onPressed: () => _editItem(item),
+                              icon: const Icon(Icons.edit_outlined),
+                            ),
+                            IconButton(
+                              tooltip: 'Remove',
+                              visualDensity: VisualDensity.compact,
+                              onPressed: () => _removeItem(item),
+                              icon: const Icon(Icons.delete_outline),
+                            ),
+                          ],
+                        )
                       : Text(
-                          '${item.quantity} × ${formatEuro(item.unitPrice ?? 0)}',
+                          formatEuro(item.price),
+                          style: theme.textTheme.titleMedium,
                         ),
-                  trailing: Text(
-                    formatEuro(item.price),
-                    style: theme.textTheme.titleMedium,
-                  ),
-                  onTap: () => _openProduct(item.productId),
+                  onTap: _editing ? null : () => _openProduct(item.productId),
                 ),
               const Divider(),
               ListTile(