feat: make server owner of tabs

lib/views/bar/selected_tab_details.dart

@@ -3,19 +3,16 @@ import 'package:flutter/material.dart';
 import '../../l10n/app_localizations.dart';
 import '../../models/bar_tab.dart';
 import '../../models/tab_item.dart';
-import '../../services/product_service.dart';
 import '../../utils/money.dart';
 
 class SelectedTabDetails extends StatelessWidget {
   final BarTab tab;
-  final Map<String, int> stockByProductId;
   final Future<void> Function(TabItem item, int delta) onItemQuantityChanged;
   final VoidCallback onCloseTabPressed;
 
   const SelectedTabDetails({
     super.key,
     required this.tab,
-    required this.stockByProductId,
     required this.onItemQuantityChanged,
     required this.onCloseTabPressed,
   });
@@ -55,7 +52,6 @@ class SelectedTabDetails extends StatelessWidget {
 
                     return TabItemRow(
                       item: item,
-                      stockByProductId: stockByProductId,
                       onQuantityChanged: onItemQuantityChanged,
                     );
                   },
@@ -108,13 +104,11 @@ class SelectedTabDetails extends StatelessWidget {
 
 class TabItemRow extends StatelessWidget {
   final TabItem item;
-  final Map<String, int> stockByProductId;
   final Future<void> Function(TabItem item, int delta) onQuantityChanged;
 
   const TabItemRow({
     super.key,
     required this.item,
-    required this.stockByProductId,
     required this.onQuantityChanged,
   });
 
@@ -125,23 +119,15 @@ class TabItemRow extends StatelessWidget {
       await onQuantityChanged(item, delta);
     } catch (e) {
       if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(
-          content: Text(
-            e is InsufficientStockException
-                ? l10n.productOutOfStock
-                : l10n.couldNotUpdateQuantity,
-          ),
-        ),
-      );
+      ScaffoldMessenger.of(
+        context,
+      ).showSnackBar(SnackBar(content: Text(l10n.couldNotUpdateQuantity)));
     }
   }
 
   @override
   Widget build(BuildContext context) {
     final scheme = Theme.of(context).colorScheme;
-    final availableStock = stockByProductId[item.productId];
-    final canIncrease = availableStock == null || availableStock > 0;
 
     return Padding(
       padding: const EdgeInsets.symmetric(vertical: 10),
@@ -188,9 +174,7 @@ class TabItemRow extends StatelessWidget {
                 ),
                 IconButton(
                   visualDensity: VisualDensity.compact,
-                  onPressed: canIncrease
-                      ? () => _changeQuantity(context, 1)
-                      : null,
+                  onPressed: () => _changeQuantity(context, 1),
                   icon: const Icon(Icons.add_rounded, size: 18),
                 ),
               ],