fix: reformat code / code improvements

lib/viewmodels/dev_menu_view_model.dart

@@ -2,6 +2,7 @@ import 'package:flutter/foundation.dart';
 import 'package:drift/drift.dart';
 import 'package:kooltab2/database/app_database.dart';
 import 'package:kooltab2/services/bar_tab_service.dart';
+import 'package:kooltab2/models/payment_method.dart';
 import 'package:kooltab2/services/pin_lock_service.dart';
 import 'package:kooltab2/services/product_service.dart';
 import 'package:kooltab2/services/settings_service.dart';
@@ -275,7 +276,7 @@ class DevMenuViewModel extends ChangeNotifier {
         'Sam', 'Tina', 'Umar', 'Vera', 'Wes', 'Xena',
         'Yves', 'Zara',
       ];
-      const paymentMethods = ['cash', 'payconiq'];
+      const paymentMethods = [PaymentMethod.cash, PaymentMethod.payconiq];
 
       await database.transaction(() async {
         for (var i = 0; i < count; i++) {
@@ -297,7 +298,7 @@ class DevMenuViewModel extends ChangeNotifier {
               originalTabId: uuid.v4(),
               customerName: customer,
               closedAt: closedAt,
-              paymentMethod: Value(paymentMethods[(i * 3) % paymentMethods.length]),
+              paymentMethod: Value(paymentMethods[(i * 3) % paymentMethods.length].value),
             ),
           );