feat: add more detailed history and group per day

test/dev_menu_view_model_test.dart

@@ -0,0 +1,78 @@
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:kooltab2/database/app_database.dart';
+import 'package:kooltab2/models/product.dart';
+import 'package:kooltab2/services/bar_tab_service.dart';
+import 'package:kooltab2/services/pin_lock_service.dart';
+import 'package:kooltab2/services/product_service.dart';
+import 'package:kooltab2/services/settings_service.dart';
+import 'package:kooltab2/viewmodels/dev_menu_view_model.dart';
+import 'package:mocktail/mocktail.dart';
+
+class MockBarTabService extends Mock implements BarTabService {}
+
+class MockPinLockService extends Mock implements PinLockService {}
+
+class MockProductService extends Mock implements ProductService {}
+
+class MockSettingsService extends Mock implements SettingsService {}
+
+void main() {
+  late AppDatabase database;
+  late MockProductService productService;
+  late DevMenuViewModel viewModel;
+
+  setUp(() {
+    database = AppDatabase(NativeDatabase.memory());
+    productService = MockProductService();
+
+    when(() => productService.getProducts()).thenAnswer(
+      (_) async => const [
+        Product(
+          id: 'product-1',
+          name: 'Cola',
+          category: 'Drinks',
+          stockQuantity: 100,
+          lowStockThreshold: 10,
+          priceInCents: 250,
+        ),
+        Product(
+          id: 'product-2',
+          name: 'Chips',
+          category: 'Snacks',
+          stockQuantity: 100,
+          lowStockThreshold: 10,
+          priceInCents: 150,
+        ),
+      ],
+    );
+
+    viewModel = DevMenuViewModel(
+      database: database,
+      productService: productService,
+      barTabService: MockBarTabService(),
+      settingsService: MockSettingsService(),
+      pinLockService: MockPinLockService(),
+    );
+  });
+
+  tearDown(() async {
+    await database.close();
+  });
+
+  test('generates individual timestamped mock history items', () async {
+    await viewModel.generateMockOrders(count: 12);
+
+    final tabs = await database.select(database.closedTabs).get();
+    final items = await database.select(database.closedTabItems).get();
+
+    expect(tabs, hasLength(12));
+    expect(items, isNotEmpty);
+    expect(items.every((item) => item.quantity == 1), isTrue);
+    expect(items.every((item) => item.purchasedAt != null), isTrue);
+    expect(
+      viewModel.lastAction,
+      startsWith('Generated 12 mock orders across '),
+    );
+  });
+}