feat: add more detailed history and group per day

test/history_view_model_test.dart

@@ -0,0 +1,108 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:kooltab2/models/bar_tab.dart';
+import 'package:kooltab2/models/closed_tab.dart';
+import 'package:kooltab2/models/payment_method.dart';
+import 'package:kooltab2/services/bar_tab_service.dart';
+import 'package:kooltab2/viewmodels/history_view_model.dart';
+import 'package:mocktail/mocktail.dart';
+
+class MockBarTabService extends Mock implements BarTabService {}
+
+void main() {
+  late MockBarTabService service;
+  late HistoryViewModel viewModel;
+
+  setUp(() {
+    service = MockBarTabService();
+    viewModel = HistoryViewModel(barTabService: service);
+
+    when(
+      () => service.getClosedTabsPaginated(
+        limit: 20,
+        offset: 0,
+        customerName: null,
+      ),
+    ).thenAnswer((_) async => []);
+    when(
+      () => service.getClosedTabCount(customerName: null),
+    ).thenAnswer((_) async => 0);
+    when(() => service.getDistinctCustomerNames()).thenAnswer((_) async => []);
+    when(
+      () => service.getOpenTabs(includeRemoved: true),
+    ).thenAnswer((_) async => [_openTab]);
+  });
+
+  test('loads open tabs for the top of history', () async {
+    await viewModel.load();
+
+    expect(viewModel.openTabs, hasLength(1));
+    expect(viewModel.openTabs.first.customerName, 'Alice');
+    expect(viewModel.customerNames, ['Alice']);
+  });
+
+  test('search filters open tabs as well as closed tabs', () async {
+    await viewModel.load();
+
+    viewModel.search('bob');
+
+    expect(viewModel.openTabs, isEmpty);
+  });
+
+  test('sorts closed and open tabs newest first', () async {
+    final olderClosedTab = _closedTab('closed-old', DateTime(2026, 8, 1));
+    final newerClosedTab = _closedTab('closed-new', DateTime(2026, 8, 3));
+    final olderOpenTab = _barTab('open-old', DateTime(2026, 8, 1));
+    final newerOpenTab = _barTab('open-new', DateTime(2026, 8, 3));
+
+    when(
+      () => service.getClosedTabsPaginated(
+        limit: 20,
+        offset: 0,
+        customerName: null,
+      ),
+    ).thenAnswer((_) async => [olderClosedTab, newerClosedTab]);
+    when(
+      () => service.getClosedTabCount(customerName: null),
+    ).thenAnswer((_) async => 2);
+    when(
+      () => service.getOpenTabs(includeRemoved: true),
+    ).thenAnswer((_) async => [olderOpenTab, newerOpenTab]);
+
+    await viewModel.load();
+
+    expect(viewModel.closedTabs.map((tab) => tab.id), [
+      'closed-new',
+      'closed-old',
+    ]);
+    expect(viewModel.openTabs.map((tab) => tab.id), ['open-new', 'open-old']);
+  });
+}
+
+ClosedTab _closedTab(String id, DateTime closedAt) {
+  return ClosedTab(
+    id: id,
+    originalTabId: id,
+    customerName: id,
+    closedAt: closedAt,
+    paymentMethod: PaymentMethod.cash,
+    items: const [],
+  );
+}
+
+BarTab _barTab(String id, DateTime openedAt) {
+  return BarTab(
+    id: id,
+    customerName: id,
+    status: 'open',
+    openedAt: openedAt,
+    items: const [],
+  );
+}
+
+final _openTab = BarTab(
+  id: 'tab-1',
+  customerName: 'Alice',
+  status: 'open',
+  openedAt: DateTime(2026, 8, 2, 12),
+  items: const [],
+);