feat: add more detailed history and group per day

lib/database/app_database.dart

@@ -63,6 +63,21 @@ class TabItems extends Table {
   Set<Column> get primaryKey => {id};
 }
 
+@DataClassName('TabItemPurchaseRow')
+class TabItemPurchases extends Table {
+  TextColumn get id => text()();
+
+  TextColumn get tabItemId =>
+      text().references(TabItems, #id, onDelete: KeyAction.cascade)();
+
+  DateTimeColumn get purchasedAt => dateTime()();
+
+  DateTimeColumn get removedAt => dateTime().nullable()();
+
+  @override
+  Set<Column> get primaryKey => {id};
+}
+
 @DataClassName('ClosedTabsRow')
 class ClosedTabs extends Table {
   TextColumn get id => text()();
@@ -93,6 +108,10 @@ class ClosedTabItems extends Table {
 
   IntColumn get unitPriceInCents => integer()();
 
+  DateTimeColumn get purchasedAt => dateTime().nullable()();
+
+  DateTimeColumn get removedAt => dateTime().nullable()();
+
   @override
   Set<Column> get primaryKey => {id};
 }
@@ -124,6 +143,7 @@ class AppSettingsTable extends Table {
     Products,
     BarTabs,
     TabItems,
+    TabItemPurchases,
 
     ClosedTabs,
     ClosedTabItems,
@@ -135,7 +155,7 @@ class AppDatabase extends _$AppDatabase {
   AppDatabase([QueryExecutor? executor]) : super(executor ?? _openConnection());
 
   @override
-  int get schemaVersion => 9;
+  int get schemaVersion => 11;
 
   @override
   MigrationStrategy get migration {
@@ -144,14 +164,18 @@ class AppDatabase extends _$AppDatabase {
         await migrator.createAll();
       },
       onUpgrade: (migrator, from, to) async {
-        Future<bool> hasSettingsColumn(String columnName) async {
+        Future<bool> hasTableColumn(String tableName, String columnName) async {
           final columns = await migrator.database
-              .customSelect('PRAGMA table_info(app_settings)')
+              .customSelect('PRAGMA table_info($tableName)')
               .get();
 
           return columns.any((column) => column.data['name'] == columnName);
         }
 
+        Future<bool> hasSettingsColumn(String columnName) {
+          return hasTableColumn('app_settings', columnName);
+        }
+
         if (from < 2) {
           await migrator.createTable(barTabs);
           await migrator.createTable(tabItems);
@@ -170,7 +194,8 @@ class AppDatabase extends _$AppDatabase {
           await migrator.createTable(appSettingsTable);
         }
 
-        if (from < 6) {
+        if (from < 6 &&
+            !await hasTableColumn('closed_tabs', 'payment_method')) {
           await migrator.addColumn(closedTabs, closedTabs.paymentMethod);
         }
 
@@ -191,6 +216,22 @@ class AppDatabase extends _$AppDatabase {
             appSettingsTable.autoLockEnabled,
           );
         }
+
+        if (from < 10) {
+          if (!await hasTableColumn('closed_tab_items', 'purchased_at')) {
+            await migrator.addColumn(
+              closedTabItems,
+              closedTabItems.purchasedAt,
+            );
+          }
+          if (!await hasTableColumn('closed_tab_items', 'removed_at')) {
+            await migrator.addColumn(closedTabItems, closedTabItems.removedAt);
+          }
+        }
+
+        if (from < 11) {
+          await migrator.createTable(tabItemPurchases);
+        }
       },
     );
   }

lib/l10n/app_en.arb

@@ -83,6 +83,7 @@
   "@version": {"placeholders": {"version": {"type": "String"}}},
   "selectTabToAddItems": "Select a tab to add items",
   "openTabs": "Open tabs",
+  "closedTabs": "Closed tabs",
   "selectOrOpenTab": "Select or open a tab",
   "noOpenTabs": "No open tabs",
   "edit": "Edit",
@@ -113,6 +114,7 @@
   "pinsDidNotMatch": "PINs didn’t match. Try again.",
   "somethingWentWrong": "Something went wrong.",
   "incorrectPin": "Incorrect PIN.",
+  "removed": "Removed",
   "enterPrice": "Enter a price.",
   "enterValidPrice": "Enter a valid price.",
   "enterValidStock": "Enter a valid stock amount.",
@@ -213,8 +215,8 @@
   "stressTestGrid": "Stress test product grid",
   "simulateLowStock": "Simulate low stock",
   "setProductsBelowThreshold": "Set all products below threshold",
-  "generateMockOrders": "Generate 100 mock orders",
-  "randomCustomersItemsAmounts": "Random customers, items, and amounts",
+  "generateMockOrders": "Generate mock order history",
+  "randomCustomersItemsAmounts": "100 orders across days with random products and purchase times",
   "performance": "Performance",
   "clearImageCache": "Clear image cache",
   "reloadProductImages": "Reload product images",

lib/l10n/app_localizations.dart

@@ -578,6 +578,12 @@ abstract class AppLocalizations {
   /// **'Open tabs'**
   String get openTabs;
 
+  /// No description provided for @closedTabs.
+  ///
+  /// In en, this message translates to:
+  /// **'Closed tabs'**
+  String get closedTabs;
+
   /// No description provided for @selectOrOpenTab.
   ///
   /// In en, this message translates to:
@@ -740,6 +746,12 @@ abstract class AppLocalizations {
   /// **'Incorrect PIN.'**
   String get incorrectPin;
 
+  /// No description provided for @removed.
+  ///
+  /// In en, this message translates to:
+  /// **'Removed'**
+  String get removed;
+
   /// No description provided for @enterPrice.
   ///
   /// In en, this message translates to:
@@ -1319,13 +1331,13 @@ abstract class AppLocalizations {
   /// No description provided for @generateMockOrders.
   ///
   /// In en, this message translates to:
-  /// **'Generate 100 mock orders'**
+  /// **'Generate mock order history'**
   String get generateMockOrders;
 
   /// No description provided for @randomCustomersItemsAmounts.
   ///
   /// In en, this message translates to:
-  /// **'Random customers, items, and amounts'**
+  /// **'100 orders across days with random products and purchase times'**
   String get randomCustomersItemsAmounts;
 
   /// No description provided for @performance.

lib/l10n/app_localizations_en.dart

@@ -258,6 +258,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get openTabs => 'Open tabs';
 
+  @override
+  String get closedTabs => 'Closed tabs';
+
   @override
   String get selectOrOpenTab => 'Select or open a tab';
 
@@ -358,6 +361,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get incorrectPin => 'Incorrect PIN.';
 
+  @override
+  String get removed => 'Removed';
+
   @override
   String get enterPrice => 'Enter a price.';
 
@@ -660,11 +666,11 @@ class AppLocalizationsEn extends AppLocalizations {
   String get setProductsBelowThreshold => 'Set all products below threshold';
 
   @override
-  String get generateMockOrders => 'Generate 100 mock orders';
+  String get generateMockOrders => 'Generate mock order history';
 
   @override
   String get randomCustomersItemsAmounts =>
-      'Random customers, items, and amounts';
+      '100 orders across days with random products and purchase times';
 
   @override
   String get performance => 'Performance';

lib/l10n/app_localizations_nl.dart

@@ -258,6 +258,9 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get openTabs => 'Open poefs';
 
+  @override
+  String get closedTabs => 'Gesloten poefs';
+
   @override
   String get selectOrOpenTab => 'Selecteer of open een poef';
 
@@ -359,6 +362,9 @@ class AppLocalizationsNl extends AppLocalizations {
   @override
   String get incorrectPin => 'Onjuiste PIN.';
 
+  @override
+  String get removed => 'Verwijderd';
+
   @override
   String get enterPrice => 'Voer een prijs in.';
 
@@ -668,11 +674,11 @@ class AppLocalizationsNl extends AppLocalizations {
       'Alle producten onder de drempel instellen';
 
   @override
-  String get generateMockOrders => '100 testbestellingen genereren';
+  String get generateMockOrders => 'Mock-bestelgeschiedenis genereren';
 
   @override
   String get randomCustomersItemsAmounts =>
-      'Willekeurige klanten, items en bedragen';
+      '100 bestellingen over meerdere dagen met willekeurige producten en tijden';
 
   @override
   String get performance => 'Prestaties';

lib/l10n/app_nl.arb

@@ -83,6 +83,7 @@
   "@version": {"placeholders": {"version": {"type": "String"}}},
   "selectTabToAddItems": "Selecteer een poef om items toe te voegen",
   "openTabs": "Open poefs",
+  "closedTabs": "Gesloten poefs",
   "selectOrOpenTab": "Selecteer of open een poef",
   "noOpenTabs": "Geen open poefs",
   "edit": "Bewerken",
@@ -113,6 +114,7 @@
   "pinsDidNotMatch": "PINs kwamen niet overeen. Probeer het opnieuw.",
   "somethingWentWrong": "Er is iets misgegaan.",
   "incorrectPin": "Onjuiste PIN.",
+  "removed": "Verwijderd",
   "enterPrice": "Voer een prijs in.",
   "enterValidPrice": "Voer een geldige prijs in.",
   "enterValidStock": "Voer een geldige voorraad in.",
@@ -213,8 +215,8 @@
   "stressTestGrid": "Productraster stresstesten",
   "simulateLowStock": "Lage voorraad simuleren",
   "setProductsBelowThreshold": "Alle producten onder de drempel instellen",
-  "generateMockOrders": "100 testbestellingen genereren",
-  "randomCustomersItemsAmounts": "Willekeurige klanten, items en bedragen",
+  "generateMockOrders": "Mock-bestelgeschiedenis genereren",
+  "randomCustomersItemsAmounts": "100 bestellingen over meerdere dagen met willekeurige producten en tijden",
   "performance": "Prestaties",
   "clearImageCache": "Afbeeldingencache wissen",
   "reloadProductImages": "Productafbeeldingen opnieuw laden",

lib/models/closed_tab.dart

@@ -9,7 +9,7 @@ class ClosedTab {
   final String originalTabId;
   final String customerName;
   final DateTime closedAt;
-final PaymentMethod paymentMethod;
+  final PaymentMethod paymentMethod;
 
   final List<ClosedTabItem> items;
   const ClosedTab({
@@ -21,10 +21,11 @@ final PaymentMethod paymentMethod;
     required this.items,
   });
 
-  int get itemCount => items.fold(0, (sum, item) => sum + item.quantity);
+  int get itemCount =>
+      items.fold(0, (sum, item) => sum + (item.isRemoved ? 0 : item.quantity));
 
   int get totalInCents =>
-      items.fold(0, (sum, item) => sum + item.quantity * item.unitPriceInCents);
+      items.fold(0, (sum, item) => sum + item.lineTotalInCents);
 
   String get formattedTotal =>
       NumberFormat.simpleCurrency().format(totalInCents / 100);
@@ -44,13 +45,13 @@ final PaymentMethod paymentMethod;
 
   @override
   int get hashCode => Object.hash(
-        id,
-        originalTabId,
-        customerName,
-        closedAt,
-        paymentMethod,
-        Object.hashAll(items),
-      );
+    id,
+    originalTabId,
+    customerName,
+    closedAt,
+    paymentMethod,
+    Object.hashAll(items),
+  );
 }
 
-// _listEquals moved to utils/collection_utils.dart
+// _listEquals moved to utils/collection_utils.dart

lib/models/closed_tab_item.dart

@@ -5,6 +5,8 @@ class ClosedTabItem {
   final String productName;
   final int quantity;
   final int unitPriceInCents;
+  final DateTime? purchasedAt;
+  final DateTime? removedAt;
 
   ClosedTabItem({
     required this.id,
@@ -13,9 +15,13 @@ class ClosedTabItem {
     required this.productName,
     required this.quantity,
     required this.unitPriceInCents,
+    this.purchasedAt,
+    this.removedAt,
   });
 
-  int get lineTotalInCents => quantity * unitPriceInCents;
+  bool get isRemoved => removedAt != null;
+
+  int get lineTotalInCents => isRemoved ? 0 : quantity * unitPriceInCents;
 
   @override
   bool operator ==(Object other) =>
@@ -26,15 +32,19 @@ class ClosedTabItem {
           productId == other.productId &&
           productName == other.productName &&
           quantity == other.quantity &&
-          unitPriceInCents == other.unitPriceInCents;
+          unitPriceInCents == other.unitPriceInCents &&
+          purchasedAt == other.purchasedAt &&
+          removedAt == other.removedAt;
 
   @override
   int get hashCode => Object.hash(
-        id,
-        closedTabId,
-        productId,
-        productName,
-        quantity,
-        unitPriceInCents,
-      );
+    id,
+    closedTabId,
+    productId,
+    productName,
+    quantity,
+    unitPriceInCents,
+    purchasedAt,
+    removedAt,
+  );
 }

lib/models/tab_item.dart

@@ -1,3 +1,6 @@
+import 'tab_item_purchase.dart';
+import '../utils/collection_utils.dart';
+
 class TabItem {
   final String id;
   final String tabId;
@@ -5,6 +8,7 @@ class TabItem {
   final String productName;
   final int quantity;
   final int unitPriceInCents;
+  final List<TabItemPurchase> purchases;
 
   const TabItem({
     required this.id,
@@ -13,6 +17,7 @@ class TabItem {
     required this.productName,
     required this.quantity,
     required this.unitPriceInCents,
+    this.purchases = const [],
   });
 
   int get lineTotalInCents => quantity * unitPriceInCents;
@@ -34,15 +39,17 @@ class TabItem {
           productId == other.productId &&
           productName == other.productName &&
           quantity == other.quantity &&
-          unitPriceInCents == other.unitPriceInCents;
+          unitPriceInCents == other.unitPriceInCents &&
+          listEquals(purchases, other.purchases);
 
   @override
   int get hashCode => Object.hash(
-        id,
-        tabId,
-        productId,
-        productName,
-        quantity,
-        unitPriceInCents,
-      );
+    id,
+    tabId,
+    productId,
+    productName,
+    quantity,
+    unitPriceInCents,
+    Object.hashAll(purchases),
+  );
 }

lib/models/tab_item_purchase.dart

@@ -0,0 +1,27 @@
+class TabItemPurchase {
+  final String id;
+  final String tabItemId;
+  final DateTime purchasedAt;
+  final DateTime? removedAt;
+
+  const TabItemPurchase({
+    required this.id,
+    required this.tabItemId,
+    required this.purchasedAt,
+    this.removedAt,
+  });
+
+  bool get isRemoved => removedAt != null;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is TabItemPurchase &&
+          id == other.id &&
+          tabItemId == other.tabItemId &&
+          purchasedAt == other.purchasedAt &&
+          removedAt == other.removedAt;
+
+  @override
+  int get hashCode => Object.hash(id, tabItemId, purchasedAt, removedAt);
+}

lib/services/bar_tab_service.dart

@@ -8,10 +8,11 @@ import '../models/closed_tab_item.dart';
 import '../models/payment_method.dart';
 import '../models/product.dart';
 import '../models/tab_item.dart';
+import '../models/tab_item_purchase.dart';
 import 'product_service.dart';
 
 abstract class BarTabService {
-  Future<List<BarTab>> getOpenTabs();
+  Future<List<BarTab>> getOpenTabs({bool includeRemoved = false});
 
   Future<BarTab?> getTabById(String id);
 
@@ -58,7 +59,16 @@ class DriftBarTabService implements BarTabService {
 
   DriftBarTabService({required this.database});
 
-  TabItem _mapItemRow(TabItemRow row) {
+  TabItemPurchase _mapPurchaseRow(TabItemPurchaseRow row) {
+    return TabItemPurchase(
+      id: row.id,
+      tabItemId: row.tabItemId,
+      purchasedAt: row.purchasedAt,
+      removedAt: row.removedAt,
+    );
+  }
+
+  TabItem _mapItemRow(TabItemRow row, List<TabItemPurchase> purchases) {
     return TabItem(
       id: row.id,
       tabId: row.tabId,
@@ -66,6 +76,7 @@ class DriftBarTabService implements BarTabService {
       productName: row.productName,
       quantity: row.quantity,
       unitPriceInCents: row.unitPriceInCents,
+      purchases: purchases,
     );
   }
 
@@ -88,6 +99,8 @@ class DriftBarTabService implements BarTabService {
       productName: row.productName,
       quantity: row.quantity,
       unitPriceInCents: row.unitPriceInCents,
+      purchasedAt: row.purchasedAt,
+      removedAt: row.removedAt,
     );
   }
 
@@ -98,7 +111,97 @@ class DriftBarTabService implements BarTabService {
 
     final rows = await query.get();
 
-    return rows.map(_mapItemRow).toList();
+    final items = <TabItem>[];
+
+    for (final row in rows) {
+      if (row.quantity <= 0) continue;
+
+      final purchases = await _getPurchaseRecords(row);
+      items.add(_mapItemRow(row, purchases));
+    }
+
+    return items;
+  }
+
+  Future<List<TabItem>> _getItemsForHistory(String tabId) async {
+    final query = database.select(database.tabItems)
+      ..where((item) => item.tabId.equals(tabId))
+      ..orderBy([(item) => OrderingTerm.asc(item.createdAt)]);
+
+    final rows = await query.get();
+    final items = <TabItem>[];
+
+    for (final row in rows) {
+      final purchases = await _getPurchaseRecords(row);
+      if (purchases.isEmpty) continue;
+
+      items.add(_mapItemRow(row, purchases));
+    }
+
+    return items;
+  }
+
+  Future<List<TabItemPurchaseRow>> _getPurchaseRows(String tabItemId) async {
+    final query = database.select(database.tabItemPurchases)
+      ..where((purchase) => purchase.tabItemId.equals(tabItemId))
+      ..orderBy([
+        (purchase) => OrderingTerm.asc(purchase.purchasedAt),
+        (purchase) => OrderingTerm.asc(purchase.id),
+      ]);
+
+    return query.get();
+  }
+
+  Future<List<TabItemPurchase>> _getPurchaseRecords(TabItemRow item) async {
+    final rows = await _getPurchaseRows(item.id);
+    final purchases = rows.map(_mapPurchaseRow).toList();
+    final activeCount = purchases
+        .where((purchase) => !purchase.isRemoved)
+        .length;
+    final missingActivePurchases = item.quantity - activeCount;
+
+    if (missingActivePurchases <= 0) return purchases;
+
+    return [
+      ...purchases,
+      for (var index = 0; index < missingActivePurchases; index++)
+        TabItemPurchase(
+          id: 'legacy-${item.id}-$index',
+          tabItemId: item.id,
+          purchasedAt: item.createdAt,
+        ),
+    ];
+  }
+
+  Future<List<TabItemPurchaseRow>> _ensurePurchaseRows(TabItemRow item) async {
+    final rows = await _getPurchaseRows(item.id);
+    final activeCount = rows
+        .where((purchase) => purchase.removedAt == null)
+        .length;
+    final missingActivePurchases = item.quantity - activeCount;
+
+    for (var index = 0; index < missingActivePurchases; index++) {
+      await _recordPurchase(tabItemId: item.id, purchasedAt: item.createdAt);
+    }
+
+    if (missingActivePurchases <= 0) return rows;
+
+    return _getPurchaseRows(item.id);
+  }
+
+  Future<void> _recordPurchase({
+    required String tabItemId,
+    DateTime? purchasedAt,
+  }) async {
+    await database
+        .into(database.tabItemPurchases)
+        .insert(
+          TabItemPurchasesCompanion.insert(
+            id: _uuid.v4(),
+            tabItemId: tabItemId,
+            purchasedAt: purchasedAt ?? DateTime.now(),
+          ),
+        );
   }
 
   Future<void> _decreaseProductStock(String productId, int amount) async {
@@ -150,7 +253,7 @@ class DriftBarTabService implements BarTabService {
   }
 
   @override
-  Future<List<BarTab>> getOpenTabs() async {
+  Future<List<BarTab>> getOpenTabs({bool includeRemoved = false}) async {
     final query = database.select(database.barTabs)
       ..where((tab) => tab.status.equals('open'))
       ..orderBy([(tab) => OrderingTerm.desc(tab.openedAt)]);
@@ -160,7 +263,9 @@ class DriftBarTabService implements BarTabService {
     final tabs = <BarTab>[];
 
     for (final tabRow in tabRows) {
-      final items = await _getItemsForTab(tabRow.id);
+      final items = includeRemoved
+          ? await _getItemsForHistory(tabRow.id)
+          : await _getItemsForTab(tabRow.id);
 
       tabs.add(_mapTabRow(tabRow, items));
     }
@@ -286,15 +391,18 @@ class DriftBarTabService implements BarTabService {
         await updateQuery.write(
           TabItemsCompanion(quantity: Value(existingItem.quantity + 1)),
         );
+        await _recordPurchase(tabItemId: existingItem.id);
 
         return;
       }
 
+      final tabItemId = _uuid.v4();
+
       await database
           .into(database.tabItems)
           .insert(
             TabItemsCompanion.insert(
-              id: _uuid.v4(),
+              id: tabItemId,
               tabId: tabId,
               productId: product.id,
               productName: product.name,
@@ -303,6 +411,8 @@ class DriftBarTabService implements BarTabService {
               createdAt: DateTime.now(),
             ),
           );
+
+      await _recordPurchase(tabItemId: tabItemId);
     });
   }
 
@@ -316,24 +426,47 @@ class DriftBarTabService implements BarTabService {
         database.tabItems,
       )..where((row) => row.id.equals(tabItemId))).getSingleOrNull();
 
-      if (item == null || delta == 0) return 0;
+      if (item == null || delta == 0 || (item.quantity == 0 && delta < 0)) {
+        return 0;
+      }
 
       final requestedQuantity = item.quantity + delta;
       final actualDelta = requestedQuantity <= 0 ? -item.quantity : delta;
 
       if (actualDelta > 0) {
         await _decreaseProductStock(item.productId, actualDelta);
+
+        for (var index = 0; index < actualDelta; index++) {
+          await _recordPurchase(tabItemId: item.id);
+        }
       } else {
         await _increaseProductStock(item.productId, -actualDelta);
+
+        final purchaseRows = await _ensurePurchaseRows(item);
+        final activePurchaseRows =
+            purchaseRows
+                .where((purchase) => purchase.removedAt == null)
+                .toList()
+              ..sort((a, b) => b.purchasedAt.compareTo(a.purchasedAt));
+        final removedAt = DateTime.now();
+
+        for (final purchase in activePurchaseRows.take(-actualDelta)) {
+          await (database.update(database.tabItemPurchases)
+                ..where((row) => row.id.equals(purchase.id)))
+              .write(TabItemPurchasesCompanion(removedAt: Value(removedAt)));
+        }
       }
 
       if (requestedQuantity <= 0) {
-        final deletedRows = await (database.delete(
-          database.tabItems,
-        )..where((row) => row.id.equals(tabItemId))).go();
+        final updatedRows =
+            await (database.update(database.tabItems)
+                  ..where((row) => row.id.equals(tabItemId)))
+                .write(const TabItemsCompanion(quantity: Value(0)));
 
-        if (deletedRows != 1) {
-          throw StateError('Tab item was changed before it could be deleted');
+        if (updatedRows != 1) {
+          throw StateError(
+            'Tab item was changed before its quantity was updated',
+          );
         }
       } else {
         final updatedRows =
@@ -367,7 +500,7 @@ class DriftBarTabService implements BarTabService {
         return;
       }
 
-      final items = await _getItemsForTab(tabId);
+      final items = await _getItemsForHistory(tabId);
 
       if (items.isEmpty) {
         return;
@@ -388,18 +521,22 @@ class DriftBarTabService implements BarTabService {
           );
 
       for (final item in items) {
-        await database
-            .into(database.closedTabItems)
-            .insert(
-              ClosedTabItemsCompanion.insert(
-                id: _uuid.v4(),
-                closedTabId: closedTabId,
-                productId: item.productId,
-                productName: item.productName,
-                quantity: item.quantity,
-                unitPriceInCents: item.unitPriceInCents,
-              ),
-            );
+        for (final purchase in item.purchases) {
+          await database
+              .into(database.closedTabItems)
+              .insert(
+                ClosedTabItemsCompanion.insert(
+                  id: _uuid.v4(),
+                  closedTabId: closedTabId,
+                  productId: item.productId,
+                  productName: item.productName,
+                  quantity: 1,
+                  unitPriceInCents: item.unitPriceInCents,
+                  purchasedAt: Value(purchase.purchasedAt),
+                  removedAt: Value(purchase.removedAt),
+                ),
+              );
+        }
       }
 
       final deleteQuery = database.delete(database.tabItems)
@@ -437,7 +574,11 @@ class DriftBarTabService implements BarTabService {
 
     for (final row in closedTabRows) {
       final itemsQuery = database.select(database.closedTabItems)
-        ..where((item) => item.closedTabId.equals(row.id));
+        ..where((item) => item.closedTabId.equals(row.id))
+        ..orderBy([
+          (item) => OrderingTerm.desc(item.purchasedAt),
+          (item) => OrderingTerm.desc(item.id),
+        ]);
 
       final itemRows = await itemsQuery.get();
 

lib/services/export_service.dart

@@ -49,19 +49,27 @@ class DefaultExportService implements ExportService {
 
       final itemRows = await itemsQuery.get();
 
-      result.add(_ClosedTabExport(
-        id: tabRow.id,
-        originalTabId: tabRow.originalTabId,
-        customerName: tabRow.customerName,
-        closedAt: tabRow.closedAt.toIso8601String(),
-        paymentMethod: tabRow.paymentMethod,
-        items: itemRows.map((row) => _ClosedTabItemExport(
-          productId: row.productId,
-          productName: row.productName,
-          quantity: row.quantity,
-          unitPriceInCents: row.unitPriceInCents,
-        )).toList(),
-      ));
+      result.add(
+        _ClosedTabExport(
+          id: tabRow.id,
+          originalTabId: tabRow.originalTabId,
+          customerName: tabRow.customerName,
+          closedAt: tabRow.closedAt.toIso8601String(),
+          paymentMethod: tabRow.paymentMethod,
+          items: itemRows
+              .map(
+                (row) => _ClosedTabItemExport(
+                  productId: row.productId,
+                  productName: row.productName,
+                  quantity: row.quantity,
+                  unitPriceInCents: row.unitPriceInCents,
+                  purchasedAt: row.purchasedAt?.toIso8601String(),
+                  removedAt: row.removedAt?.toIso8601String(),
+                ),
+              )
+              .toList(),
+        ),
+      );
     }
 
     return result;
@@ -71,22 +79,39 @@ class DefaultExportService implements ExportService {
     return {
       'exportedAt': DateTime.now().toIso8601String(),
       'appVersion': '1.0.7',
-      'closedTabs': tabs.map((tab) => {
-        'id': tab.id,
-        'originalTabId': tab.originalTabId,
-        'customerName': tab.customerName,
-        'closedAt': tab.closedAt,
-        'paymentMethod': tab.paymentMethod,
-        'items': tab.items.map((item) => {
-          'productId': item.productId,
-          'productName': item.productName,
-          'quantity': item.quantity,
-          'unitPriceInCents': item.unitPriceInCents,
-          'lineTotalInCents': item.quantity * item.unitPriceInCents,
-        }).toList(),
-        'itemCount': tab.items.fold(0, (sum, item) => sum + item.quantity),
-        'totalInCents': tab.items.fold(0, (sum, item) => sum + item.quantity * item.unitPriceInCents),
-      }).toList(),
+      'closedTabs': tabs
+          .map(
+            (tab) => {
+              'id': tab.id,
+              'originalTabId': tab.originalTabId,
+              'customerName': tab.customerName,
+              'closedAt': tab.closedAt,
+              'paymentMethod': tab.paymentMethod,
+              'items': tab.items
+                  .map(
+                    (item) => {
+                      'productId': item.productId,
+                      'productName': item.productName,
+                      'quantity': item.quantity,
+                      'unitPriceInCents': item.unitPriceInCents,
+                      'purchasedAt': item.purchasedAt,
+                      'removedAt': item.removedAt,
+                      'isRemoved': item.isRemoved,
+                      'lineTotalInCents': item.lineTotalInCents,
+                    },
+                  )
+                  .toList(),
+              'itemCount': tab.items.fold(
+                0,
+                (sum, item) => sum + (item.isRemoved ? 0 : item.quantity),
+              ),
+              'totalInCents': tab.items.fold(
+                0,
+                (sum, item) => sum + item.lineTotalInCents,
+              ),
+            },
+          )
+          .toList(),
     };
   }
 }
@@ -96,13 +121,21 @@ class _ClosedTabItemExport {
   final String productName;
   final int quantity;
   final int unitPriceInCents;
+  final String? purchasedAt;
+  final String? removedAt;
 
   _ClosedTabItemExport({
     required this.productId,
     required this.productName,
     required this.quantity,
     required this.unitPriceInCents,
+    required this.purchasedAt,
+    required this.removedAt,
   });
+
+  bool get isRemoved => removedAt != null;
+
+  int get lineTotalInCents => isRemoved ? 0 : quantity * unitPriceInCents;
 }
 
 class _ClosedTabExport {
@@ -121,4 +154,4 @@ class _ClosedTabExport {
     required this.paymentMethod,
     required this.items,
   });
-}
+}

lib/utils/history_grouping.dart

@@ -0,0 +1,48 @@
+import '../models/closed_tab_item.dart';
+
+class ClosedTabItemDayGroup {
+  final DateTime day;
+  final List<ClosedTabItem> items;
+
+  const ClosedTabItemDayGroup({required this.day, required this.items});
+
+  int get itemCount => items.fold(
+    0,
+    (total, item) => total + (item.isRemoved ? 0 : item.quantity),
+  );
+}
+
+List<ClosedTabItemDayGroup> groupClosedTabItemsByDay(
+  Iterable<ClosedTabItem> items, {
+  required DateTime fallbackDate,
+}) {
+  final groups = <DateTime, List<ClosedTabItem>>{};
+
+  for (final item in items) {
+    final localPurchasedAt = (item.purchasedAt ?? fallbackDate).toLocal();
+    final day = DateTime(
+      localPurchasedAt.year,
+      localPurchasedAt.month,
+      localPurchasedAt.day,
+    );
+    groups.putIfAbsent(day, () => []).add(item);
+  }
+
+  for (final group in groups.values) {
+    group.sort((a, b) {
+      final aTime = (a.purchasedAt ?? fallbackDate).toLocal();
+      final bTime = (b.purchasedAt ?? fallbackDate).toLocal();
+      final byTime = bTime.compareTo(aTime);
+      if (byTime != 0) return byTime;
+
+      return b.id.compareTo(a.id);
+    });
+  }
+
+  final sortedGroups = groups.entries.toList()
+    ..sort((a, b) => b.key.compareTo(a.key));
+
+  return sortedGroups
+      .map((entry) => ClosedTabItemDayGroup(day: entry.key, items: entry.value))
+      .toList();
+}

lib/viewmodels/dev_menu_view_model.dart

@@ -1,3 +1,4 @@
+import 'dart:math';
 import 'dart:io';
 
 import 'package:flutter/foundation.dart';
@@ -194,16 +195,18 @@ class DevMenuViewModel extends ChangeNotifier {
         final (name, priceInCents, stock) = demoProducts[i];
         final category = categories[i ~/ 5];
 
-        await database.into(database.products).insert(
-          ProductsCompanion.insert(
-            id: uuid.v4(),
-            name: name,
-            category: category,
-            stockQuantity: stock,
-            lowStockThreshold: 10,
-            priceInCents: priceInCents,
-          ),
-        );
+        await database
+            .into(database.products)
+            .insert(
+              ProductsCompanion.insert(
+                id: uuid.v4(),
+                name: name,
+                category: category,
+                stockQuantity: stock,
+                lowStockThreshold: 10,
+                priceInCents: priceInCents,
+              ),
+            );
       }
 
       _lastAction = 'Seeded ${demoProducts.length} demo products';
@@ -241,10 +244,7 @@ class DevMenuViewModel extends ChangeNotifier {
       final randomProducts = products.take(3).toList();
 
       for (final product in randomProducts) {
-        await barTabService.addProductToTab(
-          tabId: tab.id,
-          product: product,
-        );
+        await barTabService.addProductToTab(tabId: tab.id, product: product);
       }
 
       _lastAction = 'Created test tab with ${randomProducts.length} items';
@@ -262,16 +262,18 @@ class DevMenuViewModel extends ChangeNotifier {
       final uuid = const Uuid();
 
       for (var i = 0; i < count; i++) {
-        await database.into(database.products).insert(
-          ProductsCompanion.insert(
-            id: uuid.v4(),
-            name: 'Test Product $i',
-            category: 'Test Category ${i % 5}',
-            stockQuantity: 50 + (i % 50),
-            lowStockThreshold: 5,
-            priceInCents: 100 + (i * 10),
-          ),
-        );
+        await database
+            .into(database.products)
+            .insert(
+              ProductsCompanion.insert(
+                id: uuid.v4(),
+                name: 'Test Product $i',
+                category: 'Test Category ${i % 5}',
+                stockQuantity: 50 + (i % 50),
+                lowStockThreshold: 5,
+                priceInCents: 100 + (i * 10),
+              ),
+            );
       }
 
       _lastAction = 'Added $count test products';
@@ -341,59 +343,130 @@ class DevMenuViewModel extends ChangeNotifier {
       }
 
       final uuid = const Uuid();
+      final random = Random();
+      final today = DateTime.now();
+      final startOfToday = DateTime(today.year, today.month, today.day);
       final customerNames = [
-        'Alice', 'Bob', 'Charlie', 'Diana', 'Eve', 'Frank',
-        'Grace', 'Hank', 'Ivy', 'Jack', 'Kate', 'Leo',
-        'Mia', 'Noah', 'Olivia', 'Pete', 'Quinn', 'Rose',
-        'Sam', 'Tina', 'Umar', 'Vera', 'Wes', 'Xena',
-        'Yves', 'Zara',
+        'Alice',
+        'Bob',
+        'Charlie',
+        'Diana',
+        'Eve',
+        'Frank',
+        'Grace',
+        'Hank',
+        'Ivy',
+        'Jack',
+        'Kate',
+        'Leo',
+        'Mia',
+        'Noah',
+        'Olivia',
+        'Pete',
+        'Quinn',
+        'Rose',
+        'Sam',
+        'Tina',
+        'Umar',
+        'Vera',
+        'Wes',
+        'Xena',
+        'Yves',
+        'Zara',
       ];
       const paymentMethods = [PaymentMethod.cash, PaymentMethod.payconiq];
+      final usedCustomers = <String>{};
 
       await database.transaction(() async {
         for (var i = 0; i < count; i++) {
-          final customer = customerNames[i % customerNames.length];
+          final customer = customerNames[random.nextInt(customerNames.length)];
+          usedCustomers.add(customer);
           final closedTabId = uuid.v4();
-          final itemCount = 1 + (i % 5);
+          final distinctProductCount = min(
+            products.length,
+            1 + random.nextInt(5),
+          );
+          final shuffledProducts = [...products]..shuffle(random);
 
-          final closedAt = DateTime.now().subtract(
+          final orderDay = startOfToday.subtract(
+            Duration(days: random.nextInt(60)),
+          );
+          final closedAt = DateTime(
+            orderDay.year,
+            orderDay.month,
+            orderDay.day,
+            12 + random.nextInt(10),
+            random.nextInt(60),
+          );
+
+          // A few mock tabs span multiple days so the history day dropdowns
+          // also get realistic multi-day data.
+          final spanDays = random.nextInt(5) == 0 ? 1 + random.nextInt(2) : 0;
+          final firstPurchaseAt = closedAt.subtract(
             Duration(
-              days: i % 90,
-              hours: i % 24,
-              minutes: i % 60,
+              days: spanDays,
+              hours: random.nextInt(4),
+              minutes: random.nextInt(60),
             ),
           );
+          final purchaseWindowMinutes = closedAt
+              .difference(firstPurchaseAt)
+              .inMinutes;
 
-          await database.into(database.closedTabs).insert(
-            ClosedTabsCompanion.insert(
-              id: closedTabId,
-              originalTabId: uuid.v4(),
-              customerName: customer,
-              closedAt: closedAt,
-              paymentMethod: Value(paymentMethods[(i * 3) % paymentMethods.length].value),
-            ),
-          );
+          await database
+              .into(database.closedTabs)
+              .insert(
+                ClosedTabsCompanion.insert(
+                  id: closedTabId,
+                  originalTabId: uuid.v4(),
+                  customerName: customer,
+                  closedAt: closedAt,
+                  paymentMethod: Value(
+                    paymentMethods[random.nextInt(paymentMethods.length)].value,
+                  ),
+                ),
+              );
 
-          for (var j = 0; j < itemCount; j++) {
-            final product = products[(i + j) % products.length];
-            final quantity = 1 + ((i * 7 + j * 13) % 6);
+          for (var j = 0; j < distinctProductCount; j++) {
+            final product = shuffledProducts[j];
+            final quantity = 1 + random.nextInt(4);
 
-            await database.into(database.closedTabItems).insert(
-              ClosedTabItemsCompanion.insert(
-                id: uuid.v4(),
-                closedTabId: closedTabId,
-                productId: product.id,
-                productName: product.name,
-                quantity: quantity,
-                unitPriceInCents: product.priceInCents,
-              ),
-            );
+            for (var k = 0; k < quantity; k++) {
+              var purchasedAt = firstPurchaseAt.add(
+                Duration(minutes: random.nextInt(purchaseWindowMinutes + 1)),
+              );
+
+              if (spanDays > 0 && j == 0 && k == 0) {
+                purchasedAt = firstPurchaseAt;
+              } else if (spanDays > 0 &&
+                  j == distinctProductCount - 1 &&
+                  k == quantity - 1) {
+                purchasedAt = closedAt.subtract(
+                  Duration(minutes: random.nextInt(30)),
+                );
+              }
+
+              await database
+                  .into(database.closedTabItems)
+                  .insert(
+                    ClosedTabItemsCompanion.insert(
+                      id: uuid.v4(),
+                      closedTabId: closedTabId,
+                      productId: product.id,
+                      productName: product.name,
+                      quantity: 1,
+                      unitPriceInCents: product.priceInCents,
+                      purchasedAt: Value(purchasedAt),
+                    ),
+                  );
+            }
           }
         }
       });
 
-      _lastAction = 'Generated $count mock orders across '
-          '${customerNames.length} customers';
+      _lastAction =
+          'Generated $count mock orders across '
+          '${usedCustomers.length} customers';
     } finally {
       _isLoading = false;
       notifyListeners();

lib/viewmodels/history_view_model.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/foundation.dart';
 
+import '../models/bar_tab.dart';
 import '../models/closed_tab.dart';
 import '../services/bar_tab_service.dart';
 
@@ -11,6 +12,7 @@ class HistoryViewModel extends ChangeNotifier {
   static const int _pageSize = 20;
 
   List<ClosedTab> _closedTabs = [];
+  List<BarTab> _openTabs = [];
   List<String> _customerNames = [];
   String? _selectedCustomer;
   int _offset = 0;
@@ -22,14 +24,14 @@ class HistoryViewModel extends ChangeNotifier {
   String _searchQuery = '';
 
   List<ClosedTab> get closedTabs {
-    if (_searchQuery.isEmpty) return _closedTabs;
-
     return _closedTabs
-        .where(
-          (tab) => tab.customerName.toLowerCase().contains(
-            _searchQuery.toLowerCase(),
-          ),
-        )
+        .where((tab) => _matchesCustomer(tab.customerName))
+        .toList();
+  }
+
+  List<BarTab> get openTabs {
+    return _openTabs
+        .where((tab) => _matchesCustomer(tab.customerName))
         .toList();
   }
 
@@ -63,15 +65,19 @@ class HistoryViewModel extends ChangeNotifier {
     try {
       final results = await Future.wait([
         _fetchPage(offset: 0),
-        barTabService.getClosedTabCount(
-          customerName: _selectedCustomer,
-        ),
+        barTabService.getClosedTabCount(customerName: _selectedCustomer),
         barTabService.getDistinctCustomerNames(),
+        barTabService.getOpenTabs(includeRemoved: true),
       ]);
 
-      _closedTabs = results[0] as List<ClosedTab>;
+      _closedTabs = (results[0] as List<ClosedTab>).toList()
+        ..sort(_compareClosedTabs);
       _totalCount = results[1] as int;
-      _customerNames = results[2] as List<String>;
+      _openTabs = (results[3] as List<BarTab>).toList()..sort(_compareOpenTabs);
+      _customerNames = {
+        ...(results[2] as List<String>),
+        ..._openTabs.map((tab) => tab.customerName),
+      }.toList()..sort();
       _offset = _closedTabs.length;
     } catch (e) {
       debugPrint('HistoryViewModel: load error: $e');
@@ -91,7 +97,7 @@ class HistoryViewModel extends ChangeNotifier {
 
     try {
       final more = await _fetchPage(offset: _offset);
-      _closedTabs = [..._closedTabs, ...more];
+      _closedTabs = [..._closedTabs, ...more]..sort(_compareClosedTabs);
       _offset = _closedTabs.length;
     } catch (e) {
       debugPrint('HistoryViewModel: loadMore error: $e');
@@ -110,11 +116,35 @@ class HistoryViewModel extends ChangeNotifier {
     );
   }
 
+  int _compareClosedTabs(ClosedTab a, ClosedTab b) {
+    final byClosedAt = b.closedAt.compareTo(a.closedAt);
+    if (byClosedAt != 0) return byClosedAt;
+
+    return b.id.compareTo(a.id);
+  }
+
+  int _compareOpenTabs(BarTab a, BarTab b) {
+    final byOpenedAt = b.openedAt.compareTo(a.openedAt);
+    if (byOpenedAt != 0) return byOpenedAt;
+
+    return b.id.compareTo(a.id);
+  }
+
   void search(String query) {
     _searchQuery = query;
     notifyListeners();
   }
 
+  bool _matchesCustomer(String customerName) {
+    if (_selectedCustomer != null && customerName != _selectedCustomer) {
+      return false;
+    }
+
+    if (_searchQuery.isEmpty) return true;
+
+    return customerName.toLowerCase().contains(_searchQuery.toLowerCase());
+  }
+
   Future<void> filterByCustomer(String? customerName) async {
     _selectedCustomer = customerName;
     _searchQuery = '';
@@ -123,4 +153,4 @@ class HistoryViewModel extends ChangeNotifier {
 
     await load();
   }
-}
+}

lib/views/history_screen_view.dart

@@ -1,8 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:kooltab2/views/widgets/closed_tab_card.dart';
+import 'package:kooltab2/views/widgets/open_tab_history_card.dart';
 import 'package:provider/provider.dart';
 
 import '../app/router.dart';
+import '../models/bar_tab.dart';
+import '../models/closed_tab.dart';
 import '../utils/navigation.dart';
 import '../viewmodels/history_view_model.dart';
 import '../l10n/app_localizations.dart';
@@ -134,33 +137,15 @@ class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
                 ),
               ),
               Expanded(
-                child: viewModel.closedTabs.isEmpty
+                child:
+                    viewModel.openTabs.isEmpty && viewModel.closedTabs.isEmpty
                     ? _EmptyState()
-                    : ListView.separated(
-                        controller: _scrollController,
-                        padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
-                        itemCount:
-                            viewModel.closedTabs.length +
-                            (viewModel.hasMore || viewModel.isLoadingMore
-                                ? 1
-                                : 0),
-                        separatorBuilder: (_, _) => const SizedBox(height: 10),
-                        itemBuilder: (context, index) {
-                          if (index == viewModel.closedTabs.length) {
-                            return const Padding(
-                              padding: EdgeInsets.symmetric(vertical: 24),
-                              child: Center(
-                                child: CircularProgressIndicator(
-                                  strokeWidth: 2.5,
-                                ),
-                              ),
-                            );
-                          }
-
-                          final closedTab = viewModel.closedTabs[index];
-
-                          return ClosedTabCard(closedTab: closedTab);
-                        },
+                    : _HistoryList(
+                        openTabs: viewModel.openTabs,
+                        closedTabs: viewModel.closedTabs,
+                        hasMore: viewModel.hasMore,
+                        isLoadingMore: viewModel.isLoadingMore,
+                        scrollController: _scrollController,
                       ),
               ),
             ],
@@ -171,6 +156,85 @@ class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
   }
 }
 
+class _HistoryList extends StatelessWidget {
+  final List<BarTab> openTabs;
+  final List<ClosedTab> closedTabs;
+  final bool hasMore;
+  final bool isLoadingMore;
+  final ScrollController scrollController;
+
+  const _HistoryList({
+    required this.openTabs,
+    required this.closedTabs,
+    required this.hasMore,
+    required this.isLoadingMore,
+    required this.scrollController,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+    final openSectionCount = openTabs.isEmpty ? 0 : openTabs.length + 1;
+    final closedSectionCount = closedTabs.isEmpty ? 0 : closedTabs.length + 1;
+    final loadingCount = hasMore || isLoadingMore ? 1 : 0;
+
+    return ListView.separated(
+      controller: scrollController,
+      padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
+      itemCount: openSectionCount + closedSectionCount + loadingCount,
+      separatorBuilder: (_, _) => const SizedBox(height: 10),
+      itemBuilder: (context, index) {
+        if (openTabs.isNotEmpty) {
+          if (index == 0) {
+            return _HistorySectionHeader(title: l10n.openTabs);
+          }
+
+          if (index <= openTabs.length) {
+            return OpenTabHistoryCard(tab: openTabs[index - 1]);
+          }
+        }
+
+        final closedIndex = index - openSectionCount;
+        if (closedTabs.isNotEmpty) {
+          if (closedIndex == 0) {
+            return _HistorySectionHeader(title: l10n.closedTabs);
+          }
+
+          if (closedIndex <= closedTabs.length) {
+            return ClosedTabCard(closedTab: closedTabs[closedIndex - 1]);
+          }
+        }
+
+        return const Padding(
+          padding: EdgeInsets.symmetric(vertical: 24),
+          child: Center(child: CircularProgressIndicator(strokeWidth: 2.5)),
+        );
+      },
+    );
+  }
+}
+
+class _HistorySectionHeader extends StatelessWidget {
+  final String title;
+
+  const _HistorySectionHeader({required this.title});
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(top: 8, bottom: 2),
+      child: Text(
+        title.toUpperCase(),
+        style: Theme.of(context).textTheme.bodySmall?.copyWith(
+          fontWeight: FontWeight.w700,
+          letterSpacing: 0.7,
+          color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.5),
+        ),
+      ),
+    );
+  }
+}
+
 class _CustomerDropdown extends StatelessWidget {
   static const _allSentinel = r'$__all__$';
 
@@ -194,95 +258,134 @@ class _CustomerDropdown extends StatelessWidget {
       onSelected: (value) {
         onSelected(value == _allSentinel ? null : value);
       },
-      offset: const Offset(0, 44),
+      tooltip: l10n.customer,
+      padding: EdgeInsets.zero,
+      offset: const Offset(0, 8),
       shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
       color: Theme.of(context).cardTheme.color ?? scheme.surface,
       itemBuilder: (context) => [
         PopupMenuItem<String>(
           value: _allSentinel,
-          child: Row(
-            children: [
-              Icon(
-                isFiltered ? Icons.people_outline : Icons.people_rounded,
-                size: 18,
-                color: isFiltered ? null : scheme.primary,
-              ),
-              const SizedBox(width: 10),
-              Text(
-                l10n.allCustomers,
-                style: TextStyle(
-                  fontWeight: isFiltered ? FontWeight.w400 : FontWeight.w700,
-                  color: isFiltered ? null : scheme.primary,
-                ),
-              ),
-            ],
+          height: 50,
+          child: _CustomerMenuRow(
+            icon: Icons.people_outline_rounded,
+            label: l10n.allCustomers,
+            selected: !isFiltered,
           ),
         ),
         if (customerNames.isNotEmpty) const PopupMenuDivider(height: 1),
         ...customerNames.map(
           (name) => PopupMenuItem<String>(
             value: name,
-            child: Row(
-              children: [
-                Icon(
-                  name == selectedCustomer
-                      ? Icons.person_rounded
-                      : Icons.person_outline_rounded,
-                  size: 18,
-                ),
-                const SizedBox(width: 10),
-                Expanded(child: Text(name, overflow: TextOverflow.ellipsis)),
-              ],
+            height: 50,
+            child: _CustomerMenuRow(
+              icon: name == selectedCustomer
+                  ? Icons.person_rounded
+                  : Icons.person_outline_rounded,
+              label: name,
+              selected: name == selectedCustomer,
             ),
           ),
         ),
       ],
-      child: Container(
-        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 14),
-        decoration: BoxDecoration(
-          borderRadius: BorderRadius.circular(14),
-          border: Border.all(color: scheme.onSurface.withValues(alpha: 0.12)),
-          color: isFiltered ? scheme.primary.withValues(alpha: 0.08) : null,
-        ),
-        child: Row(
-          mainAxisSize: MainAxisSize.min,
-          children: [
-            Icon(
-              Icons.person_rounded,
-              size: 18,
+      child: ConstrainedBox(
+        constraints: const BoxConstraints(minWidth: 144, maxWidth: 220),
+        child: Container(
+          padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
+          decoration: BoxDecoration(
+            borderRadius: BorderRadius.circular(12),
+            border: Border.all(
               color: isFiltered
-                  ? scheme.primary
-                  : scheme.onSurface.withValues(alpha: 0.5),
+                  ? scheme.primary.withValues(alpha: 0.35)
+                  : scheme.onSurface.withValues(alpha: 0.12),
             ),
-            const SizedBox(width: 6),
-            Flexible(
-              child: Text(
-                selectedCustomer ?? l10n.customer,
-                overflow: TextOverflow.ellipsis,
-                style: TextStyle(
-                  fontWeight: FontWeight.w600,
-                  fontSize: 13,
-                  color: isFiltered
-                      ? scheme.primary
-                      : scheme.onSurface.withValues(alpha: 0.5),
+            color: isFiltered ? scheme.primary.withValues(alpha: 0.08) : null,
+          ),
+          child: Row(
+            children: [
+              Icon(
+                isFiltered
+                    ? Icons.filter_alt_rounded
+                    : Icons.people_outline_rounded,
+                size: 18,
+                color: isFiltered
+                    ? scheme.primary
+                    : scheme.onSurface.withValues(alpha: 0.5),
+              ),
+              const SizedBox(width: 8),
+              Expanded(
+                child: Text(
+                  selectedCustomer ?? l10n.allCustomers,
+                  overflow: TextOverflow.ellipsis,
+                  style: TextStyle(
+                    fontWeight: FontWeight.w600,
+                    fontSize: 13,
+                    color: isFiltered
+                        ? scheme.primary
+                        : scheme.onSurface.withValues(alpha: 0.65),
+                  ),
                 ),
               ),
-            ),
-            const SizedBox(width: 4),
-            Icon(
-              Icons.arrow_drop_down_rounded,
-              size: 18,
-              color: isFiltered
-                  ? scheme.primary
-                  : scheme.onSurface.withValues(alpha: 0.5),
-            ),
-          ],
+              const SizedBox(width: 4),
+              Icon(
+                Icons.keyboard_arrow_down_rounded,
+                size: 18,
+                color: isFiltered
+                    ? scheme.primary
+                    : scheme.onSurface.withValues(alpha: 0.5),
+              ),
+            ],
+          ),
         ),
       ),
     );
   }
 }
 
+class _CustomerMenuRow extends StatelessWidget {
+  final IconData icon;
+  final String label;
+  final bool selected;
+
+  const _CustomerMenuRow({
+    required this.icon,
+    required this.label,
+    required this.selected,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final scheme = Theme.of(context).colorScheme;
+
+    return Row(
+      children: [
+        Icon(
+          icon,
+          size: 18,
+          color: selected
+              ? scheme.primary
+              : scheme.onSurface.withValues(alpha: 0.65),
+        ),
+        const SizedBox(width: 10),
+        Expanded(
+          child: Text(
+            label,
+            overflow: TextOverflow.ellipsis,
+            style: TextStyle(
+              fontWeight: selected ? FontWeight.w700 : FontWeight.w400,
+              color: selected ? scheme.primary : scheme.onSurface,
+            ),
+          ),
+        ),
+        if (selected) ...[
+          const SizedBox(width: 10),
+          Icon(Icons.check_rounded, size: 18, color: scheme.primary),
+        ],
+      ],
+    );
+  }
+}
+
 class _EmptyState extends StatelessWidget {
   @override
   Widget build(BuildContext context) {

lib/views/widgets/closed_tab_card.dart

@@ -5,6 +5,7 @@ import 'package:kooltab2/models/closed_tab_item.dart';
 import 'package:kooltab2/models/payment_method.dart';
 
 import '../../l10n/app_localizations.dart';
+import '../../utils/history_grouping.dart';
 
 class ClosedTabCard extends StatefulWidget {
   final ClosedTab closedTab;
@@ -31,6 +32,10 @@ class _ClosedTabCardState extends State<ClosedTabCard> {
     final l10n = AppLocalizations.of(context);
     final locale = Localizations.localeOf(context).toLanguageTag();
     final dateFormat = DateFormat.yMMMd(locale).add_jm();
+    final dayGroups = groupClosedTabItemsByDay(
+      closedTab.items,
+      fallbackDate: closedTab.closedAt,
+    );
     final scheme = Theme.of(context).colorScheme;
 
     return Container(
@@ -40,17 +45,16 @@ class _ClosedTabCardState extends State<ClosedTabCard> {
         border: Border.all(color: scheme.onSurface.withValues(alpha: 0.06)),
       ),
       clipBehavior: Clip.antiAlias,
-      child: Material(
-        color: Colors.transparent,
-        child: InkWell(
-          onTap: () => setState(() => _expanded = !_expanded),
-          enableFeedback: true,
-          splashFactory: NoSplash.splashFactory,
-
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              Padding(
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Material(
+            color: Colors.transparent,
+            child: InkWell(
+              onTap: () => setState(() => _expanded = !_expanded),
+              enableFeedback: true,
+              splashFactory: NoSplash.splashFactory,
+              child: Padding(
                 padding: const EdgeInsets.symmetric(
                   horizontal: 16,
                   vertical: 14,
@@ -137,27 +141,163 @@ class _ClosedTabCardState extends State<ClosedTabCard> {
                   ],
                 ),
               ),
-              AnimatedCrossFade(
-                duration: const Duration(milliseconds: 150),
-                crossFadeState: _expanded
-                    ? CrossFadeState.showFirst
-                    : CrossFadeState.showSecond,
-                firstChild: Padding(
-                  padding: const EdgeInsets.fromLTRB(16, 0, 16, 14),
-                  child: Column(
+            ),
+          ),
+          AnimatedCrossFade(
+            duration: const Duration(milliseconds: 150),
+            crossFadeState: _expanded
+                ? CrossFadeState.showFirst
+                : CrossFadeState.showSecond,
+            firstChild: Padding(
+              padding: const EdgeInsets.fromLTRB(16, 0, 16, 14),
+              child: Column(
+                children: [
+                  const Divider(height: 1),
+                  const SizedBox(height: 8),
+                  for (var index = 0; index < dayGroups.length; index++)
+                    _ClosedTabDayDropdown(
+                      key: ValueKey(
+                        '${dayGroups[index].items.first.closedTabId}-'
+                        '${dayGroups[index].day.toIso8601String()}',
+                      ),
+                      group: dayGroups[index],
+                      fallbackDate: closedTab.closedAt,
+                      initiallyExpanded: index == 0,
+                    ),
+                ],
+              ),
+            ),
+            secondChild: const SizedBox(width: double.infinity),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class _ClosedTabDayDropdown extends StatefulWidget {
+  final ClosedTabItemDayGroup group;
+  final DateTime fallbackDate;
+  final bool initiallyExpanded;
+
+  const _ClosedTabDayDropdown({
+    super.key,
+    required this.group,
+    required this.fallbackDate,
+    required this.initiallyExpanded,
+  });
+
+  @override
+  State<_ClosedTabDayDropdown> createState() => _ClosedTabDayDropdownState();
+}
+
+class _ClosedTabDayDropdownState extends State<_ClosedTabDayDropdown> {
+  late bool _expanded = widget.initiallyExpanded;
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+    final locale = Localizations.localeOf(context).toLanguageTag();
+    final dayFormat = DateFormat.yMMMMd(locale);
+    final scheme = Theme.of(context).colorScheme;
+
+    return Padding(
+      padding: const EdgeInsets.only(top: 8),
+      child: AnimatedContainer(
+        duration: const Duration(milliseconds: 160),
+        decoration: BoxDecoration(
+          color: _expanded
+              ? scheme.primary.withValues(alpha: 0.08)
+              : scheme.onSurface.withValues(alpha: 0.035),
+          borderRadius: BorderRadius.circular(12),
+          border: Border.all(
+            color: _expanded
+                ? scheme.primary.withValues(alpha: 0.28)
+                : scheme.onSurface.withValues(alpha: 0.08),
+          ),
+        ),
+        clipBehavior: Clip.antiAlias,
+        child: Column(
+          children: [
+            Material(
+              color: Colors.transparent,
+              child: InkWell(
+                onTap: () => setState(() => _expanded = !_expanded),
+                child: Padding(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 12,
+                    vertical: 10,
+                  ),
+                  child: Row(
                     children: [
-                      const Divider(height: 1),
-                      const SizedBox(height: 8),
-                      ...closedTab.items.map(
-                        (item) => _ClosedTabItemRow(item: item),
+                      Container(
+                        width: 30,
+                        height: 30,
+                        decoration: BoxDecoration(
+                          color: scheme.primary.withValues(alpha: 0.14),
+                          borderRadius: BorderRadius.circular(9),
+                        ),
+                        child: Icon(
+                          Icons.calendar_today_rounded,
+                          size: 16,
+                          color: scheme.primary,
+                        ),
+                      ),
+                      const SizedBox(width: 10),
+                      Expanded(
+                        child: Column(
+                          crossAxisAlignment: CrossAxisAlignment.start,
+                          children: [
+                            Text(
+                              dayFormat.format(widget.group.day),
+                              style: const TextStyle(
+                                fontWeight: FontWeight.w700,
+                              ),
+                            ),
+                            Text(
+                              l10n.tabItemCount(widget.group.itemCount),
+                              style: Theme.of(context).textTheme.bodySmall,
+                            ),
+                          ],
+                        ),
+                      ),
+                      Icon(
+                        _expanded
+                            ? Icons.keyboard_arrow_up_rounded
+                            : Icons.keyboard_arrow_down_rounded,
+                        color: _expanded
+                            ? scheme.primary
+                            : scheme.onSurface.withValues(alpha: 0.5),
                       ),
                     ],
                   ),
                 ),
-                secondChild: const SizedBox(width: double.infinity),
               ),
-            ],
-          ),
+            ),
+            AnimatedSize(
+              duration: const Duration(milliseconds: 160),
+              curve: Curves.easeOut,
+              child: _expanded
+                  ? Padding(
+                      padding: const EdgeInsets.fromLTRB(12, 0, 12, 8),
+                      child: Column(
+                        children: [
+                          Divider(
+                            height: 1,
+                            color: scheme.primary.withValues(alpha: 0.18),
+                          ),
+                          for (final item in widget.group.items)
+                            _ClosedTabItemRow(
+                              item: item,
+                              purchasedAt:
+                                  item.purchasedAt ?? widget.fallbackDate,
+                            ),
+                        ],
+                      ),
+                    )
+                  : const SizedBox.shrink(),
+            ),
+          ],
         ),
       ),
     );
@@ -166,12 +306,15 @@ class _ClosedTabCardState extends State<ClosedTabCard> {
 
 class _ClosedTabItemRow extends StatelessWidget {
   final ClosedTabItem item;
+  final DateTime purchasedAt;
 
-  const _ClosedTabItemRow({required this.item});
+  const _ClosedTabItemRow({required this.item, required this.purchasedAt});
 
   @override
   Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
     final locale = Localizations.localeOf(context).toLanguageTag();
+    final timeFormat = DateFormat.jm(locale);
     final unitPrice = NumberFormat.simpleCurrency(
       locale: locale,
     ).format(item.unitPriceInCents / 100);
@@ -185,32 +328,57 @@ class _ClosedTabItemRow extends StatelessWidget {
       child: Row(
         children: [
           Expanded(
-            child: Text(
-              item.productName,
-              maxLines: 1,
-              overflow: TextOverflow.ellipsis,
-              style: TextStyle(
-                fontWeight: FontWeight.w600,
-                color: scheme.onSurface,
-              ),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  item.productName,
+                  maxLines: 1,
+                  overflow: TextOverflow.ellipsis,
+                  style: TextStyle(
+                    fontWeight: FontWeight.w600,
+                    color: item.isRemoved
+                        ? scheme.onSurface.withValues(alpha: 0.5)
+                        : scheme.onSurface,
+                    decoration: item.isRemoved
+                        ? TextDecoration.lineThrough
+                        : null,
+                  ),
+                ),
+                Text(
+                  timeFormat.format(purchasedAt),
+                  style: Theme.of(context).textTheme.bodySmall,
+                ),
+              ],
             ),
           ),
-          Text(
-            '${item.quantity} × $unitPrice',
-            style: Theme.of(context).textTheme.bodySmall,
-          ),
-          const SizedBox(width: 12),
-          SizedBox(
-            width: 64,
-            child: Text(
-              lineTotal,
-              textAlign: TextAlign.end,
+          if (item.isRemoved)
+            Text(
+              l10n.removed,
               style: TextStyle(
+                color: scheme.error,
+                fontSize: 12,
                 fontWeight: FontWeight.w700,
-                color: scheme.onSurface,
+              ),
+            )
+          else ...[
+            Text(
+              '${item.quantity} × $unitPrice',
+              style: Theme.of(context).textTheme.bodySmall,
+            ),
+            const SizedBox(width: 12),
+            SizedBox(
+              width: 64,
+              child: Text(
+                lineTotal,
+                textAlign: TextAlign.end,
+                style: TextStyle(
+                  fontWeight: FontWeight.w700,
+                  color: scheme.onSurface,
+                ),
               ),
             ),
-          ),
+          ],
         ],
       ),
     );

lib/views/widgets/open_tab_history_card.dart

@@ -0,0 +1,256 @@
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+
+import '../../l10n/app_localizations.dart';
+import '../../models/bar_tab.dart';
+import '../../models/tab_item_purchase.dart';
+
+class OpenTabHistoryCard extends StatefulWidget {
+  final BarTab tab;
+
+  const OpenTabHistoryCard({super.key, required this.tab});
+
+  @override
+  State<OpenTabHistoryCard> createState() => _OpenTabHistoryCardState();
+}
+
+class _OpenTabHistoryCardState extends State<OpenTabHistoryCard> {
+  bool _expanded = false;
+
+  List<_OpenPurchase> _purchases(BarTab tab) {
+    final purchases = <_OpenPurchase>[];
+
+    for (final item in tab.items) {
+      final records = item.purchases.isEmpty
+          ? List<TabItemPurchase>.generate(
+              item.quantity,
+              (index) => TabItemPurchase(
+                id: '${item.id}-$index',
+                tabItemId: item.id,
+                purchasedAt: tab.openedAt,
+              ),
+            )
+          : item.purchases;
+
+      purchases.addAll(
+        records.map(
+          (purchase) => _OpenPurchase(
+            productName: item.productName,
+            unitPriceInCents: item.unitPriceInCents,
+            purchasedAt: purchase.purchasedAt,
+            isRemoved: purchase.isRemoved,
+          ),
+        ),
+      );
+    }
+
+    purchases.sort((a, b) {
+      final byTime = b.purchasedAt.compareTo(a.purchasedAt);
+      if (byTime != 0) return byTime;
+
+      return b.productName.compareTo(a.productName);
+    });
+    return purchases;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final tab = widget.tab;
+    final l10n = AppLocalizations.of(context);
+    final locale = Localizations.localeOf(context).toLanguageTag();
+    final dateFormat = DateFormat.yMMMd(locale).add_jm();
+    final scheme = Theme.of(context).colorScheme;
+
+    return Container(
+      decoration: BoxDecoration(
+        color: scheme.primary.withValues(alpha: 0.06),
+        borderRadius: BorderRadius.circular(14),
+        border: Border.all(color: scheme.primary.withValues(alpha: 0.2)),
+      ),
+      clipBehavior: Clip.antiAlias,
+      child: Material(
+        color: Colors.transparent,
+        child: InkWell(
+          onTap: () => setState(() => _expanded = !_expanded),
+          enableFeedback: true,
+          splashFactory: NoSplash.splashFactory,
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Padding(
+                padding: const EdgeInsets.symmetric(
+                  horizontal: 16,
+                  vertical: 14,
+                ),
+                child: Row(
+                  children: [
+                    Expanded(
+                      child: Column(
+                        crossAxisAlignment: CrossAxisAlignment.start,
+                        children: [
+                          Row(
+                            children: [
+                              Expanded(
+                                child: Text(
+                                  tab.customerName,
+                                  maxLines: 1,
+                                  overflow: TextOverflow.ellipsis,
+                                  style: TextStyle(
+                                    fontSize: 16,
+                                    fontWeight: FontWeight.w800,
+                                    color: scheme.onSurface,
+                                  ),
+                                ),
+                              ),
+                              const SizedBox(width: 8),
+                              Container(
+                                padding: const EdgeInsets.symmetric(
+                                  horizontal: 8,
+                                  vertical: 3,
+                                ),
+                                decoration: BoxDecoration(
+                                  color: scheme.primary.withValues(alpha: 0.12),
+                                  borderRadius: BorderRadius.circular(999),
+                                ),
+                                child: Text(
+                                  l10n.openTabs,
+                                  style: TextStyle(
+                                    fontSize: 11,
+                                    fontWeight: FontWeight.w700,
+                                    color: scheme.primary,
+                                  ),
+                                ),
+                              ),
+                            ],
+                          ),
+                          const SizedBox(height: 2),
+                          Text(
+                            '${dateFormat.format(tab.openedAt)} · ${l10n.tabItemCount(tab.itemCount)}',
+                            style: Theme.of(context).textTheme.bodySmall,
+                          ),
+                        ],
+                      ),
+                    ),
+                    const SizedBox(width: 8),
+                    Text(
+                      tab.formattedTotal,
+                      style: TextStyle(
+                        fontSize: 16,
+                        fontWeight: FontWeight.w800,
+                        color: scheme.onSurface,
+                      ),
+                    ),
+                    const SizedBox(width: 4),
+                    Icon(
+                      _expanded
+                          ? Icons.expand_less_rounded
+                          : Icons.expand_more_rounded,
+                      color: scheme.onSurface.withValues(alpha: 0.5),
+                    ),
+                  ],
+                ),
+              ),
+              AnimatedCrossFade(
+                duration: const Duration(milliseconds: 150),
+                crossFadeState: _expanded
+                    ? CrossFadeState.showFirst
+                    : CrossFadeState.showSecond,
+                firstChild: Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 0, 16, 14),
+                  child: Column(
+                    children: [
+                      const Divider(height: 1),
+                      const SizedBox(height: 8),
+                      ..._purchases(
+                        tab,
+                      ).map((purchase) => _OpenPurchaseRow(purchase: purchase)),
+                    ],
+                  ),
+                ),
+                secondChild: const SizedBox(width: double.infinity),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _OpenPurchase {
+  final String productName;
+  final int unitPriceInCents;
+  final DateTime purchasedAt;
+  final bool isRemoved;
+
+  const _OpenPurchase({
+    required this.productName,
+    required this.unitPriceInCents,
+    required this.purchasedAt,
+    required this.isRemoved,
+  });
+}
+
+class _OpenPurchaseRow extends StatelessWidget {
+  final _OpenPurchase purchase;
+
+  const _OpenPurchaseRow({required this.purchase});
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = AppLocalizations.of(context);
+    final locale = Localizations.localeOf(context).toLanguageTag();
+    final dateFormat = DateFormat.yMMMd(locale).add_jm();
+    final unitPrice = NumberFormat.simpleCurrency(
+      locale: locale,
+    ).format(purchase.unitPriceInCents / 100);
+    final scheme = Theme.of(context).colorScheme;
+
+    return Padding(
+      padding: const EdgeInsets.symmetric(vertical: 6),
+      child: Row(
+        children: [
+          Expanded(
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: [
+                Text(
+                  purchase.productName,
+                  maxLines: 1,
+                  overflow: TextOverflow.ellipsis,
+                  style: TextStyle(
+                    fontWeight: FontWeight.w600,
+                    color: purchase.isRemoved
+                        ? scheme.onSurface.withValues(alpha: 0.5)
+                        : scheme.onSurface,
+                    decoration: purchase.isRemoved
+                        ? TextDecoration.lineThrough
+                        : null,
+                  ),
+                ),
+                Text(
+                  dateFormat.format(purchase.purchasedAt),
+                  style: Theme.of(context).textTheme.bodySmall,
+                ),
+              ],
+            ),
+          ),
+          if (purchase.isRemoved)
+            Text(
+              l10n.removed,
+              style: TextStyle(
+                color: scheme.error,
+                fontSize: 12,
+                fontWeight: FontWeight.w700,
+              ),
+            )
+          else
+            Text(
+              '1 × $unitPrice',
+              style: Theme.of(context).textTheme.bodySmall,
+            ),
+        ],
+      ),
+    );
+  }
+}

test/bar_tab_service_test.dart

@@ -196,6 +196,29 @@ void main() {
         expect(updatedTab.items.first.quantity, 3);
       });
 
+      test('records each addition as a separate purchase event', () async {
+        final tab = await service.createTab(customerName: 'John');
+        final product = createTestProduct();
+
+        await service.addProductToTab(tabId: tab.id, product: product);
+        await service.addProductToTab(tabId: tab.id, product: product);
+
+        final barTab = (await service.getOpenTabs()).first;
+        final historyTab = (await service.getOpenTabs(
+          includeRemoved: true,
+        )).first;
+
+        expect(barTab.items.first.quantity, 2);
+        expect(barTab.items.first.purchases, hasLength(2));
+        expect(historyTab.items.first.purchases, hasLength(2));
+        expect(
+          historyTab.items.first.purchases.every(
+            (purchase) => !purchase.isRemoved,
+          ),
+          isTrue,
+        );
+      });
+
       test('adding product calculates correct line total', () async {
         final tab = await service.createTab(customerName: 'John');
         final product = createTestProduct(priceInCents: 450);
@@ -251,7 +274,7 @@ void main() {
         expect(updatedTab!.items.first.quantity, 5);
       });
 
-      test('deletes item when the delta removes all quantity', () async {
+      test('hides item when the delta removes all quantity', () async {
         final tab = await service.createTab(customerName: 'John');
         final product = createTestProduct();
         await service.addProductToTab(tabId: tab.id, product: product);
@@ -282,6 +305,32 @@ void main() {
         expect(updatedProduct.stockQuantity, 100);
       });
 
+      test('keeps a removed purchase in the history audit trail', () async {
+        final tab = await service.createTab(customerName: 'John');
+        final product = createTestProduct();
+        await service.addProductToTab(tabId: tab.id, product: product);
+        await service.addProductToTab(tabId: tab.id, product: product);
+
+        final tabItemId = (await service.getTabById(tab.id))!.items.first.id;
+
+        await service.adjustTabItemQuantity(tabItemId: tabItemId, delta: -1);
+
+        final historyTab = (await service.getOpenTabs(
+          includeRemoved: true,
+        )).first;
+        final item = historyTab.items.first;
+
+        expect(item.quantity, 1);
+        expect(
+          item.purchases.where((purchase) => purchase.isRemoved),
+          hasLength(1),
+        );
+        expect(
+          item.purchases.where((purchase) => !purchase.isRemoved),
+          hasLength(1),
+        );
+      });
+
       test(
         'applies concurrent deltas without losing stock consistency',
         () async {
@@ -320,10 +369,38 @@ void main() {
         final closedTabs = await service.getClosedTabs();
         expect(closedTabs.length, 1);
         expect(closedTabs.first.customerName, 'John');
-        expect(closedTabs.first.items.length, 1);
-        expect(closedTabs.first.items.first.quantity, 2);
+        expect(closedTabs.first.items.length, 2);
+        expect(
+          closedTabs.first.items.every((item) => item.quantity == 1),
+          true,
+        );
+        expect(
+          closedTabs.first.items.every((item) => item.purchasedAt != null),
+          true,
+        );
       });
 
+      test(
+        'keeps removed purchases visible but excludes them from totals',
+        () async {
+          final tab = await service.createTab(customerName: 'John');
+          final product = createTestProduct();
+          await service.addProductToTab(tabId: tab.id, product: product);
+          await service.addProductToTab(tabId: tab.id, product: product);
+
+          final tabItemId = (await service.getTabById(tab.id))!.items.first.id;
+          await service.adjustTabItemQuantity(tabItemId: tabItemId, delta: -1);
+          await service.closeTab(tab.id);
+
+          final closedTab = (await service.getClosedTabs()).first;
+
+          expect(closedTab.items, hasLength(2));
+          expect(closedTab.items.where((item) => item.isRemoved), hasLength(1));
+          expect(closedTab.itemCount, 1);
+          expect(closedTab.totalInCents, 400);
+        },
+      );
+
       test('clears tab items after closing', () async {
         final tab = await service.createTab(customerName: 'John');
         final product = createTestProduct();

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 '),
+    );
+  });
+}

test/history_grouping_test.dart

@@ -0,0 +1,35 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:kooltab2/models/closed_tab_item.dart';
+import 'package:kooltab2/utils/history_grouping.dart';
+
+void main() {
+  test('groups items by purchase day with newest day first', () {
+    final items = [
+      _closedItem('older', DateTime(2026, 8, 1, 22)),
+      _closedItem('newer-b', DateTime(2026, 8, 3, 18)),
+      _closedItem('newer-a', DateTime(2026, 8, 3, 10)),
+    ];
+
+    final groups = groupClosedTabItemsByDay(
+      items,
+      fallbackDate: DateTime(2026, 8, 4),
+    );
+
+    expect(groups, hasLength(2));
+    expect(groups.first.day, DateTime(2026, 8, 3));
+    expect(groups.first.items.map((item) => item.id), ['newer-b', 'newer-a']);
+    expect(groups.last.day, DateTime(2026, 8, 1));
+  });
+}
+
+ClosedTabItem _closedItem(String id, DateTime purchasedAt) {
+  return ClosedTabItem(
+    id: id,
+    closedTabId: 'closed-tab',
+    productId: 'product-$id',
+    productName: id,
+    quantity: 1,
+    unitPriceInCents: 100,
+    purchasedAt: purchasedAt,
+  );
+}

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 [],
+);