feat: add equality operators, make history screen paginated, random performance updates

lib/app/router.dart

@@ -5,6 +5,7 @@ import 'package:kooltab2/views/settings_view.dart';
 import '../viewmodels/pin_lock_view_model.dart';
 import '../views/bar_screen_view.dart';
 import '../views/dev_menu_view.dart';
+import '../views/error_screen_view.dart';
 import '../views/history_screen_view.dart';
 import '../views/pin_lock_view.dart';
 import '../views/product_form_view.dart';
@@ -80,6 +81,10 @@ GoRouter createAppRouter(PinLockViewModel pinLockViewModel) {
         path: '/dev',
         builder: (context, state) => const DevMenuView(),
       ),
+      GoRoute(
+        path: '/error',
+        builder: (context, state) => const ErrorScreenView(),
+      ),
     ],
   );
 }

lib/database/app_database.dart

@@ -126,7 +126,7 @@ class AppDatabase extends _$AppDatabase {
   AppDatabase([QueryExecutor? executor]) : super(executor ?? _openConnection());
 
   @override
-  int get schemaVersion => 4;
+  int get schemaVersion => 5;
 
   @override
   MigrationStrategy get migration {

lib/models/bar_tab.dart

@@ -30,4 +30,35 @@ class BarTab {
   }
 
   bool get isOpen => status == 'open';
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is BarTab &&
+          id == other.id &&
+          customerName == other.customerName &&
+          status == other.status &&
+          openedAt == other.openedAt &&
+          closedAt == other.closedAt &&
+          _listEquals(items, other.items);
+
+  @override
+  int get hashCode => Object.hash(
+        id,
+        customerName,
+        status,
+        openedAt,
+        closedAt,
+        Object.hashAll(items),
+      );
+}
+
+bool _listEquals<T>(List<T>? a, List<T>? b) {
+  if (identical(a, b)) return true;
+  if (a == null || b == null) return a == b;
+  if (a.length != b.length) return false;
+  for (int i = 0; i < a.length; i++) {
+    if (a[i] != b[i]) return false;
+  }
+  return true;
 }

lib/models/closed_tab.dart

@@ -24,4 +24,33 @@ class ClosedTab {
 
   String get formattedTotal =>
       NumberFormat.simpleCurrency().format(totalInCents / 100);
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is ClosedTab &&
+          id == other.id &&
+          originalTabId == other.originalTabId &&
+          customerName == other.customerName &&
+          closedAt == other.closedAt &&
+          _listEquals(items, other.items);
+
+  @override
+  int get hashCode => Object.hash(
+        id,
+        originalTabId,
+        customerName,
+        closedAt,
+        Object.hashAll(items),
+      );
+}
+
+bool _listEquals<T>(List<T>? a, List<T>? b) {
+  if (identical(a, b)) return true;
+  if (a == null || b == null) return a == b;
+  if (a.length != b.length) return false;
+  for (int i = 0; i < a.length; i++) {
+    if (a[i] != b[i]) return false;
+  }
+  return true;
 }

lib/models/closed_tab_item.dart

@@ -16,4 +16,25 @@ class ClosedTabItem {
   });
 
   int get lineTotalInCents => quantity * unitPriceInCents;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is ClosedTabItem &&
+          id == other.id &&
+          closedTabId == other.closedTabId &&
+          productId == other.productId &&
+          productName == other.productName &&
+          quantity == other.quantity &&
+          unitPriceInCents == other.unitPriceInCents;
+
+  @override
+  int get hashCode => Object.hash(
+        id,
+        closedTabId,
+        productId,
+        productName,
+        quantity,
+        unitPriceInCents,
+      );
 }

lib/models/product.dart

@@ -48,4 +48,29 @@ class Product {
       active: active ?? this.active,
     );
   }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is Product &&
+          id == other.id &&
+          name == other.name &&
+          category == other.category &&
+          stockQuantity == other.stockQuantity &&
+          lowStockThreshold == other.lowStockThreshold &&
+          priceInCents == other.priceInCents &&
+          imagePath == other.imagePath &&
+          active == other.active;
+
+  @override
+  int get hashCode => Object.hash(
+        id,
+        name,
+        category,
+        stockQuantity,
+        lowStockThreshold,
+        priceInCents,
+        imagePath,
+        active,
+      );
 }

lib/models/settings.dart

@@ -17,4 +17,14 @@ class AppSettings {
     pinRequired: false,
     themeMode: AppThemeMode.system,
   );
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is AppSettings &&
+          pinRequired == other.pinRequired &&
+          themeMode == other.themeMode;
+
+  @override
+  int get hashCode => Object.hash(pinRequired, themeMode);
 }

lib/models/tab_item.dart

@@ -24,4 +24,25 @@ class TabItem {
   String get formattedUnitPrice {
     return '€${(unitPriceInCents / 100).toStringAsFixed(2)}';
   }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is TabItem &&
+          id == other.id &&
+          tabId == other.tabId &&
+          productId == other.productId &&
+          productName == other.productName &&
+          quantity == other.quantity &&
+          unitPriceInCents == other.unitPriceInCents;
+
+  @override
+  int get hashCode => Object.hash(
+        id,
+        tabId,
+        productId,
+        productName,
+        quantity,
+        unitPriceInCents,
+      );
 }

lib/services/bar_tab_service.dart

@@ -18,11 +18,13 @@ abstract class BarTabService {
   Future<void> addProductToTab({
     required String tabId,
     required Product product,
+    Future<void> Function()? stockAdjustment,
   });
 
   Future<void> updateTabItemQuantity({
     required String tabItemId,
     required int quantity,
+    Future<void> Function()? stockAdjustment,
   });
 
   /// Archives the tab's current items into history and clears them.
@@ -30,6 +32,16 @@ abstract class BarTabService {
   Future<void> closeTab(String tabId);
 
   Future<List<ClosedTab>> getClosedTabs();
+
+  Future<List<ClosedTab>> getClosedTabsPaginated({
+    int limit = 20,
+    int offset = 0,
+    String? customerName,
+  });
+
+  Future<int> getClosedTabCount({String? customerName});
+
+  Future<List<String>> getDistinctCustomerNames();
 }
 
 class DriftBarTabService implements BarTabService {
@@ -144,6 +156,7 @@ class DriftBarTabService implements BarTabService {
   Future<void> addProductToTab({
     required String tabId,
     required Product product,
+    Future<void> Function()? stockAdjustment,
   }) async {
     await database.transaction(() async {
       final existingItemQuery = database.select(database.tabItems)
@@ -162,6 +175,10 @@ class DriftBarTabService implements BarTabService {
           TabItemsCompanion(quantity: Value(existingItem.quantity + 1)),
         );
 
+        if (stockAdjustment != null) {
+          await stockAdjustment();
+        }
+
         return;
       }
 
@@ -178,6 +195,10 @@ class DriftBarTabService implements BarTabService {
               createdAt: DateTime.now(),
             ),
           );
+
+      if (stockAdjustment != null) {
+        await stockAdjustment();
+      }
     });
   }
 
@@ -185,19 +206,31 @@ class DriftBarTabService implements BarTabService {
   Future<void> updateTabItemQuantity({
     required String tabItemId,
     required int quantity,
+    Future<void> Function()? stockAdjustment,
   }) async {
-    if (quantity <= 0) {
+    await database.transaction(() async {
-      final deleteQuery = database.delete(database.tabItems)
+      if (quantity <= 0) {
+        final deleteQuery = database.delete(database.tabItems)
+          ..where((item) => item.id.equals(tabItemId));
+
+        await deleteQuery.go();
+
+        if (stockAdjustment != null) {
+          await stockAdjustment();
+        }
+
+        return;
+      }
+
+      final updateQuery = database.update(database.tabItems)
         ..where((item) => item.id.equals(tabItemId));
 
-      await deleteQuery.go();
+      await updateQuery.write(TabItemsCompanion(quantity: Value(quantity)));
-      return;
-    }
 
-    final updateQuery = database.update(database.tabItems)
+      if (stockAdjustment != null) {
-      ..where((item) => item.id.equals(tabItemId));
+        await stockAdjustment();
-
+      }
-    await updateQuery.write(TabItemsCompanion(quantity: Value(quantity)));
+    });
   }
 
   @override
@@ -255,8 +288,26 @@ class DriftBarTabService implements BarTabService {
 
   @override
   Future<List<ClosedTab>> getClosedTabs() async {
-    final query = database.select(database.closedTabs)
+    final count = await getClosedTabCount();
-      ..orderBy([(tab) => OrderingTerm.desc(tab.closedAt)]);
+    if (count == 0) return [];
+
+    return getClosedTabsPaginated(limit: count, offset: 0);
+  }
+
+  @override
+  Future<List<ClosedTab>> getClosedTabsPaginated({
+    int limit = 20,
+    int offset = 0,
+    String? customerName,
+  }) async {
+    var query = database.select(database.closedTabs)
+      ..orderBy([(tab) => OrderingTerm.desc(tab.closedAt)])
+      ..limit(limit, offset: offset);
+
+    if (customerName != null && customerName.isNotEmpty) {
+      query = query
+        ..where((tab) => tab.customerName.equals(customerName));
+    }
 
     final closedTabRows = await query.get();
 
@@ -281,4 +332,30 @@ class DriftBarTabService implements BarTabService {
 
     return closedTabs;
   }
+
+  @override
+  Future<int> getClosedTabCount({String? customerName}) async {
+    final countExpr = database.closedTabs.id.count();
+
+    var query = database.selectOnly(database.closedTabs)
+      ..addColumns([countExpr]);
+
+    if (customerName != null && customerName.isNotEmpty) {
+      query = query
+        ..where(database.closedTabs.customerName.equals(customerName));
+    }
+
+    final row = await query.getSingle();
+    return row.read(countExpr) ?? 0;
+  }
+
+  @override
+  Future<List<String>> getDistinctCustomerNames() async {
+    final rows = await database.select(database.closedTabs).get();
+    return rows
+        .map((row) => row.customerName)
+        .toSet()
+        .toList()
+      ..sort();
+  }
 }

lib/utils/app_config.dart

@@ -0,0 +1 @@
+const kUpdateServerUrl = 'https://updater.brammie15.dev';

lib/utils/app_update_util.dart

@@ -36,6 +36,21 @@ class UpdateInfo {
       download: json["download"] ?? "",
     );
   }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is UpdateInfo &&
+          update == other.update &&
+          version == other.version &&
+          notes == other.notes &&
+          mandatory == other.mandatory &&
+          sha256 == other.sha256 &&
+          download == other.download;
+
+  @override
+  int get hashCode =>
+      Object.hash(update, version, notes, mandatory, sha256, download);
 }
 
 class AppUpdateUtil {

lib/utils/app_updater.dart

@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:kooltab2/utils/app_update_util.dart';
 import 'package:ota_update/ota_update.dart';
 
+import 'app_config.dart';
+
 class UpdateChecker {
   static bool _hasChecked = false;
 
@@ -13,7 +15,7 @@ class UpdateChecker {
 
     _hasChecked = true;
 
-    final updater = AppUpdateUtil(serverUrl: "https://updater.brammie15.dev");
+    final updater = AppUpdateUtil(serverUrl: kUpdateServerUrl);
 
     try {
       final update = await updater.checkForUpdate();
@@ -72,7 +74,7 @@ Future<void> _downloadAndInstall(UpdateInfo update) async {
   try {
     final url = update.download.startsWith("http")
         ? update.download
-        : "https://updater.brammie15.dev${update.download}";
+        : "$kUpdateServerUrl${update.download}";
     OtaUpdate()
         .execute(
           url,

lib/viewmodels/bar_screen_view_model.dart

@@ -88,9 +88,11 @@ class BarScreenViewModel extends ChangeNotifier {
       throw Exception('Product is out of stock.');
     }
 
-    await barTabService.addProductToTab(tabId: tab.id, product: product);
+    await barTabService.addProductToTab(
-
+      tabId: tab.id,
-    await inventory.decreaseStock(product.id, 1);
+      product: product,
+      stockAdjustment: () => inventory.decreaseStock(product.id, 1),
+    );
 
     await _reloadTabs();
   }
@@ -101,14 +103,15 @@ class BarScreenViewModel extends ChangeNotifier {
     await barTabService.updateTabItemQuantity(
       tabItemId: item.id,
       quantity: quantity,
+      stockAdjustment: () async {
+        if (difference > 0) {
+          await inventory.decreaseStock(item.productId, difference);
+        } else if (difference < 0) {
+          await inventory.increaseStock(item.productId, -difference);
+        }
+      },
     );
 
-    if (difference > 0) {
-      await inventory.decreaseStock(item.productId, difference);
-    } else if (difference < 0) {
-      await inventory.increaseStock(item.productId, -difference);
-    }
-
     await _reloadTabs();
   }
 

lib/viewmodels/dev_menu_view_model.dart

@@ -254,4 +254,73 @@ class DevMenuViewModel extends ChangeNotifier {
       notifyListeners();
     }
   }
+
+  Future<void> generateMockOrders({int count = 100}) async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      final products = await productService.getProducts();
+      if (products.isEmpty) {
+        _lastAction = 'No products available — seed demo data first';
+        return;
+      }
+
+      final uuid = const Uuid();
+      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',
+      ];
+
+      await database.transaction(() async {
+        for (var i = 0; i < count; i++) {
+          final customer = customerNames[i % customerNames.length];
+          final closedTabId = uuid.v4();
+          final itemCount = 1 + (i % 5);
+
+          final closedAt = DateTime.now().subtract(
+            Duration(
+              days: i % 90,
+              hours: i % 24,
+              minutes: i % 60,
+            ),
+          );
+
+          await database.into(database.closedTabs).insert(
+            ClosedTabsCompanion.insert(
+              id: closedTabId,
+              originalTabId: uuid.v4(),
+              customerName: customer,
+              closedAt: closedAt,
+            ),
+          );
+
+          for (var j = 0; j < itemCount; j++) {
+            final product = products[(i + j) % products.length];
+            final quantity = 1 + ((i * 7 + j * 13) % 6);
+
+            await database.into(database.closedTabItems).insert(
+              ClosedTabItemsCompanion.insert(
+                id: uuid.v4(),
+                closedTabId: closedTabId,
+                productId: product.id,
+                productName: product.name,
+                quantity: quantity,
+                unitPriceInCents: product.priceInCents,
+              ),
+            );
+          }
+        }
+      });
+
+      _lastAction = 'Generated $count mock orders across '
+          '${customerNames.length} customers';
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
 }

lib/viewmodels/history_view_model.dart

@@ -8,9 +8,16 @@ class HistoryViewModel extends ChangeNotifier {
 
   HistoryViewModel({required this.barTabService});
 
+  static const int _pageSize = 20;
+
   List<ClosedTab> _closedTabs = [];
+  List<String> _customerNames = [];
+  String? _selectedCustomer;
+  int _offset = 0;
+  int _totalCount = 0;
   bool _isLoading = false;
   bool _hasLoaded = false;
+  bool _isLoadingMore = false;
   String? _errorMessage;
   String _searchQuery = '';
 
@@ -26,10 +33,18 @@ class HistoryViewModel extends ChangeNotifier {
         .toList();
   }
 
+  List<String> get customerNames => _customerNames;
+
+  String? get selectedCustomer => _selectedCustomer;
+
   bool get isLoading => _isLoading;
 
   bool get hasLoaded => _hasLoaded;
 
+  bool get isLoadingMore => _isLoadingMore;
+
+  bool get hasMore => _closedTabs.length < _totalCount;
+
   String? get errorMessage => _errorMessage;
 
   Future<void> ensureLoaded() async {
@@ -46,7 +61,18 @@ class HistoryViewModel extends ChangeNotifier {
     notifyListeners();
 
     try {
-      _closedTabs = await barTabService.getClosedTabs();
+      final results = await Future.wait([
+        _fetchPage(offset: 0),
+        barTabService.getClosedTabCount(
+          customerName: _selectedCustomer,
+        ),
+        barTabService.getDistinctCustomerNames(),
+      ]);
+
+      _closedTabs = results[0] as List<ClosedTab>;
+      _totalCount = results[1] as int;
+      _customerNames = results[2] as List<String>;
+      _offset = _closedTabs.length;
     } catch (_) {
       _errorMessage = 'Could not load tab history.';
     } finally {
@@ -56,8 +82,43 @@ class HistoryViewModel extends ChangeNotifier {
     }
   }
 
+  Future<void> loadMore() async {
+    if (_isLoadingMore || !hasMore) return;
+
+    _isLoadingMore = true;
+    notifyListeners();
+
+    try {
+      final more = await _fetchPage(offset: _offset);
+      _closedTabs = [..._closedTabs, ...more];
+      _offset = _closedTabs.length;
+    } catch (_) {
+      _errorMessage = 'Could not load more tabs.';
+    } finally {
+      _isLoadingMore = false;
+      notifyListeners();
+    }
+  }
+
+  Future<List<ClosedTab>> _fetchPage({required int offset}) {
+    return barTabService.getClosedTabsPaginated(
+      limit: _pageSize,
+      offset: offset,
+      customerName: _selectedCustomer,
+    );
+  }
+
   void search(String query) {
     _searchQuery = query;
     notifyListeners();
   }
-}
+
+  Future<void> filterByCustomer(String? customerName) async {
+    _selectedCustomer = customerName;
+    _searchQuery = '';
+    _offset = 0;
+    _closedTabs = [];
+
+    await load();
+  }
+}

lib/viewmodels/settings_view_model.dart

@@ -4,6 +4,7 @@ import 'package:ota_update/ota_update.dart';
 
 import '../models/settings.dart';
 import '../services/settings_service.dart';
+import '../utils/app_config.dart';
 
 class SettingsViewModel extends ChangeNotifier {
   final SettingsService settingsService;
@@ -15,9 +16,7 @@ class SettingsViewModel extends ChangeNotifier {
   bool _hasLoaded = false;
   String? _errorMessage;
 
-  final AppUpdateUtil _updater = AppUpdateUtil(
+  final AppUpdateUtil _updater = AppUpdateUtil(serverUrl: kUpdateServerUrl);
-    serverUrl: "https://updater.brammie15.dev",
-  );
 
   bool _checkingForUpdates = false;
 
@@ -74,7 +73,7 @@ class SettingsViewModel extends ChangeNotifier {
   }) async {
     final url = update.download.startsWith("http")
         ? update.download
-        : "https://updater.brammie15.dev${update.download}";
+        : "$kUpdateServerUrl${update.download}";
 
     debugPrint("Download Url: ${url}");
 

lib/views/dev_menu_view.dart

@@ -107,6 +107,12 @@ class _DevMenuViewState extends State<DevMenuView> {
                 subtitle: 'Show FPS, memory, widget count',
                 onTap: () => _showDebugOverlayInfo(),
               ),
+              _Tile(
+                icon: Icons.error_outline_rounded,
+                title: 'Error screen',
+                subtitle: 'View the error screen UI',
+                onTap: () => context.push('/error'),
+              ),
             ],
           ),
           _Section(
@@ -141,6 +147,14 @@ class _DevMenuViewState extends State<DevMenuView> {
                 subtitle: 'Set all products below threshold',
                 onTap: vm.isLoading ? null : () => vm.simulateLowStock(),
               ),
+              _Tile(
+                icon: Icons.history_rounded,
+                title: 'Generate 100 mock orders',
+                subtitle: 'Random customers, items, and amounts',
+                onTap: vm.isLoading
+                    ? null
+                    : () => vm.generateMockOrders(count: 100),
+              ),
             ],
           ),
           _Section(

lib/views/error_screen_view.dart

@@ -0,0 +1,65 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+class ErrorScreenView extends StatelessWidget {
+  const ErrorScreenView({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final scheme = Theme.of(context).colorScheme;
+
+    return Scaffold(
+      appBar: AppBar(
+        leading: IconButton(
+          onPressed: () => context.pop(),
+          icon: const Icon(Icons.arrow_back),
+        ),
+        title: const Text('Error Screen'),
+        centerTitle: true,
+      ),
+      body: Center(
+        child: Padding(
+          padding: const EdgeInsets.all(32),
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Container(
+                padding: const EdgeInsets.all(24),
+                decoration: BoxDecoration(
+                  shape: BoxShape.circle,
+                  color: scheme.error.withValues(alpha: 0.12),
+                ),
+                child: Icon(
+                  Icons.error_outline_rounded,
+                  size: 64,
+                  color: scheme.error,
+                ),
+              ),
+              const SizedBox(height: 24),
+              Text(
+                'Something went wrong',
+                style: Theme.of(context).textTheme.headlineMedium?.copyWith(
+                      color: scheme.error,
+                    ),
+              ),
+              const SizedBox(height: 12),
+              Text(
+                'An unexpected error occurred.\nPlease try restarting the app.',
+                textAlign: TextAlign.center,
+                style: Theme.of(context).textTheme.bodyLarge?.copyWith(
+                      color: scheme.onSurface.withValues(alpha: 0.6),
+                    ),
+              ),
+              const SizedBox(height: 32),
+              FilledButton.icon(
+                onPressed: () => context.go('/bar'),
+                icon: const Icon(Icons.home_rounded),
+                label: const Text('Go to bar screen'),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/views/history_screen_view.dart

@@ -1,12 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
-import 'package:intl/intl.dart';
 import 'package:kooltab2/views/widgets/closed_tab_card.dart';
 import 'package:provider/provider.dart';
 
 import '../app/router.dart';
-import '../models/closed_tab.dart';
-import '../models/closed_tab_item.dart';
 import '../viewmodels/history_view_model.dart';
 
 class HistoryScreenView extends StatefulWidget {
@@ -17,10 +14,14 @@ class HistoryScreenView extends StatefulWidget {
 }
 
 class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
+  final _scrollController = ScrollController();
+
   @override
   void initState() {
     super.initState();
 
+    _scrollController.addListener(_onScroll);
+
     WidgetsBinding.instance.addPostFrameCallback((_) {
       context.read<HistoryViewModel>().load();
     });
@@ -34,16 +35,23 @@ class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
 
   @override
   void didPopNext() {
-    // Called when you come back to this screen
     context.read<HistoryViewModel>().load();
   }
 
   @override
   void dispose() {
     routeObserver.unsubscribe(this);
+    _scrollController.removeListener(_onScroll);
+    _scrollController.dispose();
     super.dispose();
   }
 
+  void _onScroll() {
+    if (_scrollController.position.extentAfter < 300) {
+      context.read<HistoryViewModel>().loadMore();
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final viewModel = context.watch<HistoryViewModel>();
@@ -53,9 +61,7 @@ class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
         title: Row(
           children: [
             IconButton(
-              onPressed: () {
+              onPressed: () => context.go('/bar'),
-                context.go('/bar');
-              },
               icon: const Icon(Icons.arrow_back),
             ),
             const SizedBox(width: 5),
@@ -108,23 +114,51 @@ class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
             children: [
               Padding(
                 padding: const EdgeInsets.fromLTRB(20, 16, 20, 8),
-                child: TextField(
+                child: Row(
-                  onChanged: viewModel.search,
+                  children: [
-                  decoration: const InputDecoration(
+                    Expanded(
-                    hintText: 'Search by name…',
+                      child: TextField(
-                    prefixIcon: Icon(Icons.search_rounded, size: 20),
+                        onChanged: viewModel.search,
-                    isDense: true,
+                        decoration: const InputDecoration(
-                  ),
+                          hintText: 'Search by name…',
+                          prefixIcon: Icon(Icons.search_rounded, size: 20),
+                          isDense: true,
+                        ),
+                      ),
+                    ),
+                    const SizedBox(width: 12),
+                    _CustomerDropdown(
+                      customerNames: viewModel.customerNames,
+                      selectedCustomer: viewModel.selectedCustomer,
+                      onSelected: viewModel.filterByCustomer,
+                    ),
+                  ],
                 ),
               ),
               Expanded(
                 child: viewModel.closedTabs.isEmpty
                     ? _EmptyState()
                     : ListView.separated(
+                        controller: _scrollController,
                         padding: const EdgeInsets.fromLTRB(20, 8, 20, 20),
-                        itemCount: viewModel.closedTabs.length,
+                        itemCount: viewModel.closedTabs.length +
-                        separatorBuilder: (_, _) => const SizedBox(height: 10),
+                            (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);
@@ -139,6 +173,126 @@ class _HistoryScreenViewState extends State<HistoryScreenView> with RouteAware {
   }
 }
 
+class _CustomerDropdown extends StatelessWidget {
+  static const _allSentinel = r'$__all__$';
+
+  final List<String> customerNames;
+  final String? selectedCustomer;
+  final ValueChanged<String?> onSelected;
+
+  const _CustomerDropdown({
+    required this.customerNames,
+    required this.selectedCustomer,
+    required this.onSelected,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final scheme = Theme.of(context).colorScheme;
+    final isFiltered = selectedCustomer != null;
+
+    return PopupMenuButton<String>(
+      onSelected: (value) {
+        onSelected(value == _allSentinel ? null : value);
+      },
+      offset: const Offset(0, 44),
+      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(
+                'All customers',
+                style: TextStyle(
+                  fontWeight: isFiltered ? FontWeight.w400 : FontWeight.w700,
+                  color: isFiltered ? null : scheme.primary,
+                ),
+              ),
+            ],
+          ),
+        ),
+        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),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ],
+      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,
+              color: isFiltered
+                  ? scheme.primary
+                  : scheme.onSurface.withValues(alpha: 0.5),
+            ),
+            const SizedBox(width: 6),
+            Flexible(
+              child: Text(
+                selectedCustomer ?? 'Customer',
+                overflow: TextOverflow.ellipsis,
+                style: TextStyle(
+                  fontWeight: FontWeight.w600,
+                  fontSize: 13,
+                  color: isFiltered
+                      ? scheme.primary
+                      : scheme.onSurface.withValues(alpha: 0.5),
+                ),
+              ),
+            ),
+            const SizedBox(width: 4),
+            Icon(
+              Icons.arrow_drop_down_rounded,
+              size: 18,
+              color: isFiltered
+                  ? scheme.primary
+                  : scheme.onSurface.withValues(alpha: 0.5),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
 class _EmptyState extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
@@ -174,4 +328,4 @@ class _EmptyState extends StatelessWidget {
       ),
     );
   }
-}
+}

lib/views/product_form_view.dart

@@ -36,6 +36,7 @@ class _ProductFormViewState extends State<ProductFormView> {
 
   Product? _existingProduct;
   String? _imagePath;
+  bool _hasImage = false;
   bool _isLoading = true;
   bool _isSaving = false;
 
@@ -72,6 +73,7 @@ class _ProductFormViewState extends State<ProductFormView> {
     _stockController.text = product.stockQuantity.toString();
     _lowStockController.text = product.lowStockThreshold.toString();
     _imagePath = product.imagePath;
+    _hasImage = product.imagePath != null && product.imagePath!.isNotEmpty;
 
     setState(() => _isLoading = false);
   }
@@ -108,10 +110,11 @@ class _ProductFormViewState extends State<ProductFormView> {
 
   Future<void> _pickImage() async {
     final pickedFile = await _imagePicker.pickImage(
-      source: ImageSource.gallery,
+    source: ImageSource.gallery,
-      imageQuality: 85,
+    imageQuality: 80,
-      maxWidth: 1000,
+    maxWidth: 1000,
-    );
+    maxHeight: 1000,
+  );
 
     if (pickedFile == null) return;
 
@@ -121,6 +124,7 @@ class _ProductFormViewState extends State<ProductFormView> {
 
     setState(() {
       _imagePath = copiedImagePath;
+      _hasImage = true;
     });
   }
 
@@ -222,7 +226,6 @@ class _ProductFormViewState extends State<ProductFormView> {
   }
 
   Widget _buildImagePicker(BuildContext context) {
-    final hasImage = _imagePath != null && File(_imagePath!).existsSync();
 
     return InkWell(
       onTap: _pickImage,
@@ -234,11 +237,22 @@ class _ProductFormViewState extends State<ProductFormView> {
           border: Border.all(color: Theme.of(context).colorScheme.outline),
         ),
         clipBehavior: Clip.antiAlias,
-        child: hasImage
+        child: _hasImage
             ? Stack(
                 fit: StackFit.expand,
                 children: [
-                  Image.file(File(_imagePath!), fit: BoxFit.fitHeight),
+                  Image.file(
+                    File(_imagePath!),
+                    fit: BoxFit.fitHeight,
+                    cacheWidth: 1000,
+                    errorBuilder: (context, error, stackTrace) => Center(
+                      child: Icon(
+                        Icons.broken_image_outlined,
+                        size: 48,
+                        color: Theme.of(context).colorScheme.outline,
+                      ),
+                    ),
+                  ),
                   Positioned(
                     right: 12,
                     bottom: 12,

lib/views/product_list_view.dart

@@ -73,10 +73,17 @@ class _ProductListViewState extends State<ProductListView> {
                     width: 56,
                     height: 56,
                     child: Center(
-                      child: Image.file(
+                      child: product.imagePath != null &&
-                        File(product.imagePath!),
+                              product.imagePath!.isNotEmpty
-                        fit: BoxFit.contain,
+                          ? Image.file(
-                      ),
+                              File(product.imagePath!),
+                              fit: BoxFit.contain,
+                              cacheWidth: 112,
+                              errorBuilder:
+                                  (context, error, stackTrace) =>
+                                      const Icon(Icons.image_not_supported_outlined),
+                            )
+                          : const Icon(Icons.image_not_supported_outlined),
                     ),
                   ),
                   title: Text(product.name),

lib/views/widgets/product_tile.dart

@@ -7,6 +7,7 @@ class ProductTile extends StatelessWidget {
   final Product product;
   final bool enabled;
   final VoidCallback onTap;
+  static const _tileImageSize = 280.0;
 
   const ProductTile({
     required this.product,
@@ -14,16 +15,6 @@ class ProductTile extends StatelessWidget {
     required this.onTap,
   });
 
-  bool get _hasImage {
-    final imagePath = product.imagePath;
-
-    if (imagePath == null || imagePath.isEmpty) {
-      return false;
-    }
-
-    return File(imagePath).existsSync();
-  }
-
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
@@ -32,7 +23,10 @@ class ProductTile extends StatelessWidget {
     final outOfStock = product.stockQuantity <= 0;
     final lowStock =
         product.stockQuantity > 0 &&
-        product.stockQuantity <= product.lowStockThreshold; // adjust name
+        product.stockQuantity <= product.lowStockThreshold;
+
+    final hasImage = product.imagePath != null &&
+        product.imagePath!.isNotEmpty;
 
     final borderColor = outOfStock
         ? scheme.error.withValues(alpha: 0.7)
@@ -59,21 +53,18 @@ class ProductTile extends StatelessWidget {
               children: [
                 Opacity(
                   opacity: outOfStock ? 0.35 : (enabled ? 1 : 0.4),
-                  child: _hasImage
+                  child: hasImage
                       ? Image.file(
                           File(product.imagePath!),
                           fit: BoxFit.scaleDown,
+                          cacheWidth: _tileImageSize.toInt(),
+                          errorBuilder:
+                              (context, error, stackTrace) => _noImage(scheme),
                         )
-                      : Center(
+                      : _noImage(scheme),
-                          child: Icon(
-                            Icons.image_not_supported_outlined,
-                            size: 34,
-                            color: scheme.onSurface.withValues(alpha: 0.3),
-                          ),
-                        ),
                 ),
 
-                if (_hasImage)
+                if (hasImage)
                   Positioned.fill(
                     child: DecoratedBox(
                       decoration: BoxDecoration(
@@ -126,6 +117,16 @@ class ProductTile extends StatelessWidget {
       ),
     );
   }
+
+  Widget _noImage(ColorScheme scheme) {
+    return Center(
+      child: Icon(
+        Icons.image_not_supported_outlined,
+        size: 34,
+        color: scheme.onSurface.withValues(alpha: 0.3),
+      ),
+    );
+  }
 }
 
 class _StockBadge extends StatelessWidget {
@@ -141,8 +142,7 @@ class _StockBadge extends StatelessWidget {
       return const SizedBox.shrink();
     }
 
-    final low =
+    final low = product.stockQuantity <= product.lowStockThreshold;
-        product.stockQuantity <= product.lowStockThreshold; // adjust name
 
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),