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

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,
+      );
 }