feat: add more detailed history and group per day

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,
+  );
 }