add auth, format

lib/features/cart/presentation/providers/cart_state.dart

@@ -12,18 +12,12 @@ class CartItemData {
   final Product product;
   final double quantity;
 
-  const CartItemData({
-    required this.product,
-    required this.quantity,
-  });
+  const CartItemData({required this.product, required this.quantity});
 
   /// Calculate line total
   double get lineTotal => product.basePrice * quantity;
 
-  CartItemData copyWith({
-    Product? product,
-    double? quantity,
-  }) {
+  CartItemData copyWith({Product? product, double? quantity}) {
     return CartItemData(
       product: product ?? this.product,
       quantity: quantity ?? this.quantity,
@@ -101,7 +95,8 @@ class CartState {
       discountCode: discountCode ?? this.discountCode,
       discountCodeApplied: discountCodeApplied ?? this.discountCodeApplied,
       memberTier: memberTier ?? this.memberTier,
-      memberDiscountPercent: memberDiscountPercent ?? this.memberDiscountPercent,
+      memberDiscountPercent:
+          memberDiscountPercent ?? this.memberDiscountPercent,
       subtotal: subtotal ?? this.subtotal,
       memberDiscount: memberDiscount ?? this.memberDiscount,
       shippingFee: shippingFee ?? this.shippingFee,