changes

src/app/services/cart.service.ts

@@ -103,7 +103,7 @@ export class CartService {
     return false;
   }
 
-  addItem(itemID: number, quantity: number = 1): void {
+  addItem(itemID: number, quantity: number = 1, variant?: { colour?: string; size?: string; price?: number; currency?: string }): void {
     // Prevent duplicate API calls for same item
     if (this.addingItems.has(itemID)) return;
     
@@ -118,7 +118,14 @@ export class CartService {
       this.addingItems.add(itemID);
       this.apiService.getItem(itemID).subscribe({
         next: (item) => {
-          const cartItem: CartItem = { ...item, quantity };
+          const cartItem: CartItem = {
+            ...item,
+            quantity,
+            ...(variant?.colour != null && { colour: variant.colour }),
+            ...(variant?.size != null && { size: variant.size }),
+            ...(variant?.price != null && { price: variant.price }),
+            ...(variant?.currency != null && { currency: variant.currency }),
+          };
           this.cartItems.set([...this.cartItems(), cartItem]);
           this.addingItems.delete(itemID);
         },