[카트] 쿠폰가 관련노출 수정

- 쿠폰이 들어있어 고객들은 알수없는 부분때문에 쿠폰가에 대해서 0처리

com.twin.app.shoptime/src/views/CartPanel/CartSidebar.jsx

@@ -90,7 +90,7 @@ const CartSidebar = ({ cartInfo }) => {
           const orderSummary = calculateOrderSummaryFromProductInfo(item);
           cache.set(item.prodSno || item.cartId, {
             price: orderSummary.items,
-            coupon: orderSummary.couponSavings,
+            coupon: 0,
             shipping: orderSummary.shipping
           });
         }
@@ -144,7 +144,6 @@ const CartSidebar = ({ cartInfo }) => {
         });
 
         const subtotal = Math.max(0, totalItems - totalCoupon + totalShipping);
-
         if (DEBUG_LOG) {
           console.log('[CartSidebar] Final calculation for selected items:', {
             totalQuantity,
@@ -391,7 +390,7 @@ const CartSidebar = ({ cartInfo }) => {
           <div className={css.priceItem}>
             <span className={css.label}>Option</span>
             <span className={css.value}>
-              {formatPrice(optionTotal)}
+              {formatPrice(optionTotal)}              
             </span>
           </div>
           <div className={css.priceItem}>