[장바구니] 노출관련 및 api에 맞춰 작업 #1

- 현재 추가는 안됌.
 - 삭제, 갯수 조절에 대해서는 정상작동.
 - 금액 노출 정상적이지 않는 부분에 대해서 수정

com.twin.app.shoptime/src/reducers/cartReducer.js

@@ -40,31 +40,19 @@ export const cartReducer = (state = initialState, action) => {
           cartList: [...state.getMyinfoCartSearch.cartList, action.payload],
           totalCount: (state.getMyinfoCartSearch.totalCount || 0) + 1,
         },
-        lastAction: {
-          type: "insert",
-          data: action.payload,
-          timestamp: Date.now(),
-        },
-        error: null,
       };
 
     // 장바구니에서 상품 삭제
-    case types.DELETE_MY_INFO_CART:
+    case types.DELETE_MY_INFO_CART:      
       return {
         ...state,
         getMyinfoCartSearch: {
           ...state.getMyinfoCartSearch,
-          cartList: state.getMyinfoCartSearch.cartList.filter(
+          cartList: (state.getMyinfoCartSearch.cartList || []).filter(
             item => item.prodSno !== action.payload.prodSno
           ),
           totalCount: Math.max(0, (state.getMyinfoCartSearch.totalCount || 0) - 1),
         },
-        lastAction: {
-          type: "delete",
-          data: action.payload,
-          timestamp: Date.now(),
-        },
-        error: null,
       };
 
     case types.UPDATE_MY_INFO_CART:
@@ -72,13 +60,12 @@ export const cartReducer = (state = initialState, action) => {
         ...state,
         getMyinfoCartSearch: {
           ...state.getMyinfoCartSearch,
-          cartList: state.getMyinfoCartSearch.cartList.map(item =>
+          cartList: (state.getMyinfoCartSearch.cartList || []).map(item =>
             item.prodSno === action.payload.prodSno 
               ? { ...item, ...action.payload }
               : item
           ),
         },
-        error: null,
       };
 
     // 장바구니에 상품 추가 (addToCart - 로컬 상태용)