refactor(create-order): 优化关联订单信息的字段命名

- 在 OrderDetailCardProductList.vue 和 SelectOrderDetailCard.vue 中
- 将 product_code 字段名统一修改为 productCode
- 优化代码可读性，提高维护性

Signed-off-by: tangshizhe <48740614+tangshizhe@users.noreply.github.com>

src/views/create-order/components/order-detail-submodule/OrderDetailCardProductList.vue

@@ -266,7 +266,7 @@ export default {
               const finalPrice = this.formatNumber(product.final_price);
               let originalPrice = this.formatNumber(product.original_price);
               const linkedOrder = product.linkedOrder || {}; // 关联订单信息
-              const { buySubject, empowerCount, name, serviceStartTime, serviceEndTime, provinceCount, product_code: productCode, orderArr } = linkedOrder || {}
+              const { buySubject, empowerCount, name, serviceStartTime, serviceEndTime, provinceCount, productCode, orderArr } = linkedOrder || {}
 
               const options = [{
                 buySubject,

src/views/create-order/components/order-detail-submodule/SelectOrderDetailCard.vue

@@ -445,7 +445,7 @@ export default {
                 const finalPrice = this.formatNumber(product.final_price);
                 let originalPrice = this.formatNumber(product.original_price);
                 const linkedOrder = product.linkedOrder || {}; // 关联订单信息
-                const { buySubject, empowerCount, name, serviceStartTime, serviceEndTime, provinceCount, product_code: productCode, orderArr } = linkedOrder || {}
+                const { buySubject, empowerCount, name, serviceStartTime, serviceEndTime, provinceCount, productCode, orderArr } = linkedOrder || {}
 
                 const options = [{
                   buySubject,