修改退款操作：是否使用优惠券不可修改

src/views/system/order/index.vue

@@ -505,14 +505,7 @@
           <el-row :gutter="20">
           <el-col :span="12">
             <el-form-item label="是否使用优惠券" prop="isUseCoupon">
-              <el-radio-group v-model="refundForm.isUseCoupon" :readonly="true">
-                <el-radio
-                  v-for="dict in dict.type.store_is_use_coupon"
-                  :key="dict.value"
-                  :label="dict.value"
-                >{{ dict.label }}
-                </el-radio>
-              </el-radio-group>
+              <el-input v-model="refundForm.isUseCoupon" :readonly="true" />
             </el-form-item>
           </el-col>
         </el-row>
@@ -917,7 +910,8 @@ export default {
 
       this.refundForm.orderNo = row.orderNo;
       this.refundForm.orderStatus = this.orderStatusFormat(row.status);
-      this.refundForm.isUseCoupon = row.couponId ? '1' : '0';
+      let isUseCoupon = row.couponId ? '1' : '0';
+      this.refundForm.isUseCoupon = this.selectDictLabel(this.dict.type.store_is_use_coupon, isUseCoupon);
       if (row.couponId) {
         let coupon = this.couponList.find(item => item.id === row.couponId);
         this.refundForm.couponName = coupon.name;