更新 删除按钮显示逻辑

src/views/voyage/voyageDetail.vue

@@ -152,7 +152,7 @@
           修改
         </el-button>
         <el-button
-          v-if="voyage.voyageStatus != 2"
+          v-if="voyage.voyageStatus != 2 && voyage.voyageDetails.length > 1"
           @click="deleteDischargePort(item)"
           class="ml20"
           type="danger"