update 公共样式、加载效果、$message、api去掉不用的接口

src/components/ProcessCommonLayout.vue

@@ -1,5 +1,8 @@
 <template>
   <div>
+    <van-overlay :show="loading">
+      <van-loading />
+    </van-overlay>
     <div class="header-switch">
       <!--基础信息-->
       <div class="header-switch-item header-switch-left"
@@ -31,6 +34,14 @@
 <script>
 export default {
   name: 'ProcessCommonLayout',
+  props: {
+    // 加载效果
+    loading: {
+      type: Boolean,
+      required: false,
+      default: false
+    }
+  },
   data () {
     return {
       activeTab: 'basic'
@@ -95,4 +106,11 @@ export default {
   align-items: center;
   justify-content: center;
 }
+
+.van-overlay {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  background-color: rgba(0, 0, 0, 0.3);
+}
 </style>