feat(frontend):UI fix ；关于 fix

frontend/src/layout/components/AppMain.vue

@@ -25,8 +25,8 @@ export default {
     @import "~@/styles/variables.scss";
 
     .app-main {
-        /*107 = navbar 50 + topbar 57  */
-        min-height: calc(100vh - 107px);
+        /* topbar 56  */
+        min-height: calc(100vh - 56px);
         width: 100%;
         position: relative;
         overflow: hidden;

frontend/src/views/system/about/index.vue

 <template>
-  <layout-content>
-
-    <div>
+  <div style="width: 100%;display: flex;justify-content: center;">
     <el-card class="box-card about-card">
       <div slot="header" class="clearfix license-header">
         <img src="@/assets/DataEase-white.png" alt="" width="300">
@@ -64,17 +62,13 @@
       </div>
     </el-card>
   </div>
-  </layout-content>
 </template>
 
 <script>
-import LayoutContent from '@/components/business/LayoutContent'
 import { validate, buildVersion, updateInfo } from '@/api/system/about'
 import { getToken } from '@/utils/auth'
 import { mapGetters } from 'vuex'
 export default {
-
-  components: { LayoutContent },
   data() {
     return {
       license: {},
@@ -164,8 +158,6 @@ export default {
         background: inherit;
         margin-top: 5%;
         flex-direction: row;
-        margin-left: 20%;
-        margin-right: 20%;
         width: 640px;
         height: 400px;
         position: relative;