fix(dashboard): 更新仪表盘警告信息样式，使用粘性定位

resources/assets/js/pages/manage/dashboard.vue

@@ -1,10 +1,13 @@
 <template>
     <div class="page-dashboard">
         <PageTitle :title="$L('仪表盘')"/>
-        <Alert v-if="warningMsg" class="dashboard-warning" type="warning" show-icon>
-            <span @click="goForward({name: 'manage-setting-license'})">{{warningMsg}}</span>
-        </Alert>
         <Scrollbar class="dashboard-scroller">
+            <!--系统信息-->
+            <div v-if="!!warningMsg" class="dashboard-warning">
+                <Alert type="warning" show-icon>
+                    <span @click="goForward({name: 'manage-setting-license'})">{{warningMsg}}</span>
+                </Alert>
+            </div>
             <div class="dashboard-body">
                 <!--头部-->
                 <div class="dashboard-header">

resources/assets/sass/pages/page-dashboard.scss

@@ -5,25 +5,29 @@
     flex-direction: column;
     background-color: #ffffff;
 
-    .dashboard-warning {
-        border-top: 0;
-        border-top-left-radius: 0;
-        border-top-right-radius: 0;
-        padding-right: 14px;
-        position: fixed;
-        top: 0;
-        z-index: 2;
-        > span {
-            cursor: pointer;
-        }
-    }
-
     .dashboard-scroller {
         flex: 1;
         width: 100%;
         height: 100%;
     }
 
+    .dashboard-warning {
+        position: sticky;
+        top: 0;
+        z-index: 2;
+        display: flex;
+        justify-content: center;
+        .ivu-alert {
+            border-top: 0;
+            border-top-left-radius: 0;
+            border-top-right-radius: 0;
+            margin-bottom: 0;
+            > span {
+                cursor: pointer;
+            }
+        }
+    }
+
     .dashboard-body {
         max-width: 1208px;
         margin: 0 auto;