style: page styles

src/pages/playground/style/ground-left.less

@@ -1,6 +1,6 @@
 .ground-left {
   position: relative;
-  height: 100vh;
+  height: calc(100vh - 84px);
   padding-bottom: 120px;
 
   .message-list-wrap {

src/pages/playground/style/play-ground.less

@@ -1,20 +1,24 @@
 .play-ground {
   display: flex;
   align-items: flex-start;
+
   .chat {
     flex: 1;
     display: flex;
     flex-direction: column;
   }
+
   .params {
     // width: 465px;
     padding: 20px;
   }
+
   .divider-line {
     width: 1px;
+
     .ant-divider {
       margin: 0;
-      min-height: 100vh;
+      min-height: calc(100vh - 84px);
     }
   }
 }