fix

chat.vue

 <template>
-    <div class="chat-con" :class="{ userMode }">
+    <div class="chat-con" :class="{ userMode, isSingle: isSingleChat }">
         <ChatTitle :close="hide" class="chat-title" />
         <div class="chat-area-con" :class="{isSingle: isSingleChat, needSearch: !modelName}">
             <div v-if="chatId != null" class="h-100 chat-area">
@@ -129,6 +129,9 @@ export default class Chat extends Vue {
     --chat-panel-width: 350px;
     font-size: 13px;
     color: black;
+    &.isSingle {
+        height: 70vh;
+    }
     &.userMode {
         --chat-panel-width: 0px;
         .chat-title {