消息置顶功能

src/views/live/liveConsole/index.vue

@@ -60,6 +60,7 @@
             >
             </el-input>
             <div style="display: flex; justify-content: flex-end; margin-top: 10px;">
+              <el-button style="background: #13C2C2;color: #fff;" @click="showTopMsgDialog">顶部消息</el-button>
               <el-button style="background: #13C2C2;color: #fff;" @click="sendMessage">发送</el-button>
             </div>
           </div>