feat: 优化

src/views/customerService/chatDetail.vue

@@ -292,7 +292,10 @@ export default {
           chat.off(TencentCloudChat.EVENT.MESSAGE_RECEIVED, this.onMessageReceived)
           const chatItem = this.customerList[this.currentCustomerIndex]
           this.handleGetUserSign(chatItem.code)
-        }).catch(function(imError) {
+        }).catch((imError) => {
+          this.$notify.error({
+            title: '切换失败'
+          })
           this.closeLoading()
           console.warn('====登出失败:', imError) // 登录失败的相关信息
         })