feat: use login/logout from sdk instead of manual setToken

src/App.vue

@@ -7,7 +7,7 @@
 
 <script setup lang="ts">
 import { ref } from 'vue'
-import { setToken, setUserId } from '@xuqm/vue3-sdk'
+import { login, logout } from '@xuqm/vue3-sdk'
 import LoginView from './views/LoginView.vue'
 import ChatDemoView from './views/ChatDemoView.vue'
 
@@ -17,15 +17,13 @@ const userId = ref<string>('')
 function handleLogin(t: string, u: string) {
   token.value = t
   userId.value = u
-  setToken(t)
-  setUserId(u)
+  login(u, t)
 }
 
 function handleLogout() {
   token.value = ''
   userId.value = ''
-  setToken(null)
-  setUserId(null)
+  logout()
 }
 </script>