优化用户注销功能及token处理逻辑

stores/user.ts

@@ -28,6 +28,8 @@ export default defineStore('useUserStore', {
       this.userName = userName
     },
     logout() {
+      const token = useCookie<string | undefined>('token')
+      token.value = ''
       refreshToken.removeToken()
       localStorage.removeItem('tuxixi-store')
       if (self === top) {