优化Profile.vue用户信息加载逻辑

frontend/src/views/Profile.vue

@@ -288,7 +288,8 @@ const passwordRules = {
 const loadUserInfo = async () => {
   try {
     const response = await getUserInfo()
-    // getUserInfo返回的是Result<UserInfo>，需要访问data属性
+    // request.get返回的是Result对象，需要访问data属性
+    // response结构: { code: 200, data: UserInfo, message: '' }
     const data = response.data
     userInfo.value = data
     userForm.username = userInfo.value.username