feat: 封装一些函数，补充页面样式

Co-authored-by: Copilot <copilot@github.com>

server/api/auth/login.post.ts

@@ -107,6 +107,7 @@ export default defineEventHandler(async (event) => {
 const normalizeLoginResponse = (
   response: NewApiLoginResponse | undefined
 ): { message: string; user: IUserLoginData | null } => {
+  consola.info("user data", response);
   if (isUser(response)) {
     return {
       message: "登录成功",
@@ -152,6 +153,7 @@ const pickUserBasicData = (user: INewApiLoginUserData): IUserLoginData => {
   };
 };
 
+/** 判断值是否为合法的 NewAPI 登录用户对象，所有必需字段均须类型正确 */
 const isUser = (value: unknown): value is INewApiLoginUserData => {
   return (
     isRecord(value) &&
@@ -164,6 +166,7 @@ const isUser = (value: unknown): value is INewApiLoginUserData => {
   );
 };
 
+/** 判断值是否为非 null 的普通对象，用于后续安全访问属性 */
 const isRecord = (value: unknown): value is Record<string, unknown> => {
   return value !== null && typeof value === "object";
 };