refactor: CSS 拆分 + auth 持久化提取 + 目录整理

- globals.css 拆分为 4 文件：tokens.css（颜色）/ transitions.css（过渡）/ base.css（重置）/ globals.css（入口）
- 提取 auth-persistence.ts 到 services/，解除 AppProvider→pages/login/hooks 反向依赖
- use-auth-state.ts 精简为纯 React Hook，持久化逻辑委托给 services/auth-persistence.ts
- components/common/ → components/ui/（目录名语义更清晰）
- TypeScript + Vite 构建通过

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/pages/login/components/LoginForm.tsx

@@ -8,7 +8,7 @@ import { UserOutlined, LockOutlined } from '@ant-design/icons';
 
 import { loginFields } from '../config/login-fields';
 import { validateForm } from '../config/validators';
-import { LegalTextModal } from '@/components/common/LegalTextModal';
+import { LegalTextModal } from '@/components/ui/LegalTextModal';
 import type { LoginFormValues } from '../types';
 
 const { Text } = Typography;

src/pages/login/components/RegisterForm.tsx

@@ -5,7 +5,7 @@
 import { useState, useCallback, useRef } from 'react';
 import { Input, Button, Checkbox, Typography } from 'antd';
 
-import { LegalTextModal } from '@/components/common/LegalTextModal';
+import { LegalTextModal } from '@/components/ui/LegalTextModal';
 import {
    UserOutlined,
    LockOutlined,

src/pages/login/hooks/use-auth-state.ts

@@ -1,76 +1,34 @@
 // ============================================================
-// useAuthState — 记住账号 / 自动登录 状态管理
+// useAuthState — 记住账号 / 自动登录 表单状态 Hook
 //
 // "记住密码"：下次打开页面自动回填用户名（不再存储密码）
 // "自动登录"：登录成功时标记，AppProvider 启动时用 refresh_token 静默续期
 //
+// 持久化逻辑已提取到 services/auth-persistence.ts，
+// 此处仅负责 React 组件状态（useState + useCallback）。
+//
 // 安全：
 //   - 密码从不持久化存储（access_token / refresh_token 由 safeStorage 加密保护）
 //   - 安全性由 refresh_token + access_token 的 JWT 双重机制 + OS 密钥链保障
 // ============================================================
 
 import { useState, useCallback } from 'react';
+import {
+   saveAuth,
+   clearSavedAuth,
+   getSavedUsername,
+   getSavedRemember,
+   getSavedAutoLogin,
+} from '@/services/auth-persistence';
 
-const STORAGE_KEY = 'ele-heixiu-auth';
-
-interface StoredAuth {
-   /** 上次登录的用户名（表单回填用） */
-   username: string;
-   /** 是否记住用户名（勾选后表单自动回填用户名） */
-   remember: boolean;
-   /** 是否勾选了自动登录（AppProvider 据此决定启动时是否刷新 token） */
-   autoLogin: boolean;
-}
-
-function readAuth(): StoredAuth | null {
-   try {
-      const raw = localStorage.getItem(STORAGE_KEY);
-      if (!raw) return null;
-      return JSON.parse(raw) as StoredAuth;
-   } catch {
-      return null;
-   }
-}
-
-function writeAuth(auth: StoredAuth): void {
-   try {
-      localStorage.setItem(STORAGE_KEY, JSON.stringify(auth));
-   } catch {
-      /* 静默 */
-   }
-}
-
-// ---------- 工具函数（不依赖 React，AppProvider 可直接调用）----------
-
-/** 读取自动登录标记 */
-export function getAutoLoginFlag(): boolean {
-   return readAuth()?.autoLogin || false;
-}
-
-/** 仅清除自动登录标记（保留用户名，下次还能回填表单） */
-export function clearAutoLoginFlag(): void {
-   const auth = readAuth();
-   if (!auth) return;
-   writeAuth({ ...auth, autoLogin: false });
-}
-
-/** 清除所有保存的认证信息 */
-export function clearSavedAuth(): void {
-   try {
-      localStorage.removeItem(STORAGE_KEY);
-   } catch {
-      /* 静默 */
-   }
-}
+export { getAutoLoginFlag, clearAutoLoginFlag, clearSavedAuth } from '@/services/auth-persistence';
 
 // ---------- Hook ----------
 
 export function useAuthState() {
-   const saved = readAuth();
-
-   const [username, setUsername] = useState(saved?.username || '');
-   const [remember, setRemember] = useState(saved?.remember || false);
-   const [autoLogin, setAutoLogin] = useState(saved?.autoLogin || false);
+   const [username, setUsername] = useState(getSavedUsername);
+   const [remember, setRemember] = useState(getSavedRemember);
+   const [autoLogin, setAutoLogin] = useState(getSavedAutoLogin);
 
    const handleRememberChange = useCallback((checked: boolean) => {
       setRemember(checked);
@@ -93,16 +51,11 @@ export function useAuthState() {
     * @param doRemember - 是否勾选"记住用户名"
     * @param doAutoLogin - 是否勾选"自动登录"
     */
-   const saveAuth = useCallback(
+   const handleSaveAuth = useCallback(
       (user: string, _password: string, doRemember: boolean, doAutoLogin: boolean) => {
          setUsername(user);
          if (doRemember || doAutoLogin) {
-            const payload: StoredAuth = {
-               username: user,
-               remember: doRemember,
-               autoLogin: doAutoLogin,
-            };
-            writeAuth(payload);
+            saveAuth(user, doRemember, doAutoLogin);
          }
       },
       [],
@@ -115,6 +68,6 @@ export function useAuthState() {
       setUsername,
       handleRememberChange,
       handleAutoLoginChange,
-      saveAuth,
+      saveAuth: handleSaveAuth,
    };
 }