feat(user): 实现 useUser Hook 并更新相关组件

- 新增 useUser Hook 用于全局用户状态管理
- 更新 UserCard 和 UserCell 组件，集成 useUser 功能
- 添加 UserProfile 组件示例
- 更新 API 引用，统一使用 useUser

src/components/UserProfile.tsx

@@ -0,0 +1,99 @@
+import React from 'react';
+import { View, Text, Image } from '@tarojs/components';
+import { Button, Avatar } from '@nutui/nutui-react-taro';
+import { useUser } from '@/hooks/useUser';
+import navTo from '@/utils/common';
+
+// 用户资料组件示例
+const UserProfile: React.FC = () => {
+  const {
+    user,
+    isLoggedIn,
+    loading,
+    logoutUser,
+    fetchUserInfo,
+    getAvatarUrl,
+    getDisplayName,
+    isCertified,
+    getBalance,
+    getPoints
+  } = useUser();
+
+  // 处理登录跳转
+  const handleLogin = () => {
+    navTo('/pages/login/index');
+  };
+
+  // 处理退出登录
+  const handleLogout = () => {
+    logoutUser();
+    navTo('/pages/index/index');
+  };
+
+  // 刷新用户信息
+  const handleRefresh = async () => {
+    await fetchUserInfo();
+  };
+
+  if (loading) {
+    return (
+      <View className="user-profile loading">
+        <Text>加载中...</Text>
+      </View>
+    );
+  }
+
+  if (!isLoggedIn) {
+    return (
+      <View className="user-profile not-logged-in">
+        <View className="login-prompt">
+          <Text>请先登录</Text>
+          <Button type="primary" onClick={handleLogin}>
+            立即登录
+          </Button>
+        </View>
+      </View>
+    );
+  }
+
+  return (
+    <View className="user-profile">
+      <View className="user-header">
+        <Avatar
+          size="large"
+          src={getAvatarUrl()}
+          alt={getDisplayName()}
+        />
+        <View className="user-info">
+          <Text className="username">{getDisplayName()}</Text>
+          <Text className="user-id">ID: {user?.userId}</Text>
+          {isCertified() && (
+            <Text className="certified">已实名认证</Text>
+          )}
+        </View>
+      </View>
+
+      <View className="user-stats">
+        <View className="stat-item">
+          <Text className="stat-value">¥{getBalance()}</Text>
+          <Text className="stat-label">余额</Text>
+        </View>
+        <View className="stat-item">
+          <Text className="stat-value">{getPoints()}</Text>
+          <Text className="stat-label">积分</Text>
+        </View>
+      </View>
+
+      <View className="user-actions">
+        <Button onClick={handleRefresh}>
+          刷新信息
+        </Button>
+        <Button type="danger" onClick={handleLogout}>
+          退出登录
+        </Button>
+      </View>
+    </View>
+  );
+};
+
+export default UserProfile;