chore(security): 引入AppletUserDetails类

- 在SecurityUtils.java中添加了对AppletUserDetails的import声明
- 准备支持小程序用户相关的安全功能扩展

src/main/java/com/zsElectric/boot/security/util/SecurityUtils.java

@@ -4,6 +4,7 @@ import cn.hutool.core.collection.CollectionUtil;
 import cn.hutool.core.util.StrUtil;
 import com.zsElectric.boot.common.constant.SecurityConstants;
 import com.zsElectric.boot.common.constant.SystemConstants;
+import com.zsElectric.boot.security.model.AppletUserDetails;
 import com.zsElectric.boot.security.model.SysUserDetails;
 import jakarta.servlet.http.HttpServletRequest;
 import org.springframework.http.HttpHeaders;