feat(auth): 新增 Apple 登录并集成 Sa-Token 鉴权

- AppleServiceImpl：返回完整用户信息并签发 Sa-Token
- 新增 KeyboardUser 实体、Mapper、Service，支持按 subjectId 查询与创建
- GlobalExceptionHandler 统一处理 Sa-Token 未登录异常
- 补充 APPLE_LOGIN_ERROR 等错误码
- 配置文件增加 Sa-Token 相关参数

src/main/java/com/yolo/keyborad/mapper/I18nMessageMapper.java

@@ -5,15 +5,16 @@ package com.yolo.keyborad.mapper;
 * @date: 2025/12/1 20:40
 */
 
-import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.yolo.keyborad.model.entity.I18nMessage;
 import org.apache.ibatis.annotations.Param;
-import org.apache.ibatis.annotations.Select;
+
 
 
 import java.util.List;
 
-public interface I18nMessageMapper {
+public interface I18nMessageMapper extends BaseMapper<I18nMessage> {
 
     List<I18nMessage> selectByCodeAndLocale(@Param("code") String code, @Param("locale") String locale);
 }

src/main/java/com/yolo/keyborad/mapper/KeyboardUserMapper.java

@@ -0,0 +1,12 @@
+package com.yolo.keyborad.mapper;
+
+/*
+ * @author: ziin
+ * @date: 2025/12/2 18:10
+ */
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.yolo.keyborad.model.entity.KeyboardUser;
+
+public interface KeyboardUserMapper extends BaseMapper<KeyboardUser> {
+}