main主干首次提交，包含用户认证模块

src/main/java/com/labelsys/backend/mapper/SysUserMapper.java

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+package com.labelsys.backend.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.labelsys.backend.entity.SysUser;
+import com.labelsys.backend.enums.UserPosition;
+import com.labelsys.backend.enums.UserRole;
+import com.labelsys.backend.enums.UserStatus;
+import java.util.List;
+import org.apache.ibatis.annotations.Param;
+
+public interface SysUserMapper extends BaseMapper<SysUser> {
+
+    int insert(SysUser user);
+
+    SysUser findById(@Param("id") Long id);
+
+    SysUser findByIdAndCompanyId(@Param("id") Long id, @Param("companyId") Long companyId);
+
+    SysUser findByCompanyIdAndPhone(@Param("companyId") Long companyId, @Param("phone") String phone);
+
+    List<SysUser> listByCompanyId(@Param("companyId") Long companyId);
+
+    List<SysUser> listCompanyAdmins(@Param("companyId") Long companyId);
+
+    int updatePassword(
+        @Param("id") Long id,
+        @Param("companyId") Long companyId,
+        @Param("passwordHash") String passwordHash,
+        @Param("mustChangePassword") boolean mustChangePassword
+    );
+
+    int updateAssignment(
+        @Param("id") Long id,
+        @Param("companyId") Long companyId,
+        @Param("role") UserRole role,
+        @Param("position") UserPosition position
+    );
+
+    int updateStatus(@Param("id") Long id, @Param("companyId") Long companyId, @Param("status") UserStatus status);
+
+    int bumpSessionVersion(@Param("id") Long id, @Param("companyId") Long companyId);
+
+    void deleteAll();
+}