fix(team): 修复删除选手后集体信息未同步更新的问题

- 删除选手时级联删除集体成员关系
- 集体列表动态计算有效成员数（排除已删除选手）
- 集体详情过滤已删除的选手

src/main/java/org/springblade/modules/martial/service/impl/MartialAthleteServiceImpl.java

@@ -12,7 +12,9 @@ import org.springblade.modules.martial.mapper.MartialAthleteMapper;
 import org.springblade.modules.martial.pojo.entity.MartialJudgeInvite;
 import org.springblade.modules.martial.pojo.entity.MartialScheduleAthlete;
 import org.springblade.modules.martial.pojo.entity.MartialScore;
+import org.springblade.modules.martial.pojo.entity.MartialTeamMember;
 import org.springblade.modules.martial.pojo.vo.MartialAthleteVO;
+import org.springblade.modules.martial.mapper.MartialTeamMemberMapper;
 import org.springblade.modules.martial.pojo.vo.MiniAthleteAdminVO;
 import org.springblade.modules.martial.pojo.vo.MiniAthleteScoreVO;
 import org.springblade.modules.martial.service.IMartialAthleteService;
@@ -24,6 +26,8 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
+import java.io.Serializable;
+import java.util.Collection;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -45,6 +49,9 @@ public class MartialAthleteServiceImpl extends ServiceImpl<MartialAthleteMapper,
 	@Autowired
 	private IMartialJudgeInviteService judgeInviteService;
 
+
+	@Autowired
+	private MartialTeamMemberMapper teamMemberMapper;
 	/**
 	 * 分页查询参赛选手（包含关联字段）
 	 *
@@ -57,6 +64,24 @@ public class MartialAthleteServiceImpl extends ServiceImpl<MartialAthleteMapper,
 		return baseMapper.selectAthleteVOPage(page, athlete);
 	}
 
+	/**
+	 * Override removeByIds to cascade delete team member relations
+	 */
+	@Override
+	@Transactional(rollbackFor = Exception.class)
+	public boolean removeByIds(Collection<?> idList) {
+		if (idList != null && !idList.isEmpty()) {
+			// Delete team member relations for these athletes
+			for (Object id : idList) {
+				LambdaQueryWrapper<MartialTeamMember> wrapper = new LambdaQueryWrapper<>();
+				wrapper.eq(MartialTeamMember::getAthleteId, id);
+				teamMemberMapper.delete(wrapper);
+				log.info("Deleted team member relations for athlete: {}", id);
+			}
+		}
+		return super.removeByIds(idList);
+	}
+
 	/**
 	 * Task 2.1: 运动员签到检录
 	 *

src/main/java/org/springblade/modules/martial/service/impl/MartialTeamServiceImpl.java

@@ -73,6 +73,9 @@ public class MartialTeamServiceImpl extends ServiceImpl<MartialTeamMapper, Marti
 				.map(team -> {
 					MartialTeamVO vo = new MartialTeamVO();
 					BeanUtils.copyProperties(team, vo);
+					// Calculate actual member count (excluding deleted athletes)
+					int actualMemberCount = getActualMemberCount(team.getId());
+					vo.setMemberCount(actualMemberCount);
 					return vo;
 				})
 				.collect(Collectors.toList());
@@ -81,6 +84,29 @@ public class MartialTeamServiceImpl extends ServiceImpl<MartialTeamMapper, Marti
 		return voPage;
 	}
 
+	/**
+	 * Get actual member count excluding deleted athletes
+	 */
+	private int getActualMemberCount(Long teamId) {
+		LambdaQueryWrapper<MartialTeamMember> memberWrapper = new LambdaQueryWrapper<>();
+		memberWrapper.eq(MartialTeamMember::getTeamId, teamId);
+		memberWrapper.eq(MartialTeamMember::getIsDeleted, 0);
+		List<MartialTeamMember> members = teamMemberMapper.selectList(memberWrapper);
+		
+		if (members.isEmpty()) {
+			return 0;
+		}
+		
+		List<Long> athleteIds = members.stream()
+				.map(MartialTeamMember::getAthleteId)
+				.collect(Collectors.toList());
+		
+		LambdaQueryWrapper<MartialAthlete> athleteWrapper = new LambdaQueryWrapper<>();
+		athleteWrapper.in(MartialAthlete::getId, athleteIds);
+		athleteWrapper.eq(MartialAthlete::getIsDeleted, 0);
+		return (int) athleteService.count(athleteWrapper);
+	}
+
 	@Override
 	public MartialTeamVO getTeamDetail(Long id) {
 		MartialTeam team = this.getById(id);
@@ -102,7 +128,10 @@ public class MartialTeamServiceImpl extends ServiceImpl<MartialTeamMapper, Marti
 					.map(MartialTeamMember::getAthleteId)
 					.collect(Collectors.toList());
 			
-			List<MartialAthlete> athletes = athleteService.listByIds(athleteIds);
+			LambdaQueryWrapper<MartialAthlete> athleteWrapper = new LambdaQueryWrapper<>();
+			athleteWrapper.in(MartialAthlete::getId, athleteIds);
+			athleteWrapper.eq(MartialAthlete::getIsDeleted, 0);
+			List<MartialAthlete> athletes = athleteService.list(athleteWrapper);
 			Map<Long, MartialAthlete> athleteMap = athletes.stream()
 					.collect(Collectors.toMap(MartialAthlete::getId, a -> a));