fix: 添加报名性别限制校验

- 单人报名时校验选手性别是否符合项目要求
- 集体报名时校验队伍成员性别是否符合项目要求
- category=1 男子组只允许男性报名
- category=2 女子组只允许女性报名

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/main/java/org/springblade/modules/martial/controller/MartialRegistrationOrderController.java

@@ -300,6 +300,66 @@ public class MartialRegistrationOrderController extends BladeController {
 		List<Long> teamIds = Func.toLongList(dto.getTeamIds());
 		List<Long> projectIds = Func.toLongList(dto.getProjectIds());
 		
+		// Validate gender restriction for each project
+		for (Long projectId : projectIds) {
+			MartialProject project = projectService.getById(projectId);
+			if (project == null) {
+				continue;
+			}
+			
+			String category = project.getCategory();
+			if (category == null) {
+				continue;
+			}
+			
+			// For individual registration, check athlete gender
+			if (teamIds.isEmpty() && !athleteIds.isEmpty()) {
+				for (Long athleteId : athleteIds) {
+					MartialAthlete athlete = athleteService.getById(athleteId);
+					if (athlete == null) {
+						continue;
+					}
+					
+					Integer gender = athlete.getGender();
+					if ("1".equals(category) && gender != null && gender != 1) {
+						return R.fail("项目【" + project.getProjectName() + "】为男子组，不允许女性选手报名");
+					} else if ("2".equals(category) && gender != null && gender != 2) {
+						return R.fail("项目【" + project.getProjectName() + "】为女子组，不允许男性选手报名");
+					}
+				}
+			}
+			
+			// For team registration, check team members gender
+			if (!teamIds.isEmpty()) {
+				for (Long teamId : teamIds) {
+					MartialTeam team = teamService.getById(teamId);
+					if (team == null) {
+						continue;
+					}
+					
+					// Query team members
+					LambdaQueryWrapper<MartialTeamMember> memberWrapper = new LambdaQueryWrapper<>();
+					memberWrapper.eq(MartialTeamMember::getTeamId, teamId)
+								 .eq(MartialTeamMember::getIsDeleted, 0);
+					List<MartialTeamMember> members = teamMemberMapper.selectList(memberWrapper);
+					
+					for (MartialTeamMember member : members) {
+						MartialAthlete memberAthlete = athleteService.getById(member.getAthleteId());
+						if (memberAthlete == null) {
+							continue;
+						}
+						
+						Integer gender = memberAthlete.getGender();
+						if ("1".equals(category) && gender != null && gender != 1) {
+							return R.fail("项目【" + project.getProjectName() + "】为男子组，队伍【" + team.getTeamName() + "】中存在女性成员，不允许报名");
+						} else if ("2".equals(category) && gender != null && gender != 2) {
+							return R.fail("项目【" + project.getProjectName() + "】为女子组，队伍【" + team.getTeamName() + "】中存在男性成员，不允许报名");
+						}
+					}
+				}
+			}
+		}
+		
 		// Determine if this is a team registration
 		boolean isTeamRegistration = !teamIds.isEmpty();