fix(#574): 签到状态 BOOKED(1)→CHECKED_IN(3) + 全链路映射修复

根因：checkInTicket() 将签到后状态设为 BOOKED(1) 而非 CHECKED_IN(3)
导致：前端无法识别已签到状态，池统计漏计已签到人数

修复：
- TicketServiceImpl: 签到状态改为 SlotStatus.CHECKED_IN(3)
- TicketAppServiceImpl: 新增 CHECKED_IN→已签到 映射分支
- SchedulePoolMapper: 池统计兼容 BOOKED 和 CHECKED_IN
- outpatientAppointment/index.vue: STATUS_CLASS_MAP + 患者信息条件加上已签到
- AGENTS.md: 写入状态值一致性/禁止删文件/全链路验证铁律

openhis-server-new/openhis-application/src/main/java/com/openhis/web/appointmentmanage/appservice/impl/TicketAppServiceImpl.java

@@ -207,6 +207,12 @@ public class TicketAppServiceImpl implements ITicketAppService {
                             } else {
                                 dto.setStatus("已取号");
                             }
+                        } else if (status == SlotStatus.CHECKED_IN) {
+                            if (OrderStatus.PATIENT_CANCELLED.getValue().equals(raw.getOrderStatus())) {
+                                dto.setStatus("已退号");
+                            } else {
+                                dto.setStatus("已签到");
+                            }
                         } else if (status == SlotStatus.CANCELLED) {
                             dto.setStatus("已停诊");
                         } else if (status == SlotStatus.RETURNED) {
@@ -388,6 +394,12 @@ public class TicketAppServiceImpl implements ITicketAppService {
                             } else {
                                 dto.setStatus("已取号");
                             }
+                        } else if (status == SlotStatus.CHECKED_IN) {
+                            if (OrderStatus.PATIENT_CANCELLED.getValue().equals(raw.getOrderStatus())) {
+                                dto.setStatus("已退号");
+                            } else {
+                                dto.setStatus("已签到");
+                            }
                         } else if (status == SlotStatus.CANCELLED) {
                             dto.setStatus("已停诊");
                         } else if (status == SlotStatus.RETURNED) {