fix(#613): 医嘱退回流程完善 — 前端退回原因必填弹窗 + 后端存储退回原因

根因（全链路6环分析）：
- ① 前端/页面 ❌ handleCancel() 直接调 API，无退回原因输入弹窗
- ② Controller ❌ 不涉及 backReason — 纯转发，无需修改
- ③ Service ❌ adviceReject() 从 DTO 读取 list 但不提取 backReason，硬编码传 null
- ④ Mapper/DB ❌ backReason 参数已就绪但上游传 null 导致不写入
- ⑤ 医生端 ❌ 因 DB 无数据，无法展示退回原因

修复：
- 前端: handleCancel() 改为弹对话框,新增 confirmCancel() 校验必填后传 backReason
- 后端: adviceReject() 从 PerformInfoDto 提取 backReason 传给 updateDraftStatus/updateDraftStatusBatch

全链路状态流转：
护士选医嘱 → 点退回 → 弹窗要求输入原因 → 确定 → API传backReason → DB保存 → 医生端可显示

openhis-server-new/openhis-application/src/main/java/com/openhis/web/inhospitalnursestation/appservice/impl/AdviceProcessAppServiceImpl.java

@@ -58,6 +58,7 @@ import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
 import java.util.*;
+import java.util.Objects;
 import java.util.stream.Collectors;
 
 /**
@@ -413,15 +414,21 @@ public class AdviceProcessAppServiceImpl implements IAdviceProcessAppService {
         }
         Long practitionerId = SecurityUtils.getLoginUser().getPractitionerId();
         Date checkDate = new Date();
+        // 从请求中提取退回原因（所有项目共享同一原因）
+        String backReason = performInfoList.stream()
+                .map(PerformInfoDto::getBackReason)
+                .filter(Objects::nonNull)
+                .findFirst()
+                .orElse(null);
         if (!serviceRequestList.isEmpty()) {
             // 更新服务请求状态待发送
             serviceRequestService.updateDraftStatus(
-                    serviceRequestList.stream().map(PerformInfoDto::getRequestId).toList(), practitionerId, checkDate, null);
+                    serviceRequestList.stream().map(PerformInfoDto::getRequestId).toList(), practitionerId, checkDate, backReason);
         }
         if (!medRequestList.isEmpty()) {
             // 更新药品请求状态待发送
             medicationRequestService.updateDraftStatusBatch(
-                    medRequestList.stream().map(PerformInfoDto::getRequestId).toList(), practitionerId, checkDate, null);
+                    medRequestList.stream().map(PerformInfoDto::getRequestId).toList(), practitionerId, checkDate, backReason);
         }
         return R.ok(null, "退回成功");
     }

openhis-ui-vue3/src/views/inpatientNurse/medicalOrderProofread/components/prescriptionList.vue

@@ -226,6 +226,25 @@
       />
     </div>
   </div>
+  <!-- 退回原因弹窗 -->
+  <el-dialog v-model="backReasonVisible" title="退回原因" width="400px" :close-on-click-modal="false">
+    <el-form ref="backReasonFormRef" :model="backReasonForm" :rules="backReasonRules">
+      <el-form-item label="退回原因" prop="reason">
+        <el-input
+          v-model="backReasonForm.reason"
+          type="textarea"
+          :rows="4"
+          placeholder="请输入退回原因（必填）"
+          maxlength="500"
+          show-word-limit
+        />
+      </el-form-item>
+    </el-form>
+    <template #footer>
+      <el-button @click="backReasonVisible = false">取消</el-button>
+      <el-button type="primary" @click="confirmCancel">确定退回</el-button>
+    </template>
+  </el-dialog>
 </template>
 <script setup>
 import {ref, computed, getCurrentInstance} from 'vue';
@@ -238,6 +257,9 @@ const activeNames = ref([]);
 const prescriptionList = ref([]);
 const deadline = ref(formatDateStr(new Date(), 'YYYY-MM-DD') + ' 23:59:59');
 const type = ref(null);
+const backReasonVisible = ref(false);
+const backReasonForm = ref({ reason: '' });
+const backReasonFormRef = ref(null);
 const { proxy } = getCurrentInstance();
 const loading = ref(false);
 const chooseAll = ref(false);
@@ -444,18 +466,35 @@ function handleCancel() {
       proxy.$message.error('该药品已由药房发放，请先执行退药处理，不可直接退回');
       return;
     }
-    cancel(list).then((res) => {
-      if (res.code == 200) {
-        proxy.$modal.msgSuccess(res.msg);
-        handleGetPrescription();
-      }
-    });
-    console.log(list, 'list');
+    // 显示退回原因弹窗
+    backReasonForm.value.reason = '';
+    backReasonVisible.value = true;
   } else {
     proxy.$message.warning('请先选择医嘱信息');
   }
 }
 
+/** 确定退回 — 从弹窗获取原因后调用API */
+function confirmCancel() {
+  if (!backReasonForm.value.reason.trim()) {
+    proxy.$message.warning('请输入退回原因');
+    return;
+  }
+  let list = getSelectRows();
+  // 将退回原因附加到每个项目
+  let requestList = list.map(item => ({
+    ...item,
+    backReason: backReasonForm.value.reason.trim()
+  }));
+  cancel(requestList).then((res) => {
+    if (res.code == 200) {
+      proxy.$modal.msgSuccess(res.msg);
+      handleGetPrescription();
+    }
+  });
+  backReasonVisible.value = false;
+}
+
 function getSelectRows() {
   // 获取选中的医嘱信息
   let list = [];