feat: 借库归还日期贯穿申请/审批/扫码借库；BOM 套餐添加与打印、缺货写入申请原因

inventory-web/src/views/borrow/approval/index.vue

@@ -76,6 +76,15 @@
         </template>
       </el-table-column>
 
+      <el-table-column label="归还期限" width="130" align="center">
+        <template #default="{ row }">
+          <span v-if="getReturnDeadline(row)" :style="row?.items?.[0]?.is_indefinite ? 'color:#E6A23C;font-weight:bold;' : ''">
+            {{ getReturnDeadline(row) }}
+          </span>
+          <span v-else style="color: #909399;">未填写</span>
+        </template>
+      </el-table-column>
+
       <el-table-column prop="created_at" label="申请时间" width="170" />
 
       <el-table-column label="状态" width="100" align="center">
@@ -219,6 +228,14 @@ const getApplicantName = (id: number | null) => {
   return userNameCache.value[id] ?? `用户 #${id}`
 }
 
+// 从申请单明细快照中读取归还期限（旧申请单无此字段时返回空串）
+const getReturnDeadline = (row: any) => {
+  const first = row?.items?.[0]
+  if (first?.is_indefinite) return '长期借用'
+  if (first?.expected_return_time) return first.expected_return_time
+  return ''
+}
+
 const getApproverName = (id: number | null) => {
   if (!id) return '-'
   return userNameCache.value[id] ?? `用户 #${id}`