fix(dispatch): preserve loading groups in atomic draft pre-arrangement

lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml

@@ -666,6 +666,17 @@ paths:
         content: { application/json: { schema: { $ref: '#/components/schemas/SmartDispatchPreArrange' } } }
       responses:
         '200': { description: 统一 ApiResponse 包装的预排车详情, content: { application/json: { schema: { $ref: '#/components/schemas/DispatchResponse' } } } }
+  /api/platform/v1/last-leg/dispatches/drafts/pre-arrange:
+    post:
+      summary: 按装车分组原子创建多张预排车单
+      description: 权限 platform:overseas-warehouse:inbound-order:smart-dispatch；核对当前操作人的完整非空草稿分组、真实来源、唯一客户和海外仓、托位容量。每个装车容器生成独立排车单和PDA任务；任一组失败整批回滚。相同分组再次提交返回对应原单，不能按同一草稿合并不同车辆。
+      security: [{ bearerAuth: [] }]
+      requestBody:
+        required: true
+        content: { application/json: { schema: { $ref: '#/components/schemas/SmartDispatchPreArrangeDraft' } } }
+      responses:
+        '200': { description: 统一ApiResponse包装的分组结果数组, content: { application/json: { schema: { type: array, items: { $ref: '#/components/schemas/SmartDispatchDraftGroupResult' } } } } }
+        '409': { description: 草稿归属、来源、容量或分组已变化，未部分创建 }
   /api/platform/v1/last-leg/dispatches/draft-locks/lock:
     post:
       summary: 将托盘移入智能排车草稿并立即锁定
@@ -2544,6 +2555,28 @@ components:
         returnReceiptId: { type: string, nullable: true, description: 退回实收来源ID，不作为计划托盘ID }
         returnReceiptNo: { type: string, nullable: true, description: 退回实收业务编号 }
         cartonMarks: { type: string, nullable: true, description: 该托盘箱号，逗号分隔 }
+    SmartDispatchPreArrangeDraft:
+      type: object
+      required: [draftToken, groups]
+      properties:
+        draftToken: { type: string, maxLength: 64 }
+        groups:
+          type: array
+          minItems: 1
+          maxItems: 100
+          items:
+            type: object
+            required: [draftContainerId, planPalletIds, returnReceiptIds]
+            properties:
+              draftContainerId: { type: integer, format: int64 }
+              planPalletIds: { type: array, maxItems: 500, items: { type: integer, format: int64 } }
+              returnReceiptIds: { type: array, maxItems: 500, items: { type: integer, format: int64 } }
+    SmartDispatchDraftGroupResult:
+      type: object
+      required: [draftContainerId, dispatch]
+      properties:
+        draftContainerId: { type: integer, format: int64 }
+        dispatch: { $ref: '#/components/schemas/DispatchResponse' }
     SmartDispatchPreArrange:
       type: object
       description: planPalletIds与returnReceiptIds是两类正式来源，合计至少一项且最多500项。退回来源仅接受实际入账生成的实收记录，不得用退回实收ID冒充计划托盘ID；同一实物托盘不可重复选择。