first version

web/api/purchase/order.ts

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+import createAxios from '@/utils/request';
+import type {
+  ExportFormat,
+  IAllocationResult,
+  IPurchaseOrderItem,
+  PurchaseExportType,
+} from '@/domain/iPurchaseOrder.ts';
+import { downloadBlob } from '@/api/common/download.ts';
+
+export interface PurchaseItemUpdateParams {
+  product_name?: string;
+  product_spec?: string;
+  price: number | string;
+  quantity: number | string;
+  weight?: number | string;
+  remark?: string;
+}
+
+/** C1 按门店订单汇总生成采购单 */
+export async function generatePurchase(purchase_date: string) {
+  return createAxios<{ id: number; purchase_no: string }>({
+    url: '/purchase/order/generate',
+    method: 'post',
+    data: { purchase_date },
+  });
+}
+
+/** C2/C3 导出采购单（blob 下载） */
+export async function exportPurchase(id: number, type: PurchaseExportType, format: ExportFormat) {
+  return downloadBlob(
+    `/purchase/order/${id}/export`,
+    { type, format },
+    `采购单_${id}.${format}`
+  );
+}
+
+/** C4 修改采购明细（amount 由后端重算） */
+export async function updatePurchaseItem(id: number, data: PurchaseItemUpdateParams) {
+  return createAxios<{ amount: string }>({
+    url: `/purchase/order/item/${id}`,
+    method: 'put',
+    data,
+  });
+}
+
+/** C5/C6 明细发送供应商 */
+export async function sendPurchaseItem(id: number) {
+  return createAxios({
+    url: `/purchase/order/item/${id}/send`,
+    method: 'put',
+  });
+}
+
+/** D3 执行金额分摊 */
+export async function allocatePurchase(id: number) {
+  return createAxios<{ count: number }>({
+    url: `/purchase/order/${id}/allocate`,
+    method: 'post',
+  });
+}
+
+/** 分摊结果（按门店 / 按商品聚合） */
+export async function getAllocation(id: number) {
+  return createAxios<IAllocationResult>({
+    url: `/purchase/order/${id}/allocation`,
+    method: 'get',
+  });
+}
+
+export type { IPurchaseOrderItem };