intigrate others sales , return and implement day end duntinalities

Frontend/erp-system/lib/api/sales-day-end.ts

@@ -0,0 +1,31 @@
+// Cashier day-end close-out (docs/14 Sales API). Preview shows what closing right now
+// would include (or the existing close, if already closed); close is the one-shot,
+// idempotent action that locks the day's Posted slips and posts the consolidated GL entry.
+import { apiRequest, buildQuery } from "@/lib/api-client"
+import { PagedResponse } from "@/types/common"
+import { CreateSalesDayEndRequest, SalesDayEnd, SalesDayEndPreview, SalesDayEndSummary } from "@/types/sales"
+
+export interface ListSalesDayEndsParams {
+  page?: number
+  pageSize?: number
+  cashierUserId?: number
+}
+
+export const salesDayEndApi = {
+  list(params: ListSalesDayEndsParams = {}): Promise<PagedResponse<SalesDayEndSummary>> {
+    return apiRequest<PagedResponse<SalesDayEndSummary>>(`/sales-day-end${buildQuery(params)}`)
+  },
+
+  get(salesDayEndId: number): Promise<SalesDayEnd> {
+    return apiRequest<SalesDayEnd>(`/sales-day-end/${salesDayEndId}`)
+  },
+
+  preview(cashierUserId: number, businessDate?: string): Promise<SalesDayEndPreview> {
+    return apiRequest<SalesDayEndPreview>(`/sales-day-end/preview${buildQuery({ cashierUserId, businessDate })}`)
+  },
+
+  /** Idempotent — closing an already-closed date replays the existing record. */
+  close(request: CreateSalesDayEndRequest): Promise<SalesDayEnd> {
+    return apiRequest<SalesDayEnd>("/sales-day-end", { method: "POST", body: request })
+  },
+}

Frontend/erp-system/lib/api/sales.ts

@@ -1,10 +1,12 @@
 import { apiRequest, apiRequestWithETag, buildQuery } from "@/lib/api-client"
 import { ApiResult, PagedResponse } from "@/types/common"
 import {
+  CreateSalesInvoicePaymentRequest,
   CreateSalesInvoiceRequest,
   CreateSalesSlipRequest,
   SalesInvoice,
   SalesInvoiceStatus,
+  SalesInvoicePayment,
   SalesInvoicePostingCheck,
   SalesInvoiceSummary,
   SalesListFilterParams,
@@ -65,6 +67,16 @@ export const salesApi = {
     return apiRequest<SalesInvoice>(`/sales-invoices/${salesInvoiceId}/cancel`, { method: "POST" })
   },
 
+  /** Pay the customer's balance against a posted invoice, in full or in installments. Posts a real GL journal entry. */
+  payInvoice(salesInvoiceId: number, request: CreateSalesInvoicePaymentRequest): Promise<SalesInvoicePayment> {
+    return apiRequest<SalesInvoicePayment>(`/sales-invoices/${salesInvoiceId}/payments`, { method: "POST", body: request })
+  },
+
+  /** Payment history for an invoice, newest first. */
+  listInvoicePayments(salesInvoiceId: number): Promise<SalesInvoicePayment[]> {
+    return apiRequest<SalesInvoicePayment[]>(`/sales-invoices/${salesInvoiceId}/payments`)
+  },
+
   listSlips(params: ListSalesSlipsParams = {}): Promise<PagedResponse<SalesSlipSummary>> {
     return apiRequest<PagedResponse<SalesSlipSummary>>(`/sales-slips${buildQuery(params)}`)
   },