feat(pos): POS v2 feature parity + promote to default /pos

Completes the four POS v2 roadmap items:

1. Real split payments — split tab records N separate payment rows (equal split,
   last row takes the remainder), each row toggles Cash/Card; posts payments[].
2. Card-terminal push — confirmPay sums Card amounts and calls requestPosPayment
   (POS device) before recording; surfaces POS_DEVICE_* errors.
3. Customer + coupons + loyalty — reuses PosCustomerPicker (attach/search/create)
   and validates coupons via /coupons/validate (discount in totals). Pay sheet
   offers loyalty redemption (1 point = 100 toman) when a customer is attached.
4. Promote to default — /pos now renders POS v2 (full-screen, café-themed); the
   classic terminal moves to /pos-classic with its sidebar+topbar chrome. The
   "نسخه کلاسیک" link points there.

Order submission already carried customerId/guestName/guestPhone/couponId via the
shared cart store, so customer + coupon flow straight through send + pay.
tsc --noEmit clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/dashboard/src/app/[locale]/(fullscreen)/pos-classic/layout.tsx

@@ -0,0 +1,50 @@
+"use client";
+
+import { useLocale } from "next-intl";
+import { Sidebar } from "@/components/layout/sidebar";
+import { Topbar } from "@/components/layout/topbar";
+import { CafeThemeProvider } from "@/components/theme/cafe-theme-provider";
+
+/**
+ * Classic POS route layout — wraps the terminal in the standard dashboard
+ * chrome (collapsible sidebar + topbar) but keeps the main content area
+ * overflow-hidden so PosScreen can manage its own internal scrolling.
+ */
+export default function PosClassicLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  const locale = useLocale();
+  const isRtl = locale !== "en";
+
+  const mainColumn = (
+    <div className="flex min-h-0 min-w-0 flex-1 flex-col">
+      <Topbar />
+      <main className="min-h-0 flex-1 overflow-hidden bg-background p-3 md:p-4">
+        {children}
+      </main>
+    </div>
+  );
+
+  return (
+    <CafeThemeProvider>
+      <div
+        className="flex h-screen min-h-0 overflow-hidden bg-background"
+        dir={isRtl ? "rtl" : "ltr"}
+      >
+        {isRtl ? (
+          <>
+            <Sidebar side="right" />
+            {mainColumn}
+          </>
+        ) : (
+          <>
+            <Sidebar side="left" />
+            {mainColumn}
+          </>
+        )}
+      </div>
+    </CafeThemeProvider>
+  );
+}

web/dashboard/src/app/[locale]/(fullscreen)/pos-classic/page.tsx

@@ -0,0 +1,12 @@
+import { Suspense } from "react";
+import { PosScreen } from "@/components/pos/pos-screen";
+
+/** Classic POS terminal — chrome (sidebar + topbar) is provided by layout.tsx.
+ *  Kept as a fallback while POS v2 (at /pos) is piloted. */
+export default function PosClassicPage() {
+  return (
+    <Suspense fallback={null}>
+      <PosScreen />
+    </Suspense>
+  );
+}

web/dashboard/src/app/[locale]/(fullscreen)/pos/layout.tsx

@@ -1,50 +1,13 @@
 "use client";
 
-import { useLocale } from "next-intl";
-import { Sidebar } from "@/components/layout/sidebar";
-import { Topbar } from "@/components/layout/topbar";
 import { CafeThemeProvider } from "@/components/theme/cafe-theme-provider";
 
 /**
- * POS route layout — wraps the terminal in the standard dashboard chrome
- * (collapsible sidebar + topbar) but keeps the main content area
- * overflow-hidden so PosScreen can manage its own internal scrolling.
+ * POS v2 layout — the redesigned terminal is full-screen (its own topbar +
+ * order ticket), so no dashboard sidebar/topbar chrome here. Café theming
+ * still applies. Auth guarding comes from the parent (fullscreen) layout.
+ * The classic POS keeps its chrome under /pos-classic.
  */
-export default function PosLayout({
-  children,
-}: {
-  children: React.ReactNode;
-}) {
-  const locale = useLocale();
-  const isRtl = locale !== "en";
-
-  const mainColumn = (
-    <div className="flex min-h-0 min-w-0 flex-1 flex-col">
-      <Topbar />
-      <main className="min-h-0 flex-1 overflow-hidden bg-background p-3 md:p-4">
-        {children}
-      </main>
-    </div>
-  );
-
-  return (
-    <CafeThemeProvider>
-      <div
-        className="flex h-screen min-h-0 overflow-hidden bg-background"
-        dir={isRtl ? "rtl" : "ltr"}
-      >
-        {isRtl ? (
-          <>
-            <Sidebar side="right" />
-            {mainColumn}
-          </>
-        ) : (
-          <>
-            <Sidebar side="left" />
-            {mainColumn}
-          </>
-        )}
-      </div>
-    </CafeThemeProvider>
-  );
+export default function PosLayout({ children }: { children: React.ReactNode }) {
+  return <CafeThemeProvider>{children}</CafeThemeProvider>;
 }

web/dashboard/src/app/[locale]/(fullscreen)/pos/page.tsx

@@ -1,11 +1,8 @@
-import { Suspense } from "react";
-import { PosScreen } from "@/components/pos/pos-screen";
+import { Pos2Screen } from "@/components/pos2/pos2-screen";
 
-/** POS terminal — chrome (sidebar + topbar) is provided by layout.tsx */
+/** Default POS terminal — redesigned v2, wired to live data (menu, tables,
+ *  orders, payments) via the shared cart store + offline submit pipeline.
+ *  The classic POS remains available at /[locale]/pos-classic. */
 export default function PosPage() {
-  return (
-    <Suspense fallback={null}>
-      <PosScreen />
-    </Suspense>
-  );
+  return <Pos2Screen />;
 }

web/dashboard/src/components/pos2/pos2-screen.tsx

@@ -4,15 +4,16 @@
 // POS v2 — WIRED to live data. Reuses the existing data layer + cart store +
 // submit/payment endpoints (shares React Query cache with the classic POS).
 // Flow: table board → order screen → pay sheet → back to board.
-// Mounted at /[locale]/pos2. Design mirrors components/pos2/pos2-prototype.tsx.
+// Mounted at /[locale]/pos (and /pos2). Design mirrors pos2-prototype.tsx.
 // ─────────────────────────────────────────────────────────────────────────────
 
 import { useEffect, useMemo, useState } from "react";
-import { useQueryClient } from "@tanstack/react-query";
+import { useMutation, useQueryClient } from "@tanstack/react-query";
 import {
   Search, Plus, Minus, Trash2, Send, CreditCard, Pause, SplitSquareHorizontal,
   X, WifiOff, ShoppingCart, Users, Coffee, ArrowRight, LayoutGrid, Armchair,
   Banknote, Check, Delete, ReceiptText, ShoppingBag, Loader2, RotateCcw,
+  BadgePercent, Sparkles,
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { notify } from "@/lib/notify";
@@ -22,13 +23,42 @@ import { useBranchStore } from "@/lib/stores/branch.store";
 import { useCartStore } from "@/lib/stores/cart.store";
 import { apiGet, apiPost, ApiClientError } from "@/lib/api/client";
 import { submitOrderToApi, orderAmountDue, isLocalOrder } from "@/lib/pos/submit-order";
-import type { MenuItem, Order, TableBoardItem } from "@/lib/api/types";
+import { requestPosPayment, posDeviceErrorMessage } from "@/lib/api/pos-device";
+import { PosCustomerPicker } from "@/components/pos/pos-customer-picker";
+import type { Customer, MenuItem, Order, TableBoardItem } from "@/lib/api/types";
 import { usePos2Categories, usePos2Menu, usePos2Tables, useMenuById } from "@/lib/pos2/use-pos2";
 
 const fmt = (n: number) => Math.round(n).toLocaleString("fa-IR");
 const TAX = 0.09;
+const POINT_VALUE = 100; // 1 loyalty point = 100 toman (matches classic POS)
+type Method = "Cash" | "Card" | "Credit";
+type Payment = { method: Method; amount: number };
+
 const errMsg = (e: unknown, fb: string) => (e instanceof ApiClientError ? e.message || fb : fb);
 
+const COUPON_FA: Record<string, string> = {
+  COUPON_NOT_FOUND: "کد تخفیف نامعتبر است",
+  COUPON_INACTIVE: "کد تخفیف غیرفعال است",
+  COUPON_EXPIRED: "کد تخفیف منقضی شده است",
+  COUPON_NOT_STARTED: "کد تخفیف هنوز فعال نشده است",
+  COUPON_LIMIT_REACHED: "سقف استفاده از این کد پر شده است",
+  COUPON_MIN_ORDER: "حداقل مبلغ سفارش رعایت نشده است",
+  CART_EMPTY: "سبد خالی است",
+  COUPON_REQUIRED: "کد تخفیف را وارد کنید",
+  COUPON_NO_DISCOUNT: "کد تخفیف نامعتبر است",
+};
+const couponErr = (e: unknown) =>
+  e instanceof ApiClientError ? COUPON_FA[e.code] ?? "کد تخفیف نامعتبر است" : "کد تخفیف نامعتبر است";
+
+const POS_DEVICE_FA: Record<string, string> = {
+  posDeviceNotConfigured: "دستگاه کارت‌خوان تنظیم نشده است",
+  posDeviceConnectionFailed: "اتصال به کارت‌خوان ناموفق بود",
+  posDeviceTimeout: "زمان پاسخ کارت‌خوان به پایان رسید",
+  posDeviceRejected: "تراکنش توسط کارت‌خوان رد شد",
+  posDeviceError: "خطای کارت‌خوان",
+};
+const posDeviceMsg = (e: unknown) => posDeviceErrorMessage(e, (k) => POS_DEVICE_FA[k] ?? "خطای کارت‌خوان");
+
 export function Pos2Screen() {
   const router = useRouter();
   const queryClient = useQueryClient();
@@ -48,10 +78,10 @@ export function Pos2Screen() {
   const removeItem = useCartStore((s) => s.removeItem);
   const setTableId = useCartStore((s) => s.setTableId);
   const setOrderType = useCartStore((s) => s.setOrderType);
-  const setActiveOrderId = useCartStore((s) => s.setActiveOrderId);
   const hydrateFromOrder = useCartStore((s) => s.hydrateFromOrder);
   const clearSession = useCartStore((s) => s.clearSession);
   const activeOrderNo = useCartStore((s) => s.activeOrderDisplayNumber);
+  const appliedCoupon = useCartStore((s) => s.appliedCoupon);
 
   // local view state
   const [view, setView] = useState<"board" | "order">("board");
@@ -62,6 +92,7 @@ export function Pos2Screen() {
   const [cartOpen, setCartOpen] = useState(false);
   const [busy, setBusy] = useState(false);
   const [payTarget, setPayTarget] = useState<Order | null>(null);
+  const [payLoyalty, setPayLoyalty] = useState(0);
 
   const [online, setOnline] = useState(true);
   useEffect(() => {
@@ -74,8 +105,10 @@ export function Pos2Screen() {
 
   const live = items.filter((l) => !l.isVoided);
   const subtotal = live.reduce((s, l) => s + l.menuItem.price * l.quantity, 0);
-  const tax = Math.round(subtotal * TAX);
-  const total = subtotal + tax;
+  const discount = appliedCoupon?.discountAmount ?? 0;
+  const taxable = Math.max(0, subtotal - discount);
+  const tax = Math.round(taxable * TAX);
+  const total = taxable + tax;
   const count = live.reduce((s, l) => s + l.quantity, 0);
   const pendingCount = items.reduce(
     (n, l) => n + Math.max(0, l.quantity - (syncedQty[l.menuItem.id] ?? 0)),
@@ -183,17 +216,26 @@ export function Pos2Screen() {
         }
       }
       if (!order) {
-        // offline/local order — pay against the optimistic total
         const cart = useCartStore.getState();
         order = {
           id: cart.activeOrderId ?? "local_pending",
           cafeId: cafeId as string,
           orderType: "DineIn", status: "Open",
-          subtotal, taxTotal: tax, discountAmount: 0, total,
+          subtotal, taxTotal: tax, discountAmount: discount, total,
           paidAmount: 0, createdAt: new Date().toISOString(), displayNumber: 0,
           items: [], payments: [],
         };
       }
+      // loyalty points available on the attached customer (1 pt = 100 toman)
+      const customerId = useCartStore.getState().customerId;
+      let pts = 0;
+      if (customerId && !isLocalOrder(order.id)) {
+        try {
+          const c = await apiGet<Customer>(`/api/cafes/${cafeId}/customers/${customerId}`);
+          pts = c.loyaltyPoints ?? 0;
+        } catch { pts = 0; }
+      }
+      setPayLoyalty(pts);
       setPayTarget(order);
     } catch (e) {
       notify.error(errMsg(e, "آماده‌سازی پرداخت ناموفق بود"));
@@ -202,19 +244,33 @@ export function Pos2Screen() {
     }
   };
 
-  const confirmPay = async (method: "Cash" | "Card", amount: number) => {
+  const confirmPay = async (payments: Payment[], loyaltyRedeem: number) => {
     if (!payTarget) return;
     setBusy(true);
     try {
+      const cardTotal = payments.filter((p) => p.method === "Card").reduce((s, p) => s + p.amount, 0);
+      const payBranchId = payTarget.branchId ?? branchId ?? undefined;
+      if (cardTotal > 0 && payBranchId) {
+        // push the card amount to the configured terminal (no-op/skip if none)
+        await requestPosPayment(cafeId as string, payBranchId, payTarget.id, cardTotal);
+      }
       await apiPost(`/api/cafes/${cafeId}/orders/${payTarget.id}/payments`, {
-        payments: [{ method, amount }],
+        payments,
+        loyaltyPointsToRedeem: loyaltyRedeem > 0 ? loyaltyRedeem : undefined,
       });
-      notify.success(`پرداخت ${fmt(amount)} تومان ثبت شد`);
+      const paid = payments.reduce((s, p) => s + p.amount, 0);
+      notify.success(`پرداخت ${fmt(paid)} تومان ثبت شد`);
       queryClient.invalidateQueries({ queryKey: ["tables-board", cafeId] });
       queryClient.invalidateQueries({ queryKey: ["orders-open", cafeId] });
       backToBoard();
     } catch (e) {
-      notify.error(errMsg(e, "ثبت پرداخت ناموفق بود"));
+      if (e instanceof ApiClientError && e.code.startsWith("POS_DEVICE")) {
+        notify.error(posDeviceMsg(e));
+      } else if (e instanceof ApiClientError && e.code === "NO_OPEN_SHIFT") {
+        notify.error("برای پرداخت باید شیفت باز باشد");
+      } else {
+        notify.error(errMsg(e, "ثبت پرداخت ناموفق بود"));
+      }
     } finally {
       setBusy(false);
     }
@@ -235,6 +291,12 @@ export function Pos2Screen() {
     </span>
   );
 
+  const ticketProps = {
+    cafeId, lines: live, subtotal, discount, tax, total, count, pendingCount,
+    onBump: (id: string, d: number) => { const l = items.find((x) => x.menuItem.id === id); if (l) updateQty(id, l.quantity + d); },
+    onRemove: removeItem, onSend: send, onPay: openPay, onSplit: openPay,
+  };
+
   // ── TABLE BOARD ────────────────────────────────────────────────────────────
   if (view === "board") {
     const list = tables ?? [];
@@ -254,7 +316,7 @@ export function Pos2Screen() {
           {offlineBadge}
           <button
             type="button"
-            onClick={() => router.push("/pos")}
+            onClick={() => router.push("/pos-classic")}
             className="hidden min-h-[40px] cursor-pointer items-center gap-1.5 rounded-xl px-3 text-sm font-medium text-muted-foreground transition-colors hover:bg-accent sm:flex"
           >
             <RotateCcw className="size-4" /> نسخه کلاسیک
@@ -318,7 +380,7 @@ export function Pos2Screen() {
                       <span className="text-sm font-extrabold text-primary">{fmt(t.currentOrder?.total ?? 0)}</span>
                     </div>
                   ) : (
-                    <span className={cn("text-sm font-medium", reserved ? "text-amber-700" : cleaning ? "text-muted-foreground" : "text-muted-foreground")}>
+                    <span className={cn("text-sm font-medium", reserved ? "text-amber-700" : "text-muted-foreground")}>
                       {reserved ? "رزرو" : cleaning ? "در حال تمیزکاری" : "خالی"}
                     </span>
                   )}
@@ -411,13 +473,8 @@ export function Pos2Screen() {
           )}
         </main>
 
-        <aside className="hidden w-[360px] shrink-0 border-s border-border bg-card lg:flex lg:flex-col">
-          <Ticket
-            lines={live} subtotal={subtotal} tax={tax} total={total} count={count}
-            pendingCount={pendingCount}
-            onBump={(id, d) => { const l = items.find((x) => x.menuItem.id === id); if (l) updateQty(id, l.quantity + d); }}
-            onRemove={removeItem} onSend={send} onPay={openPay} onSplit={openPay}
-          />
+        <aside className="hidden w-[380px] shrink-0 border-s border-border bg-card lg:flex lg:flex-col">
+          <Ticket {...ticketProps} />
         </aside>
       </div>
 
@@ -446,12 +503,7 @@ export function Pos2Screen() {
                 <X className="size-5" />
               </button>
             </div>
-            <Ticket
-              lines={live} subtotal={subtotal} tax={tax} total={total} count={count}
-              pendingCount={pendingCount}
-              onBump={(id, d) => { const l = items.find((x) => x.menuItem.id === id); if (l) updateQty(id, l.quantity + d); }}
-              onRemove={removeItem} onSend={send} onPay={openPay} onSplit={openPay}
-            />
+            <Ticket {...ticketProps} />
           </div>
         </div>
       )}
@@ -460,6 +512,7 @@ export function Pos2Screen() {
         <Pos2PaySheet
           tableName={title}
           amountDue={orderAmountDue(payTarget) || total}
+          loyaltyPoints={payLoyalty}
           onClose={() => setPayTarget(null)}
           onConfirm={confirmPay}
         />
@@ -468,12 +521,94 @@ export function Pos2Screen() {
   );
 }
 
+// ── Customer + coupon controls (self-contained: reads/writes the cart store) ──
+function Pos2Extras({ cafeId }: { cafeId: string }) {
+  const guestName = useCartStore((s) => s.guestName);
+  const guestPhone = useCartStore((s) => s.guestPhone);
+  const customerId = useCartStore((s) => s.customerId);
+  const setGuestName = useCartStore((s) => s.setGuestName);
+  const setGuestPhone = useCartStore((s) => s.setGuestPhone);
+  const setCustomer = useCartStore((s) => s.setCustomer);
+  const clearCustomer = useCartStore((s) => s.clearCustomer);
+  const couponCode = useCartStore((s) => s.couponCode);
+  const appliedCoupon = useCartStore((s) => s.appliedCoupon);
+  const setCouponCode = useCartStore((s) => s.setCouponCode);
+  const setAppliedCoupon = useCartStore((s) => s.setAppliedCoupon);
+  const clearCoupon = useCartStore((s) => s.clearCoupon);
+  const subtotalFn = useCartStore((s) => s.subtotal);
+  const [msg, setMsg] = useState<string | null>(null);
+
+  const apply = useMutation({
+    mutationFn: () =>
+      apiPost<{ couponId: string; code: string; discountAmount: number }>(
+        `/api/cafes/${cafeId}/coupons/validate`,
+        { code: couponCode.trim(), subtotal: subtotalFn() },
+      ),
+    onSuccess: (d) => {
+      setAppliedCoupon({ id: d.couponId, code: d.code, discountAmount: d.discountAmount });
+      setMsg(null);
+    },
+    onError: (e) => { setAppliedCoupon(null); setMsg(couponErr(e)); },
+  });
+
+  return (
+    <div className="shrink-0 space-y-2 border-t border-border px-3 py-2">
+      <PosCustomerPicker
+        cafeId={cafeId}
+        guestName={guestName}
+        guestPhone={guestPhone}
+        customerId={customerId}
+        onGuestNameChange={setGuestName}
+        onGuestPhoneChange={setGuestPhone}
+        onCustomerChange={setCustomer}
+        onClearCustomer={clearCustomer}
+        compact
+      />
+
+      {appliedCoupon ? (
+        <div className="flex items-center justify-between gap-2 rounded-lg border border-emerald-300 bg-emerald-50 px-2.5 py-2 text-sm">
+          <span className="flex items-center gap-1.5 font-medium text-emerald-700">
+            <BadgePercent className="size-4" /> {appliedCoupon.code}
+            <span className="text-xs text-emerald-600">(−{fmt(appliedCoupon.discountAmount)})</span>
+          </span>
+          <button type="button" onClick={() => { clearCoupon(); setMsg(null); }} className="rounded-md p-1 text-emerald-700 hover:bg-emerald-100" aria-label="حذف کوپن">
+            <X className="size-4" />
+          </button>
+        </div>
+      ) : (
+        <div className="flex items-center gap-2">
+          <div className="relative flex-1">
+            <BadgePercent className="pointer-events-none absolute end-2.5 top-1/2 size-4 -translate-y-1/2 text-muted-foreground" />
+            <input
+              value={couponCode}
+              onChange={(e) => { setCouponCode(e.target.value); setMsg(null); }}
+              onKeyDown={(e) => { if (e.key === "Enter" && couponCode.trim() && !apply.isPending) apply.mutate(); }}
+              placeholder="کد تخفیف"
+              className="h-10 w-full rounded-lg border border-border bg-background pe-8 ps-3 text-sm outline-none focus:ring-2 focus:ring-primary/40"
+            />
+          </div>
+          <button
+            type="button"
+            disabled={!couponCode.trim() || apply.isPending}
+            onClick={() => apply.mutate()}
+            className="flex h-10 min-w-[64px] items-center justify-center rounded-lg bg-muted px-3 text-sm font-medium hover:bg-accent disabled:opacity-40"
+          >
+            {apply.isPending ? <Loader2 className="size-4 animate-spin" /> : "اعمال"}
+          </button>
+        </div>
+      )}
+      {msg ? <p className="text-xs text-red-500">{msg}</p> : null}
+    </div>
+  );
+}
+
 // ── Order ticket ─────────────────────────────────────────────────────────────
 type TicketLine = { menuItem: MenuItem; quantity: number };
 function Ticket({
-  lines, subtotal, tax, total, count, pendingCount, onBump, onRemove, onSend, onPay, onSplit,
+  cafeId, lines, subtotal, discount, tax, total, count, pendingCount, onBump, onRemove, onSend, onPay, onSplit,
 }: {
-  lines: TicketLine[]; subtotal: number; tax: number; total: number; count: number; pendingCount: number;
+  cafeId: string; lines: TicketLine[]; subtotal: number; discount: number; tax: number; total: number;
+  count: number; pendingCount: number;
   onBump: (id: string, d: number) => void; onRemove: (id: string) => void;
   onSend: () => void; onPay: () => void; onSplit: () => void;
 }) {
@@ -512,8 +647,11 @@ function Ticket({
         )}
       </div>
 
+      <Pos2Extras cafeId={cafeId} />
+
       <div className="space-y-1 border-t border-border px-4 py-3 text-sm">
         <Row label="جمع" value={`${fmt(subtotal)} تومان`} />
+        {discount > 0 && <Row label="تخفیف" value={`−${fmt(discount)} تومان`} accent />}
         <Row label="مالیات ۹٪" value={`${fmt(tax)} تومان`} />
         <div className="flex items-center justify-between pt-1 text-lg font-extrabold">
           <span>مبلغ کل</span>
@@ -542,25 +680,50 @@ function Ticket({
   );
 }
 
-// ── Payment sheet ────────────────────────────────────────────────────────────
+// ── Payment sheet (cash / card / split + numpad + loyalty) ───────────────────
 function Pos2PaySheet({
-  tableName, amountDue, onClose, onConfirm,
+  tableName, amountDue, loyaltyPoints, onClose, onConfirm,
 }: {
-  tableName: string; amountDue: number;
+  tableName: string; amountDue: number; loyaltyPoints: number;
   onClose: () => void;
-  onConfirm: (method: "Cash" | "Card", amount: number) => void;
+  onConfirm: (payments: Payment[], loyaltyRedeem: number) => void;
 }) {
   const [method, setMethod] = useState<"cash" | "card" | "split">("cash");
   const [recv, setRecv] = useState("");
   const [splitN, setSplitN] = useState(2);
+  const [splitMethods, setSplitMethods] = useState<Method[]>(["Cash", "Cash"]);
+  const [useLoyalty, setUseLoyalty] = useState(false);
+
+  useEffect(() => {
+    setSplitMethods((prev) => Array.from({ length: splitN }, (_, i) => prev[i] ?? "Cash"));
+  }, [splitN]);
+
+  const maxRedeem = Math.min(loyaltyPoints, Math.floor(amountDue / POINT_VALUE));
+  const redeem = useLoyalty ? maxRedeem : 0;
+  const due = Math.max(0, amountDue - redeem * POINT_VALUE);
 
   const received = Number(recv || 0);
-  const change = received - amountDue;
+  const change = received - due;
   const press = (d: string) => setRecv((r) => (r + d).replace(/^0+(?=\d)/, "").slice(0, 12));
   const backspace = () => setRecv((r) => r.slice(0, -1));
-  const roundUp = (step: number) => Math.ceil(amountDue / step) * step;
-  const perPerson = Math.ceil(amountDue / splitN / 1000) * 1000;
-  const canConfirm = method === "cash" ? received >= amountDue : true;
+  const roundUp = (step: number) => Math.ceil(due / step) * step;
+
+  const splitAmounts = useMemo(() => {
+    const base = Math.floor(due / splitN);
+    const arr = Array<number>(splitN).fill(base);
+    arr[splitN - 1] += due - base * splitN;
+    return arr;
+  }, [due, splitN]);
+
+  const canConfirm = method === "cash" ? received >= due || due === 0 : true;
+
+  const confirm = () => {
+    let payments: Payment[];
+    if (method === "cash") payments = [{ method: "Cash", amount: due }];
+    else if (method === "card") payments = [{ method: "Card", amount: due }];
+    else payments = splitAmounts.map((a, i) => ({ method: splitMethods[i] ?? "Cash", amount: a }));
+    onConfirm(payments.filter((p) => p.amount > 0), redeem);
+  };
 
   const TABS = [
     { id: "cash", name: "نقدی", icon: Banknote },
@@ -568,16 +731,17 @@ function Pos2PaySheet({
     { id: "split", name: "تقسیم", icon: SplitSquareHorizontal },
   ] as const;
 
-  const confirm = () => onConfirm(method === "card" ? "Card" : "Cash", amountDue);
-
   return (
     <div dir="rtl" className="fixed inset-0 z-[60] flex items-stretch justify-center sm:items-center sm:p-4">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
-      <div className="relative flex w-full flex-col bg-card shadow-2xl sm:max-w-md sm:rounded-2xl">
+      <div className="relative flex max-h-svh w-full flex-col bg-card shadow-2xl sm:max-w-md sm:rounded-2xl">
         <div className="flex items-center justify-between border-b border-border px-4 py-3">
           <div>
             <p className="text-xs text-muted-foreground">پرداخت — {tableName}</p>
-            <p className="text-xl font-extrabold text-primary">{fmt(amountDue)} تومان</p>
+            <p className="text-xl font-extrabold text-primary">
+              {fmt(due)} تومان
+              {redeem > 0 && <span className="ms-2 text-sm font-medium text-muted-foreground line-through">{fmt(amountDue)}</span>}
+            </p>
           </div>
           <button type="button" onClick={onClose} className="rounded-lg p-2 hover:bg-accent" aria-label="بستن">
             <X className="size-5" />
@@ -600,7 +764,27 @@ function Pos2PaySheet({
           ))}
         </div>
 
-        <div className="min-h-0 flex-1 overflow-y-auto px-3 pb-3">
+        <div className="min-h-0 flex-1 overflow-y-auto px-3 pb-2">
+          {loyaltyPoints > 0 && (
+            <button
+              type="button"
+              onClick={() => setUseLoyalty((v) => !v)}
+              className={cn(
+                "mb-3 flex w-full items-center justify-between rounded-xl border-2 px-3 py-2.5 text-start transition-colors",
+                useLoyalty ? "border-primary bg-primary/10" : "border-border hover:bg-accent",
+              )}
+            >
+              <span className="flex items-center gap-2 text-sm font-medium">
+                <Sparkles className={cn("size-4", useLoyalty ? "text-primary" : "text-muted-foreground")} />
+                امتیاز وفاداری ({fmt(loyaltyPoints)})
+                <span className="text-xs text-muted-foreground">هر امتیاز ۱۰۰ تومان</span>
+              </span>
+              <span className={cn("text-sm font-bold", useLoyalty ? "text-primary" : "text-muted-foreground")}>
+                {useLoyalty ? `−${fmt(redeem * POINT_VALUE)}` : "استفاده"}
+              </span>
+            </button>
+          )}
+
           {method === "cash" && (
             <div className="space-y-3">
               <div className="rounded-xl bg-muted/60 p-3">
@@ -616,7 +800,7 @@ function Pos2PaySheet({
                 </div>
               </div>
               <div className="flex flex-wrap gap-2">
-                <Chip onClick={() => setRecv(String(amountDue))}>مبلغ دقیق</Chip>
+                <Chip onClick={() => setRecv(String(due))}>مبلغ دقیق</Chip>
                 <Chip onClick={() => setRecv(String(roundUp(50000)))}>{fmt(roundUp(50000))}</Chip>
                 <Chip onClick={() => setRecv(String(roundUp(100000)))}>{fmt(roundUp(100000))}</Chip>
                 <Chip onClick={() => setRecv(String(roundUp(500000)))}>{fmt(roundUp(500000))}</Chip>
@@ -637,8 +821,8 @@ function Pos2PaySheet({
               <div className="flex size-16 items-center justify-center rounded-2xl bg-primary/10 text-primary">
                 <CreditCard className="size-8" />
               </div>
-              <p className="font-medium">مبلغ روی دستگاه کارت‌خوان دریافت شود</p>
-              <p className="text-2xl font-extrabold text-primary">{fmt(amountDue)} تومان</p>
+              <p className="font-medium">مبلغ به دستگاه کارت‌خوان ارسال می‌شود</p>
+              <p className="text-2xl font-extrabold text-primary">{fmt(due)} تومان</p>
               <p className="text-sm text-muted-foreground">پس از تأیید تراکنش، دکمهٔ زیر را بزنید</p>
             </div>
           )}
@@ -646,7 +830,7 @@ function Pos2PaySheet({
           {method === "split" && (
             <div className="space-y-3">
               <div className="flex items-center justify-between">
-                <span className="text-sm font-medium text-muted-foreground">تقسیم بین</span>
+                <span className="text-sm font-medium text-muted-foreground">تعداد نفرات</span>
                 <div className="flex items-center gap-2">
                   {[2, 3, 4, 5, 6].map((n) => (
                     <button
@@ -663,13 +847,31 @@ function Pos2PaySheet({
                   ))}
                 </div>
               </div>
-              <div className="rounded-xl bg-muted/60 p-3 text-center">
-                <p className="text-sm text-muted-foreground">سهم هر نفر</p>
-                <p className="text-2xl font-extrabold text-primary">{fmt(perPerson)} تومان</p>
-              </div>
-              <p className="text-center text-xs text-muted-foreground">
-                کل مبلغ یکجا ثبت می‌شود؛ تقسیم صرفاً برای راهنمایی صندوق‌دار است.
-              </p>
+              <ul className="space-y-2">
+                {splitAmounts.map((amt, i) => (
+                  <li key={i} className="flex items-center justify-between gap-2 rounded-xl border border-border/70 px-3 py-2">
+                    <span className="flex items-center gap-2 font-medium">
+                      <span className="flex size-7 items-center justify-center rounded-full bg-primary/10 text-sm font-bold text-primary">{fmt(i + 1)}</span>
+                      {fmt(amt)} تومان
+                    </span>
+                    <div className="flex gap-1 rounded-lg border border-border p-0.5">
+                      {(["Cash", "Card"] as const).map((m) => (
+                        <button
+                          key={m}
+                          type="button"
+                          onClick={() => setSplitMethods((prev) => prev.map((x, j) => (j === i ? m : x)))}
+                          className={cn(
+                            "rounded-md px-2.5 py-1 text-xs font-bold transition-colors",
+                            (splitMethods[i] ?? "Cash") === m ? "bg-primary text-primary-foreground" : "text-muted-foreground hover:bg-accent",
+                          )}
+                        >
+                          {m === "Cash" ? "نقدی" : "کارت"}
+                        </button>
+                      ))}
+                    </div>
+                  </li>
+                ))}
+              </ul>
             </div>
           )}
         </div>
@@ -682,9 +884,9 @@ function Pos2PaySheet({
             className="flex min-h-[56px] w-full items-center justify-center gap-2 rounded-xl bg-primary text-lg font-extrabold text-primary-foreground transition-colors hover:bg-primary/90 disabled:opacity-40 active:scale-[0.99]"
           >
             <Check className="size-6" />
-            {method === "cash" && change >= 0 && received > 0
+            {method === "cash" && change > 0 && received > 0
               ? `تأیید — بازگشت ${fmt(change)}`
-              : `تأیید پرداخت ${fmt(amountDue)} تومان`}
+              : `تأیید پرداخت ${fmt(due)} تومان`}
           </button>
         </div>
       </div>
@@ -728,9 +930,9 @@ function Chip({ children, onClick }: { children: React.ReactNode; onClick: () =>
   );
 }
 
-function Row({ label, value }: { label: string; value: string }) {
+function Row({ label, value, accent }: { label: string; value: string; accent?: boolean }) {
   return (
-    <div className="flex items-center justify-between text-muted-foreground">
+    <div className={cn("flex items-center justify-between", accent ? "text-emerald-600" : "text-muted-foreground")}>
       <span>{label}</span>
       <span>{value}</span>
     </div>