feat: show preorder payment method during pricing

Admins need the customer's cash or check term before they set the price.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/utils/settlement.ts

@@ -11,10 +11,21 @@ const CASH_PHASE_RAW_STATUSES = new Set([
 export function settlementMethodLabel(method?: string | null): string {
   if (!method) return 'انتخاب‌نشده'
   if (method === 'check') return 'چکی'
-  if (method === 'cash_check') return 'نقدی-چکی'
+  if (method === 'cash_check') return 'نصف نقد، نصف چکی'
   return 'نقدی'
 }
 
+export function settlementPlanLabel(
+  method?: string | null,
+  checkTermMonths?: number | null,
+): string {
+  const base = settlementMethodLabel(method)
+  if ((method === 'check' || method === 'cash_check') && checkTermMonths) {
+    return `${base} · چک ${checkTermMonths} ماهه`
+  }
+  return base
+}
+
 export function orderShowsCashActions(
   order: { settlementMethod?: SettlementMethod | null; rawStatus?: string },
 ): boolean {