fix(invoices): localize payment method (wallet/gateway/mixed) to Persian

The payment method was rendered as the raw enum ("wallet") in the PDF and in the
invoice detail/list views. Map it through the existing methodWallet/methodGateway/
methodMixed dictionary keys everywhere.

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

frontend/src/app/[lang]/dashboard/admin/invoices/page.tsx

@@ -65,6 +65,8 @@ export default function AdminInvoicesPage() {
   const lineLabel = (label?: string) => (isFa ? translateInvoiceLabel(label) : (label ?? '-'));
   const lineDesc = (desc?: string) => (isFa ? translateInvoiceDescription(desc) : (desc ?? ''));
   const reasonLabel = (reason?: string) => (isFa ? translateInvoiceReason(reason) : (reason ?? '-'));
+  const methodLabel = (m?: string) =>
+    m ? ({ wallet: inv.methodWallet, gateway: inv.methodGateway, mixed: inv.methodMixed } as Record<string, string>)[m] ?? m : '-';
 
   const downloadPdfMutation = useMutation({
     mutationFn: (invoice: Invoice) =>
@@ -168,7 +170,7 @@ export default function AdminInvoicesPage() {
                     <td className="px-4 py-3">
                       <span className={statusClasses[invoice.status]}>{statusLabel(invoice.status)}</span>
                     </td>
-                    <td className="px-4 py-3 text-sm text-gray-600">{invoice.paymentMethod || '-'}</td>
+                    <td className="px-4 py-3 text-sm text-gray-600">{methodLabel(invoice.paymentMethod)}</td>
                     <td className="px-4 py-3 text-right rtl:text-left">
                       <p className="text-sm font-bold text-gray-900">{formatPrice(invoice.dueAmount)} {t.common.currencyShort}</p>
                       <p className="text-xs text-gray-400">{inv.total} {formatPrice(invoice.total)} {t.common.currencyShort}</p>
@@ -229,7 +231,7 @@ export default function AdminInvoicesPage() {
                 </div>
                 <div className="flex items-center gap-2 text-gray-700">
                   <Wallet className="w-4 h-4 text-gray-400" />
-                  {inv.method}: {selectedInvoice.paymentMethod || '-'}
+                  {inv.method}: {methodLabel(selectedInvoice.paymentMethod)}
                 </div>
               </div>
 

frontend/src/app/[lang]/dashboard/invoices/page.tsx

@@ -30,6 +30,8 @@ export default function InvoicesPage() {
   const lineLabel = (label?: string) => (isFa ? translateInvoiceLabel(label) : (label ?? '-'));
   const lineDesc = (desc?: string) => (isFa ? translateInvoiceDescription(desc) : (desc ?? ''));
   const reasonLabel = (reason?: string) => (isFa ? translateInvoiceReason(reason) : (reason ?? '-'));
+  const methodLabel = (m?: string) =>
+    m ? ({ wallet: inv.methodWallet, gateway: inv.methodGateway, mixed: inv.methodMixed } as Record<string, string>)[m] ?? m : '-';
   const authUser = useAuthStore((s) => s.user);
   const queryClient = useQueryClient();
   const searchParams = useSearchParams();
@@ -234,7 +236,7 @@ export default function InvoicesPage() {
                 <div className="flex justify-between"><span className="text-gray-500">{inv.total}</span><span className="font-semibold">{formatPrice(selectedInvoice.total)} {inv.toman}</span></div>
                 <div className="flex justify-between"><span className="text-gray-500">{inv.paidLabel}</span><span className="font-semibold text-green-600">{formatPrice(selectedInvoice.paidAmount)} {inv.toman}</span></div>
                 <div className="flex justify-between"><span className="text-gray-500">{inv.due}</span><span className="font-semibold text-primary-700">{formatPrice(selectedInvoice.dueAmount)} {inv.toman}</span></div>
-                <div className="flex justify-between"><span className="text-gray-500">{inv.method}</span><span>{selectedInvoice.paymentMethod || '-'}</span></div>
+                <div className="flex justify-between"><span className="text-gray-500">{inv.method}</span><span>{methodLabel(selectedInvoice.paymentMethod)}</span></div>
               </div>
 
               <div>

frontend/src/lib/invoice-pdf.ts

@@ -39,6 +39,15 @@ export function buildInvoicePdfData(
   const trDesc = (desc?: string) => (isFa ? translateInvoiceDescription(desc) : desc ?? '');
   const trReason = (reason?: string) => (isFa ? translateInvoiceReason(reason) : reason ?? '-');
 
+  const methodLabel = (m?: string) => {
+    const map: Record<string, string> = {
+      wallet: inv.methodWallet,
+      gateway: inv.methodGateway,
+      mixed: inv.methodMixed,
+    };
+    return m ? map[m] ?? m : '-';
+  };
+
   const cust = customer ?? invoice.user ?? undefined;
   const fullName = [cust?.firstName, cust?.lastName].filter(Boolean).join(' ').trim();
   const phone = cust?.phone || undefined;
@@ -50,7 +59,7 @@ export function buildInvoicePdfData(
   meta.push(
     { label: pdf.application, value: invoice.application?.name || trReason(invoice.reason) },
     { label: pdf.createdAt, value: formatDate(invoice.createdAt) },
-    { label: inv.method, value: invoice.paymentMethod || '-' },
+    { label: inv.method, value: methodLabel(invoice.paymentMethod) },
   );
   if (invoice.paidAt) meta.push({ label: pdf.paidAt, value: formatDate(invoice.paidAt) });
   if (invoice.gatewayTrackingCode) meta.push({ label: inv.tracking, value: invoice.gatewayTrackingCode });