Expose invoice locale on public payloads and accept English name fields on create customer.

Public invoices need branding defaultLocale for RTL viewers; customer create aligns with the business add-customer form.

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

src/customers/customers.service.ts

@@ -286,6 +286,8 @@ export class CustomersService {
             email: dto.email,
             firstName: dto.firstName,
             lastName: dto.lastName,
+            firstNameEn: dto.firstNameEn?.trim() || null,
+            lastNameEn: dto.lastNameEn?.trim() || null,
             cellVerifiedAt: new Date(),
           },
         }));

src/customers/dto/create-customer.dto.ts

@@ -26,6 +26,16 @@ export class CreateCustomerDto {
   @MinLength(2)
   lastName!: string;
 
+  @IsOptional()
+  @IsString()
+  @MinLength(2)
+  firstNameEn?: string;
+
+  @IsOptional()
+  @IsString()
+  @MinLength(2)
+  lastNameEn?: string;
+
   @IsOptional()
   @IsEmail()
   email?: string;

src/invoices/invoices.service.ts

@@ -23,6 +23,8 @@ import {
   UpdateInvoiceStatusDto,
   UpdateInvoiceTemplateDto,
 } from './dto/invoice.dto';
+import { normalizeBusinessSettings } from '../business-settings/business-settings.util';
+import type { DashboardLocale } from '../business-settings/business-settings.types';
 
 /** 12-digit unguessable public link token (not the sequential PK). */
 const PUBLIC_ID_MIN = 100_000_000_000;
@@ -214,6 +216,7 @@ export class InvoicesService {
         id: true,
         name: true,
         nameFa: true,
+        settings: true,
         domains: {
           where: { isActive: true },
           orderBy: [{ isPrimary: 'desc' as const }, { createdAt: 'asc' as const }],
@@ -427,6 +430,7 @@ export class InvoicesService {
         id: bigint;
         name: string;
         nameFa: string | null;
+        settings?: Prisma.JsonValue;
         domains?: Array<{ host: string }>;
       };
       issuer?: { id: bigint; firstName: string | null; lastName: string | null } | null;
@@ -1244,13 +1248,26 @@ export class InvoicesService {
   /** Public payload: no internal notes / issuer / sequential id / user contact info. */
   private toPublicInvoicePayload(row: Parameters<InvoicesService['serializeInvoice']>[0]) {
     const serialized = this.serializeInvoice(row, true);
+    const locale: DashboardLocale = normalizeBusinessSettings(
+      row.business && 'settings' in row.business ? row.business.settings : null,
+    ).branding.defaultLocale;
+
     return {
       publicId: serialized.publicId,
       status: serialized.status,
       name: serialized.name,
       topText: serialized.topText,
       issuedAt: serialized.issuedAt,
-      business: serialized.business,
+      locale,
+      business: serialized.business
+        ? {
+            ...serialized.business,
+            displayName:
+              locale === 'fa' && serialized.business.nameFa?.trim()
+                ? serialized.business.nameFa.trim()
+                : serialized.business.name,
+          }
+        : undefined,
       user: serialized.user
         ? { firstName: serialized.user.firstName, lastName: serialized.user.lastName }
         : null,