Add customer Excel import/export and Gama bulk SMS sending.

Business SMS uses optional settings.sms.senderNumber (else advertising shortcode) with SendQuick for one recipient and SendBulk for quantity.

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

src/business-settings/business-settings.util.ts

@@ -121,6 +121,16 @@ function readString(value: unknown, fallback = '') {
   return typeof value === 'string' ? value.trim() : fallback;
 }
 
+/** Gama / Iranian service shortcodes are numeric (e.g. 5000123456). */
+export function normalizeSmsSenderNumber(value: unknown): string | null {
+  if (value == null) return null;
+  if (typeof value !== 'string' && typeof value !== 'number') return null;
+  const digits = String(value).replace(/\D/g, '');
+  if (!digits) return null;
+  if (digits.length < 8 || digits.length > 16) return null;
+  return digits;
+}
+
 function isPaymentGatewayId(value: unknown): value is PaymentGatewayId {
   return (
     typeof value === 'string' &&
@@ -380,6 +390,7 @@ export function normalizeBusinessSettings(raw: unknown): BusinessSettings {
   const store = isRecord(source.store) ? source.store : {};
   const modules = isRecord(source.modules) ? source.modules : {};
   const website = isRecord(source.website) ? source.website : {};
+  const sms = isRecord(source.sms) ? source.sms : {};
   const hasModulesKey = Object.prototype.hasOwnProperty.call(source, 'modules');
   const enabledModules = hasModulesKey
     ? Array.isArray(modules.enabled)
@@ -431,6 +442,9 @@ export function normalizeBusinessSettings(raw: unknown): BusinessSettings {
       ),
       sitemapConfig: normalizeWebsiteSitemapConfig(website.sitemapConfig),
     },
+    sms: {
+      senderNumber: normalizeSmsSenderNumber(sms.senderNumber),
+    },
   };
 }
 
@@ -482,6 +496,12 @@ export function mergeBusinessSettings(
           ? patch.website.sitemapConfig
           : current.website.sitemapConfig,
     },
+    sms: {
+      senderNumber:
+        patch.sms?.senderNumber !== undefined
+          ? patch.sms.senderNumber
+          : current.sms.senderNumber,
+    },
   };
 }