Add website special-products source setting for storefronts.

Let businesses choose product vs store_item sourcing, defaulting from the store module, and expose it on tenant resolve and store-specials.

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

src/business-settings/business-settings.types.ts

@@ -99,6 +99,16 @@ export type StoreSettings = {
   ePayment: EPaymentSettings;
 };
 
+/** Where website special-product carousels read from. */
+export const SPECIAL_PRODUCTS_SOURCE_IDS = ['product', 'store_item'] as const;
+
+export type SpecialProductsSource = (typeof SPECIAL_PRODUCTS_SOURCE_IDS)[number];
+
+/** Per-business website CMS settings. */
+export type WebsiteSettings = {
+  specialProductsSource: SpecialProductsSource;
+};
+
 /** Optional business-dashboard CMS modules. Always-on areas (customers, website, etc.) are not listed. */
 export const BUSINESS_DASHBOARD_MODULE_IDS = [
   'products',
@@ -148,6 +158,7 @@ export type BusinessSettings = {
   dashboard: DashboardSettings;
   store: StoreSettings;
   modules: ModulesSettings;
+  website: WebsiteSettings;
 };
 
 export const DEFAULT_ORDER_PROCESS_STEPS: OrderProcessStep[] = [
@@ -238,4 +249,7 @@ export const DEFAULT_BUSINESS_SETTINGS: BusinessSettings = {
     enabled: DEFAULT_ENABLED_BUSINESS_MODULES,
     charts: DEFAULT_HOME_CHARTS,
   },
+  website: {
+    specialProductsSource: 'store_item',
+  },
 };