refactor: exclude UI-presenting APIs from DataTargetApi

Background extensions should not present UI to merchants. Replaced
StandardApi wrapper with explicit composition that excludes ToastApi,
PrintApi, CameraApi, and PinPadApi.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vctrchu

packages/ui-extensions/src/surfaces/point-of-sale/api/data-target-api/data-target-api.ts

@@ -1,7 +1,22 @@
 import {CartApi} from '../cart-api/cart-api';
-import {StandardApi} from '../standard/standard-api';
+import {ConnectivityApi} from '../connectivity-api/connectivity-api';
+import {DeviceApi} from '../device-api/device-api';
+import {LocaleApi} from '../locale-api/locale-api';
+import {ProductSearchApi} from '../product-search-api/product-search-api';
+import {SessionApi} from '../session-api/session-api';
+import {StorageApi} from '../storage-api/storage-api';
+import type {I18n} from '../../../../api';
 
 /**
  * API surface for non-rendering data extension targets.
  */
-export type DataTargetApi<T> = StandardApi<T> & CartApi;
+export type DataTargetApi<T> = {
+  extensionPoint: T;
+  i18n: I18n;
+} & SessionApi &
+  StorageApi &
+  LocaleApi &
+  ConnectivityApi &
+  DeviceApi &
+  ProductSearchApi &
+  CartApi;