feat(payment): expand Stripe methods and checkout handoff

src/data/services/api/api_path.ts

@@ -30,6 +30,12 @@ export class ApiPath {
   /** 消费一次性充值登录凭证 */
   static readonly topUpHandoffConsume = apiContract.topUpHandoffConsume.path;
 
+  /** 创建一次性外部浏览器支付交接链接（创建订单前）。 */
+  static readonly checkoutHandoffCreate = apiContract.checkoutHandoffCreate.path;
+
+  /** 消费一次性外部浏览器支付交接凭证。 */
+  static readonly checkoutHandoffConsume = apiContract.checkoutHandoffConsume.path;
+
   /** 刷新 Token */
   static readonly refresh = apiContract.refresh.path;