fix(runtime): e2e 发现的 3 个 bug 修复

- download: desktop_download_apps SingleChildScrollView 加 primary:true (Scrollbar 缺 ScrollPosition)
- contact-stores: checkDomainAvailability async 后 setState 加 mounted 保护 (dispose 后 setState)
- buy-service: _loadData 加 data 结构校验 + mounted 保护 (API 400 无效参数时 data 为错误结构 -> RangeError)

tools/e2e/node_modules/playwright/test.mjs

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import playwright from './test.js';
+
+export const chromium = playwright.chromium;
+export const firefox = playwright.firefox;
+export const webkit = playwright.webkit;
+export const selectors = playwright.selectors;
+export const devices = playwright.devices;
+export const errors = playwright.errors;
+export const request = playwright.request;
+export const _electron = playwright._electron;
+export const _android = playwright._android;
+export const _baseTest = playwright._baseTest;
+export const _utilityTest = playwright._utilityTest;
+export const test = playwright.test;
+export const expect = playwright.expect;
+export const defineConfig = playwright.defineConfig;
+export const mergeTests = playwright.mergeTests;
+export const mergeExpects = playwright.mergeExpects;
+export default playwright.test;