记录移动壳下载阻断事件

移动壳阻断 WebView 文件下载时记录宿主诊断日志

补充移动壳下载阻断日志测试

扩展移动壳配置门禁防止下载阻断静默回退

apps/mobile-shell/scripts/check-config.mjs

@@ -1497,6 +1497,8 @@ for (const snippet of [
   'source: window',
   'MOBILE_WEBVIEW_BEFORE_CONTENT_SCRIPT',
   'shouldBlockMobileWebViewNavigationRequest',
+  'logMobileShellDownloadBlocked',
+  "console.warn('mobile shell blocked WebView file download', event)",
   'SafeAreaProvider',
   'SafeAreaView',
   'MOBILE_SHELL_SAFE_AREA_EDGES',
@@ -1515,6 +1517,7 @@ for (const snippet of [
   'webviewDebuggingEnabled={false}',
   'injectedJavaScriptBeforeContentLoaded={MOBILE_WEBVIEW_BEFORE_CONTENT_SCRIPT}',
   'handleBlockedFileDownload',
+  'logMobileShellDownloadBlocked(event)',
   'onFileDownload={handleBlockedFileDownload}',
   'setSupportMultipleWindows={false}',
   'logMobileShellNavigationFailure',
@@ -1530,6 +1533,10 @@ if (shellAppSource.includes('catch(() => undefined)')) {
   throw new Error('mobile shell ShellApp must not hide async navigation failures');
 }
 
+if (!shellAppTestSource.includes('blocked WebView file downloads are logged for host diagnostics')) {
+  throw new Error('mobile shell tests must cover blocked WebView file download diagnostics');
+}
+
 for (const snippet of [
   "describe('mobile shell safe area'",
   "test('protects the WebView from every device edge'",