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/src/shell/ShellApp.test.tsx

@@ -630,6 +630,30 @@ describe('ShellApp HostBridge event injection', () => {
     warnSpy.mockRestore();
   });
 
+  test('blocked WebView file downloads are logged for host diagnostics', async () => {
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => undefined);
+    const ShellApp = await importShellApp();
+    render(<ShellApp />);
+
+    const webViewProps = shellHarness.webViewProps.current as {
+      onFileDownload?: (event: unknown) => void;
+    };
+    const downloadEvent = {
+      nativeEvent: {
+        downloadUrl: 'blob:https://app.genarrative.world/download-id',
+      },
+    };
+
+    webViewProps.onFileDownload?.(downloadEvent);
+
+    expect(warnSpy).toHaveBeenCalledWith(
+      'mobile shell blocked WebView file download',
+      downloadEvent,
+    );
+
+    warnSpy.mockRestore();
+  });
+
   test('initial deep link read failures are logged without replacing the current WebView URL', async () => {
     const { Linking } = await import('react-native');
     const initialUrlError = new Error('initial URL unavailable');

apps/mobile-shell/src/shell/ShellApp.tsx

@@ -71,6 +71,10 @@ function logMobileShellNavigationFailure(label: string, error: unknown) {
   console.warn(`mobile shell navigation failed for ${label}`, error);
 }
 
+function logMobileShellDownloadBlocked(event: unknown) {
+  console.warn('mobile shell blocked WebView file download', event);
+}
+
 function logMobileShellDeepLinkFailure(label: string, error: unknown) {
   console.warn(`mobile shell deep link failed for ${label}`, error);
 }
@@ -445,7 +449,9 @@ export default function ShellApp() {
       ),
     );
   };
-  const handleBlockedFileDownload = () => undefined;
+  const handleBlockedFileDownload = (event: unknown) => {
+    logMobileShellDownloadBlocked(event);
+  };
 
   return (
     <SafeAreaProvider>