implement staging workflow

app-expo/app.config.ts

@@ -28,6 +28,8 @@ const LOCALES: Record<string, LocaleMessages> = {
 
 const SUPPORTED_LOCALES = ['zh', 'en'] as const;
 const PRIMARY_LOCALE = process.env.EXPO_PUBLIC_PRIMARY_LOCALE ?? 'zh';
+const API_BASE_URL = process.env.EXPO_PUBLIC_API_URL ?? '';
+const ALLOW_ANDROID_CLEARTEXT_TRAFFIC = API_BASE_URL.startsWith('http://');
 
 const PERMISSION_FALLBACKS: Record<PermissionKey, string> = {
   microphone: 'Allow $(PRODUCT_NAME) to access your microphone.',
@@ -149,6 +151,10 @@ export default ({ config }: ConfigContext): ExpoConfig => {
     plugins: [
       // CI/local release: android/app/keystore.properties + store file → release signing; -PversionName/-PversionCode
       './plugins/withAndroidReleaseSigning',
+      [
+        './plugins/withAndroidCleartextTraffic',
+        { enabled: ALLOW_ANDROID_CLEARTEXT_TRAFFIC },
+      ],
       'expo-router',
       [
         'expo-splash-screen',