接入移动壳文本文件导出能力

Expo 移动壳通过文件系统写入缓存文本并调用系统分享保存面板

补充移动壳导出能力依赖、配置守卫和 HostBridge 单测

更新宿主壳能力协议、方案文档和共享决策记录

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

@@ -6,6 +6,10 @@ const appConfigPath = new URL('../app.json', import.meta.url);
 const appConfig = JSON.parse(fs.readFileSync(appConfigPath, 'utf8')).expo;
 const appPath = new URL('../App.tsx', import.meta.url);
 const appSource = fs.readFileSync(appPath, 'utf8');
+const bridgePath = new URL('../src/mobileHostBridge.ts', import.meta.url);
+const bridgeSource = fs.readFileSync(bridgePath, 'utf8');
+const packagePath = new URL('../package.json', import.meta.url);
+const packageConfig = JSON.parse(fs.readFileSync(packagePath, 'utf8'));
 const iconPath = new URL('../assets/icon.png', import.meta.url);
 const icon = PNG.sync.read(fs.readFileSync(iconPath));
 
@@ -48,3 +52,19 @@ for (const snippet of [
     throw new Error(`mobile shell App missing ${snippet}`);
   }
 }
+
+for (const dependency of ['expo-file-system', 'expo-sharing']) {
+  if (!packageConfig.dependencies?.[dependency]) {
+    throw new Error(`mobile shell package missing ${dependency}`);
+  }
+}
+
+for (const snippet of [
+  'file.exportText',
+  'Sharing.shareAsync',
+  'normalizeHostBridgeExportFileName',
+]) {
+  if (!bridgeSource.includes(snippet)) {
+    throw new Error(`mobile shell HostBridge missing ${snippet}`);
+  }
+}