接入移动壳安全区布局

Expo 移动壳使用 SafeAreaProvider 和 SafeAreaView 包裹 WebView

新增安全区边界配置和测试

补充移动壳安全区依赖检查和架构文档

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

@@ -124,6 +124,9 @@ for (const snippet of [
   'subscribeMobileNetworkStatus',
   'navigation.canGoBack',
   'buildHostBridgeMessageScript',
+  'SafeAreaProvider',
+  'SafeAreaView',
+  'MOBILE_SHELL_SAFE_AREA_EDGES',
 ]) {
   if (!appSource.includes(snippet)) {
     throw new Error(`mobile shell App missing ${snippet}`);
@@ -137,6 +140,7 @@ for (const dependency of [
   'expo-network',
   'expo-notifications',
   'expo-sharing',
+  'react-native-safe-area-context',
 ]) {
   if (!packageConfig.dependencies?.[dependency]) {
     throw new Error(`mobile shell package missing ${dependency}`);