chore: vendor client into main repo

client/app/_layout.tsx

@@ -0,0 +1,81 @@
+import FontAwesome from '@expo/vector-icons/FontAwesome';
+import { DarkTheme, DefaultTheme, ThemeProvider } from '@react-navigation/native';
+import { useFonts } from 'expo-font';
+import { Stack } from 'expo-router';
+import * as SplashScreen from 'expo-splash-screen';
+import { useEffect, useState } from 'react';
+import 'react-native-reanimated';
+
+import { useColorScheme } from '@/components/useColorScheme';
+import { initI18n } from '@/src/i18n';
+
+export {
+  // Catch any errors thrown by the Layout component.
+  ErrorBoundary,
+} from 'expo-router';
+
+export const unstable_settings = {
+  // Ensure that reloading on `/modal` keeps a back button present.
+  initialRouteName: 'index',
+};
+
+// Prevent the splash screen from auto-hiding before asset loading is complete.
+SplashScreen.preventAutoHideAsync();
+
+export default function RootLayout() {
+  const [loaded, error] = useFonts({
+    SpaceMono: require('../assets/fonts/SpaceMono-Regular.ttf'),
+    ...FontAwesome.font,
+  });
+  const [i18nReady, setI18nReady] = useState(false);
+
+  // Expo Router uses Error Boundaries to catch errors in the navigation tree.
+  useEffect(() => {
+    if (error) throw error;
+  }, [error]);
+
+  useEffect(() => {
+    initI18n()
+      .catch((e) => {
+        // i18n 初始化失败不应阻塞 App 启动，先打印错误再继续
+        console.error('i18n 初始化失败', e);
+      })
+      .finally(() => setI18nReady(true));
+  }, []);
+
+  useEffect(() => {
+    // 等字体与 i18n 都准备好后再隐藏启动页，避免文案闪烁
+    if (loaded && i18nReady) {
+      SplashScreen.hideAsync();
+    }
+  }, [loaded, i18nReady]);
+
+  if (!loaded || !i18nReady) {
+    return null;
+  }
+
+  return <RootLayoutNav />;
+}
+
+function RootLayoutNav() {
+  const colorScheme = useColorScheme();
+
+  return (
+    <ThemeProvider value={colorScheme === 'dark' ? DarkTheme : DefaultTheme}>
+      <Stack screenOptions={{ headerShown: false }}>
+        {/* 启动分发页：根据 onboarding 状态跳转 */}
+        <Stack.Screen name="index" />
+
+        {/* Onboarding 分组 */}
+        <Stack.Screen name="(onboarding)" />
+
+        {/* 主应用分组（不使用 Tabs） */}
+        <Stack.Screen name="(app)" />
+
+        {/* 其他 */}
+        <Stack.Screen name="modal" options={{ presentation: 'modal' }} />
+        <Stack.Screen name="+not-found" />
+      </Stack>
+    </ThemeProvider>
+  );
+}