feat(mobile): Expo → RN CLI 전환 + Android 빌드 성공

RN 0.85 + React 19 기반 apps/mobile-rn 프로젝트 생성.
6개 화면 이식 (Login, Dash, History, Record, Talk, Settings).
@react-navigation/native + bottom-tabs 네비게이션 구성.
Windows NDK CMake libc++_shared 링크 버그 워크아라운드 포함.
Galaxy Fold (SM_F956N) 무선 디버깅 APK 설치 확인.

apps/mobile-rn/App.tsx

@@ -0,0 +1,38 @@
+// App.tsx — D3RO Voice Mobile root
+import { NavigationContainer } from '@react-navigation/native'
+import { createNativeStackNavigator } from '@react-navigation/native-stack'
+import { GestureHandlerRootView } from 'react-native-gesture-handler'
+import { SafeAreaProvider } from 'react-native-safe-area-context'
+import { StatusBar } from 'react-native'
+import { I18nProvider } from '@d3ro/i18n'
+import { d3roNativePalette } from '@d3ro/ui-native'
+import { AuthProvider } from './src/lib/auth-context'
+import TabNavigator from './src/navigation/TabNavigator'
+import LoginScreen from './src/screens/LoginScreen'
+
+const Stack = createNativeStackNavigator()
+
+export default function App(): React.ReactElement {
+  return (
+    <GestureHandlerRootView style={{ flex: 1 }}>
+      <SafeAreaProvider>
+        <I18nProvider initialLocale="ko">
+          <AuthProvider>
+            <StatusBar barStyle="light-content" backgroundColor={d3roNativePalette.bg.app} />
+            <NavigationContainer>
+              <Stack.Navigator
+                screenOptions={{
+                  headerShown: false,
+                  contentStyle: { backgroundColor: d3roNativePalette.bg.app },
+                }}
+              >
+                <Stack.Screen name="Login" component={LoginScreen} />
+                <Stack.Screen name="Main" component={TabNavigator} />
+              </Stack.Navigator>
+            </NavigationContainer>
+          </AuthProvider>
+        </I18nProvider>
+      </SafeAreaProvider>
+    </GestureHandlerRootView>
+  )
+}