added update check

frontend/app/_layout.tsx

@@ -1,5 +1,5 @@
 import "../globals.css";
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import { Stack } from 'expo-router';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
 import {
@@ -11,6 +11,8 @@ import {
 } from '@react-native-firebase/messaging';
 import { registerDeviceToken, listenForTokenRefresh, displayLocalNotification } from '@/services/notifications';
 import { AuthProvider, useAuth } from "@/context/AuthContext";
+import { useUpdatecheck } from '@/hooks/useUpdatecheck';
+import { UpdatePrompt } from '@/components/UpdatePrompt';
 import Toast from 'react-native-toast-message';
 
 // Registered at module scope so it's installed as soon as this entry file
@@ -60,12 +62,22 @@ function NotificationSetup() {
     return null;
 }
 
+function UpdateCheck() {
+    const { updateInfo } = useUpdatecheck();
+    const [dismissed, setDismissed] = useState(false);
+
+    if (!updateInfo || dismissed) return null;
+
+    return <UpdatePrompt updateInfo={updateInfo} onDismiss={() => setDismissed(true)} />;
+}
+
 export default function RootLayout() {
     return (
         <AuthProvider>
             <SafeAreaProvider>
                 <NotificationSetup />
                 <Stack screenOptions={{ headerShown: false }} />
+                <UpdateCheck />
                 <Toast />
             </SafeAreaProvider>
         </AuthProvider>