upd: push notification on background

Deskripsi:
- on klik pada background notification
- hide and show notificationn foreground

No Issues

index.js

@@ -0,0 +1,16 @@
+// index.js
+import 'expo-router/entry'; // ⬅️ wajib ada agar expo-router tetap bekerja
+
+import messaging from '@react-native-firebase/messaging';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+
+// ✅ Firebase background handler — wajib diletakkan DI SINI
+messaging().setBackgroundMessageHandler(async remoteMessage => {
+
+  const screen = remoteMessage?.data?.category;
+  const content = remoteMessage?.data?.content;
+
+  if (screen && content) {
+    await AsyncStorage.setItem('navigateOnOpen', JSON.stringify({ screen, content }));
+  }
+});