fix: only request notification permissions for signed-in users

app/components/NotificationHandler.js

@@ -2,31 +2,32 @@
 
 import { useEffect, useState } from "react";
 import { requestNotificationPermission, onForegroundMessage } from "../utils/firebase";
+import AuthService from "../services/AuthService";
 
 export default function NotificationHandler() {
   const [notification, setNotification] = useState(null);
+  const [unsubscribe, setUnsubscribe] = useState(null);
 
   useEffect(() => {
-    // Request permission and get token
+    const user = AuthService.getUser();
+    if (!user) return;
+
+    // User is signed in — request permission and listen for messages
     requestNotificationPermission().then((token) => {
       if (token) {
         console.log("[Notifications] FCM token obtained");
-        // TODO: Send token to your backend to register the device
-        // e.g. apiFetch('/Notifications/RegisterDevice', { method: 'POST', body: { token } })
       }
     });
 
-    // Listen for foreground messages
-    const unsubscribe = onForegroundMessage((payload) => {
+    const unsub = onForegroundMessage((payload) => {
       const title = payload.notification?.title || payload.data?.title || "Sweet Home";
       const body = payload.notification?.body || payload.data?.body || "";
       setNotification({ title, body });
-
-      // Auto-dismiss after 5 seconds
       setTimeout(() => setNotification(null), 5000);
     });
 
-    return () => unsubscribe();
+    setUnsubscribe(() => unsub);
+    return () => unsub();
   }, []);
 
   if (!notification) return null;