rewrite finished i believe

components/services/notifications/PushNotificationManager.tsx

@@ -1,5 +1,5 @@
 import React, { useState, useEffect, useRef } from 'react';
-import { Platform } from 'react-native';
+import { Alert, Platform } from 'react-native';
 import * as Device from 'expo-device';
 import * as Notifications from 'expo-notifications';
 import Constants from 'expo-constants';
@@ -13,7 +13,11 @@ Notifications.setNotificationHandler({
   }),
 });
 
-export const sendPushNotification = async(expoPushToken: string, notification: NotificationMessage) => {
+export const sendPushNotification = async(expoPushToken: string | null, notification: NotificationMessage) => {
+  if (!expoPushToken) {
+    Alert.alert('Error', 'No push token found.');
+    return;
+  }
   const message = { 
     to: expoPushToken,
     sound: notification.sound ?? 'default',
@@ -21,15 +25,22 @@ export const sendPushNotification = async(expoPushToken: string, notification: N
     body: notification.body,
     data: notification.data ?? {},
   };
-  await fetch('https://exp.host/--/api/v2/push/send', {
-    method: 'POST',
-    headers: {
-      Accept: 'application/json',
-      'Accept-encoding': 'gzip, deflate',
-      'Content-Type': 'application/json',
-    },
-    body: JSON.stringify(message),
+  try {
+    const response = await fetch('https://exp.host/--/api/v2/push/send', {
+      method: 'POST',
+      headers: {
+        Accept: 'application/json',
+        'Accept-encoding': 'gzip, deflate',
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify(message),
     });
+    const result = await response.json();
+    console.log('Push notification sent:', result);
+  } catch (error) {
+    console.error('Error sending push notification:', error);
+    Alert.alert('Error', 'Failed to send push notification.');
+  }
 };
 
 const handleRegistrationError = (errorMessage: string) => {