added push notifications

frontend/screens/AllFeed.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from "react";
+import React, {useCallback, useState} from "react";
 import {
     View, Text, ScrollView, TouchableOpacity,
     ActivityIndicator, useColorScheme,
@@ -7,6 +7,7 @@ import { SafeAreaView } from "react-native-safe-area-context";
 import { Ionicons } from "@expo/vector-icons";
 import SearchBar from "../components/SearchBar";
 import CollapsibleCategory from "../components/CollapsibleCategory";
+import {useFocusEffect} from "expo-router";
 
 
 const GROUPS = [
@@ -40,6 +41,12 @@ export default function AllFeed() {
         setTimeout(() => setRefreshing(false), 800);
     };
 
+    useFocusEffect(
+        useCallback(() => {
+            handleRefresh();
+        }, [])
+    );
+
     return (
         <SafeAreaView className={`flex-1 ${dark ? "bg-obsidian-200" : "bg-parchment-50"}`}>
             {/* Header */}