Implement Notification Service and Refactor Calendar Screen

Backend/routes/appointments.py

@@ -53,13 +53,16 @@ def add_appointment():
         if not all([title, content, appointment_date, appointment_time, appointment_location]):
             return jsonify({"error": "Missing required fields"}), 400
 
-        db.execute(
+        cursor = db.cursor()
+        cursor.execute(
             'INSERT INTO appointments (title, content, appointment_date, appointment_time, appointment_location, appointment_status) VALUES (?, ?, ?, ?, ?, ?)',
             (title, content, appointment_date, appointment_time, appointment_location, 'pending')
         )
         db.commit()
+
+        new_id = cursor.lastrowid
 
-        return jsonify({"status": "success", "message": "Appointment added successfully"}), 200
+        return jsonify({"status": "success", "message": "Appointment added successfully", "id": new_id}), 200
 
     except sqlite3.OperationalError:
         return jsonify({"error": "Database Error"}), 500

Frontend/App.jsx

@@ -1,12 +1,24 @@
-import React from 'react';
+import React, { useEffect } from 'react';
 import { NavigationContainer } from '@react-navigation/native';
 import { Provider as PaperProvider} from 'react-native-paper';
 import { ThemeProvider } from './src/theme/ThemeContext';
 import { AgentProvider } from './src/context/AgentContext';
 import StackNavigation from './src/navigation/StackNavigator';
+import NotificationService from './src/services/NotificationService';
 
+export default  function App() {
+
+  useEffect(() => {
+    const initNotifications = async () => {
+      try {
+        await NotificationService.init();
+      } catch (error) {
+        console.error('App Failed to initialize notifications:', error);
+      }
+    };
+    initNotifications();
+  }, []);
 
-export default function App() {
   return (
       <PaperProvider>
         <ThemeProvider>

Frontend/android/app/src/main/AndroidManifest.xml

@@ -1,8 +1,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.VIBRATE" />
 
+    <uses-permission android:name="android.permission.VIBRATE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
     <application
       android:name=".MainApplication"
       android:label="@string/app_name"

Frontend/android/gradle.properties

@@ -21,6 +21,7 @@ org.gradle.jvmargs=-Xmx2048m -XX:MaxMetaspaceSize=512m
 # Android operating system, and which are packaged with your app's APK
 # https://developer.android.com/topic/libraries/support-library/androidx-rn
 android.useAndroidX=true
+android.enableJetifier=true
 
 # Use this property to specify which architecture you want to build.
 # You can also override it from the CLI using