Begin changes to ask for Android permissions rather than silrently failing.

lib/main.dart

@@ -1,5 +1,6 @@
 import 'dart:io';
 import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:geolocator/geolocator.dart';
 import 'package:shared_preferences/shared_preferences.dart';
@@ -7,6 +8,7 @@ import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:timezone/data/latest_all.dart' as tz;
 import 'package:timezone/timezone.dart' as tz;
 import 'package:http/http.dart' as http;
+
 import 'dart:convert';
 
 void main() async {
@@ -171,6 +173,12 @@ class _HomeScreenState extends State<HomeScreen> {
   Timer? _alarmTimer;
 
   Future<void> _scheduleAlarm() async {
+    final canSchedule = await android?.canScheduleExactNotifications();
+    if (canSchedule != true) {
+      _showSnack('Permissions not yet granted, requesting...');
+      await android?.requestExactAlarmsPermission();
+    }
+
     final sunsetText = _sunsetController.text.trim();
     if (sunsetText.isEmpty) return;
 
@@ -417,3 +425,27 @@ class _HomeScreenState extends State<HomeScreen> {
     return '${dh.toString().padLeft(2, '0')}:${dm.toString().padLeft(2, '0')}';
   }
 }
+
+final _plugin = FlutterLocalNotificationsPlugin();
+
+Future<void> requestPermissions() async {
+  if (Platform.isAndroid) {
+    final android =
+        _plugin
+            .resolvePlatformSpecificImplementation<
+              AndroidFlutterLocalNotificationsPlugin
+            >();
+
+    // Android 13+ — standard notification permission (shows a dialog)
+    await android?.requestNotificationsPermission();
+
+    // Android 12+ — exact alarm special access (opens system settings page)
+    await android?.requestExactAlarmsPermission();
+  }
+}
+
+final android =
+    _plugin
+        .resolvePlatformSpecificImplementation<
+          AndroidFlutterLocalNotificationsPlugin
+        >();