feat: Add settings provider for theme and time range management

- Implemented SettingsProvider to manage user preferences for theme options and time ranges for reminders.
- Added persistent reminder settings with configurable retry intervals and maximum attempts.
- Created UI for settings screen to allow users to customize their preferences.
- Integrated shared_preferences for persistent storage of user settings.

feat: Introduce Ingredient model

- Created Ingredient model to represent nutritional components with properties for id, name, amount, and unit.
- Added methods for serialization and deserialization of Ingredient objects.

feat: Develop Archived Supplements Screen

- Implemented ArchivedSupplementsScreen to display archived supplements with options to unarchive or delete.
- Added UI components for listing archived supplements and handling user interactions.

chore: Update dependencies in pubspec.yaml and pubspec.lock

- Updated shared_preferences dependency to the latest version.
- Removed flutter_datetime_picker_plus dependency and added file dependency.
- Updated Flutter SDK constraint to >=3.27.0.

lib/screens/home_screen.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import '../providers/supplement_provider.dart';
+import '../providers/settings_provider.dart';
 import 'supplements_list_screen.dart';
 import 'history_screen.dart';
 import 'add_supplement_screen.dart';
+import 'settings_screen.dart';
 
 class HomeScreen extends StatefulWidget {
   const HomeScreen({super.key});
@@ -18,6 +20,7 @@ class _HomeScreenState extends State<HomeScreen> {
   final List<Widget> _screens = [
     const SupplementsListScreen(),
     const HistoryScreen(),
+    const SettingsScreen(),
   ];
 
   @override
@@ -25,9 +28,42 @@ class _HomeScreenState extends State<HomeScreen> {
     super.initState();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       context.read<SupplementProvider>().initialize();
+      _startPersistentReminderCheck();
     });
   }
 
+  void _startPersistentReminderCheck() {
+    // Check immediately and then every 10 minutes
+    _checkPersistentReminders();
+    
+    // Set up periodic checking
+    Future.doWhile(() async {
+      await Future.delayed(const Duration(minutes: 10));
+      if (mounted) {
+        await _checkPersistentReminders();
+        return true;
+      }
+      return false;
+    });
+  }
+
+  Future<void> _checkPersistentReminders() async {
+    if (!mounted) return;
+    
+    try {
+      final supplementProvider = context.read<SupplementProvider>();
+      final settingsProvider = context.read<SettingsProvider>();
+      
+      await supplementProvider.checkPersistentRemindersWithSettings(
+        persistentReminders: settingsProvider.persistentReminders,
+        reminderRetryInterval: settingsProvider.reminderRetryInterval,
+        maxRetryAttempts: settingsProvider.maxRetryAttempts,
+      );
+    } catch (e) {
+      print('Error checking persistent reminders: $e');
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -39,6 +75,7 @@ class _HomeScreenState extends State<HomeScreen> {
             _currentIndex = index;
           });
         },
+        type: BottomNavigationBarType.fixed,
         items: const [
           BottomNavigationBarItem(
             icon: Icon(Icons.medication),
@@ -48,6 +85,10 @@ class _HomeScreenState extends State<HomeScreen> {
             icon: Icon(Icons.history),
             label: 'History',
           ),
+          BottomNavigationBarItem(
+            icon: Icon(Icons.settings),
+            label: 'Settings',
+          ),
         ],
       ),
       floatingActionButton: _currentIndex == 0