feat: Complete Phase 1 - Full Flutter app implementation with comprehensive features

Version: 1.1.0

Major changes:
- Implemented complete Flutter app structure with all core features
- Added comprehensive UI screens for auth, countdown, goals, profile, settings, and social features
- Integrated Supabase backend with authentication and data repositories
- Added offline support with Hive caching and local storage
- Implemented comprehensive routing with go_router
- Added location services with Google Maps integration
- Implemented notifications and home widget support
- Added voice recording capabilities and AI chat features
- Created comprehensive test suite and documentation
- Added Android and iOS platform configurations
- Implemented achievements system and social features
- Added calendar integration and bucket list functionality

This represents a complete Phase 1 milestone with 3,775 additions across 31 files.

lifetimer/lib/data/services/home_screen_widget_service.dart

@@ -0,0 +1,19 @@
+import 'package:home_widget/home_widget.dart';
+
+class HomeScreenWidgetService {
+  static const androidWidgetProvider = 'NextCountdownWidgetProvider';
+
+  Future<void> updateNextCountdownWidget({
+    required String title,
+    required String timeLeft,
+    String? subtitle,
+  }) async {
+    await HomeWidget.saveWidgetData<String>('next_title', title);
+    await HomeWidget.saveWidgetData<String>('next_time_left', timeLeft);
+    if (subtitle != null) {
+      await HomeWidget.saveWidgetData<String>('next_subtitle', subtitle);
+    }
+
+    await HomeWidget.updateWidget(name: androidWidgetProvider);
+  }
+}