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/core/utils/date_time_utils.dart

@@ -50,6 +50,10 @@ class DateTimeUtils {
     return DateFormat('MMM dd, yyyy').format(date);
   }
 
+  static String formatShortDate(DateTime date) {
+    return DateFormat('MMM yyyy').format(date);
+  }
+
   static String formatDateTime(DateTime dateTime) {
     return DateFormat('MMM dd, yyyy • HH:mm').format(dateTime);
   }