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/bootstrap/env.dart

@@ -8,4 +8,63 @@ class Env {
     'SUPABASE_ANON_KEY',
     defaultValue: 'your-anon-key',
   );
+
+  static const String unsplashAccessKey = String.fromEnvironment(
+    'UNSPLASH_ACCESS_KEY',
+    defaultValue: 'your-unsplash-access-key',
+  );
+
+  static const String unsplashSecretKey = String.fromEnvironment(
+    'UNSPLASH_SECRET_KEY',
+    defaultValue: '',
+  );
+
+  static const String unsplashMode = String.fromEnvironment(
+    'UNSPLASH_MODE',
+    defaultValue: 'TRUE',
+  );
+
+  static const String pexelsApiKey = String.fromEnvironment(
+    'PEXELS_API_KEY',
+    defaultValue: 'your-pexels-api-key',
+  );
+
+  static const String pexelsMode = String.fromEnvironment(
+    'PEXELS_MODE',
+    defaultValue: 'TRUE',
+  );
+
+  static const String mistralApiKey = String.fromEnvironment(
+    'MISTRAL_API_KEY',
+    defaultValue: 'your-mistral-api-key',
+  );
+
+  static const String mistralChatModel = String.fromEnvironment(
+    'MISTRAL_CHAT_MODEL',
+    defaultValue: 'ministral-14b-latest',
+  );
+
+  static const String mistralVoiceModel = String.fromEnvironment(
+    'MISTRAL_VOICE_MODEL',
+    defaultValue: 'voxtral-mini-latest',
+  );
+
+  static const String iosAppGroupId = String.fromEnvironment(
+    'IOS_APP_GROUP_ID',
+    defaultValue: '',
+  );
+
+  static bool get unsplashEnabled =>
+      unsplashMode.toUpperCase() == 'TRUE' &&
+      unsplashAccessKey.isNotEmpty &&
+      unsplashAccessKey != 'your-unsplash-access-key';
+
+  static bool get pexelsEnabled =>
+      pexelsMode.toUpperCase() == 'TRUE' &&
+      pexelsApiKey.isNotEmpty &&
+      pexelsApiKey != 'your-pexels-api-key';
+
+  static bool get mistralEnabled =>
+      mistralApiKey.isNotEmpty &&
+      mistralApiKey != 'your-mistral-api-key';
 }