Initial commit: Plan B Logistics Flutter app with dark mode and responsive design

Implements complete refactor of Ionic Angular logistics app to Flutter/Dart with:
- Svrnty dark mode console theme (Material Design 3)
- Responsive layouts (mobile, tablet, desktop) following FRONTEND standards
- CQRS API integration with Result<T> error handling
- OAuth2/OIDC authentication support (mocked for initial testing)
- Delivery route and delivery management features
- Multi-language support (EN/FR) with i18n
- Native integrations (camera, phone calls, maps)
- Strict typing throughout codebase
- Mock data for UI testing without backend

Follows all FRONTEND style guides, design patterns, and conventions.
App is running in dark mode and fully responsive across all device sizes.

Co-Authored-By: Claude <noreply@anthropic.com>

lib/models/delivery_contact.dart

@@ -0,0 +1,32 @@
+import '../api/types.dart';
+
+class DeliveryContact implements Serializable {
+  final String firstName;
+  final String? lastName;
+  final String fullName;
+  final String? phoneNumber;
+
+  const DeliveryContact({
+    required this.firstName,
+    this.lastName,
+    required this.fullName,
+    this.phoneNumber,
+  });
+
+  factory DeliveryContact.fromJson(Map<String, dynamic> json) {
+    return DeliveryContact(
+      firstName: json['firstName'] as String,
+      lastName: json['lastName'] as String?,
+      fullName: json['fullName'] as String,
+      phoneNumber: json['phoneNumber'] as String?,
+    );
+  }
+
+  @override
+  Map<String, Object?> toJson() => {
+    'firstName': firstName,
+    'lastName': lastName,
+    'fullName': fullName,
+    'phoneNumber': phoneNumber,
+  };
+}