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_address.dart

@@ -0,0 +1,56 @@
+import '../api/types.dart';
+
+class DeliveryAddress implements Serializable {
+  final int id;
+  final String line1;
+  final String line2;
+  final String postalCode;
+  final String city;
+  final String subdivision;
+  final String countryCode;
+  final double? latitude;
+  final double? longitude;
+  final String formattedAddress;
+
+  const DeliveryAddress({
+    required this.id,
+    required this.line1,
+    required this.line2,
+    required this.postalCode,
+    required this.city,
+    required this.subdivision,
+    required this.countryCode,
+    this.latitude,
+    this.longitude,
+    required this.formattedAddress,
+  });
+
+  factory DeliveryAddress.fromJson(Map<String, dynamic> json) {
+    return DeliveryAddress(
+      id: json['id'] as int,
+      line1: json['line1'] as String,
+      line2: json['line2'] as String,
+      postalCode: json['postalCode'] as String,
+      city: json['city'] as String,
+      subdivision: json['subdivision'] as String,
+      countryCode: json['countryCode'] as String,
+      latitude: json['latitude'] as double?,
+      longitude: json['longitude'] as double?,
+      formattedAddress: json['formattedAddress'] as String,
+    );
+  }
+
+  @override
+  Map<String, Object?> toJson() => {
+    'id': id,
+    'line1': line1,
+    'line2': line2,
+    'postalCode': postalCode,
+    'city': city,
+    'subdivision': subdivision,
+    'countryCode': countryCode,
+    'latitude': latitude,
+    'longitude': longitude,
+    'formattedAddress': formattedAddress,
+  };
+}