feat: implement emergency contact management with Firebase integration and relationship type handling

apps/mobile/packages/domain/lib/krow_domain.dart

@@ -52,6 +52,7 @@ export 'src/entities/financial/staff_payment.dart';
 // Profile
 export 'src/entities/profile/staff_document.dart';
 export 'src/entities/profile/attire_item.dart';
+export 'src/entities/profile/relationship_type.dart';
 
 // Ratings & Penalties
 export 'src/entities/ratings/staff_rating.dart';
@@ -77,3 +78,6 @@ export 'src/entities/home/reorder_item.dart';
 // Availability
 export 'src/entities/availability/availability_slot.dart';
 export 'src/entities/availability/day_availability.dart';
+
+// Adapters
+export 'src/adapters/profile/emergency_contact_adapter.dart';

apps/mobile/packages/domain/lib/src/adapters/profile/emergency_contact_adapter.dart

@@ -0,0 +1,19 @@
+import '../../entities/profile/emergency_contact.dart';
+
+/// Adapter for [EmergencyContact] to map data layer values to domain entity.
+class EmergencyContactAdapter {
+  /// Maps primitive values to [EmergencyContact].
+  static EmergencyContact fromPrimitives({
+    required String id,
+    required String name,
+    required String phone,
+    String? relationship,
+  }) {
+    return EmergencyContact(
+      id: id,
+      name: name,
+      phone: phone,
+      relationship: EmergencyContact.stringToRelationshipType(relationship),
+    );
+  }
+}

apps/mobile/packages/domain/lib/src/entities/profile/emergency_contact.dart

@@ -1,4 +1,5 @@
 import 'package:equatable/equatable.dart';
+import 'relationship_type.dart';
 
 /// Represents an emergency contact for a user.
 ///
@@ -6,19 +7,69 @@ import 'package:equatable/equatable.dart';
 class EmergencyContact extends Equatable {
 
   const EmergencyContact({
+    required this.id,
     required this.name,
     required this.relationship,
     required this.phone,
   });
+
+  /// Unique identifier.
+  final String id;
+
   /// Full name of the contact.
   final String name;
 
   /// Relationship to the user (e.g. "Spouse", "Parent").
-  final String relationship;
+  final RelationshipType relationship;
 
   /// Phone number.
   final String phone;
 
   @override
-  List<Object?> get props => <Object?>[name, relationship, phone];
-}
+  List<Object?> get props => <Object?>[id, name, relationship, phone];
+
+  /// Returns a copy of this [EmergencyContact] with the given fields replaced.
+  EmergencyContact copyWith({
+    String? id,
+    String? name,
+    String? phone,
+    RelationshipType? relationship,
+  }) {
+    return EmergencyContact(
+      id: id ?? this.id,
+      name: name ?? this.name,
+      phone: phone ?? this.phone,
+      relationship: relationship ?? this.relationship,
+    );
+  }
+
+  /// Returns an empty [EmergencyContact].
+  static EmergencyContact empty() {
+    return const EmergencyContact(
+      id: '',
+      name: '',
+      phone: '',
+      relationship: RelationshipType.family,
+    );
+  }
+
+  /// Converts a string value to a [RelationshipType].
+  static RelationshipType stringToRelationshipType(String? value) {
+    if (value != null) {
+      final strVal = value.toUpperCase();
+      switch (strVal) {
+        case 'FAMILY':
+          return RelationshipType.family;
+        case 'SPOUSE':
+          return RelationshipType.spouse;
+        case 'FRIEND':
+          return RelationshipType.friend;
+        case 'OTHER':
+          return RelationshipType.other;
+        default:
+          return RelationshipType.other;
+      }
+    }
+    return RelationshipType.other;
+  }
+}

apps/mobile/packages/domain/lib/src/entities/profile/relationship_type.dart

@@ -0,0 +1,6 @@
+enum RelationshipType {
+  family,
+  spouse,
+  friend,
+  other,
+}