Refactor settings to use FirebaseAuth for sign out

Replaces the previous mock-based authentication in client settings with FirebaseAuth for sign out functionality. Updates dependencies and imports accordingly, and adds firebase_auth to the settings package and firebase_core to the client app. Also includes minor Dart type improvements and dependency reordering.

apps/mobile/packages/features/client/hubs/lib/src/presentation/pages/client_hubs_page.dart

@@ -169,10 +169,10 @@ class ClientHubsPage extends StatelessWidget {
               const SizedBox(height: 16),
               Row(
                 mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                children: [
+                children: <Widget>[
                   Column(
                     crossAxisAlignment: CrossAxisAlignment.start,
-                    children: [
+                    children: <Widget>[
                       Text(
                         t.client_hubs.title,
                         style: const TextStyle(

apps/mobile/packages/features/client/settings/lib/client_settings.dart

@@ -1,5 +1,5 @@
+import 'package:firebase_auth/firebase_auth.dart';
 import 'package:flutter_modular/flutter_modular.dart';
-import 'package:krow_data_connect/krow_data_connect.dart';
 import 'src/data/repositories_impl/settings_repository_impl.dart';
 import 'src/domain/repositories/settings_repository_interface.dart';
 import 'src/domain/usecases/sign_out_usecase.dart';
@@ -8,14 +8,11 @@ import 'src/presentation/pages/client_settings_page.dart';
 
 /// A [Module] for the client settings feature.
 class ClientSettingsModule extends Module {
-  @override
-  List<Module> get imports => [DataConnectModule()];
-
   @override
   void binds(Injector i) {
     // Repositories
     i.addLazySingleton<SettingsRepositoryInterface>(
-      () => SettingsRepositoryImpl(mock: i.get<AuthRepositoryMock>()),
+      () => SettingsRepositoryImpl(firebaseAuth: FirebaseAuth.instance),
     );
 
     // UseCases

apps/mobile/packages/features/client/settings/lib/src/data/repositories_impl/settings_repository_impl.dart

@@ -1,19 +1,23 @@
-import 'package:krow_data_connect/krow_data_connect.dart';
+import 'package:firebase_auth/firebase_auth.dart';
 import '../../domain/repositories/settings_repository_interface.dart';
 
 /// Implementation of [SettingsRepositoryInterface].
 ///
-/// This implementation delegates data access to the [AuthRepositoryMock]
-/// from the `data_connect` package.
+/// This implementation delegates authentication operations to [FirebaseAuth].
 class SettingsRepositoryImpl implements SettingsRepositoryInterface {
-  /// The auth mock from data connect.
-  final AuthRepositoryMock mock;
+  /// The Firebase Auth instance.
+  final FirebaseAuth _firebaseAuth;
 
-  /// Creates a [SettingsRepositoryImpl] with the required [mock].
-  SettingsRepositoryImpl({required this.mock});
+  /// Creates a [SettingsRepositoryImpl] with the required [_firebaseAuth].
+  SettingsRepositoryImpl({required FirebaseAuth firebaseAuth})
+    : _firebaseAuth = firebaseAuth;
 
   @override
-  Future<void> signOut() {
-    return mock.signOut();
+  Future<void> signOut() async {
+    try {
+      await _firebaseAuth.signOut();
+    } catch (e) {
+      throw Exception('Error signing out: ${e.toString()}');
+    }
   }
 }

apps/mobile/packages/features/client/settings/pubspec.yaml

@@ -15,6 +15,7 @@ dependencies:
   flutter_modular: ^6.3.0
   equatable: ^2.0.5
   lucide_icons: ^0.257.0
+  firebase_auth: ^6.1.2
   
   # Architecture Packages
   design_system: