feat: Add sign out confirmation dialog and success snackbar

Introduces a confirmation dialog before signing out in the client settings page and displays a snackbar upon successful sign out. Also updates a slivers list to use explicit type annotation for consistency.

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

@@ -59,7 +59,7 @@ class ClientHubsPage extends StatelessWidget {
             body: Stack(
               children: <Widget>[
                 CustomScrollView(
-                  slivers: [
+                  slivers: <Widget>[
                     _buildAppBar(context),
                     SliverPadding(
                       padding: const EdgeInsets.symmetric(

apps/mobile/packages/features/client/settings/lib/src/presentation/pages/client_settings_page.dart

@@ -23,6 +23,9 @@ class ClientSettingsPage extends StatelessWidget {
       child: BlocListener<ClientSettingsBloc, ClientSettingsState>(
         listener: (context, state) {
           if (state is ClientSettingsSignOutSuccess) {
+            ScaffoldMessenger.of(context).showSnackBar(
+              const SnackBar(content: Text('Signed out successfully')),
+            );
             Modular.to.navigate('/');
           }
           if (state is ClientSettingsError) {

apps/mobile/packages/features/client/settings/lib/src/presentation/widgets/client_settings_page/settings_actions.dart

@@ -28,9 +28,7 @@ class SettingsActions extends StatelessWidget {
                 text: labels.log_out,
                 onPressed: state is ClientSettingsLoading
                     ? null
-                    : () => BlocProvider.of<ClientSettingsBloc>(
-                        context,
-                      ).add(const ClientSettingsSignOutRequested()),
+                    : () => _showSignOutDialog(context),
               );
             },
           ),
@@ -38,4 +36,45 @@ class SettingsActions extends StatelessWidget {
       ),
     );
   }
+
+  /// Shows a confirmation dialog for signing out.
+  Future<void> _showSignOutDialog(BuildContext context) {
+    return showDialog(
+      context: context,
+      builder: (BuildContext context) => AlertDialog(
+        backgroundColor: UiColors.bgPopup,
+        elevation: 0,
+        shape: RoundedRectangleBorder(borderRadius: UiConstants.radiusLg),
+        title: Text(
+          t.client_settings.profile.log_out,
+          style: UiTypography.headline3m.textPrimary,
+        ),
+        content: Text(
+          'Are you sure you want to log out?',
+          style: UiTypography.body2r.textSecondary,
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(context).pop(),
+            child: Text(
+              t.common.cancel,
+              style: UiTypography.buttonM.textSecondary,
+            ),
+          ),
+          TextButton(
+            onPressed: () {
+              Navigator.of(context).pop();
+              BlocProvider.of<ClientSettingsBloc>(
+                context,
+              ).add(const ClientSettingsSignOutRequested());
+            },
+            child: Text(
+              t.client_settings.profile.log_out,
+              style: UiTypography.buttonM.textError,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
 }