chore: Replace TextButton with UiButton.secondary in settings actions

Updated the log out and cancel actions in SettingsActions to use UiButton.secondary instead of TextButton for consistency with the UI component library.

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

@@ -69,26 +69,20 @@ class SettingsActions extends StatelessWidget {
         ),
         actions: <Widget>[
           // Log out button
-          TextButton(
+          UiButton.secondary(
+            text: t.client_settings.profile.log_out,
             onPressed: () {
               Modular.to.pop();
               BlocProvider.of<ClientSettingsBloc>(
                 context,
               ).add(const ClientSettingsSignOutRequested());
             },
-            child: Text(
-              t.client_settings.profile.log_out,
-              style: UiTypography.buttonM.textSecondary,
-            ),
           ),
 
           // Cancel button
-          TextButton(
+          UiButton.secondary(
+            text: t.common.cancel,
             onPressed: () => Modular.to.pop(),
-            child: Text(
-              t.common.cancel,
-              style: UiTypography.buttonM.textPrimary,
-            ),
           ),
         ],
       ),