TF-3611 E2E Trash mailbox empty and recover

integration_test/robots/mailbox_menu_robot.dart

@@ -125,4 +125,16 @@ class MailboxMenuRobot extends CoreRobot {
     getBinding<QuotasController>()?.reloadQuota();
     await $.pumpAndSettle(duration: const Duration(seconds: 2));
   }
+
+  Future<void> tapRecoverDeletedMessages() async {
+    await $(AppLocalizations().recoverDeletedMessages).tap();
+  }
+
+  Future<void> tapConfirmRecoverDeletedMessages() async {
+    if (await $.native.isPermissionDialogVisible(timeout: const Duration(seconds: 2))) {
+      await $.native.grantPermissionWhenInUse();
+    }
+    await $(AppLocalizations().restore).tap();
+    await $.pumpAndSettle();
+  }
 }

integration_test/robots/thread_robot.dart

@@ -82,4 +82,8 @@ class ThreadRobot extends CoreRobot {
     await $(name).tap();
     await $.pumpAndSettle();
   }
+
+  Future<void> confirmEmptyTrash() async {
+    await $(AppLocalizations().delete_all).tap();
+  }
 }

integration_test/scenarios/mailbox/empty_and_recover_trash_scenario.dart

@@ -0,0 +1,61 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:model/mailbox/presentation_mailbox.dart';
+import 'package:tmail_ui_user/features/base/widget/clean_messages_banner.dart';
+import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
+
+import '../../base/base_test_scenario.dart';
+import '../../models/provisioning_email.dart';
+import '../../robots/mailbox_menu_robot.dart';
+import '../../robots/thread_robot.dart';
+
+class EmptyAndRecoverTrashScenario extends BaseTestScenario {
+  const EmptyAndRecoverTrashScenario(super.$);
+  
+  @override
+  Future<void> runTestLogic() async {
+    const toEmail = String.fromEnvironment('BASIC_AUTH_EMAIL');
+    const subject = 'trash and recover';
+
+    final threadRobot = ThreadRobot($);
+    final mailboxMenuRobot = MailboxMenuRobot($);
+    final appLocalizations = AppLocalizations();
+
+    await provisionEmail(
+      [ProvisioningEmail(
+        toEmail: toEmail,
+        subject: subject,
+        content: '',
+      )],
+      folderLocationRole: PresentationMailbox.roleTrash,
+    );
+
+    await threadRobot.openMailbox();
+    await mailboxMenuRobot.openFolderByName(
+      appLocalizations.trashMailboxDisplayName,
+    );
+    await threadRobot.tapEmptyTrashBanner();
+    await threadRobot.confirmEmptyTrash();
+    await _expectTrashBannerInvisible();
+
+    await threadRobot.openMailbox();
+    await mailboxMenuRobot.longPressMailboxWithName(
+      appLocalizations.trashMailboxDisplayName,
+    );
+    await mailboxMenuRobot.tapRecoverDeletedMessages();
+    await mailboxMenuRobot.tapConfirmRecoverDeletedMessages();
+    await threadRobot.openMailbox();
+    await mailboxMenuRobot.openFolderByName(
+      appLocalizations.recoveredMailboxDisplayName,
+    );
+    await _expectEmailWithSubjectVisible(subject);
+  }
+  
+  Future<void> _expectTrashBannerInvisible() async {
+    await $(#clean_message_banner_not_visible).waitUntilExists();
+    expect($(CleanMessagesBanner).visible, false);
+  }
+
+  Future<void> _expectEmailWithSubjectVisible(String subject) async {
+    await expectViewVisible($(subject));
+  }
+}

integration_test/tests/mailbox/empty_and_recover_trash_test.dart

@@ -0,0 +1,9 @@
+import '../../base/test_base.dart';
+import '../../scenarios/mailbox/empty_and_recover_trash_scenario.dart';
+
+void main() {
+  TestBase().runPatrolTest(
+    description: 'Should empty and recover trash successfully',
+    scenarioBuilder: ($) => EmptyAndRecoverTrashScenario($),
+  );
+}

lib/features/thread/presentation/thread_view.dart

@@ -237,7 +237,9 @@ class ThreadView extends GetWidget<ThreadController>
                             ),
                           );
                         } else {
-                          return const SizedBox.shrink();
+                          return const SizedBox.shrink(
+                            key: Key('clean_message_banner_not_visible'),
+                          );
                         }
                       }),
                       if (!controller.responsiveUtils.isDesktop(context))