TF-3493 Refactor integration test code for performance and maintainability

Signed-off-by: dab246 <tdvu@linagora.com>

integration_test/scenarios/send_email_scenario.dart

@@ -1,40 +1,29 @@
 import 'package:flutter_test/flutter_test.dart';
 import 'package:tmail_ui_user/features/composer/presentation/composer_view.dart';
 
-import '../base/base_scenario.dart';
+import '../base/base_test_scenario.dart';
 import '../robots/composer_robot.dart';
 import '../robots/thread_robot.dart';
-import 'login_with_basic_auth_scenario.dart';
 
-class SendEmailScenario extends BaseScenario {
-  const SendEmailScenario(
-    super.$, 
-    {
-      required this.loginWithBasicAuthScenario,
-      required this.additionalRecipient,
-      required this.subject,
-      required this.content
-    }
-  );
-
-  final LoginWithBasicAuthScenario loginWithBasicAuthScenario;
-  final String additionalRecipient;
-  final String subject;
-  final String content;
+class SendEmailScenario extends BaseTestScenario {
+  const SendEmailScenario(super.$);
 
   @override
-  Future<void> execute() async {
+  Future<void> runTestLogic() async {
+    const additionalRecipient = String.fromEnvironment('ADDITIONAL_MAIL_RECIPIENT');
+    const email = String.fromEnvironment('BASIC_AUTH_EMAIL');
+    const subject = 'Test subject';
+    const content = 'Test content';
+
     final threadRobot = ThreadRobot($);
     final composerRobot = ComposerRobot($);
 
-    await loginWithBasicAuthScenario.execute();
-
     await threadRobot.openComposer();
     await _expectComposerViewVisible();
 
     await composerRobot.grantContactPermission();
 
-    await composerRobot.addRecipient(loginWithBasicAuthScenario.email);
+    await composerRobot.addRecipient(email);
     await composerRobot.addRecipient(additionalRecipient);
     await composerRobot.addSubject(subject);
     await composerRobot.addContent(content);