TF-3894 Fix blank email content when opening email

lib/features/base/base_controller.dart

@@ -421,11 +421,12 @@ abstract class BaseController extends GetxController
     BuildContext context,
     Session? session,
     AccountId? accountId,
+    String ownEmailAddress,
   ) {
     if (PlatformInfo.isMobile) {
       showLogoutConfirmDialog(
         context: context,
-        userAddress: session?.getOwnEmailAddressOrEmpty() ?? '',
+        userAddress: ownEmailAddress,
         onConfirmAction: () => _handleLogoutAction(session, accountId),
       );
     } else {

lib/features/base/mixin/own_email_address_mixin.dart

@@ -0,0 +1,42 @@
+import 'package:core/utils/app_logger.dart';
+import 'package:get/get.dart';
+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+import 'package:jmap_dart_client/jmap/identities/identity.dart';
+import 'package:model/extensions/session_extension.dart';
+import 'package:tmail_ui_user/features/email/presentation/utils/email_utils.dart';
+
+mixin OwnEmailAddressMixin {
+  static const String emptyOwnEmailAddress = '';
+
+  final RxString ownEmailAddress = RxString('');
+  Session? sessionCurrent;
+
+  void synchronizeOwnEmailAddress(String emailAddress) {
+    log('$runtimeType::synchronizeOwnEmailAddress:OwnEmailAddress = ${ownEmailAddress.value}, NewEmailAddress = $emailAddress');
+    if (ownEmailAddress.value.trim().isNotEmpty) return;
+    ownEmailAddress.value = emailAddress;
+  }
+
+  void updateOwnEmailAddressFromIdentities(List<Identity> listIdentities) {
+    if (ownEmailAddress.value.trim().isNotEmpty) return;
+
+    if (listIdentities.isEmpty) {
+      synchronizeOwnEmailAddress(emptyOwnEmailAddress);
+      ownEmailAddress.refresh();
+      return;
+    }
+
+    final identityEmailAddress = listIdentities.firstOrNull?.email ?? '';
+    final domain = EmailUtils.getDomainByEmailAddress(identityEmailAddress);
+    final userEmailAddress =
+        sessionCurrent?.generateOwnEmailAddressFromDomain(domain) ?? '';
+    log('$runtimeType::updateOwnEmailAddressFromIdentities: UserEmailAddress = $userEmailAddress');
+
+    if (userEmailAddress.isNotEmpty) {
+      synchronizeOwnEmailAddress(userEmailAddress);
+    } else {
+      synchronizeOwnEmailAddress(emptyOwnEmailAddress);
+      ownEmailAddress.refresh();
+    }
+  }
+}