fix

app/ui/views/login_view.py

@@ -2,7 +2,7 @@ from PySide6.QtWidgets import (
     QWidget, QLabel, QLineEdit, QPushButton, QVBoxLayout, QMessageBox,
     QHBoxLayout, QSpacerItem, QSizePolicy, QComboBox
 )
-from PySide6.QtCore import Qt
+from PySide6.QtCore import Qt, QTimer
 from ..widgets.validation_input import ValidationInput
 from common_lib.utils.validators import (
     validate_username as common_validate_username,
@@ -167,15 +167,19 @@ class LoginView(QWidget):
         self.reg_password_input.textChanged.connect(self.confirm_password_input.on_text_changed)
 
     def _update_window_title(self):
-        window = self.window()
-        if not window:
-            return
+        def set_title():
+            window = self.window()
+            if not window:
+                return
 
-        if self.is_registration:
-            title = f"{localizer.translate('Регистрация')} | {config.APP_HEADER}"
-        else:
-            title = f"{localizer.translate('Авторизация')} | {config.APP_HEADER}"
-        window.setWindowTitle(title)
+            if self.is_registration:
+                title = f"{localizer.translate('Регистрация')} | {config.APP_HEADER}"
+            else:
+                title = f"{localizer.translate('Авторизация')} | {config.APP_HEADER}"
+            window.setWindowTitle(title)
+
+        # Откладываем выполнение, чтобы `self.window()` уже был готов
+        QTimer.singleShot(0, set_title)
 
     def render_form(self):
         self.clear_form()