fix(ui): prevent text style from being reset during retranslation

Fixes #3805

src/widget/form/settings/userinterfaceform.cpp

@@ -310,8 +310,15 @@ void UserInterfaceForm::on_themeColorCBox_currentIndexChanged(int)
  */
 void UserInterfaceForm::retranslateUi()
 {
+    // Block signals during translation to prevent settings change
+    RecursiveSignalBlocker signalBlocker{this};
+
     bodyUI->retranslateUi(this);
 
+    // Restore text style index once translation is complete
+    bodyUI->textStyleComboBox->setCurrentIndex(
+        static_cast<int>(Settings::getInstance().getStylePreference()));
+
     QStringList colorThemes(Style::getThemeColorNames());
     for (int i = 0; i < colorThemes.size(); ++i)
     {