Qt: Fix missing translation of default update channel

src/duckstation-qt/autoupdaterdialog.cpp

@@ -257,11 +257,22 @@ std::vector<std::pair<QString, QString>> AutoUpdaterDialog::getChannelList()
   return ret;
 }
 
-std::string AutoUpdaterDialog::getDefaultTag()
+const char* AutoUpdaterDialog::getDefaultTag()
 {
   return UPDATER_RELEASE_CHANNEL;
 }
 
+QString AutoUpdaterDialog::getTagDisplayName(const std::string_view tag)
+{
+  for (const auto& [name, desc] : s_update_channels)
+  {
+    if (tag == name)
+      return tr(desc);
+  }
+
+  return QString();
+}
+
 std::string AutoUpdaterDialog::getCurrentUpdateTag()
 {
   return Core::GetBaseStringSettingValue("AutoUpdater", "UpdateTag", UPDATER_RELEASE_CHANNEL);

src/duckstation-qt/autoupdaterdialog.h

@@ -34,7 +34,8 @@ public:
   // (channel name, channel display name)
   static std::vector<std::pair<QString, QString>> getChannelList();
 
-  static std::string getDefaultTag();
+  static const char* getDefaultTag();
+  static QString getTagDisplayName(const std::string_view tag);
   static std::string getCurrentUpdateTag();
   static void cleanupAfterUpdate();
   static void warnAboutUnofficialBuild();

src/duckstation-qt/interfacesettingswidget.cpp

@@ -231,7 +231,7 @@ InterfaceSettingsWidget::InterfaceSettingsWidget(SettingsWindow* dialog, QWidget
                                tr("Selects the theme for the application."));
 
     dialog->registerWidgetHelp(m_ui.autoUpdateTag, tr("Update Channel"),
-                               QString::fromStdString(AutoUpdaterDialog::getDefaultTag()),
+                               AutoUpdaterDialog::getTagDisplayName(AutoUpdaterDialog::getDefaultTag()),
                                tr("Selects the channel that will be checked for updates to the application. The "
                                   "<strong>preview</strong> channel contains the latest changes, and may be unstable. "
                                   "The <strong>latest</strong> channel tracks the latest release."));