Final fixes for TTD Events widget - handle null pointers and complete specialized widget implementation

Co-authored-by: xusheng6 <[email protected]>

Author: Copilot

ui/ttdeventswidget.cpp

@@ -363,7 +363,10 @@ void TTDEventsQueryWidget::performQuery()
 	}
 
 	updateStatus("Querying all TTD events...");
-	m_queryButton->setEnabled(false);
+	
+	// Only disable button if it exists (AllEvents widgets have buttons, specialized don't)
+	if (m_queryButton)
+		m_queryButton->setEnabled(false);
 
 	try
 	{
@@ -372,16 +375,25 @@ void TTDEventsQueryWidget::performQuery()
 
 		updateStatus(QString("Query completed. Loaded %1 total events.").arg(m_allEvents.size()));
 
-		// Filter and display events based on current checkbox settings
-		filterAndDisplayEvents();
+		// Filter and display events based on widget type
+		if (m_widgetType == AllEvents)
+		{
+			filterAndDisplayEvents();
+		}
+		else
+		{
+			filterAndDisplaySpecializedEvents();
+		}
 	}
 	catch (const std::exception& e)
 	{
 		updateStatus(QString("Query failed: %1").arg(e.what()));
 		QMessageBox::warning(this, "TTD Events Query Error", QString("Failed to query TTD events:\n%1").arg(e.what()));
 	}
 
-	m_queryButton->setEnabled(true);
+	// Only re-enable button if it exists
+	if (m_queryButton)
+		m_queryButton->setEnabled(true);
 }
 
 void TTDEventsQueryWidget::filterAndDisplayEvents()