Add test for LtsTimeline timeline_widget.cpp

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-benchmark/tests/test_lts_timeline_widget.cpp

@@ -0,0 +1,21 @@
+#include "qt6-after/qt6-migrated-legatus/Lts/Common/LtsTimeline/timeline_widget.h"
+
+#include <gtest/gtest.h>
+
+TEST(LtsTimelineWidgetTest, HeaderCompiles)
+{
+    // Verify header compiles without errors
+    EXPECT_TRUE(true);
+}
+
+TEST(LtsTimelineWidgetTest, CanInstantiate)
+{
+    // Basic instantiation test if class is instantiable
+    // Add specific instantiation code if class can be constructed
+}
+
+TEST(LtsTimelineWidgetTest, NamespaceExists)
+{
+    // Verify namespace exists
+    // Add namespace verification if applicable
+}