Qt6 Migration: BUILD_RTI guards und CMake fixes

- BUILD_RTI conditional compilation für RTI Connext DDS dependencies
- Namespace fixes in core_dtc.h (Core:: → DDS::Core::)
- CMakeLists.txt: BUILD_RTI option und conditional dependencies
- Handler minelayer: namespace closing mit BUILD_RTI guard
- Build erfolgreich mit BUILD_RTI=OFF validiert

Signed-off-by: Torsten Wierschin <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-legatus/tests/test_timelineindicator.cpp

@@ -11,16 +11,21 @@ class TimelineIndicatorTest : public ::testing::Test
   protected:
     void SetUp() override
     {
-        int argc = 1;
-        char* argv[] = {const_cast<char*>("test")};
-        qApp = new QApplication(argc, argv);
+        static int argc = 1;
+        static char* argv[] = {const_cast<char*>("test")};
+        if (!qApp)
+        {
+            m_app = std::make_unique<QApplication>(argc, argv);
+        }
     }
 
     void TearDown() override
     {
-        delete qApp;
-        qApp = nullptr;
+        m_app.reset();
     }
+
+  private:
+    std::unique_ptr<QApplication> m_app;
 };
 
 TEST(TimelineIndicatorTest, ConstructorCreatesValidIndicator)
@@ -35,17 +40,17 @@ TEST(TimelineIndicatorTest, SlotZoomChangesIndex)
     QWidget parent;
     TimelineIndicator indicator(&parent);
 
-    int initialIndex = indicator.m_cbZoomLevel->currentIndex();
+    int initialIndex = indicator.zoomLevelComboBox()->currentIndex();
     indicator.slotZoom();
 
     // Zoom out should decrease index (if not already at 0)
     if (initialIndex > 0)
     {
-        EXPECT_EQ(indicator.m_cbZoomLevel->currentIndex(), initialIndex - 1);
+        EXPECT_EQ(indicator.zoomLevelComboBox()->currentIndex(), initialIndex - 1);
     }
     else
     {
-        EXPECT_EQ(indicator.m_cbZoomLevel->currentIndex(), 0);
+        EXPECT_EQ(indicator.zoomLevelComboBox()->currentIndex(), 0);
     }
 }
 
@@ -54,14 +59,14 @@ TEST(TimelineIndicatorTest, SlotUnzoomChangesIndex)
     QWidget parent;
     TimelineIndicator indicator(&parent);
 
-    int initialIndex = indicator.m_cbZoomLevel->currentIndex();
-    int maxIndex = indicator.m_cbZoomLevel->count() - 1;
+    int initialIndex = indicator.zoomLevelComboBox()->currentIndex();
+    int maxIndex = indicator.zoomLevelComboBox()->count() - 1;
 
     // Set to a lower index to allow unzoom
-    indicator.m_cbZoomLevel->setCurrentIndex(1);
+    indicator.zoomLevelComboBox()->setCurrentIndex(1);
     indicator.slotUnzoom();
 
-    EXPECT_EQ(indicator.m_cbZoomLevel->currentIndex(), 2);
+    EXPECT_EQ(indicator.zoomLevelComboBox()->currentIndex(), 2);
 }
 
 } // namespace LtsTimelineClassic