Merge feature/qt6-migration-basis-modules-services into feature/qt6-migration-basis-modules

Resolves 17 conflicts against legacy Qt5 semantics; validates with BUILD_RTI=ON BUILD_GRANTLEE=ON.

qt6-after/qt6-migrated-legatus/.forward-declarations/include/Services/PresentationManagement/pre_ftc.h

@@ -0,0 +1,59 @@
+/**
+ * @file pre_ftc.h
+ * @brief Stub-Header für PresentationManagement FTC (Filter Topic Client)
+ *
+ * Dieser Header ist ein Stub für den von RTI DDS Generator erzeugten Header.
+ * Ermöglicht Build ohne echte DDS-Codegenerierung wenn BUILD_RTI=OFF.
+ */
+
+#pragma once
+
+#include <functional>
+#include <memory>
+
+namespace PresentationManagement
+{
+
+// Forward declarations
+struct Presentation;
+struct PresentationContent;
+struct GetPresentationContentReply;
+
+namespace Interface
+{
+
+/**
+ * @brief Ftc - Filter Topic Client für Presentation Management
+ *
+ * Stub-Implementation für DDS-generierten FTC.
+ * Gibt nullptr zurück da keine echte DDS-Verbindung verfügbar.
+ */
+class Ftc
+{
+  public:
+    using ModifyTypeReplyHandler = std::function<void(bool success)>;
+
+    virtual ~Ftc() = default;
+
+    /**
+     * @brief Factory-Methode zur Erstellung einer Ftc-Instanz
+     * @param connector DDS-Connector (wird im Stub ignoriert)
+     * @return Shared Pointer zur Ftc-Instanz (nullptr im Stub)
+     */
+    static std::shared_ptr<Ftc> create(void* /*connector*/)
+    {
+        return nullptr; // Stub returns nullptr - actual implementation requires DDS
+    }
+
+    // PresentationModify Reply Handler
+    virtual void presentationModifyReply(ModifyTypeReplyHandler /*handler*/) = 0;
+
+    // PresentationRemove Reply Handler
+    virtual void presentationRemoveReply(ModifyTypeReplyHandler /*handler*/) = 0;
+
+    // GetPresentationContent Reply Handler
+    virtual void getPresentationContentReply(const GetPresentationContentReply& /*reply*/) = 0;
+};
+
+} // namespace Interface
+} // namespace PresentationManagement