Qt6 migration: Fix BUILD_RTI=OFF build errors in TrainingAreaBase

- training_area_telegrams.cpp: Fixed QJsonObject initializer syntax (Qt6 requires {{}} not ({}))
- training_area_telegrams.cpp: Fixed fromJson() methods to access m_* members directly
- training_area_telegrams.cpp: Fixed brace mismatches in multiple toJson() methods
- training_area_telegrams.h: Changed Header struct to public members for consistency
- tx_mixin.cpp: Fixed getEquipmentNumber() template for direct member access
- lts_coordinate.cpp: Added missing #include <iomanip>
- MIGRATION_STATUS.md: Added migration progress tracking document

C++17 constraint enforced due to RTI Connext DDS 7.7.0 incompatibility with C++20+

Build status: BUILD_RTI=OFF successful (0 errors, warnings only)

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

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/acl_dialog.h

@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <QWidget>
+#include <QtWidgets/QWidget>
 
 #include "acl_dialog_model.h"
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/group_edit_dialog.cpp

@@ -6,7 +6,7 @@
 
 #include "group_edit_member_of_model.h"
 
-#include <QMenu>
+#include <QtWidgets/QMenu>
 #include <LtsWidgets/lts_message_dialog.h>
 #include <OperatorManagement/opm_translation.h>
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/group_edit_dialog.h

@@ -9,7 +9,7 @@
 #include <OperatorManagement/opm_dtc.h>
 #include <OperatorManagement/opm_ftc.h>
 
-#include <QVector>
+#include <QtCore/QVector>
 
 namespace Ui
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/group_edit_member_of_model.cpp

@@ -5,9 +5,9 @@
 #include <nglwidgets/ngltreeitem.h>
 #include <LtsUtilsSettings/settings.h>
 #include <LtsUtils/LtsUtilsCore/dds_vector.h>
-#include <QCoreApplication>
-#include <QSet>
-#include <QVector>
+#include <QtCore/QCoreApplication>
+#include <QtCore/QSet>
+#include <QtCore/QVector>
 
 namespace OperatorManagement
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/group_model.cpp

@@ -6,7 +6,7 @@
 
 #include <ngltools/ngltools_dtg.h>
 #include <OperatorManagement/opm_translation.h>
-#include <QIcon>
+#include <QtGui/QIcon>
 
 namespace OperatorManagement
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/operator_dialog.cpp

@@ -12,7 +12,7 @@
 #include <Plugins/OperatorManagement/opm_data_plugin_interface.h>
 
 #include <LtsPrinting/printing.h>
-#include <QTreeView>
+#include <QtWidgets/QTreeView>
 
 namespace OperatorManagement
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/operator_dialog.h

@@ -14,7 +14,7 @@
 #include <LtsWidgets/lts_dialog.h>
 #include <LtsUtils/LtsUtilsGui/LtsUtilsGuiDds/request_helper.h>
 
-#include <QWidget>
+#include <QtWidgets/QWidget>
 
 
 namespace Ui

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/operator_edit_dialog.cpp

@@ -16,12 +16,12 @@
 #include <ParticipantManagement/Data/ppm_data_plugin.h>
 #include <Plugins/ExerciseManagement/Data/exm_data_plugin.h>
 
-#include <QListWidget>
-#include <QImage>
-#include <QFile>
-#include <QTimer>
-#include <QFileDialog>
-#include <QMenu>
+#include <QtWidgets/QListWidget>
+#include <QtGui/QImage>
+#include <QtCore/QFile>
+#include <QtCore/QTimer>
+#include <QtWidgets/QFileDialog>
+#include <QtWidgets/QMenu>
 
 #include "group_edit_dialog.h"
 

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/operator_edit_visible_parties_model.h

@@ -8,7 +8,7 @@
 
 #include <LtsWidgets/lts_checkable_table_model.h>
 
-#include <QPair>
+#include <QtCore/QPair>
 
 namespace OperatorManagement
 {

qt6-after/qt6-migrated-legatus/Lts/Plugins/OperatorManagement/Gui/OperatorEdit/preset_dialog.h

@@ -3,7 +3,7 @@
 
 #pragma once
 
-#include <QWidget>
+#include <QtWidgets/QWidget>
 
 #include "group_model.h"