Qt6 Migration: Merge latest Qt5 devel content and apply migration fixes

- Merged 292 changed files from dlbo snapshot
- Fixed IDL enum collisions (PortType, PdmEventType)
- Fixed Grantlee template for C++11 scoped enums
- Fixed CMake VERSION_GREATER syntax
- Added missing directories (THP, LtsRestClient, etc.)

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

Lts/Tools/Adler/WebSocketSimulator/awss_icd_test.cpp

@@ -21,6 +21,11 @@
 #include <QTime>
 #include <QVBoxLayout>
 
+#include <QFileDialog>
+#include <QFile>
+#include <QMessageBox>
+#include <QSettings>
+
 #include <AdlerJson/generatetelegrams.h>
 #include <AdlerJson/telegrams.h>
 
@@ -41,6 +46,7 @@ ICDTest::ICDTest(QWidget *parent)
   generatePositionReportsPage();
   generateTextMessagePage();
   generateErkundungsergebnissePage();
+  generateFilePage();
   connect(m_ui->tbTrash, &QToolButton::clicked, m_ui->textEdit, &QTextEdit::clear);
   connect(m_ui->tbRestart, &QToolButton::clicked, this, &ICDTest::doRestart);
   connect(&m_heartbeatTimer, &QTimer::timeout, this, &ICDTest::generateConnectionTestMessage);
@@ -1170,6 +1176,57 @@ void ICDTest::generateErkundungsergebnissePage()
   m_ui->toolBox->addItem(widget, tr("Erkundungsergebnisse"));
 }
 
+void ICDTest::selectAndSendJson() {
+    // 1. QSettings initialisieren
+    QSettings settings(QStringLiteral("Legatus"), QStringLiteral("JsonWebsocketSender"));
+
+    // 2. Letzten Pfad auslesen (Standard: leerer String)
+    QString lastDir = settings.value(QStringLiteral("lastDirectory"), QStringLiteral("")).toString();
+
+    // 3. Dialog mit dem letzten Pfad öffnen
+    QString filePath = QFileDialog::getOpenFileName(this,
+        tr("Select JSON file"),
+        lastDir, // Hier wird der gemerkte Pfad übergeben
+        tr("JSON Files (.json);;Text Files (.txt)"));
+
+    if (filePath.isEmpty()) return;
+
+    // 4. Neuen Pfad für das nächste Mal speichern
+    QFileInfo fileInfo(filePath);
+    settings.setValue(QStringLiteral("lastDirectory"), fileInfo.absolutePath());
+
+    // 5. Datei einlesen
+    QFile file(filePath);
+    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        QMessageBox::critical(this, tr("Error"), tr("Couldn't open file"));
+        return;
+    }
+
+    m_pendingData = file.readAll();
+    file.close();
+
+    QString message = QString::fromUtf8(m_pendingData);
+    m_ui->textEdit->append(message);
+    emit messsageToProxy(message);
+
+}
+
+void ICDTest::generateFilePage()
+{
+  QVBoxLayout *lay = new QVBoxLayout(this);
+  QSpacerItem *item = new QSpacerItem(1, 1, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);
+  QWidget *widget = new QWidget(this);
+
+  QPushButton *btnEXAQ = new QPushButton(tr("JSON Files"));
+  connect(btnEXAQ, &QPushButton::clicked, this, &ICDTest::selectAndSendJson);
+  lay->addWidget(btnEXAQ);
+
+  lay->addItem(item);
+  widget->setLayout(lay);
+  m_ui->toolBox->addItem(widget, tr("Load JSON File"));
+}
+
+
 void ICDTest::generateStatusPage()
 {
   QVBoxLayout *lay = new QVBoxLayout(this);