Refactor: three XPL2 ports, EchoServer class, dark debug console, qmllint clean

- Xpl2Client: replace single port with commandPort/imagingPort/statusPort (9110/9111/9112)
- Mock server: extract EchoServer class from lambda-based listenOn()
- Demo: dark debug console matching BobinkQtOpcUa style, 2-column connection layout
- Fix qmlls module resolution via IMPORT_PATH in qt_add_qml_module()
- Add pragma ComponentBehavior: Bound, fix all qmllint warnings

1 files changed, 50 insertions, 0 deletions

diff --git a/mock-server/EchoServer.cpp b/mock-server/EchoServer.cpp
new file mode 100644
index 0000000..43fc6f9
--- /dev/null
+++ b/mock-server/EchoServer.cpp
@@ -0,0 +1,50 @@
+/**
+ * @file   EchoServer.cpp
+ * @brief  Simple TCP echo server for a single port.
+ */
+#include "EchoServer.h"
+
+#include <QTcpSocket>
+
+EchoServer::EchoServer (quint16 port, const char *name, QObject *parent)
+    : QTcpServer (parent), m_name (name), m_port (port)
+{
+  connect (this, &QTcpServer::newConnection, this,
+           &EchoServer::onNewConnection);
+
+  if (!listen (QHostAddress::Any, port))
+    qCritical ("Failed to listen on %s port %d: %s", m_name, m_port,
+               qPrintable (errorString ()));
+  else
+    qInfo ("Listening on %s port %d", m_name, m_port);
+}
+
+void
+EchoServer::onNewConnection ()
+{
+  while (auto *sock = nextPendingConnection ())
+    {
+      qInfo ("[%s:%d] client connected", m_name, m_port);
+      connect (sock, &QTcpSocket::readyRead, this,
+               &EchoServer::onClientReadyRead);
+      connect (sock, &QTcpSocket::disconnected, this,
+               &EchoServer::onClientDisconnected);
+    }
+}
+
+void
+EchoServer::onClientReadyRead ()
+{
+  auto *sock = qobject_cast<QTcpSocket *> (sender ());
+  QByteArray data = sock->readAll ();
+  qInfo ("[%s:%d] echo %lld bytes", m_name, m_port, data.size ());
+  sock->write (data);
+}
+
+void
+EchoServer::onClientDisconnected ()
+{
+  auto *sock = qobject_cast<QTcpSocket *> (sender ());
+  qInfo ("[%s:%d] client disconnected", m_name, m_port);
+  sock->deleteLater ();
+}