Method setupBorder

app/src/Platform/CSD.cpp:999–1042

* @brief Creates the 1px window border as four scene-graph edges (no painter, no FBO). */

 * @brief Creates the 1px window border as four scene-graph edges (no painter, no FBO).
 */
void Window::setupBorder()
{
  auto* quickWindow = qobject_cast<QQuickWindow*>(m_window.data());
  if (!quickWindow)
    return;

  QQmlEngine* engine = qmlEngine(quickWindow);
  if (!engine)
    return;

  static const char* qmlCode = R"(
    import QtQuick

    Item {
      id: border
      readonly property color stroke: "#73666666"
      Rectangle { color: border.stroke; height: 1; anchors { left: parent.left; right: parent.right; top: parent.top } }
      Rectangle { color: border.stroke; height: 1; anchors { left: parent.left; right: parent.right; bottom: parent.bottom } }
      Rectangle { color: border.stroke; width: 1; anchors { top: parent.top; bottom: parent.bottom; left: parent.left } }
      Rectangle { color: border.stroke; width: 1; anchors { top: parent.top; bottom: parent.bottom; right: parent.right } }
    }
  )";

  QQmlComponent component(engine);
  component.setData(qmlCode, QUrl());
  if (component.isError()) {
    for (const auto& error : component.errors())
      qWarning() << "CSD border QML error:" << error.toString();

    return;
  }

  m_border = qobject_cast<QQuickItem*>(component.create());
  if (!m_border)
    return;

  m_border->setParentItem(quickWindow->contentItem());
  m_border->setZ(1000000);

  connect(quickWindow, &QQuickWindow::widthChanged, this, &Window::updateBorderGeometry);
  connect(quickWindow, &QQuickWindow::heightChanged, this, &Window::updateBorderGeometry);

  updateBorderGeometry();
}

/**
 * @brief Creates and configures the title bar.