all: ensure QObject ownership is Cpp when required

src/core/proxywindow.cpp

@@ -1,6 +1,7 @@
 #include "proxywindow.hpp"
 
 #include <qobject.h>
+#include <qqmlengine.h>
 #include <qqmllist.h>
 #include <qquickitem.h>
 #include <qquickwindow.h>
@@ -13,8 +14,10 @@
 #include "region.hpp"
 #include "reload.hpp"
 
-ProxyWindowBase::ProxyWindowBase(QObject* parent): Reloadable(parent) {
-	this->mContentItem = new QQuickItem(); // NOLINT
+ProxyWindowBase::ProxyWindowBase(QObject* parent)
+    : Reloadable(parent)
+    , mContentItem(new QQuickItem()) {
+	QQmlEngine::setObjectOwnership(this->mContentItem, QQmlEngine::CppOwnership);
 	this->mContentItem->setParent(this);
 
 	QObject::connect(this, &ProxyWindowBase::widthChanged, this, &ProxyWindowBase::onWidthChanged);
@@ -34,7 +37,6 @@ void ProxyWindowBase::onReload(QObject* oldInstance) {
 	Reloadable::reloadRecursive(this->mContentItem, oldInstance);
 
 	this->mContentItem->setParentItem(this->window->contentItem());
-
 	this->mContentItem->setWidth(this->width());
 	this->mContentItem->setHeight(this->height());
 

src/core/variants.cpp

@@ -104,6 +104,8 @@ void Variants::updateVariants() {
 				continue;
 			}
 
+			QQmlEngine::setObjectOwnership(instance, QQmlEngine::CppOwnership);
+
 			instance->setParent(this);
 			this->instances.insert(variant, instance);
 		}

src/io/socket.cpp

@@ -187,6 +187,8 @@ void SocketServer::onNewConnection() {
 			return;
 		}
 
+		QQmlEngine::setObjectOwnership(instance, QQmlEngine::CppOwnership);
+
 		this->mSockets.append(instance);
 		instance->setParent(this);
 

src/wayland/session_lock.cpp

@@ -157,6 +157,7 @@ SessionLockSurface::SessionLockSurface(QObject* parent)
     : Reloadable(parent)
     , mContentItem(new QQuickItem())
     , ext(new LockWindowExtension(this)) {
+	QQmlEngine::setObjectOwnership(this->mContentItem, QQmlEngine::CppOwnership);
 	this->mContentItem->setParent(this);
 
 	// clang-format off