Proof-of-concept QML test

WIP, do not review yet

src/messagecontent/ImageComponent.qml

@@ -43,6 +43,8 @@ Item {
      */
     property var contentMaxHeight: undefined
 
+    readonly property alias _private: _private
+
     implicitWidth: mediaSizeHelper.currentSize.width
     implicitHeight: mediaSizeHelper.currentSize.height
 

src/messagecontent/mediasizehelper.cpp

@@ -150,6 +150,10 @@ QSize MediaSizeHelper::currentSize() const
         if (height > heightLimit()) {
             return QSize(qRound(heightLimit() * aspectRatio()), qRound(heightLimit()));
         }
+        // TODO: NO
+        if (qIsNaN(width) || qIsNaN(height)) {
+            return {};
+        }
         return QSize(qRound(width), qRound(height));
     } else {
         qreal height = std::min(heightLimit(), resolvedMediaHeight());