fix: use setLayerPortName() instead of direct member access

Source/Helper/main.cpp

@@ -35,11 +35,10 @@ public:
 
         DBG("HelperApplication: Starting for parent PID " + juce::String(parentPid));
 
-        // Set the layer port name based on parent PID
         auto portName = juce::String(IPC::getLayerPortName(parentPid));
 
         pluginHost = std::make_unique<HelperPluginHost>();
-        pluginHost->layerPortName = portName;
+        pluginHost->setLayerPortName(portName);
 
         ipcServer = std::make_unique<HelperIPC>(parentPid, *pluginHost);