server

Ensures that the message parser returns a default "{}" response after handling an event, preventing unintended empty responses.
Also, this change avoids sending empty messages to the client unnecessarily.

server/message_parser.cpp

@@ -13,12 +13,8 @@ QString Simulators::message_parser(QString message)
     else if (j.contains("event"))
     {
         event_handler(j["event"]);
-        return "";
-    }
-    else
-    {
-        return "";
     }
+    return "{}";
 }
 
 json Simulators::command_parser(json command)