Add MQTT URL to environment variables and refactor simulation components

app/src/pages/Project.tsx

@@ -64,7 +64,6 @@ const Project: React.FC = () => {
       {activeModule === "market" && <MarketPlace />}
       <RealTimeVisulization />
       {activeModule !== "market" && <Tools />}
-      {/* <SimulationUI /> */}
       {isPlaying && activeModule === "simulation" && <SimulationPlayer />}
     </div>
   );