refactor: integrate CategoryService into SharedCarousel for improved category data management and enhance component structure

src/index.js

@@ -4,6 +4,7 @@ import "./index.css";
 import App from "./App.js";
 import { BrowserRouter } from "react-router-dom";
 import "./services/SocketManager.js";
+import "./services/CategoryService.js";
 
 // Create a wrapper component with our class-based GoogleAuthProvider
 // This avoids the "Invalid hook call" error from GoogleOAuthProvider