refatcor: remove old tostafiy npm package

frontend/package.json

@@ -30,7 +30,6 @@
     "react": "^17.0.0 || ^18.0.0 || ^19.0.0",
     "react-dom": "^17.0.0 || ^18.0.0 || ^19.0.0",
     "react-i18next": "^17.0.8",
-    "react-toastify": "^11.1.0",
     "tailwindcss": "^4.3.0",
     "validator": "^13.15.35",
     "zod": "^4.4.3"

frontend/src/App.tsx

@@ -1,9 +1,9 @@
 import { createRouter, RouterProvider } from "@tanstack/react-router";
 import "./App.css";
-import { ToastContainer } from "react-toastify";
 import { routeTree } from "./routeTree.gen";
+import { NotFound } from "./components/NotFound.tsx";
 
-const router = createRouter({ routeTree });
+const router = createRouter({ routeTree, defaultNotFoundComponent: NotFound });
 
 declare module "@tanstack/react-router" {
   interface Register {
@@ -12,23 +12,7 @@ declare module "@tanstack/react-router" {
 }
 
 function App() {
-  return (
+  return <RouterProvider router={router} />;
-    <>
-      <ToastContainer
-        position="top-right"
-        autoClose={5000}
-        hideProgressBar={false}
-        newestOnTop={false}
-        closeOnClick={false}
-        rtl={false}
-        pauseOnFocusLoss
-        draggable
-        pauseOnHover
-        theme="colored"
-      />
-      <RouterProvider router={router} />
-    </>
-  );
 }
 
 export default App;

package-lock.json

@@ -59,7 +59,6 @@
         "react": "^17.0.0 || ^18.0.0 || ^19.0.0",
         "react-dom": "^17.0.0 || ^18.0.0 || ^19.0.0",
         "react-i18next": "^17.0.8",
-        "react-toastify": "^11.1.0",
         "tailwindcss": "^4.3.0",
         "validator": "^13.15.35",
         "zod": "^4.4.3"