♻️ refactor(web): migrate React modules from .js to .jsx and align entrypoint

- Rename React components/pages/utilities that contain JSX to `.jsx` across `web/src`
- Update import paths and re-exports to match new `.jsx` extensions
- Fix Vite entry by switching `web/index.html` from `/src/index.js` to `/src/index.jsx`
- Verified remaining `.js` files are plain JS (hooks/helpers/constants) and do not require JSX
- No runtime behavior changes; extension and reference alignment only

Context: Resolves the Vite pre-transform error caused by the stale `/src/index.js` entry after migrating to `.jsx`.

web/src/helpers/auth.jsx

@@ -0,0 +1,68 @@
+/*
+Copyright (C) 2025 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
+import React from 'react';
+import { Navigate } from 'react-router-dom';
+import { history } from './history';
+
+export function authHeader() {
+  // return authorization header with jwt token
+  let user = JSON.parse(localStorage.getItem('user'));
+
+  if (user && user.token) {
+    return { Authorization: 'Bearer ' + user.token };
+  } else {
+    return {};
+  }
+}
+
+export const AuthRedirect = ({ children }) => {
+  const user = localStorage.getItem('user');
+
+  if (user) {
+    return <Navigate to="/console" replace />;
+  }
+
+  return children;
+};
+
+function PrivateRoute({ children }) {
+  if (!localStorage.getItem('user')) {
+    return <Navigate to='/login' state={{ from: history.location }} />;
+  }
+  return children;
+}
+
+export function AdminRoute({ children }) {
+  const raw = localStorage.getItem('user');
+  if (!raw) {
+    return <Navigate to='/login' state={{ from: history.location }} />;
+  }
+  try {
+    const user = JSON.parse(raw);
+    if (user && typeof user.role === 'number' && user.role >= 10) {
+      return children;
+    }
+  } catch (e) {
+    // ignore
+  }
+  return <Navigate to='/forbidden' replace />;
+}
+
+export { PrivateRoute };