♻️ 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/render.jsx

@@ -20,7 +20,7 @@ For commercial licensing, please contact support@quantumnous.com
 import i18next from 'i18next';
 import { Modal, Tag, Typography, Avatar } from '@douyinfe/semi-ui';
 import { copy, showSuccess } from './utils';
-import { MOBILE_BREAKPOINT } from '../hooks/common/useIsMobile.js';
+import { MOBILE_BREAKPOINT } from '../hooks/common/useIsMobile';
 import { visit } from 'unist-util-visit';
 import * as LobeIcons from '@lobehub/icons';
 import {

web/src/helpers/utils.jsx

@@ -23,7 +23,7 @@ import React from 'react';
 import { toast } from 'react-toastify';
 import { THINK_TAG_REGEX, MESSAGE_ROLES } from '../constants/playground.constants';
 import { TABLE_COMPACT_MODES_KEY } from '../constants';
-import { MOBILE_BREAKPOINT } from '../hooks/common/useIsMobile.js';
+import { MOBILE_BREAKPOINT } from '../hooks/common/useIsMobile';
 
 const HTMLToastContent = ({ htmlContent }) => {
   return <div dangerouslySetInnerHTML={{ __html: htmlContent }} />;