♻️ 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/components/table/channels/modals/ModelTestModal.jsx

@@ -27,8 +27,8 @@ import {
   Typography
 } from '@douyinfe/semi-ui';
 import { IconSearch } from '@douyinfe/semi-icons';
-import { copy, showError, showInfo, showSuccess } from '../../../../helpers/index.js';
-import { MODEL_TABLE_PAGE_SIZE } from '../../../../constants/index.js';
+import { copy, showError, showInfo, showSuccess } from '../../../../helpers';
+import { MODEL_TABLE_PAGE_SIZE } from '../../../../constants';
 
 const ModelTestModal = ({
   showModelTestModal,