♻️ 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/common/ui/CompactModeToggle.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 { Button } from '@douyinfe/semi-ui';
+import PropTypes from 'prop-types';
+import { useIsMobile } from '../../../hooks/common/useIsMobile';
+
+/**
+ * 紧凑模式切换按钮组件
+ * 用于在自适应列表和紧凑列表之间切换
+ * 在移动端时自动隐藏，因为移动端使用"显示操作项"按钮来控制内容显示
+ */
+const CompactModeToggle = ({
+  compactMode,
+  setCompactMode,
+  t,
+  size = 'small',
+  type = 'tertiary',
+  className = '',
+  ...props
+}) => {
+  const isMobile = useIsMobile();
+
+  // 在移动端隐藏紧凑列表切换按钮
+  if (isMobile) {
+    return null;
+  }
+
+  return (
+    <Button
+      type={type}
+      size={size}
+      className={`w-full md:w-auto ${className}`}
+      onClick={() => setCompactMode(!compactMode)}
+      {...props}
+    >
+      {compactMode ? t('自适应列表') : t('紧凑列表')}
+    </Button>
+  );
+};
+
+CompactModeToggle.propTypes = {
+  compactMode: PropTypes.bool.isRequired,
+  setCompactMode: PropTypes.func.isRequired,
+  t: PropTypes.func.isRequired,
+  size: PropTypes.string,
+  type: PropTypes.string,
+  className: PropTypes.string,
+};
+
+export default CompactModeToggle;