♻️ 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/playground/FloatingButtons.jsx

@@ -0,0 +1,90 @@
+/*
+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 {
+  Settings,
+  Eye,
+  EyeOff,
+} from 'lucide-react';
+
+const FloatingButtons = ({
+  styleState,
+  showSettings,
+  showDebugPanel,
+  onToggleSettings,
+  onToggleDebugPanel,
+}) => {
+  if (!styleState.isMobile) return null;
+
+  return (
+    <>
+      {/* 设置按钮 */}
+      {!showSettings && (
+        <Button
+          icon={<Settings size={18} />}
+          style={{
+            position: 'fixed',
+            right: 16,
+            bottom: 90,
+            zIndex: 1000,
+            width: 36,
+            height: 36,
+            borderRadius: '50%',
+            padding: 0,
+            boxShadow: '0 4px 12px rgba(0, 0, 0, 0.2)',
+            background: 'linear-gradient(to right, #8b5cf6, #6366f1)',
+          }}
+          onClick={onToggleSettings}
+          theme='solid'
+          type='primary'
+          className="lg:hidden"
+        />
+      )}
+
+      {/* 调试按钮 */}
+      {!showSettings && (
+        <Button
+          icon={showDebugPanel ? <EyeOff size={18} /> : <Eye size={18} />}
+          onClick={onToggleDebugPanel}
+          theme="solid"
+          type={showDebugPanel ? "danger" : "primary"}
+          style={{
+            position: 'fixed',
+            right: 16,
+            bottom: 140,
+            zIndex: 1000,
+            width: 36,
+            height: 36,
+            borderRadius: '50%',
+            padding: 0,
+            boxShadow: '0 4px 12px rgba(0, 0, 0, 0.2)',
+            background: showDebugPanel
+              ? 'linear-gradient(to right, #e11d48, #be123c)'
+              : 'linear-gradient(to right, #4f46e5, #6366f1)',
+          }}
+          className="lg:hidden"
+        />
+      )}
+    </>
+  );
+};
+
+export default FloatingButtons;