♻️ 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/ImageUrlInput.jsx

@@ -0,0 +1,132 @@
+/*
+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 {
+  Input,
+  Typography,
+  Button,
+  Switch,
+} from '@douyinfe/semi-ui';
+import { IconFile } from '@douyinfe/semi-icons';
+import {
+  FileText,
+  Plus,
+  X,
+  Image,
+} from 'lucide-react';
+
+const ImageUrlInput = ({ imageUrls, imageEnabled, onImageUrlsChange, onImageEnabledChange, disabled = false }) => {
+  const handleAddImageUrl = () => {
+    const newUrls = [...imageUrls, ''];
+    onImageUrlsChange(newUrls);
+  };
+
+  const handleUpdateImageUrl = (index, value) => {
+    const newUrls = [...imageUrls];
+    newUrls[index] = value;
+    onImageUrlsChange(newUrls);
+  };
+
+  const handleRemoveImageUrl = (index) => {
+    const newUrls = imageUrls.filter((_, i) => i !== index);
+    onImageUrlsChange(newUrls);
+  };
+
+  return (
+    <div className={disabled ? 'opacity-50' : ''}>
+      <div className="flex items-center justify-between mb-2">
+        <div className="flex items-center gap-2">
+          <Image size={16} className={imageEnabled && !disabled ? "text-blue-500" : "text-gray-400"} />
+          <Typography.Text strong className="text-sm">
+            图片地址
+          </Typography.Text>
+          {disabled && (
+            <Typography.Text className="text-xs text-orange-600">
+              (已在自定义模式中忽略)
+            </Typography.Text>
+          )}
+        </div>
+        <div className="flex items-center gap-2">
+          <Switch
+            checked={imageEnabled}
+            onChange={onImageEnabledChange}
+            checkedText="启用"
+            uncheckedText="停用"
+            size="small"
+            className="flex-shrink-0"
+            disabled={disabled}
+          />
+          <Button
+            icon={<Plus size={14} />}
+            size="small"
+            theme="solid"
+            type="primary"
+            onClick={handleAddImageUrl}
+            className="!rounded-full !w-4 !h-4 !p-0 !min-w-0"
+            disabled={!imageEnabled || disabled}
+          />
+        </div>
+      </div>
+
+      {!imageEnabled ? (
+        <Typography.Text className="text-xs text-gray-500 mb-2 block">
+          {disabled ? '图片功能在自定义请求体模式下不可用' : '启用后可添加图片URL进行多模态对话'}
+        </Typography.Text>
+      ) : imageUrls.length === 0 ? (
+        <Typography.Text className="text-xs text-gray-500 mb-2 block">
+          {disabled ? '图片功能在自定义请求体模式下不可用' : '点击 + 按钮添加图片URL进行多模态对话'}
+        </Typography.Text>
+      ) : (
+        <Typography.Text className="text-xs text-gray-500 mb-2 block">
+          已添加 {imageUrls.length} 张图片{disabled ? ' (自定义模式下不可用)' : ''}
+        </Typography.Text>
+      )}
+
+      <div className={`space-y-2 max-h-32 overflow-y-auto image-list-scroll ${!imageEnabled || disabled ? 'opacity-50' : ''}`}>
+        {imageUrls.map((url, index) => (
+          <div key={index} className="flex items-center gap-2">
+            <div className="flex-1">
+              <Input
+                placeholder={`https://example.com/image${index + 1}.jpg`}
+                value={url}
+                onChange={(value) => handleUpdateImageUrl(index, value)}
+                className="!rounded-lg"
+                size="small"
+                prefix={<IconFile size='small' />}
+                disabled={!imageEnabled || disabled}
+              />
+            </div>
+            <Button
+              icon={<X size={12} />}
+              size="small"
+              theme="borderless"
+              type="danger"
+              onClick={() => handleRemoveImageUrl(index)}
+              className="!rounded-full !w-6 !h-6 !p-0 !min-w-0 !text-red-500 hover:!bg-red-50 flex-shrink-0"
+              disabled={!imageEnabled || disabled}
+            />
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+};
+
+export default ImageUrlInput;