♻️ 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/MessageContent.jsx

@@ -0,0 +1,332 @@
+/*
+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, { useRef, useEffect } from 'react';
+import {
+  Typography,
+  TextArea,
+  Button,
+} from '@douyinfe/semi-ui';
+import MarkdownRenderer from '../common/markdown/MarkdownRenderer';
+import ThinkingContent from './ThinkingContent';
+import {
+  Loader2,
+  Check,
+  X,
+} from 'lucide-react';
+import { useTranslation } from 'react-i18next';
+
+const MessageContent = ({
+  message,
+  className,
+  styleState,
+  onToggleReasoningExpansion,
+  isEditing = false,
+  onEditSave,
+  onEditCancel,
+  editValue,
+  onEditValueChange
+}) => {
+  const { t } = useTranslation();
+  const previousContentLengthRef = useRef(0);
+  const lastContentRef = useRef('');
+
+  const isThinkingStatus = message.status === 'loading' || message.status === 'incomplete';
+
+  useEffect(() => {
+    if (!isThinkingStatus) {
+      previousContentLengthRef.current = 0;
+      lastContentRef.current = '';
+    }
+  }, [isThinkingStatus]);
+
+  if (message.status === 'error') {
+    let errorText;
+
+    if (Array.isArray(message.content)) {
+      const textContent = message.content.find(item => item.type === 'text');
+      errorText = textContent && textContent.text && typeof textContent.text === 'string'
+        ? textContent.text
+        : t('请求发生错误');
+    } else if (typeof message.content === 'string') {
+      errorText = message.content;
+    } else {
+      errorText = t('请求发生错误');
+    }
+
+    return (
+      <div className={`${className} flex items-center p-4 bg-red-50 rounded-xl`}>
+        <Typography.Text type="danger" className="text-sm">
+          {errorText}
+        </Typography.Text>
+      </div>
+    );
+  }
+
+  let currentExtractedThinkingContent = null;
+  let currentDisplayableFinalContent = "";
+  let thinkingSource = null;
+
+  const getTextContent = (content) => {
+    if (Array.isArray(content)) {
+      const textItem = content.find(item => item.type === 'text');
+      return textItem && textItem.text && typeof textItem.text === 'string' ? textItem.text : '';
+    } else if (typeof content === 'string') {
+      return content;
+    }
+    return '';
+  };
+
+  currentDisplayableFinalContent = getTextContent(message.content);
+
+  if (message.role === 'assistant') {
+    let baseContentForDisplay = getTextContent(message.content);
+    let combinedThinkingContent = "";
+
+    if (message.reasoningContent) {
+      combinedThinkingContent = message.reasoningContent;
+      thinkingSource = 'reasoningContent';
+    }
+
+    if (baseContentForDisplay.includes('<think>')) {
+      const thinkTagRegex = /<think>([\s\S]*?)<\/think>/g;
+      let match;
+      let thoughtsFromPairedTags = [];
+      let replyParts = [];
+      let lastIndex = 0;
+
+      while ((match = thinkTagRegex.exec(baseContentForDisplay)) !== null) {
+        replyParts.push(baseContentForDisplay.substring(lastIndex, match.index));
+        thoughtsFromPairedTags.push(match[1]);
+        lastIndex = match.index + match[0].length;
+      }
+      replyParts.push(baseContentForDisplay.substring(lastIndex));
+
+      if (thoughtsFromPairedTags.length > 0) {
+        const pairedThoughtsStr = thoughtsFromPairedTags.join('\n\n---\n\n');
+        if (combinedThinkingContent) {
+          combinedThinkingContent += '\n\n---\n\n' + pairedThoughtsStr;
+        } else {
+          combinedThinkingContent = pairedThoughtsStr;
+        }
+        thinkingSource = thinkingSource ? thinkingSource + ' & <think> tags' : '<think> tags';
+      }
+
+      baseContentForDisplay = replyParts.join('');
+    }
+
+    if (isThinkingStatus) {
+      const lastOpenThinkIndex = baseContentForDisplay.lastIndexOf('<think>');
+      if (lastOpenThinkIndex !== -1) {
+        const fragmentAfterLastOpen = baseContentForDisplay.substring(lastOpenThinkIndex);
+        if (!fragmentAfterLastOpen.includes('</think>')) {
+          const unclosedThought = fragmentAfterLastOpen.substring('<think>'.length).trim();
+          if (unclosedThought) {
+            if (combinedThinkingContent) {
+              combinedThinkingContent += '\n\n---\n\n' + unclosedThought;
+            } else {
+              combinedThinkingContent = unclosedThought;
+            }
+            thinkingSource = thinkingSource ? thinkingSource + ' + streaming <think>' : 'streaming <think>';
+          }
+          baseContentForDisplay = baseContentForDisplay.substring(0, lastOpenThinkIndex);
+        }
+      }
+    }
+
+    currentExtractedThinkingContent = combinedThinkingContent || null;
+    currentDisplayableFinalContent = baseContentForDisplay.replace(/<\/?think>/g, '').trim();
+  }
+
+  const finalExtractedThinkingContent = currentExtractedThinkingContent;
+  const finalDisplayableFinalContent = currentDisplayableFinalContent;
+
+  if (message.role === 'assistant' &&
+    isThinkingStatus &&
+    !finalExtractedThinkingContent &&
+    (!finalDisplayableFinalContent || finalDisplayableFinalContent.trim() === '')) {
+    return (
+      <div className={`${className} flex items-center gap-2 sm:gap-4 bg-gradient-to-r from-purple-50 to-indigo-50`}>
+        <div className="w-5 h-5 rounded-full bg-gradient-to-br from-purple-500 to-indigo-600 flex items-center justify-center shadow-lg">
+          <Loader2 className="animate-spin text-white" size={styleState.isMobile ? 16 : 20} />
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className={className}>
+      {message.role === 'system' && (
+        <div className="mb-2 sm:mb-4">
+          <div className="flex items-center gap-2 p-2 sm:p-3 bg-gradient-to-r from-amber-50 to-orange-50 rounded-lg" style={{ border: '1px solid var(--semi-color-border)' }}>
+            <div className="w-4 h-4 sm:w-5 sm:h-5 rounded-full bg-gradient-to-br from-amber-500 to-orange-600 flex items-center justify-center shadow-sm">
+              <Typography.Text className="text-white text-xs font-bold">S</Typography.Text>
+            </div>
+            <Typography.Text className="text-amber-700 text-xs sm:text-sm font-medium">
+              {t('系统消息')}
+            </Typography.Text>
+          </div>
+        </div>
+      )}
+
+      {message.role === 'assistant' && (
+        <ThinkingContent
+          message={message}
+          finalExtractedThinkingContent={finalExtractedThinkingContent}
+          thinkingSource={thinkingSource}
+          styleState={styleState}
+          onToggleReasoningExpansion={onToggleReasoningExpansion}
+        />
+      )}
+
+      {isEditing ? (
+        <div className="space-y-3">
+          <TextArea
+            value={editValue}
+            onChange={(value) => onEditValueChange(value)}
+            placeholder={t('请输入消息内容...')}
+            autosize={{ minRows: 3, maxRows: 12 }}
+            style={{
+              resize: 'vertical',
+              fontSize: styleState.isMobile ? '14px' : '15px',
+              lineHeight: '1.6',
+            }}
+            className="!border-blue-200 focus:!border-blue-400 !bg-blue-50/50"
+          />
+          <div className="flex items-center gap-2 w-full">
+            <Button
+              size="small"
+              type="danger"
+              theme="light"
+              icon={<X size={14} />}
+              onClick={onEditCancel}
+              className="flex-1"
+            >
+              {t('取消')}
+            </Button>
+            <Button
+              size="small"
+              type="warning"
+              theme="solid"
+              icon={<Check size={14} />}
+              onClick={onEditSave}
+              disabled={!editValue || editValue.trim() === ''}
+              className="flex-1"
+            >
+              {t('保存')}
+            </Button>
+          </div>
+        </div>
+      ) : (
+        (() => {
+          if (Array.isArray(message.content)) {
+            const textContent = message.content.find(item => item.type === 'text');
+            const imageContents = message.content.filter(item => item.type === 'image_url');
+
+            return (
+              <div>
+                {imageContents.length > 0 && (
+                  <div className="mb-3 space-y-2">
+                    {imageContents.map((imgItem, index) => (
+                      <div key={index} className="max-w-sm">
+                        <img
+                          src={imgItem.image_url.url}
+                          alt={`用户上传的图片 ${index + 1}`}
+                          className="rounded-lg max-w-full h-auto shadow-sm border"
+                          style={{ maxHeight: '300px' }}
+                          onError={(e) => {
+                            e.target.style.display = 'none';
+                            e.target.nextSibling.style.display = 'block';
+                          }}
+                        />
+                        <div
+                          className="text-red-500 text-sm p-2 bg-red-50 rounded-lg border border-red-200"
+                          style={{ display: 'none' }}
+                        >
+                          图片加载失败: {imgItem.image_url.url}
+                        </div>
+                      </div>
+                    ))}
+                  </div>
+                )}
+
+                {textContent && textContent.text && typeof textContent.text === 'string' && textContent.text.trim() !== '' && (
+                  <div className={`prose prose-xs sm:prose-sm prose-gray max-w-none overflow-x-auto text-xs sm:text-sm ${message.role === 'user' ? 'user-message' : ''}`}>
+                    <MarkdownRenderer
+                      content={textContent.text}
+                      className={message.role === 'user' ? 'user-message' : ''}
+                      animated={false}
+                      previousContentLength={0}
+                    />
+                  </div>
+                )}
+              </div>
+            );
+          }
+
+          if (typeof message.content === 'string') {
+            if (message.role === 'assistant') {
+              if (finalDisplayableFinalContent && finalDisplayableFinalContent.trim() !== '') {
+                // 获取上一次的内容长度
+                let prevLength = 0;
+                if (isThinkingStatus && lastContentRef.current) {
+                  // 只有当前内容包含上一次内容时，才使用上一次的长度
+                  if (finalDisplayableFinalContent.startsWith(lastContentRef.current)) {
+                    prevLength = lastContentRef.current.length;
+                  }
+                }
+
+                // 更新最后内容的引用
+                if (isThinkingStatus) {
+                  lastContentRef.current = finalDisplayableFinalContent;
+                }
+
+                return (
+                  <div className="prose prose-xs sm:prose-sm prose-gray max-w-none overflow-x-auto text-xs sm:text-sm">
+                    <MarkdownRenderer
+                      content={finalDisplayableFinalContent}
+                      className=""
+                      animated={isThinkingStatus}
+                      previousContentLength={prevLength}
+                    />
+                  </div>
+                );
+              }
+            } else {
+              return (
+                <div className={`prose prose-xs sm:prose-sm prose-gray max-w-none overflow-x-auto text-xs sm:text-sm ${message.role === 'user' ? 'user-message' : ''}`}>
+                  <MarkdownRenderer
+                    content={message.content}
+                    className={message.role === 'user' ? 'user-message' : ''}
+                    animated={false}
+                    previousContentLength={0}
+                  />
+                </div>
+              );
+            }
+          }
+
+          return null;
+        })()
+      )}
+    </div>
+  );
+};
+
+export default MessageContent;