feat(代码块): 添加 HTML 代码预览功能

- 在代码块工具栏添加预览按钮
- 支持 HTML/HTM 类型代码的实时预览
- 集成 HtmlPreviewModal 模态框组件

src/components/markdown/CodeBlock.tsx

@@ -1,9 +1,10 @@
 'use client';
 
 import { useEffect, useRef, useState, useMemo } from 'react';
-import { Copy, Check } from 'lucide-react';
+import { Copy, Check, Eye } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import Prism from 'prismjs';
+import { HtmlPreviewModal } from '@/components/ui/HtmlPreviewModal';
 import 'prismjs/components/prism-javascript';
 import 'prismjs/components/prism-typescript';
 import 'prismjs/components/prism-jsx';
@@ -52,10 +53,15 @@ export function CodeBlock({
   className,
 }: CodeBlockProps) {
   const [copied, setCopied] = useState(false);
+  const [previewOpen, setPreviewOpen] = useState(false);
 
   // 规范化语言名称
   const normalizedLanguage = languageAliases[language.toLowerCase()] || language.toLowerCase();
 
+  // 判断是否支持 HTML 预览
+  const isHtmlPreviewable = ['html', 'htm', 'markup'].includes(normalizedLanguage) ||
+                            ['html', 'htm'].includes(language.toLowerCase());
+
   // 使用 useMemo 缓存高亮后的 HTML，避免频繁重新高亮
   const highlightedCode = useMemo(() => {
     const grammar = Prism.languages[normalizedLanguage];
@@ -78,27 +84,41 @@ export function CodeBlock({
   const lines = code.split('\n');
 
   return (
-    <div className={cn('relative group rounded-lg overflow-hidden my-4', className)}>
+    <div className={cn('relative group rounded overflow-hidden my-4', className)}>
       {/* 顶部工具栏 */}
       <div className="flex items-center justify-between px-4 py-2 bg-[#2d2d2d] text-gray-400 text-sm">
         <span className="font-mono">{language || 'code'}</span>
-        <button
-          onClick={handleCopy}
-          className="inline-flex items-center gap-1.5 px-2 py-1 rounded hover:bg-white/10 transition-colors"
-          title="Copy code"
-        >
-          {copied ? (
-            <>
-              <Check size={14} className="text-green-400" />
-              <span className="text-green-400">Copied!</span>
-            </>
-          ) : (
-            <>
-              <Copy size={14} />
-              <span>Copy</span>
-            </>
+        <div className="flex items-center gap-2">
+          {/* HTML 预览按钮 */}
+          {isHtmlPreviewable && (
+            <button
+              onClick={() => setPreviewOpen(true)}
+              className="inline-flex items-center gap-1.5 px-2 py-1 rounded hover:bg-white/10 transition-colors text-blue-400 hover:text-blue-300"
+              title="预览 HTML"
+            >
+              <Eye size={14} />
+              <span>预览</span>
+            </button>
           )}
-        </button>
+          {/* 复制按钮 */}
+          <button
+            onClick={handleCopy}
+            className="inline-flex items-center gap-1.5 px-2 py-1 rounded hover:bg-white/10 transition-colors"
+            title="Copy code"
+          >
+            {copied ? (
+              <>
+                <Check size={14} className="text-green-400" />
+                <span className="text-green-400">Copied!</span>
+              </>
+            ) : (
+              <>
+                <Copy size={14} />
+                <span>Copy</span>
+              </>
+            )}
+          </button>
+        </div>
       </div>
 
       {/* 代码区域 */}
@@ -130,6 +150,16 @@ export function CodeBlock({
           />
         </pre>
       </div>
+
+      {/* HTML 预览模态框 */}
+      {isHtmlPreviewable && (
+        <HtmlPreviewModal
+          htmlCode={code}
+          isOpen={previewOpen}
+          onClose={() => setPreviewOpen(false)}
+          language={language}
+        />
+      )}
     </div>
   );
 }