优化大pdf加载

frontend/Dockerfile

@@ -1,5 +1,5 @@
 # 构建阶段
-FROM swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/node:18-alpine AS builder
+FROM swr.cn-north-4.myhuaweicloud.com/ddn-k8s/docker.io/node:20-alpine AS builder
 
 # 设置工作目录
 WORKDIR /app

frontend/src/pages/Preview/PreviewPage.jsx

@@ -202,6 +202,66 @@ function PreviewPage() {
       setTocItems(headings)
     }
   }, [markdownContent])
+  // 解析相对路径
+  const resolveRelativePath = (currentPath, relativePath) => {
+    if (relativePath.startsWith('/')) {
+      return relativePath.substring(1)
+    }
+
+    const lastSlashIndex = currentPath.lastIndexOf('/')
+    const currentDir = lastSlashIndex !== -1 ? currentPath.substring(0, lastSlashIndex) : ''
+
+    const parts = relativePath.split('/')
+    const dirParts = currentDir ? currentDir.split('/') : []
+
+    for (const part of parts) {
+      if (part === '..') {
+        dirParts.pop()
+      } else if (part !== '.' && part !== '') {
+        dirParts.push(part)
+      }
+    }
+
+    return dirParts.join('/')
+  }
+
+  // 处理 markdown 内部链接点击
+  const handleMarkdownLink = (e, href) => {
+    if (!href || href.startsWith('http') || href.startsWith('//') || href.startsWith('#')) {
+      return
+    }
+
+    const isMd = href.endsWith('.md')
+    const isPdf = href.toLowerCase().endsWith('.pdf')
+
+    if (!isMd && !isPdf) return
+
+    e.preventDefault()
+
+    let decodedHref = href
+    try {
+      decodedHref = decodeURIComponent(href)
+    } catch (err) {
+      // ignore
+    }
+
+    const targetPath = resolveRelativePath(selectedFile, decodedHref)
+
+    const lastSlashIndex = targetPath.lastIndexOf('/')
+    const parentPath = lastSlashIndex !== -1 ? targetPath.substring(0, lastSlashIndex) : ''
+    if (parentPath && !openKeys.includes(parentPath)) {
+      const pathParts = parentPath.split('/')
+      const allParentPaths = []
+      let currentPath = ''
+      for (const part of pathParts) {
+        currentPath = currentPath ? `${currentPath}/${part}` : part
+        allParentPaths.push(currentPath)
+      }
+      setOpenKeys([...new Set([...openKeys, ...allParentPaths])])
+    }
+
+    handleMenuClick({ key: targetPath })
+  }
 
   // 处理菜单点击
   const handleMenuClick = ({ key }) => {
@@ -325,6 +385,17 @@ function PreviewPage() {
                   <ReactMarkdown
                     remarkPlugins={[remarkGfm]}
                     rehypePlugins={[rehypeRaw, rehypeSlug, rehypeHighlight]}
+                    components={{
+                      a: ({ node, href, children, ...props }) => (
+                        <a
+                          href={href}
+                          onClick={(e) => handleMarkdownLink(e, href)}
+                          {...props}
+                        >
+                          {children}
+                        </a>
+                      ),
+                    }}
                   >
                     {markdownContent}
                   </ReactMarkdown>