feat：流式输出时展示饼图

.gitignore

@@ -87,3 +87,6 @@ _fixtures
 
 src/typegen.d.ts
 .eslint-config-inspector
+
+# pnpm local store (should not be committed)
+.pnpm-store/

package.json

@@ -48,6 +48,7 @@
     "date-fns": "^3.6.0",
     "docx-preview": "^0.3.6",
     "github-markdown-css": "^5.8.0",
+    "mermaid": "^11.13.0",
     "pdfjs-dist": "^5.4.149",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",

src/components/MarkdownDetail/index.tsx

-import { type ReactNode, memo } from 'react'
+import { type ReactNode, isValidElement, memo, useEffect, useId, useMemo, useState } from 'react'
 import ReactMarkdown from 'react-markdown'
 import rehypeRaw from 'rehype-raw'
-import rehypeSanitize from 'rehype-sanitize'
+import rehypeSanitize, { defaultSchema } from 'rehype-sanitize'
 import remarkGfm from 'remark-gfm'
 import { PhotoProvider, PhotoView } from 'react-photo-view'
 import { Image } from '@heroui/react'
@@ -10,13 +10,157 @@ interface MarkdownDetailProps {
   children: ReactNode
 }
 
+const sanitizeSchema = {
+  ...defaultSchema,
+  attributes: {
+    ...(defaultSchema as any).attributes,
+    a: [...(((defaultSchema as any).attributes?.a ?? []) as any[]), 'target', 'rel'],
+  },
+}
+
+function toText(node: any): string {
+  if (node == null)
+    return ''
+  if (typeof node === 'string')
+    return node
+  if (Array.isArray(node))
+    return node.map(toText).join('')
+  return ''
+}
+
+function normalizeMermaid(code: string): string {
+  const raw = String(code ?? '')
+    .replace(/\r\n/g, '\n')
+    .replace(/\u00A0/g, ' ')
+    .replace(/[\u2000-\u200B\u202F\u205F\u3000]/g, ' ')
+    .trim()
+
+  const lines = raw
+    .split('\n')
+    .map(l => l.trim().replace(/。$/g, ''))
+    .filter(Boolean)
+
+  return lines.join('\n').trim()
+}
+
+let mermaidInitPromise: Promise<any> | null = null
+async function getMermaid() {
+  if (!mermaidInitPromise) {
+    mermaidInitPromise = (async () => {
+      const mod: any = await import('mermaid')
+      const mermaid = mod?.default ?? mod
+      if (!mermaid)
+        throw new Error('Mermaid not available')
+      mermaid.initialize({ startOnLoad: false, suppressErrorRendering: true })
+      return mermaid
+    })()
+  }
+  return mermaidInitPromise
+}
+
+function MermaidBlock({ chart }: { chart: string }) {
+  const reactId = useId()
+  const renderId = useMemo(() => `mermaid-${reactId.replace(/:/g, '-')}`, [reactId])
+  const [svg, setSvg] = useState<string>('')
+  const [hidden, setHidden] = useState<boolean>(false)
+
+  useEffect(() => {
+    let cancelled = false
+    const code = normalizeMermaid(chart)
+    if (!code) {
+      setSvg('')
+      setHidden(true)
+      return () => {
+        cancelled = true
+      }
+    }
+
+    ;(async () => {
+      try {
+        const mermaid = await getMermaid()
+        mermaid.initialize({ startOnLoad: false, suppressErrorRendering: true })
+        try {
+          await mermaid.parse(code)
+        }
+        catch {
+          if (!cancelled) {
+            setSvg('')
+            setHidden(true)
+          }
+          return
+        }
+
+        const res = await mermaid.render(renderId, code)
+        if (!cancelled) {
+          const outSvg = String(res?.svg || '')
+          if (/Syntax error in text/i.test(outSvg)) {
+            setSvg('')
+            setHidden(true)
+          }
+          else {
+            setSvg(outSvg)
+            setHidden(false)
+          }
+        }
+      }
+      catch {
+        if (!cancelled) {
+          setSvg('')
+          setHidden(true)
+        }
+      }
+    })()
+
+    return () => {
+      cancelled = true
+    }
+  }, [chart, renderId])
+
+  if (hidden || !svg)
+    return null
+
+  return (
+    <div className="my-[8px] overflow-x-auto">
+      <div dangerouslySetInnerHTML={{ __html: svg }} />
+    </div>
+  )
+}
+
 export const MarkdownDetail: React.FC<MarkdownDetailProps> = memo(({ children }) => {
   return (
     <ReactMarkdown
-      rehypePlugins={[rehypeRaw, rehypeSanitize]}
+      rehypePlugins={[rehypeRaw, [rehypeSanitize, sanitizeSchema as any]]}
       remarkPlugins={[remarkGfm]}
       className="markdown-body flex flex-col text-[#27353C] text-[15px]"
       components={{
+        a: ({ href, children, ...props }) => {
+          const link = String(href || '').trim()
+          const isHashLink = link.startsWith('#')
+          const isExternal = /^https?:\/\//i.test(link) || link.startsWith('//')
+          return (
+            <a
+              {...props}
+              href={href}
+              target={(link && isExternal && !isHashLink) ? '_blank' : undefined}
+              rel={(link && isExternal && !isHashLink) ? 'noopener noreferrer' : undefined}
+            >
+              {children}
+            </a>
+          )
+        },
+        pre: ({ children, ...props }) => {
+          const arr = Array.isArray(children) ? children : [children]
+          const first = arr.find(Boolean)
+          if (isValidElement(first)) {
+            const className = String((first.props as any)?.className || '')
+            const lang = className.match(/language-(\S+)/)?.[1]?.toLowerCase()
+            if (lang?.startsWith('mermaid') || lang === 'pie') {
+              const chart = toText((first.props as any)?.children)
+              return <MermaidBlock chart={chart} />
+            }
+          }
+          return <pre {...props}>{children}</pre>
+        },
         img: ({ ...data }): JSX.Element => {
           return (
             <PhotoProvider maskOpacity={0.5} bannerVisible={false}>