From ec16657cbb7cab862122f5f9835d633d34af4654 Mon Sep 17 00:00:00 2001
From: suyao <sy20010504@gmail.com>
Date: Fri, 24 Oct 2025 14:15:48 +0800
Subject: [PATCH] Upgrade TipTap to v3.7.2 and add text highlight feature

- Update all TipTap packages from v3.2.0 to v3.7.2 including core extensions and dependencies
- Add new highlight extension with Markdown support using ==text== syntax
- Replace custom markdown converter with TipTap's built-in Markdown extension
- Simplify link handling by using standard TipTap link extension instead of enhancedLink
- Add view menu to app menu service for better Electron app navigation
---
 package.json                                  |  31 +-
 packages/extension-table-plus/package.json    |   4 +-
 src/main/services/AppMenuService.ts           |   3 +
 .../src/components/RichEditor/command.ts      |  19 +-
 .../RichEditor/extensions/enhanced-link.ts    |  29 +-
 .../RichEditor/extensions/hightlight.ts       |  73 ++
 .../src/components/RichEditor/index.tsx       |  28 +-
 .../src/components/RichEditor/toolbar.tsx     |   5 +-
 .../src/components/RichEditor/types.ts        |   5 +-
 .../components/RichEditor/useRichEditor.ts    | 145 +---
 src/renderer/src/i18n/locales/en-us.json      |   1 +
 src/renderer/src/i18n/locales/zh-cn.json      |   1 +
 .../utils/__tests__/markdownConverter.test.ts | 554 --------------
 src/renderer/src/utils/markdownConverter.ts   | 693 +-----------------
 yarn.lock                                     | 541 +++++++-------
 15 files changed, 451 insertions(+), 1681 deletions(-)
 create mode 100644 src/renderer/src/components/RichEditor/extensions/hightlight.ts
 delete mode 100644 src/renderer/src/utils/__tests__/markdownConverter.test.ts

diff --git a/package.json b/package.json
index 9c4398cdc2..fdff8fb99c 100644
--- a/package.json
+++ b/package.json
@@ -168,21 +168,22 @@
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.3.0",
     "@testing-library/user-event": "^14.6.1",
-    "@tiptap/extension-collaboration": "^3.2.0",
-    "@tiptap/extension-drag-handle": "patch:@tiptap/extension-drag-handle@npm%3A3.2.0#~/.yarn/patches/@tiptap-extension-drag-handle-npm-3.2.0-5a9ebff7c9.patch",
-    "@tiptap/extension-drag-handle-react": "^3.2.0",
-    "@tiptap/extension-image": "^3.2.0",
-    "@tiptap/extension-list": "^3.2.0",
-    "@tiptap/extension-mathematics": "^3.2.0",
-    "@tiptap/extension-mention": "^3.2.0",
-    "@tiptap/extension-node-range": "^3.2.0",
-    "@tiptap/extension-table-of-contents": "^3.2.0",
-    "@tiptap/extension-typography": "^3.2.0",
-    "@tiptap/extension-underline": "^3.2.0",
-    "@tiptap/pm": "^3.2.0",
-    "@tiptap/react": "^3.2.0",
-    "@tiptap/starter-kit": "^3.2.0",
-    "@tiptap/suggestion": "^3.2.0",
+    "@tiptap/extension-collaboration": "^3.7.2",
+    "@tiptap/extension-drag-handle": "^3.7.2",
+    "@tiptap/extension-drag-handle-react": "^3.7.2",
+    "@tiptap/extension-image": "^3.7.2",
+    "@tiptap/extension-list": "^3.7.2",
+    "@tiptap/extension-mathematics": "^3.7.2",
+    "@tiptap/extension-mention": "^3.7.2",
+    "@tiptap/extension-node-range": "^3.7.2",
+    "@tiptap/extension-table-of-contents": "^3.7.2",
+    "@tiptap/extension-typography": "^3.7.2",
+    "@tiptap/extension-underline": "^3.7.2",
+    "@tiptap/markdown": "^3.7.2",
+    "@tiptap/pm": "^3.7.2",
+    "@tiptap/react": "^3.7.2",
+    "@tiptap/starter-kit": "^3.7.2",
+    "@tiptap/suggestion": "^3.7.2",
     "@tiptap/y-tiptap": "^3.0.0",
     "@truto/turndown-plugin-gfm": "^1.0.2",
     "@tryfabric/martian": "^1.2.4",
diff --git a/packages/extension-table-plus/package.json b/packages/extension-table-plus/package.json
index 9601c1f8b8..6ffc9e9af2 100755
--- a/packages/extension-table-plus/package.json
+++ b/packages/extension-table-plus/package.json
@@ -68,8 +68,8 @@
   ],
   "devDependencies": {
     "@biomejs/biome": "2.2.4",
-    "@tiptap/core": "^3.2.0",
-    "@tiptap/pm": "^3.2.0",
+    "@tiptap/core": "^3.7.2",
+    "@tiptap/pm": "^3.7.2",
     "eslint": "^9.22.0",
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-simple-import-sort": "^12.1.1",
diff --git a/src/main/services/AppMenuService.ts b/src/main/services/AppMenuService.ts
index 0e6cdf27ea..b9ea848a34 100644
--- a/src/main/services/AppMenuService.ts
+++ b/src/main/services/AppMenuService.ts
@@ -38,6 +38,9 @@ export class AppMenuService {
       {
         role: 'editMenu'
       },
+      {
+        role: 'viewMenu'
+      },
       {
         role: 'windowMenu'
       }
diff --git a/src/renderer/src/components/RichEditor/command.ts b/src/renderer/src/components/RichEditor/command.ts
index 1371b3ebb6..6e5e845119 100644
--- a/src/renderer/src/components/RichEditor/command.ts
+++ b/src/renderer/src/components/RichEditor/command.ts
@@ -14,6 +14,7 @@ import {
   Heading1,
   Heading2,
   Heading3,
+  Highlighter,
   Image,
   Italic,
   Link,
@@ -193,6 +194,20 @@ const DEFAULT_COMMANDS: Command[] = [
     toolbarGroup: 'formatting',
     formattingCommand: 'strike'
   },
+  {
+    id: 'highlight',
+    title: 'Highlight',
+    description: 'Highlight text',
+    category: CommandCategory.TEXT,
+    icon: Highlighter,
+    keywords: ['highlight', 'marker', 'background'],
+    handler: (editor: Editor) => {
+      editor.chain().focus().toggleHighlight().run()
+    },
+    showInToolbar: true,
+    toolbarGroup: 'formatting',
+    formattingCommand: 'highlight'
+  },
   {
     id: 'inlineCode',
     title: 'Inline Code',
@@ -348,11 +363,11 @@ const DEFAULT_COMMANDS: Command[] = [
     id: 'link',
     title: 'Link',
     description: 'Add a link',
-    category: CommandCategory.SPECIAL,
+    category: CommandCategory.TEXT,
     icon: Link,
     keywords: ['link', 'url', 'href'],
     handler: (editor: Editor) => {
-      editor.chain().focus().setEnhancedLink({ href: '' }).run()
+      editor.chain().focus().setLink({ href: '' }).run()
     },
     showInToolbar: true,
     toolbarGroup: 'media',
diff --git a/src/renderer/src/components/RichEditor/extensions/enhanced-link.ts b/src/renderer/src/components/RichEditor/extensions/enhanced-link.ts
index b3832112f0..7273d26557 100644
--- a/src/renderer/src/components/RichEditor/extensions/enhanced-link.ts
+++ b/src/renderer/src/components/RichEditor/extensions/enhanced-link.ts
@@ -105,12 +105,7 @@ const createLinkHoverPlugin = (options: LinkHoverPluginOptions) => {
                   const $pos = view.state.doc.resolve(pos)
 
                   // Find the link mark at this position
-                  const linkMark = $pos
-                    .marks()
-                    .find(
-                      (mark) =>
-                        (mark.type.name === 'enhancedLink' || mark.type.name === 'link') && mark.attrs.href === href
-                    )
+                  const linkMark = $pos.marks().find((mark) => mark.type.name === 'link' && mark.attrs.href === href)
 
                   if (linkMark) {
                     // Use ProseMirror's mark range finding
@@ -153,12 +148,7 @@ const createLinkHoverPlugin = (options: LinkHoverPluginOptions) => {
                   const startPos = view.posAtDOM(linkElement, 0)
                   if (startPos >= 0) {
                     const $pos = view.state.doc.resolve(startPos)
-                    const linkMark = $pos
-                      .marks()
-                      .find(
-                        (mark) =>
-                          (mark.type.name === 'enhancedLink' || mark.type.name === 'link') && mark.attrs.href === href
-                      )
+                    const linkMark = $pos.marks().find((mark) => mark.type.name === 'link' && mark.attrs.href === href)
 
                     if (linkMark) {
                       const range = getMarkRange($pos, linkMark.type, linkMark.attrs)
@@ -235,7 +225,7 @@ const createLinkAutoUpdatePlugin = () => {
       newState.doc.descendants((node, pos) => {
         if (node.isText && node.marks) {
           node.marks.forEach((mark) => {
-            if (mark.type.name === 'enhancedLink') {
+            if (mark.type.name === 'link') {
               const text = node.text || ''
               const currentHref = mark.attrs.href || ''
 
@@ -280,16 +270,7 @@ const createLinkAutoUpdatePlugin = () => {
   })
 }
 
-declare module '@tiptap/core' {
-  interface Commands<ReturnType> {
-    enhancedLink: {
-      setEnhancedLink: (attributes: { href: string; title?: string }) => ReturnType
-      toggleEnhancedLink: (attributes: { href: string; title?: string }) => ReturnType
-      unsetEnhancedLink: () => ReturnType
-      updateLinkText: (text: string) => ReturnType
-    }
-  }
-}
+// Commands are inherited from the parent Link extension, no need to redeclare
 
 export interface EnhancedLinkOptions {
   onLinkHover?: (
@@ -304,7 +285,7 @@ export interface EnhancedLinkOptions {
 }
 
 export const EnhancedLink = Link.extend<EnhancedLinkOptions>({
-  name: 'enhancedLink',
+  name: 'link', // Use 'link' instead of 'enhancedLink' to be compatible with Markdown extension
 
   addOptions() {
     return {
diff --git a/src/renderer/src/components/RichEditor/extensions/hightlight.ts b/src/renderer/src/components/RichEditor/extensions/hightlight.ts
new file mode 100644
index 0000000000..6ad09df5f5
--- /dev/null
+++ b/src/renderer/src/components/RichEditor/extensions/hightlight.ts
@@ -0,0 +1,73 @@
+import { Mark } from '@tiptap/core'
+
+declare module '@tiptap/core' {
+  interface Commands<ReturnType> {
+    highlight: {
+      toggleHighlight: () => ReturnType
+    }
+  }
+}
+
+export const Highlight = Mark.create({
+  name: 'highlight',
+
+  addOptions() {
+    return {
+      HTMLAttributes: {}
+    }
+  },
+
+  parseHTML() {
+    return [{ tag: 'mark' }]
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return ['mark', HTMLAttributes, 0]
+  },
+
+  // define a custom Markdown tokenizer to recognize ==text==
+  markdownTokenizer: {
+    name: 'highlight',
+    level: 'inline', // inline element
+    // fast hint for the lexer to find candidate positions
+    start: (src) => src.indexOf('=='),
+    tokenize: (src, tokens, lexer) => {
+      // Match ==text== at the start of the remaining source
+      const match = /^==([^=]+)==/.exec(src)
+      if (!match) return undefined
+
+      return {
+        type: 'highlight', // token type (must match name)
+        raw: match[0], // full matched string: ==text==
+        text: match[1], // inner content: text
+        // Let the Markdown lexer process nested inline formatting
+        tokens: lexer.inlineTokens(match[1])
+      }
+    }
+  },
+
+  // Parse Markdown token to Tiptap JSON
+  parseMarkdown: (token, helpers) => {
+    // Parse nested inline tokens into Tiptap inline content
+    const content = helpers.parseInline(token.tokens || [])
+    // Apply the 'highlight' mark to the parsed content
+    return helpers.applyMark('highlight', content)
+  },
+
+  // Render Tiptap node back to Markdown
+  renderMarkdown: (node, helpers) => {
+    const content = helpers.renderChildren(node.content || [])
+    // Wrap serialized children in == delimiters
+    return `==${content}==`
+  },
+
+  addCommands() {
+    return {
+      toggleHighlight:
+        () =>
+        ({ commands }) => {
+          return commands.toggleMark(this.name)
+        }
+    }
+  }
+})
diff --git a/src/renderer/src/components/RichEditor/index.tsx b/src/renderer/src/components/RichEditor/index.tsx
index 793ccda1ae..0d93330f47 100644
--- a/src/renderer/src/components/RichEditor/index.tsx
+++ b/src/renderer/src/components/RichEditor/index.tsx
@@ -212,7 +212,6 @@ const RichEditor = ({
     tableOfContentsItems,
     linkEditor,
     setMarkdown,
-    setHtml,
     clear,
     getPreviewText
   } = useRichEditor({
@@ -419,8 +418,8 @@ const RichEditor = ({
           const { from, to, $from } = selection
 
           // 如果当前已经是链接，则取消链接
-          if (editor.isActive('enhancedLink')) {
-            editor.chain().focus().unsetEnhancedLink().run()
+          if (editor.isActive('link')) {
+            editor.chain().focus().unsetLink().run()
           } else {
             // 获取当前段落的文本内容
             if (from !== to) {
@@ -429,7 +428,7 @@ const RichEditor = ({
                 const url = selectedText.trim().startsWith('http')
                   ? selectedText.trim()
                   : `https://${selectedText.trim()}`
-                editor.chain().focus().setTextSelection({ from, to }).setEnhancedLink({ href: url }).run()
+                editor.chain().focus().setTextSelection({ from, to }).setLink({ href: url }).run()
               }
             } else {
               const paragraphText = $from.parent.textContent
@@ -444,13 +443,13 @@ const RichEditor = ({
                   const { $from } = selection
                   const start = $from.start()
                   const end = $from.end()
-                  editor.chain().focus().setTextSelection({ from: start, to: end }).setEnhancedLink({ href: url }).run()
+                  editor.chain().focus().setTextSelection({ from: start, to: end }).setLink({ href: url }).run()
                 } catch (error) {
-                  logger.warn('Failed to set enhanced link:', error as Error)
-                  editor.chain().focus().toggleEnhancedLink({ href: '' }).run()
+                  logger.warn('Failed to set link:', error as Error)
+                  editor.chain().focus().toggleLink({ href: '' }).run()
                 }
               } else {
-                editor.chain().focus().toggleEnhancedLink({ href: '' }).run()
+                editor.chain().focus().toggleLink({ href: '' }).run()
               }
             }
           }
@@ -476,6 +475,10 @@ const RichEditor = ({
           break
         case 'taskList':
           editor.chain().focus().toggleTaskList().run()
+          break
+        case 'highlight':
+          editor.chain().focus().toggleHighlight().run()
+          break
       }
     },
     [editor]
@@ -489,10 +492,7 @@ const RichEditor = ({
       getHtml: () => html,
       getMarkdown: () => markdown,
       setContent: (content: string) => {
-        editor?.commands.setContent(content)
-      },
-      setHtml: (htmlContent: string) => {
-        setHtml(htmlContent)
+        editor?.commands.setContent(content, { contentType: 'markdown' })
       },
       setMarkdown: (markdownContent: string) => {
         setMarkdown(markdownContent)
@@ -513,7 +513,7 @@ const RichEditor = ({
         }
       },
       getPreviewText: (maxLength?: number) => {
-        return getPreviewText(markdown, maxLength)
+        return getPreviewText(maxLength)
       },
       getScrollTop: () => {
         return scrollContainerRef.current?.scrollTop ?? 0
@@ -548,7 +548,7 @@ const RichEditor = ({
       getAllCommands,
       getToolbarCommands
     }),
-    [editor, html, markdown, setHtml, setMarkdown, clear, getPreviewText]
+    [editor, html, markdown, setMarkdown, clear, getPreviewText]
   )
 
   return (
diff --git a/src/renderer/src/components/RichEditor/toolbar.tsx b/src/renderer/src/components/RichEditor/toolbar.tsx
index ebed37349e..e6e31e79a3 100644
--- a/src/renderer/src/components/RichEditor/toolbar.tsx
+++ b/src/renderer/src/components/RichEditor/toolbar.tsx
@@ -71,7 +71,8 @@ const getTooltipText = (t: TFunction, command: FormattingCommand): string => {
     table: t('richEditor.toolbar.table'),
     image: t('richEditor.toolbar.image'),
     blockMath: t('richEditor.toolbar.blockMath'),
-    inlineMath: t('richEditor.toolbar.inlineMath')
+    inlineMath: t('richEditor.toolbar.inlineMath'),
+    highlight: t('richEditor.toolbar.highlight')
   }
 
   return tooltipMap[command] || command
@@ -300,6 +301,8 @@ function getFormattingState(state: FormattingState, command: FormattingCommand):
       return state?.isMath || false
     case 'inlineMath':
       return state?.isInlineMath || false
+    case 'highlight':
+      return state?.isHighlight || false
     default:
       return false
   }
diff --git a/src/renderer/src/components/RichEditor/types.ts b/src/renderer/src/components/RichEditor/types.ts
index 15727e1a8d..5e2bdc2fe3 100644
--- a/src/renderer/src/components/RichEditor/types.ts
+++ b/src/renderer/src/components/RichEditor/types.ts
@@ -93,8 +93,6 @@ export interface RichEditorRef {
   getMarkdown: () => string
   /** Set editor content (plain text) */
   setContent: (content: string) => void
-  /** Set editor HTML content */
-  setHtml: (html: string) => void
   /** Set editor Markdown content */
   setMarkdown: (markdown: string) => void
   /** Focus the editor */
@@ -197,6 +195,8 @@ export interface FormattingState {
   canMath: boolean
   /** Whether taskList is active */
   isTaskList: boolean
+  /** Whether highlight is active */
+  isHighlight: boolean
 }
 
 export type FormattingCommand =
@@ -225,6 +225,7 @@ export type FormattingCommand =
   | 'table'
   | 'taskList'
   | 'image'
+  | 'highlight'
 
 export interface ToolbarProps {
   /** Editor instance ref */
diff --git a/src/renderer/src/components/RichEditor/useRichEditor.ts b/src/renderer/src/components/RichEditor/useRichEditor.ts
index cc73892deb..5285b7b6ea 100644
--- a/src/renderer/src/components/RichEditor/useRichEditor.ts
+++ b/src/renderer/src/components/RichEditor/useRichEditor.ts
@@ -5,12 +5,6 @@ import { loggerService } from '@logger'
 import { MARKDOWN_SOURCE_LINE_ATTR } from '@renderer/components/RichEditor/constants'
 import type { FormattingState } from '@renderer/components/RichEditor/types'
 import { useCodeStyle } from '@renderer/context/CodeStyleProvider'
-import {
-  htmlToMarkdown,
-  isMarkdownContent,
-  markdownToHtml,
-  markdownToPreviewText
-} from '@renderer/utils/markdownConverter'
 import type { Editor } from '@tiptap/core'
 import { Extension } from '@tiptap/core'
 import { TaskItem, TaskList } from '@tiptap/extension-list'
@@ -22,8 +16,9 @@ import {
   TableOfContents
 } from '@tiptap/extension-table-of-contents'
 import Typography from '@tiptap/extension-typography'
+import { Markdown } from '@tiptap/markdown'
 import { useEditor, useEditorState } from '@tiptap/react'
-import { StarterKit } from '@tiptap/starter-kit'
+import StarterKit from '@tiptap/starter-kit'
 import { t } from 'i18next'
 import { useCallback, useEffect, useMemo, useState } from 'react'
 
@@ -32,6 +27,7 @@ import { CodeBlockShiki } from './extensions/code-block-shiki/code-block-shiki'
 import { EnhancedImage } from './extensions/enhanced-image'
 import { EnhancedLink } from './extensions/enhanced-link'
 import { EnhancedMath } from './extensions/enhanced-math'
+import { Highlight } from './extensions/hightlight'
 import { Placeholder } from './extensions/placeholder'
 import { YamlFrontMatter } from './extensions/yaml-front-matter'
 import { blobToArrayBuffer, compressImage, shouldCompressImage } from './helpers/imageUtils'
@@ -105,8 +101,6 @@ export interface UseRichEditorReturn {
   html: string
   /** Preview text for display */
   previewText: string
-  /** Whether content is detected as markdown */
-  isMarkdown: boolean
   /** Whether editor is disabled */
   disabled: boolean
   /** Current formatting state from TipTap editor */
@@ -125,19 +119,11 @@ export interface UseRichEditorReturn {
 
   /** Set markdown content */
   setMarkdown: (content: string) => void
-  /** Set HTML content (converts to markdown) */
-  setHtml: (html: string) => void
   /** Clear all content */
   clear: () => void
 
-  /** Convert markdown to HTML */
-  toHtml: (markdown: string) => string
-  /** Convert markdown to safe HTML */
-  toSafeHtml: (markdown: string) => string
-  /** Convert HTML to markdown */
-  toMarkdown: (html: string) => string
   /** Get preview text from markdown */
-  getPreviewText: (markdown: string, maxLength?: number) => string
+  getPreviewText: (maxLength?: number) => string
 }
 
 /**
@@ -162,20 +148,6 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
 
   const [markdown, setMarkdownState] = useState<string>(initialContent)
 
-  const html = useMemo(() => {
-    if (!markdown) return ''
-    return markdownToHtml(markdown)
-  }, [markdown])
-
-  const previewText = useMemo(() => {
-    if (!markdown) return ''
-    return markdownToPreviewText(markdown, previewLength)
-  }, [markdown, previewLength])
-
-  const isMarkdown = useMemo(() => {
-    return isMarkdownContent(markdown)
-  }, [markdown])
-
   // Get theme and language mapping from CodeStyleProvider
   const { activeShikiTheme } = useCodeStyle()
 
@@ -223,6 +195,10 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
   // TipTap editor extensions
   const extensions = useMemo(
     () => [
+      Markdown.configure({
+        markedOptions: { gfm: true },
+        html: true // Enable HTML support to preserve <u> tags for underline
+      }),
       SourceLineAttribute,
       StarterKit.configure({
         heading: {
@@ -230,6 +206,7 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
         },
         codeBlock: false,
         link: false
+        // underline is enabled by default in StarterKit
       }),
       EnhancedLink.configure({
         onLinkHover: handleLinkHover,
@@ -380,7 +357,8 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
       TaskList,
       TaskItem.configure({
         nested: true
-      })
+      }),
+      Highlight
     ],
     // eslint-disable-next-line react-hooks/exhaustive-deps
     [placeholder, activeShikiTheme, handleLinkHover, handleLinkHoverEnd]
@@ -389,7 +367,8 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
   const editor = useEditor({
     shouldRerenderOnTransaction: true,
     extensions,
-    content: html || '',
+    content: markdown || '',
+    contentType: 'markdown',
     editable: editable,
     editorProps: {
       handlePaste: (view, event) => {
@@ -446,9 +425,7 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
             return true
           }
 
-          // Otherwise (at start of paragraph, or multi-line paste): convert markdown to HTML
-          const html = markdownToHtml(text)
-          editor.commands.insertContent(html)
+          editor.commands.insertContent(text, { contentType: 'markdown' })
           onPaste?.(html)
           return true
         }
@@ -466,10 +443,10 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
     onUpdate: ({ editor }) => {
       const content = editor.getText()
       const htmlContent = editor.getHTML()
+      const markdownContent = editor.getMarkdown()
       try {
-        const convertedMarkdown = htmlToMarkdown(htmlContent)
-        setMarkdownState(convertedMarkdown)
-        onChange?.(convertedMarkdown)
+        setMarkdownState(markdownContent)
+        onChange?.(markdownContent)
 
         onContentChange?.(content)
         if (onHtmlChange) {
@@ -492,6 +469,9 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
     }
   })
 
+  const html = editor.getHTML()
+  const previewText = editor.getText().slice(0, previewLength)
+
   // Handle image paste function
   const handleImagePaste = useCallback(
     async (file: File) => {
@@ -579,7 +559,7 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
           .setTextSelection({ from: linkRange.from, to: linkRange.to })
           .insertContent(text)
           .setTextSelection({ from: linkRange.from, to: linkRange.from + text.length })
-          .setEnhancedLink({ href })
+          .setLink({ href })
           .run()
       }
       setLinkEditorState({
@@ -599,11 +579,11 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
     if (linkRange) {
       // Use a more reliable method - directly remove the mark from the range
       const tr = editor.state.tr
-      tr.removeMark(linkRange.from, linkRange.to, editor.schema.marks.enhancedLink || editor.schema.marks.link)
+      tr.removeMark(linkRange.from, linkRange.to, editor.schema.marks.link)
       editor.view.dispatch(tr)
     } else {
       // No explicit range - try to extend current mark range and remove
-      editor.chain().focus().extendMarkRange('enhancedLink').unsetEnhancedLink().run()
+      editor.chain().focus().extendMarkRange('link').unsetLink().run()
     }
 
     // Close link editor
@@ -727,7 +707,8 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
           isMath: false,
           isInlineMath: false,
           canMath: false,
-          isTaskList: false
+          isTaskList: false,
+          isHighlight: false
         }
       }
 
@@ -754,9 +735,9 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
         isOrderedList: editor.isActive('orderedList') ?? false,
         isCodeBlock: editor.isActive('codeBlock') ?? false,
         isBlockquote: editor.isActive('blockquote') ?? false,
-        isLink: (editor.isActive('enhancedLink') || editor.isActive('link')) ?? false,
-        canLink: editor.can().chain().setEnhancedLink({ href: '' }).run() ?? false,
-        canUnlink: editor.can().chain().unsetEnhancedLink().run() ?? false,
+        isLink: editor.isActive('link') ?? false,
+        canLink: editor.can().chain().setLink({ href: '' }).run() ?? false,
+        canUnlink: editor.can().chain().unsetLink().run() ?? false,
         canUndo: editor.can().chain().undo().run() ?? false,
         canRedo: editor.can().chain().redo().run() ?? false,
         isTable: editor.isActive('table') ?? false,
@@ -765,7 +746,8 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
         isMath: editor.isActive('blockMath') ?? false,
         isInlineMath: editor.isActive('inlineMath') ?? false,
         canMath: true,
-        isTaskList: editor.isActive('taskList') ?? false
+        isTaskList: editor.isActive('taskList') ?? false,
+        isHighlight: editor.isActive('highlight') ?? false
       }
     }
   })
@@ -776,33 +758,12 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
         setMarkdownState(content)
         onChange?.(content)
 
-        const convertedHtml = markdownToHtml(content)
-
-        editor.commands.setContent(convertedHtml)
-
-        onHtmlChange?.(convertedHtml)
+        editor.commands.setContent(content, { contentType: 'markdown' })
       } catch (error) {
         logger.error('Error setting markdown content:', error as Error)
       }
     },
-    [editor.commands, onChange, onHtmlChange]
-  )
-
-  const setHtml = useCallback(
-    (htmlContent: string) => {
-      try {
-        const convertedMarkdown = htmlToMarkdown(htmlContent)
-        setMarkdownState(convertedMarkdown)
-        onChange?.(convertedMarkdown)
-
-        editor.commands.setContent(htmlContent)
-
-        onHtmlChange?.(htmlContent)
-      } catch (error) {
-        logger.error('Error setting HTML content:', error as Error)
-      }
-    },
-    [editor.commands, onChange, onHtmlChange]
+    [editor.commands, onChange]
   )
 
   const clear = useCallback(() => {
@@ -811,55 +772,25 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
     onHtmlChange?.('')
   }, [onChange, onHtmlChange])
 
-  // Utility methods
-  const toHtml = useCallback((content: string): string => {
-    try {
-      return markdownToHtml(content)
-    } catch (error) {
-      logger.error('Error converting markdown to HTML:', error as Error)
-      return ''
-    }
-  }, [])
-
-  const toSafeHtml = useCallback((content: string): string => {
-    try {
-      return markdownToHtml(content)
-    } catch (error) {
-      logger.error('Error converting markdown to safe HTML:', error as Error)
-      return ''
-    }
-  }, [])
-
-  const toMarkdown = useCallback((htmlContent: string): string => {
-    try {
-      return htmlToMarkdown(htmlContent)
-    } catch (error) {
-      logger.error('Error converting HTML to markdown:', error as Error)
-      return ''
-    }
-  }, [])
-
   const getPreviewText = useCallback(
-    (content: string, maxLength?: number): string => {
+    (maxLength?: number): string => {
       try {
-        return markdownToPreviewText(content, maxLength || previewLength)
+        return editor.getText().slice(0, maxLength || previewLength)
       } catch (error) {
         logger.error('Error generating preview text:', error as Error)
         return ''
       }
     },
-    [previewLength]
+    [editor, previewLength]
   )
 
   return {
     // Editor instance
     editor,
-
     // State
     markdown,
     html,
     previewText,
-    isMarkdown,
     disabled: !editable,
     formattingState,
     tableOfContentsItems,
@@ -874,13 +805,7 @@ export const useRichEditor = (options: UseRichEditorOptions = {}): UseRichEditor
 
     // Actions
     setMarkdown,
-    setHtml,
     clear,
-
-    // Utilities
-    toHtml,
-    toSafeHtml,
-    toMarkdown,
     getPreviewText
   }
 }
diff --git a/src/renderer/src/i18n/locales/en-us.json b/src/renderer/src/i18n/locales/en-us.json
index ab3bedef6a..5daf12d03c 100644
--- a/src/renderer/src/i18n/locales/en-us.json
+++ b/src/renderer/src/i18n/locales/en-us.json
@@ -2599,6 +2599,7 @@
       "heading4": "Heading 4",
       "heading5": "Heading 5",
       "heading6": "Heading 6",
+      "highlight": "Highlight",
       "image": "Image",
       "inlineMath": "Inline Equation",
       "italic": "Italic",
diff --git a/src/renderer/src/i18n/locales/zh-cn.json b/src/renderer/src/i18n/locales/zh-cn.json
index b477e075c6..7491ef8d02 100644
--- a/src/renderer/src/i18n/locales/zh-cn.json
+++ b/src/renderer/src/i18n/locales/zh-cn.json
@@ -2599,6 +2599,7 @@
       "heading4": "四级标题",
       "heading5": "五级标题",
       "heading6": "六级标题",
+      "hightlight": "高亮",
       "image": "图片",
       "inlineMath": "行内数学公式",
       "italic": "斜体",
diff --git a/src/renderer/src/utils/__tests__/markdownConverter.test.ts b/src/renderer/src/utils/__tests__/markdownConverter.test.ts
deleted file mode 100644
index 25a330b114..0000000000
--- a/src/renderer/src/utils/__tests__/markdownConverter.test.ts
+++ /dev/null
@@ -1,554 +0,0 @@
-import { MARKDOWN_SOURCE_LINE_ATTR } from '@renderer/components/RichEditor/constants'
-import { describe, expect, it } from 'vitest'
-
-import { htmlToMarkdown, markdownToHtml } from '../markdownConverter'
-
-/**
- * Strip markdown line number attributes for testing HTML structure
- */
-
-const LINE_NUMBER_REGEX = new RegExp(`\\s*${MARKDOWN_SOURCE_LINE_ATTR.replace(/-/g, '\\-')}="\\d+"`, 'g')
-
-function stripLineNumbers(html: string): string {
-  return html.replace(LINE_NUMBER_REGEX, '')
-}
-
-describe('markdownConverter', () => {
-  describe('htmlToMarkdown', () => {
-    it('should convert HTML to Markdown', () => {
-      const html = '<h1>Hello World</h1>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('# Hello World')
-    })
-
-    it('should keep <br> to <br>', () => {
-      const html = '<p>Text with<br>\nindentation<br>\nand without indentation</p>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('Text with<br>indentation<br>and without indentation')
-    })
-
-    it('should convert task list HTML back to Markdown', () => {
-      const html =
-        '<ul data-type="taskList" class="task-list"><li data-type="taskItem" class="task-list-item" data-checked="false"><input type="checkbox" disabled> abcd</li><li data-type="taskItem" class="task-list-item" data-checked="true"><input type="checkbox" checked disabled> efgh</li></ul>'
-      const result = htmlToMarkdown(html)
-      expect(result).toContain('- [ ] abcd')
-      expect(result).toContain('- [x] efgh')
-    })
-
-    it('should convert task list HTML back to Markdown with label', () => {
-      const html =
-        '<ul data-type="taskList" class="task-list"><li data-type="taskItem" class="task-list-item" data-checked="false"><label><input type="checkbox"> abcd</label></li><li data-type="taskItem" class="task-list-item" data-checked="true"><label><input type="checkbox" checked> efgh</label></li></ul>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('- [ ] abcd\n\n- [x] efgh')
-    })
-
-    it('should handle empty HTML', () => {
-      const result = htmlToMarkdown('')
-      expect(result).toBe('')
-    })
-
-    it('should handle null/undefined input', () => {
-      expect(htmlToMarkdown(null as any)).toBe('')
-      expect(htmlToMarkdown(undefined as any)).toBe('')
-    })
-
-    it('should keep math block containers intact', () => {
-      const html = '<div data-latex="a+b+c" data-type="block-math"></div>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('$$a+b+c$$')
-    })
-
-    it('should convert multiple math blocks to Markdown', () => {
-      const html =
-        '<div data-latex="\\begin{array}{c}\n\\nabla \\times \\vec{\\mathbf{B}} -\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{E}}}{\\partial t} &amp;\n= \\frac{4\\pi}{c}\\vec{\\mathbf{j}}    \\nabla \\cdot \\vec{\\mathbf{E}} &amp; = 4 \\pi \\rho \\\\\n\n\\nabla \\times \\vec{\\mathbf{E}}\\, +\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{B}}}{\\partial t} &amp; = \\vec{\\mathbf{0}} \\\\\n\n\\nabla \\cdot \\vec{\\mathbf{B}} &amp; = 0\n\n\\end{array}" data-type="block-math"></div>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe(
-        '$$\\begin{array}{c}\n\\nabla \\times \\vec{\\mathbf{B}} -\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{E}}}{\\partial t} &\n= \\frac{4\\pi}{c}\\vec{\\mathbf{j}}    \\nabla \\cdot \\vec{\\mathbf{E}} & = 4 \\pi \\rho \\\\\n\n\\nabla \\times \\vec{\\mathbf{E}}\\, +\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{B}}}{\\partial t} & = \\vec{\\mathbf{0}} \\\\\n\n\\nabla \\cdot \\vec{\\mathbf{B}} & = 0\n\n\\end{array}$$'
-      )
-    })
-
-    it('should convert math inline syntax to Markdown', () => {
-      const html = '<span data-latex="a+b+c" data-type="inline-math"></span>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('$a+b+c$')
-    })
-
-    it('shoud convert multiple math blocks and inline math to Markdown', () => {
-      const html =
-        '<div data-latex="a+b+c" data-type="block-math"></div><p><span data-latex="d+e+f" data-type="inline-math"></span></p>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('$$a+b+c$$\n\n$d+e+f$')
-    })
-
-    it('should convert heading and img to Markdown', () => {
-      const html = '<h1>Hello</h1>\n<p><img src="https://example.com/image.png" alt="alt text" /></p>\n'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('# Hello\n\n![alt text](https://example.com/image.png)')
-    })
-
-    it('should convert heading and paragraph to Markdown', () => {
-      const html = '<h1>Hello</h1>\n<p>Hello</p>\n'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('# Hello\n\nHello')
-    })
-
-    it('should convert code block to Markdown', () => {
-      const html = '<pre><code>console.log("Hello, world!");</code></pre>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('```\nconsole.log("Hello, world!");\n```')
-    })
-
-    it('should convert code block with language to Markdown', () => {
-      const html = '<pre><code class="language-javascript">console.log("Hello, world!");</code></pre>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('```javascript\nconsole.log("Hello, world!");\n```')
-    })
-
-    it('should convert table to Markdown', () => {
-      const html =
-        '<table><tbody><tr><th ><p>f</p></th><th ><p></p></th><th ><p></p></th></tr><tr><td ><p></p></td><td ><p>f</p></td><td ><p></p></td></tr><tr><td ><p></p></td><td ><p></p></td><td ><p>f</p></td></tr></tbody></table><p></p>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('| f   |     |     |\n| --- | --- | --- |\n|     | f   |     |\n|     |     | f   |')
-    })
-  })
-
-  describe('markdownToHtml', () => {
-    it('should convert <br> to <br>', () => {
-      const markdown = 'Text with<br>\nindentation<br>\nand without indentation'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<p>Text with<br>\nindentation<br>\nand without indentation</p>\n')
-    })
-
-    it('should handle indentation in blockquotes', () => {
-      const markdown = '> Quote line 1\n>   Quote line 2 with indentation'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      // This should preserve indentation within the blockquote
-      expect(result).toContain('Quote line 1')
-      expect(result).toContain('Quote line 2 with indentation')
-    })
-
-    it('should preserve indentation in nested lists', () => {
-      const markdown = '- Item 1\n  - Nested item\n    - Double nested\n      with continued line'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      // Should create proper nested list structure
-      expect(result).toContain('<ul>')
-      expect(result).toContain('<li>')
-    })
-
-    it('should handle poetry or formatted text with indentation', () => {
-      const markdown = 'Roses are red\n    Violets are blue\n        Sugar is sweet\n            And so are you'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<p>Roses are red\nViolets are blue\nSugar is sweet\nAnd so are you</p>\n')
-    })
-
-    it('should preserve indentation after line breaks with multiple paragraphs', () => {
-      const markdown = 'First paragraph\n\n    with indentation\n\n    Second paragraph\n\nwith different indentation'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe(
-        '<p>First paragraph</p>\n<pre><code>with indentation\n\nSecond paragraph\n</code></pre><p>with different indentation</p>\n'
-      )
-    })
-
-    it('should handle zero-width indentation (just line break)', () => {
-      const markdown = 'Hello\n\nWorld'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<p>Hello</p>\n<p>World</p>\n')
-    })
-
-    it('should preserve indentation in mixed content', () => {
-      const markdown =
-        'Normal text\n  Indented continuation\n\n- List item\n    List continuation\n\n> Quote\n>   Indented quote'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe(
-        '<p>Normal text\nIndented continuation</p>\n<ul>\n<li>List item\nList continuation</li>\n</ul>\n<blockquote>\n<p>Quote\nIndented quote</p>\n</blockquote>\n'
-      )
-    })
-
-    it('should convert Markdown to HTML', () => {
-      const markdown = '# Hello World'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('<h1>Hello World</h1>')
-    })
-
-    it('should convert math block syntax to HTML', () => {
-      const markdown = '$$a+b+c$$'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('<div data-latex="a+b+c" data-type="block-math"></div>')
-    })
-
-    it('should convert math inline syntax to HTML', () => {
-      const markdown = '$a+b+c$'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('<span data-latex="a+b+c" data-type="inline-math"></span>')
-    })
-
-    it('should convert multiple math blocks to HTML', () => {
-      const markdown = `$$\\begin{array}{c}
-\\nabla \\times \\vec{\\mathbf{B}} -\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{E}}}{\\partial t} &
-= \\frac{4\\pi}{c}\\vec{\\mathbf{j}}    \\nabla \\cdot \\vec{\\mathbf{E}} & = 4 \\pi \\rho \\\\
-
-\\nabla \\times \\vec{\\mathbf{E}}\\, +\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{B}}}{\\partial t} & = \\vec{\\mathbf{0}} \\\\
-
-\\nabla \\cdot \\vec{\\mathbf{B}} & = 0
-
-\\end{array}$$`
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain(
-        '<div data-latex="\\begin{array}{c}\n\\nabla \\times \\vec{\\mathbf{B}} -\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{E}}}{\\partial t} &amp;\n= \\frac{4\\pi}{c}\\vec{\\mathbf{j}}    \\nabla \\cdot \\vec{\\mathbf{E}} &amp; = 4 \\pi \\rho \\\\\n\n\\nabla \\times \\vec{\\mathbf{E}}\\, +\\, \\frac1c\\, \\frac{\\partial\\vec{\\mathbf{B}}}{\\partial t} &amp; = \\vec{\\mathbf{0}} \\\\\n\n\\nabla \\cdot \\vec{\\mathbf{B}} &amp; = 0\n\n\\end{array}" data-type="block-math"></div>'
-      )
-    })
-
-    it('should convert task list syntax to proper HTML', () => {
-      const markdown = '- [ ] abcd\n\n- [x] efgh\n\n'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('data-type="taskList"')
-      expect(result).toContain('data-type="taskItem"')
-      expect(result).toContain('data-checked="false"')
-      expect(result).toContain('data-checked="true"')
-      expect(result).toContain('<input type="checkbox" disabled>')
-      expect(result).toContain('<input type="checkbox" checked disabled>')
-      expect(result).toContain('abcd')
-      expect(result).toContain('efgh')
-    })
-
-    it('should convert mixed task list with checked and unchecked items', () => {
-      const markdown = '- [ ] First task\n\n- [x] Second task\n\n- [ ] Third task'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('data-type="taskList"')
-      expect(result).toContain('First task')
-      expect(result).toContain('Second task')
-      expect(result).toContain('Third task')
-      expect(result.match(/data-checked="false"/g)).toHaveLength(2)
-      expect(result.match(/data-checked="true"/g)).toHaveLength(1)
-    })
-
-    it('should NOT convert standalone task syntax to task list', () => {
-      const markdown = '[x] abcd'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('<p>[x] abcd</p>')
-      expect(result).not.toContain('data-type="taskList"')
-    })
-
-    it('should handle regular list items alongside task lists', () => {
-      const markdown = '- Regular item\n\n- [ ] Task item\n\n- Another regular item'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toContain('data-type="taskList"')
-      expect(result).toContain('Regular item')
-      expect(result).toContain('Task item')
-      expect(result).toContain('Another regular item')
-    })
-
-    it('should handle empty Markdown', () => {
-      const result = markdownToHtml('')
-      expect(result).toBe('')
-    })
-
-    it('should handle null/undefined input', () => {
-      expect(markdownToHtml(null as any)).toBe('')
-      expect(markdownToHtml(undefined as any)).toBe('')
-    })
-
-    it('should handle heading and img', () => {
-      const markdown = `# 🌠 Screenshot
-
-![](https://example.com/image.png)`
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<h1>🌠 Screenshot</h1>\n<p><img src="https://example.com/image.png" alt="" /></p>\n')
-    })
-
-    it('should handle heading and paragraph', () => {
-      const markdown = '# Hello\n\nHello'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<h1>Hello</h1>\n<p>Hello</p>\n')
-    })
-
-    it('should convert code block to HTML', () => {
-      const markdown = '```\nconsole.log("Hello, world!");\n```'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<pre><code>console.log(&#x22;Hello, world!&#x22;);\n</code></pre>')
-    })
-
-    it('should convert code block with language to HTML', () => {
-      const markdown = '```javascript\nconsole.log("Hello, world!");\n```'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe(
-        '<pre><code class="language-javascript">console.log(&#x22;Hello, world!&#x22;);\n</code></pre>'
-      )
-    })
-
-    it('should convert table to HTML', () => {
-      const markdown = '| f   |     |     |\n| --- | --- | --- |\n|     | f   |     |\n|     |     | f   |'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe(
-        '<table>\n<thead>\n<tr>\n<th>f</th>\n<th></th>\n<th></th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td></td>\n<td>f</td>\n<td></td>\n</tr>\n<tr>\n<td></td>\n<td></td>\n<td>f</td>\n</tr>\n</tbody>\n</table>\n'
-      )
-    })
-
-    it('should escape XML-like tags in code blocks', () => {
-      const markdown = '```jsx\nconst component = <><div>content</div></>\n```'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe(
-        '<pre><code class="language-jsx">const component = &#x3C;&#x3E;&#x3C;div&#x3E;content&#x3C;/div&#x3E;&#x3C;/&#x3E;\n</code></pre>'
-      )
-    })
-
-    it('should escape XML-like tags in inline code', () => {
-      const markdown = 'Use `<>` for fragments'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<p>Use <code>&#x3C;&#x3E;</code> for fragments</p>\n')
-    })
-
-    it('shoud convert XML-like tags in paragraph', () => {
-      const markdown = '<abc></abc>'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<p><abc></abc></p>\n')
-    })
-  })
-
-  describe('Task List with Labels', () => {
-    it('should wrap task items with labels when label option is true', () => {
-      const markdown = '- [ ] abcd\n\n- [x] efgh'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe(
-        '<ul data-type="taskList" class="task-list">\n<li data-type="taskItem" class="task-list-item" data-checked="false">\n<p><label><input type="checkbox" disabled> abcd</label></p>\n</li>\n<li data-type="taskItem" class="task-list-item" data-checked="true">\n<p><label><input type="checkbox" checked disabled> efgh</label></p>\n</li>\n</ul>\n'
-      )
-    })
-  })
-
-  describe('Task List Round Trip', () => {
-    it('should maintain task list structure through markdown → html → markdown conversion', () => {
-      const originalMarkdown = '- [ ] abcd\n\n- [x] efgh'
-      const html = markdownToHtml(originalMarkdown)
-      const backToMarkdown = htmlToMarkdown(html)
-
-      expect(backToMarkdown).toBe(originalMarkdown)
-    })
-
-    it('should maintain task list structure through html → markdown → html conversion', () => {
-      const originalHtml =
-        '<ul data-type="taskList" class="task-list"><li data-type="taskItem" class="task-list-item" data-checked="false"><label><input type="checkbox" disabled></label><div><p></p></div></li></ul>'
-      const markdown = htmlToMarkdown(originalHtml)
-      const html = stripLineNumbers(markdownToHtml(markdown))
-
-      expect(html).toBe(
-        '<ul data-type="taskList" class="task-list">\n<li data-type="taskItem" class="task-list-item" data-checked="false"><label><input type="checkbox" disabled></label><div><p></p></div></li>\n</ul>\n'
-      )
-    })
-
-    it('should maintain task list structure through html → markdown → html conversion2', () => {
-      const originalHtml =
-        '<ul data-type="taskList" class="task-list">\n<li data-type="taskItem" class="task-list-item" data-checked="false">\n<label><input type="checkbox" disabled></label><div><p>123</p></div>\n</li>\n<li data-type="taskItem" class="task-list-item" data-checked="false">\n<label><input type="checkbox" disabled></label><div><p></p></div>\n</li>\n</ul>\n'
-      const markdown = htmlToMarkdown(originalHtml)
-      const html = stripLineNumbers(markdownToHtml(markdown))
-
-      expect(html).toBe(originalHtml)
-    })
-
-    it('should handle complex task lists with multiple items', () => {
-      const originalMarkdown =
-        '- [ ] First unchecked task\n\n- [x] First checked task\n\n- [ ] Second unchecked task\n\n- [x] Second checked task'
-      const html = markdownToHtml(originalMarkdown)
-      const backToMarkdown = htmlToMarkdown(html)
-
-      expect(backToMarkdown).toBe(originalMarkdown)
-    })
-  })
-
-  describe('LaTeX Escaping in Tables', () => {
-    it('should test simple inline math with backslashes', () => {
-      const html = '<span data-latex="\\int_{-\\infty}^{\\infty}" data-type="inline-math"></span>'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('$\\int_{-\\infty}^{\\infty}$')
-    })
-
-    it('should test inline math within table structure', () => {
-      const tableHtml =
-        '<table><thead><tr><th>Formula</th><th>Description</th></tr></thead><tbody><tr><td><span data-latex="\\int_{-\\infty}^{\\infty} e^{-x&sup2;} dx = \\sqrt{\\pi}" data-type="inline-math"></span></td><td>Gaussian integral</td></tr></tbody></table>'
-      const result = htmlToMarkdown(tableHtml)
-      expect(result).toContain('$\\int_{-\\infty}^{\\infty} e^{-x²} dx = \\sqrt{\\pi}$')
-    })
-
-    it('should preserve LaTeX backslashes in table cells during round trip conversion', () => {
-      const tableWithLatex =
-        '| Formula | Description |\n| --- | --- |\n| $\\int_{-\\infty}^{\\infty} e^{-x²} dx = \\sqrt{\\pi}$ | Gaussian integral |'
-      const html = markdownToHtml(tableWithLatex)
-      const backToMarkdown = htmlToMarkdown(html)
-
-      // The LaTeX formula should preserve its backslashes
-      expect(backToMarkdown).toContain('$\\int_{-\\infty}^{\\infty} e^{-x²} dx = \\sqrt{\\pi}$')
-      expect(backToMarkdown).not.toContain('$\\\\int_{-\\\\infty}^{\\\\infty} e^{-x²} dx = \\\\sqrt{\\\\pi}$')
-    })
-
-    it('should handle LaTeX in table cells without double escaping', () => {
-      const markdown =
-        '| Math | Result |\n| --- | --- |\n| $E = mc^2$ | Energy-mass equivalence |\n| $\\sum_{i=1}^{n} i = \\frac{n(n+1)}{2}$ | Sum formula |'
-      const html = markdownToHtml(markdown)
-      const result = htmlToMarkdown(html)
-
-      expect(result).toContain('$E = mc^2$')
-      expect(result).toContain('$\\sum_{i=1}^{n} i = \\frac{n(n+1)}{2}$')
-      expect(result).not.toContain('$\\\\sum_{i=1}^{n} i = \\\\frac{n(n+1)}{2}$')
-    })
-  })
-
-  describe('markdown image', () => {
-    it('should convert markdown image to HTML img tag', () => {
-      const markdown = '![foo](train.jpg)'
-      const result = stripLineNumbers(markdownToHtml(markdown))
-      expect(result).toBe('<p><img src="train.jpg" alt="foo" /></p>\n')
-    })
-    it('should convert markdown image with file:// protocol to HTML img tag', () => {
-      const markdown =
-        '![pasted_image_45285c9c-a7cd-4c3d-a9b6-6854c3bbe479.png](file:///Users/xxxx/Library/Application Support/CherryStudioDev/Data/Files/45285c9c-a7cd-4c3d-a9b6-6854c3bbe479.png)'
-      const result = markdownToHtml(markdown)
-      expect(result).toContain(
-        '<img src="file:///Users/xxxx/Library/Application Support/CherryStudioDev/Data/Files/45285c9c-a7cd-4c3d-a9b6-6854c3bbe479.png" alt="pasted_image_45285c9c-a7cd-4c3d-a9b6-6854c3bbe479.png" />'
-      )
-    })
-
-    it('should handle file:// protocol images differently from http images', () => {
-      const markdown =
-        'Local: ![Local image](file:///path/to/local.png)\\n\\nRemote: ![Remote image](https://example.com/remote.png)'
-      const result = markdownToHtml(markdown)
-      // file:// should be converted to HTML img tag
-      expect(result).toContain('<img src="file:///path/to/local.png" alt="Local image" />')
-      // https:// should be processed by markdown-it normally
-      expect(result).toContain('<img src="https://example.com/remote.png" alt="Remote image" />')
-    })
-
-    it('should handle images with spaces in file:// protocol paths', () => {
-      const markdown = '![My Image](file:///path/to/my image with spaces.png)'
-      const result = htmlToMarkdown(markdownToHtml(markdown))
-      expect(result).toBe(markdown)
-    })
-
-    it('shoud img label to markdown', () => {
-      const html = '<img src="file:///path/to/my image with spaces.png" alt="My Image" />'
-      const result = htmlToMarkdown(html)
-      expect(result).toBe('![My Image](file:///path/to/my image with spaces.png)')
-    })
-  })
-
-  it('should handle hardbreak with backslash followed by indented text', () => {
-    const markdown = 'Text with \\\n    indentation \\\nand without indentation'
-    const result = stripLineNumbers(markdownToHtml(markdown))
-    expect(result).toBe('<p>Text with <br />\nindentation <br />\nand without indentation</p>\n')
-  })
-
-  describe('Custom XML Tags Preservation', () => {
-    it('should preserve custom XML tags through markdown-to-HTML and HTML-to-markdown conversion', () => {
-      const markdown = 'Some text with <custom-tag>content</custom-tag> and more text'
-      const html = markdownToHtml(markdown)
-      const backToMarkdown = htmlToMarkdown(html)
-
-      expect(html).toContain('Some text with <custom-tag>content</custom-tag> and more text')
-      expect(backToMarkdown).toBe('Some text with <custom-tag>content</custom-tag> and more text')
-    })
-
-    it('should preserve single custom XML tags', () => {
-      const markdown = '<abc>'
-      const html = markdownToHtml(markdown)
-      const backToMarkdown = htmlToMarkdown(html)
-
-      expect(html).toBe('<p><abc></p>')
-      expect(backToMarkdown).toBe('<abc>')
-    })
-
-    it('should preserve single custom XML tags in html', () => {
-      const html = '<p><abc></p>'
-      const markdown = htmlToMarkdown(html)
-      const backToHtml = markdownToHtml(markdown)
-
-      expect(markdown).toBe('<abc>')
-      expect(backToHtml).toBe('<p><abc></p>')
-    })
-
-    it('should preserve custom XML tags mixed with regular markdown', () => {
-      const markdown = '# Heading\n\n<custom-widget id="widget1">Widget content</custom-widget>\n\n**Bold text**'
-      const html = stripLineNumbers(markdownToHtml(markdown))
-      const backToMarkdown = htmlToMarkdown(html)
-
-      expect(html).toContain('<h1>Heading</h1>')
-      expect(html).toContain('<custom-widget id="widget1">Widget content</custom-widget>')
-      expect(html).toContain('<strong>Bold text</strong>')
-      expect(backToMarkdown).toContain('# Heading')
-      expect(backToMarkdown).toContain('<custom-widget id="widget1">Widget content</custom-widget>')
-      expect(backToMarkdown).toContain('**Bold text**')
-    })
-  })
-
-  describe('Typing behavior issues', () => {
-    it('should not add unwanted line breaks during simple text typing', () => {
-      const html = '<p>Hello world</p>'
-      const markdown = htmlToMarkdown(html)
-      const backToHtml = stripLineNumbers(markdownToHtml(markdown))
-
-      expect(markdown).toBe('Hello world')
-      expect(backToHtml).toBe('<p>Hello world</p>\n')
-    })
-
-    it('should preserve simple paragraph structure during round-trip conversion', () => {
-      const originalHtml = '<p>This is a simple paragraph being typed</p>'
-      const markdown = htmlToMarkdown(originalHtml)
-      const backToHtml = stripLineNumbers(markdownToHtml(markdown))
-      expect(markdown).toBe('This is a simple paragraph being typed')
-      expect(backToHtml).toBe('<p>This is a simple paragraph being typed</p>\n')
-    })
-  })
-
-  describe('should keep YAML front matter', () => {
-    it('should keep YAML front matter', () => {
-      const markdown = `---
-tags:
-  - 你好
-aliases:
-  - "1111"
-  - "222"
-  - "333"
-  - "3333"
-cssclasses:
-  - fffff
-  - ssss
-  - s12
----`
-      const result = markdownToHtml(markdown)
-      const backToMarkdown = htmlToMarkdown(result)
-      expect(backToMarkdown).toBe(markdown)
-    })
-  })
-
-  describe('should keep []', () => {
-    it('should keep [[foo]]', () => {
-      const markdown = `[[foo]]`
-      const result = markdownToHtml(markdown)
-      const backToMarkdown = htmlToMarkdown(result)
-      expect(backToMarkdown).toBe(markdown)
-    })
-    it('should keep []', () => {
-      const markdown = `[foo]`
-      const result = markdownToHtml(markdown)
-      const backToMarkdown = htmlToMarkdown(result)
-      expect(backToMarkdown).toBe(markdown)
-    })
-  })
-
-  describe('should have markdown line number injected in HTML', () => {
-    it('should inject line numbers into paragraphs', () => {
-      const markdown = 'First paragraph\n\nSecond paragraph\n\nThird paragraph'
-      const result = markdownToHtml(markdown)
-      expect(result).toContain(`<p ${MARKDOWN_SOURCE_LINE_ATTR}="1">First paragraph</p>`)
-      expect(result).toContain(`<p ${MARKDOWN_SOURCE_LINE_ATTR}="3">Second paragraph</p>`)
-      expect(result).toContain(`<p ${MARKDOWN_SOURCE_LINE_ATTR}="5">Third paragraph</p>`)
-    })
-
-    it('should inject line numbers into mixed content', () => {
-      const markdown = 'Text\n\n- List\n\n> Quote'
-      const result = markdownToHtml(markdown)
-      expect(result).toContain(`<p ${MARKDOWN_SOURCE_LINE_ATTR}="1">Text</p>`)
-      expect(result).toContain(`<ul ${MARKDOWN_SOURCE_LINE_ATTR}="3">`)
-      expect(result).toContain(`<li ${MARKDOWN_SOURCE_LINE_ATTR}="3">List</li>`)
-      expect(result).toContain(`<blockquote ${MARKDOWN_SOURCE_LINE_ATTR}="5">`)
-      expect(result).toContain(`<p ${MARKDOWN_SOURCE_LINE_ATTR}="5">Quote</p>`)
-    })
-  })
-})
diff --git a/src/renderer/src/utils/markdownConverter.ts b/src/renderer/src/utils/markdownConverter.ts
index 51d684612d..3ccfb1fb74 100644
--- a/src/renderer/src/utils/markdownConverter.ts
+++ b/src/renderer/src/utils/markdownConverter.ts
@@ -1,82 +1,11 @@
 import { loggerService } from '@logger'
 import { MARKDOWN_SOURCE_LINE_ATTR } from '@renderer/components/RichEditor/constants'
-import { TurndownPlugin } from '@truto/turndown-plugin-gfm'
 import he from 'he'
-import htmlTags, { type HtmlTags } from 'html-tags'
-import * as htmlparser2 from 'htmlparser2'
 import MarkdownIt from 'markdown-it'
-import striptags from 'striptags'
 import TurndownService from 'turndown'
 
 const logger = loggerService.withContext('markdownConverter')
 
-function escapeCustomTags(html: string) {
-  let result = ''
-  let currentPos = 0
-  const processedPositions = new Set<number>()
-
-  const parser = new htmlparser2.Parser({
-    onopentagname(tagname) {
-      const startPos = parser.startIndex
-      const endPos = parser.endIndex
-
-      // Add content before this tag
-      result += html.slice(currentPos, startPos)
-
-      if (!htmlTags.includes(tagname as HtmlTags)) {
-        // This is a custom tag, escape it
-        const tagHtml = html.slice(startPos, endPos + 1)
-        result += tagHtml.replace(/</g, '&lt;').replace(/>/g, '&gt;')
-      } else {
-        // This is a standard HTML tag, keep it as-is
-        result += html.slice(startPos, endPos + 1)
-      }
-
-      currentPos = endPos + 1
-    },
-
-    onclosetag(tagname) {
-      const startPos = parser.startIndex
-      const endPos = parser.endIndex
-
-      // Skip if we've already processed this position (handles malformed HTML)
-      if (processedPositions.has(endPos) || endPos + 1 <= currentPos) {
-        return
-      }
-
-      processedPositions.add(endPos)
-
-      // Get the actual HTML content at this position to verify what tag it really is
-      const actualTagHtml = html.slice(startPos, endPos + 1)
-      const actualTagMatch = actualTagHtml.match(/<\/([^>]+)>/)
-      const actualTagName = actualTagMatch ? actualTagMatch[1] : tagname
-
-      if (!htmlTags.includes(actualTagName as HtmlTags)) {
-        // This is a custom tag, escape it
-        result += html.slice(currentPos, startPos)
-        result += actualTagHtml.replace(/</g, '&lt;').replace(/>/g, '&gt;')
-        currentPos = endPos + 1
-      } else {
-        // This is a standard HTML tag, add content up to and including the closing tag
-        result += html.slice(currentPos, endPos + 1)
-        currentPos = endPos + 1
-      }
-    },
-
-    onend() {
-      result += html.slice(currentPos)
-    }
-  })
-
-  parser.write(html)
-  parser.end()
-  return result
-}
-
-export interface TaskListOptions {
-  label?: boolean
-}
-
 // Create markdown-it instance with task list plugin
 const md = new MarkdownIt({
   html: true, // Enable HTML tags in source
@@ -154,105 +83,6 @@ md.renderer.rules.fence = function (tokens, idx) {
   return html
 }
 
-// Custom task list plugin for markdown-it
-function taskListPlugin(md: MarkdownIt, options: TaskListOptions = {}) {
-  const { label = false } = options
-  md.core.ruler.after('inline', 'task_list', (state) => {
-    const tokens = state.tokens
-    let inside_task_list = false
-
-    for (let i = 0; i < tokens.length; i++) {
-      const token = tokens[i]
-
-      if (token.type === 'bullet_list_open') {
-        // Check if this list contains task items
-        let hasTaskItems = false
-        for (let j = i + 1; j < tokens.length && tokens[j].type !== 'bullet_list_close'; j++) {
-          if (tokens[j].type === 'inline' && /^\s*\[[ x]\](\s|$)/.test(tokens[j].content)) {
-            hasTaskItems = true
-            break
-          }
-        }
-
-        if (hasTaskItems) {
-          inside_task_list = true
-          token.attrSet('data-type', 'taskList')
-          token.attrSet('class', 'task-list')
-        }
-      } else if (token.type === 'bullet_list_close' && inside_task_list) {
-        inside_task_list = false
-      } else if (token.type === 'list_item_open' && inside_task_list) {
-        token.attrSet('data-type', 'taskItem')
-        token.attrSet('class', 'task-list-item')
-      } else if (token.type === 'inline' && inside_task_list) {
-        const match = token.content.match(/^(\s*)\[([x ])\](\s+(.*))?$/)
-        if (match) {
-          const [, , check, , content] = match
-          const isChecked = check.toLowerCase() === 'x'
-
-          // Find the parent list item token
-          for (let j = i - 1; j >= 0; j--) {
-            if (tokens[j].type === 'list_item_open') {
-              tokens[j].attrSet('data-checked', isChecked.toString())
-              break
-            }
-          }
-
-          // Find the parent paragraph token and replace it entirely
-          let paragraphTokenIndex = -1
-          for (let k = i - 1; k >= 0; k--) {
-            if (tokens[k].type === 'paragraph_open') {
-              paragraphTokenIndex = k
-              break
-            }
-          }
-
-          // Check if this came from HTML with <div><p> structure
-          // Empty content typically indicates it came from <div><p></p></div> structure
-          const shouldUseDivFormat = token.content === '' || state.src.includes('<!-- div-format -->')
-
-          if (paragraphTokenIndex >= 0 && label && shouldUseDivFormat) {
-            // Replace the entire paragraph structure with raw HTML for div format
-            const htmlToken = new state.Token('html_inline', '', 0)
-            if (content) {
-              htmlToken.content = `<label><input type="checkbox"${isChecked ? ' checked' : ''} disabled></label><div><p>${content}</p></div>`
-            } else {
-              htmlToken.content = `<label><input type="checkbox"${isChecked ? ' checked' : ''} disabled></label><div><p></p></div>`
-            }
-
-            // Remove the paragraph tokens and replace with our HTML token
-            tokens.splice(paragraphTokenIndex, 3, htmlToken) // Remove paragraph_open, inline, paragraph_close
-            i = paragraphTokenIndex // Adjust index after splice
-          } else {
-            // Use the standard label format
-            token.content = content || ''
-            const checkboxToken = new state.Token('html_inline', '', 0)
-
-            if (label) {
-              if (content) {
-                checkboxToken.content = `<label><input type="checkbox"${isChecked ? ' checked' : ''} disabled> ${content}</label>`
-              } else {
-                checkboxToken.content = `<label><input type="checkbox"${isChecked ? ' checked' : ''} disabled></label>`
-              }
-              token.children = [checkboxToken]
-            } else {
-              checkboxToken.content = `<input type="checkbox"${isChecked ? ' checked' : ''} disabled>`
-
-              if (content) {
-                const textToken = new state.Token('text', '', 0)
-                textToken.content = ' ' + content
-                token.children = [checkboxToken, textToken]
-              } else {
-                token.children = [checkboxToken]
-              }
-            }
-          }
-        }
-      }
-    }
-  })
-}
-
 interface TokenLike {
   content: string
   block?: boolean
@@ -361,159 +191,8 @@ function yamlFrontMatterPlugin(md: MarkdownIt) {
   }
 }
 
-function tipTapKatexPlugin(md: MarkdownIt) {
-  // 1) Parser: recognize $$ ... $$ as a block math token
-  md.block.ruler.before(
-    'fence',
-    'math_block',
-    (stateLike: unknown, startLine: number, endLine: number, silent: boolean): boolean => {
-      const state = stateLike as BlockStateLike
-
-      const startPos = state.bMarks[startLine] + state.tShift[startLine]
-      const maxPos = state.eMarks[startLine]
-
-      // Must begin with $$ at line start (after indentation)
-      if (startPos + 2 > maxPos) return false
-      if (state.src.charCodeAt(startPos) !== 0x24 /* $ */ || state.src.charCodeAt(startPos + 1) !== 0x24 /* $ */) {
-        return false
-      }
-
-      // If requested only to validate existence
-      if (silent) return true
-
-      // Search for closing $$
-      let nextLine = startLine
-      let content = ''
-
-      // Same-line closing? $$ ... $$
-      const sameLineClose = state.src.indexOf('$$', startPos + 2)
-      if (sameLineClose !== -1 && sameLineClose <= maxPos - 2) {
-        content = state.src.slice(startPos + 2, sameLineClose).trim()
-        nextLine = startLine
-      } else {
-        // Multiline: look for closing $$ anywhere
-        for (nextLine = startLine + 1; nextLine < endLine; nextLine++) {
-          const lineStart = state.bMarks[nextLine] + state.tShift[nextLine]
-          const lineEnd = state.eMarks[nextLine]
-          const line = state.src.slice(lineStart, lineEnd)
-
-          // Check if this line contains closing $$
-          const closingPos = line.indexOf('$$')
-          if (closingPos !== -1) {
-            // Found closing $$; extract content between opening and closing
-            const allLines: string[] = []
-
-            // First line: content after opening $$
-            const firstLineStart = state.bMarks[startLine] + state.tShift[startLine] + 2
-            const firstLineEnd = state.eMarks[startLine]
-            const firstLineContent = state.src.slice(firstLineStart, firstLineEnd)
-            if (firstLineContent.trim()) {
-              allLines.push(firstLineContent)
-            }
-
-            // Middle lines: full content
-            for (let lineIdx = startLine + 1; lineIdx < nextLine; lineIdx++) {
-              const midLineStart = state.bMarks[lineIdx] + state.tShift[lineIdx]
-              const midLineEnd = state.eMarks[lineIdx]
-              allLines.push(state.src.slice(midLineStart, midLineEnd))
-            }
-
-            // Last line: content before closing $$
-            const lastLineContent = line.slice(0, closingPos)
-            if (lastLineContent.trim()) {
-              allLines.push(lastLineContent)
-            }
-
-            content = allLines.join('\n').trim()
-            break
-          }
-
-          // Check if line starts with $$ (alternative closing pattern)
-          if (
-            lineStart + 2 <= lineEnd &&
-            state.src.charCodeAt(lineStart) === 0x24 &&
-            state.src.charCodeAt(lineStart + 1) === 0x24
-          ) {
-            // Extract content between start and this line
-            const firstContentLineStart = state.bMarks[startLine] + state.tShift[startLine] + 2
-            const lastContentLineEnd = state.bMarks[nextLine]
-            content = state.src.slice(firstContentLineStart, lastContentLineEnd).trim()
-            break
-          }
-        }
-        if (nextLine >= endLine) {
-          // No closing fence -> not a valid block
-          return false
-        }
-      }
-
-      const token = state.push('math_block', 'div', 0)
-      token.block = true
-      token.map = [startLine, nextLine]
-      token.content = content
-
-      state.line = nextLine + 1
-      return true
-    }
-  )
-
-  // 2) Renderer: output TipTap-friendly container
-  md.renderer.rules.math_block = (tokens: Array<{ content?: string }>, idx: number): string => {
-    const token = tokens[idx]
-    const content = token?.content ?? ''
-    const latexEscaped = he.encode(content, { useNamedReferences: true })
-    let html = `<div data-latex="${latexEscaped}" data-type="block-math"></div>`
-    html = injectLineNumber(token, html)
-    return html
-  }
-
-  // 3) Inline parser: recognize $...$ on a single line as inline math
-  md.inline.ruler.before('emphasis', 'math_inline', (stateLike: unknown, silent: boolean): boolean => {
-    const state = stateLike as InlineStateLike
-    const start = state.pos
-
-    // Need starting $
-    if (start >= state.posMax || state.src.charCodeAt(start) !== 0x24 /* $ */) {
-      return false
-    }
-
-    // Find the next $ after start+1
-    const close = state.src.indexOf('$', start + 1)
-    if (close === -1 || close > state.posMax) {
-      return false
-    }
-
-    const content = state.src.slice(start + 1, close)
-    // Inline variant must not contain a newline
-    if (content.indexOf('\n') !== -1) {
-      return false
-    }
-
-    if (!silent) {
-      const token = state.push('math_inline', 'span', 0)
-      token.content = content.trim()
-    }
-
-    state.pos = close + 1
-    return true
-  })
-
-  // 4) Inline renderer: output TipTap-friendly inline container
-  md.renderer.rules.math_inline = (tokens: Array<{ content?: string }>, idx: number): string => {
-    const content = tokens[idx]?.content ?? ''
-    const latexEscaped = he.encode(content, { useNamedReferences: true })
-    return `<span data-latex="${latexEscaped}" data-type="inline-math"></span>`
-  }
-}
-
 md.use(yamlFrontMatterPlugin)
 
-md.use(taskListPlugin, {
-  label: true
-})
-
-md.use(tipTapKatexPlugin)
-
 // Initialize turndown service
 const turndownService = new TurndownService({
   headingStyle: 'atx', // Use # for headings
@@ -522,56 +201,7 @@ const turndownService = new TurndownService({
   codeBlockStyle: 'fenced', // Use ``` for code blocks
   fence: '```', // Use ``` for code blocks
   emDelimiter: '*', // Use * for emphasis
-  strongDelimiter: '**', // Use ** for strong
-  blankReplacement: (_content, node) => {
-    const el = node as any as HTMLElement
-    if (el.nodeName === 'DIV' && el.getAttribute?.('data-type') === 'block-math') {
-      const latex = el.getAttribute?.('data-latex') || ''
-      const decodedLatex = he.decode(latex, {
-        isAttributeValue: false,
-        strict: false
-      })
-      return `$$${decodedLatex}$$\n\n`
-    }
-    if (el.nodeName === 'SPAN' && el.getAttribute?.('data-type') === 'inline-math') {
-      const latex = el.getAttribute?.('data-latex') || ''
-      const decodedLatex = he.decode(latex, {
-        isAttributeValue: false,
-        strict: false
-      })
-      return `$${decodedLatex}$`
-    }
-    // Handle paragraphs containing only math spans
-    if (el.nodeName === 'P' && el.querySelector?.('[data-type="inline-math"]')) {
-      const mathSpans = el.querySelectorAll('[data-type="inline-math"]')
-      if (mathSpans.length === 1 && el.children.length === 1) {
-        const span = mathSpans[0]
-        const latex = span.getAttribute('data-latex') || ''
-        const decodedLatex = he.decode(latex, {
-          isAttributeValue: false,
-          strict: false
-        })
-        return `$${decodedLatex}$`
-      }
-    }
-    return (node as any).isBlock ? '\n\n' : ''
-  }
-})
-
-turndownService.addRule('strikethrough', {
-  filter: ['del', 's'],
-  replacement: (content) => `~~${content}~~`
-})
-
-turndownService.addRule('underline', {
-  filter: ['u'],
-  replacement: (content) => `<u>${content}</u>`
-})
-
-// Custom rule to preserve <br> tags as literal text
-turndownService.addRule('br', {
-  filter: 'br',
-  replacement: () => '<br>'
+  strongDelimiter: '**' // Use ** for strong
 })
 
 // Custom rule to preserve YAML front matter
@@ -596,321 +226,6 @@ turndownService.addRule('yamlFrontMatter', {
   }
 })
 
-// Helper function to safely get text content and clean it with LaTeX support
-function cleanCellContent(content: string, cellElement?: Element): string {
-  // First check for math elements in the cell
-  if (cellElement) {
-    const blockMath = cellElement.querySelector('[data-type="block-math"]')
-    if (blockMath) {
-      const latex = blockMath.getAttribute('data-latex') || ''
-      const decodedLatex = he.decode(latex, { isAttributeValue: false, strict: false })
-      return `$$${decodedLatex}$$`
-    }
-
-    const inlineMath = cellElement.querySelector('[data-type="inline-math"]')
-    if (inlineMath) {
-      const latex = inlineMath.getAttribute('data-latex') || ''
-      const decodedLatex = he.decode(latex, { isAttributeValue: false, strict: false })
-      return `$${decodedLatex}$`
-    }
-  }
-
-  if (!content) return '   ' // Default empty cell content
-
-  // Clean and normalize content
-  let cleaned = content
-    .trim()
-    .replace(/\s+/g, ' ') // Normalize whitespace
-    .replace(/\|/g, '\\|') // Escape pipes
-    .replace(/\n+/g, ' ') // Convert newlines to spaces
-    .replace(/\r+/g, ' ') // Convert carriage returns to spaces
-
-  // If content is still empty or only whitespace, provide default
-  if (!cleaned || cleaned.match(/^\s*$/)) {
-    return '   '
-  }
-
-  // Ensure minimum width for table readability
-  if (cleaned.length < 3) {
-    cleaned += ' '.repeat(3 - cleaned.length)
-  }
-
-  return cleaned
-}
-
-// Enhanced cell replacement with LaTeX support
-function cellWithLatex(content: string, node: Element, index?: number | null): string {
-  if (index === null && node && node.parentNode) {
-    index = Array.prototype.indexOf.call(node.parentNode.childNodes, node)
-  }
-  if (index === null) index = 0
-
-  let prefix = ' '
-  if (index === 0) prefix = '| '
-
-  const cellContent = cleanCellContent(content, node)
-
-  // Handle colspan by adding extra empty cells
-  let colspan = 1
-  if (node && node.getAttribute) {
-    colspan = parseInt(node.getAttribute('colspan') || '1', 10)
-    if (isNaN(colspan) || colspan < 1) colspan = 1
-  }
-
-  let result = prefix + cellContent + ' |'
-
-  // Add empty cells for colspan
-  for (let i = 1; i < colspan; i++) {
-    result += '   |'
-  }
-
-  return result
-}
-
-const customTablesPlugin: TurndownPlugin = (turndownService) => {
-  turndownService.addRule('tableCell', {
-    filter: ['th', 'td'],
-    replacement: function (content: string, node: Element) {
-      return cellWithLatex(content, node, null)
-    }
-  })
-
-  turndownService.addRule('tableRow', {
-    filter: 'tr',
-    replacement: function (content: string, node: Element) {
-      // Skip empty rows
-      if (!content || !content.trim()) return ''
-
-      let borderCells = ''
-
-      // Add separator row for heading (simplified version)
-      const parentNode = node.parentNode
-      if (parentNode && parentNode.nodeName === 'THEAD') {
-        const table = node.closest('table')
-        if (table) {
-          // Count cells in this row
-          const cellNodes = Array.from(node.querySelectorAll('th, td'))
-          const colCount = cellNodes.length
-
-          if (colCount > 0) {
-            for (let i = 0; i < colCount; i++) {
-              const prefix = i === 0 ? '| ' : ' '
-              borderCells += prefix + '---' + ' |'
-            }
-          }
-        }
-      }
-
-      return '\n' + content + (borderCells ? '\n' + borderCells : '')
-    }
-  })
-
-  turndownService.addRule('table', {
-    filter: 'table',
-    replacement: function (content: string) {
-      // Clean up content (remove extra newlines)
-      content = content.replace(/\n+/g, '\n').trim()
-
-      // If no content after cleaning, return empty
-      if (!content) return ''
-
-      // Split into lines and filter out empty lines
-      const lines = content.split('\n').filter((line) => line.trim())
-
-      if (lines.length === 0) return ''
-
-      // Check if we need to add a header row
-      const hasHeaderSeparator = lines.length >= 2 && /\|\s*-+/.test(lines[1])
-
-      let result = lines.join('\n')
-
-      // If no header separator exists, add a simple one
-      if (!hasHeaderSeparator && lines.length >= 1) {
-        const firstLine = lines[0]
-        const colCount = (firstLine.match(/\|/g) || []).length - 1
-
-        if (colCount > 0) {
-          let separator = '|'
-          for (let i = 0; i < colCount; i++) {
-            separator += ' --- |'
-          }
-
-          // Insert separator after first line
-          const resultLines = [lines[0], separator, ...lines.slice(1)]
-          result = resultLines.join('\n')
-        }
-      }
-
-      return '\n\n' + result + '\n\n'
-    }
-  })
-
-  // Remove table sections but keep content
-  turndownService.addRule('tableSection', {
-    filter: ['thead', 'tbody', 'tfoot'],
-    replacement: function (content: string) {
-      return content
-    }
-  })
-}
-
-const taskListItemsPlugin: TurndownPlugin = (turndownService) => {
-  turndownService.addRule('taskListItems', {
-    filter: (node: Element) => {
-      return node.nodeName === 'LI' && node.getAttribute && node.getAttribute('data-type') === 'taskItem'
-    },
-    replacement: (_content: string, node: Element) => {
-      const checkbox = node.querySelector('input[type="checkbox"]') as HTMLInputElement | null
-      const isChecked = checkbox?.checked || node.getAttribute('data-checked') === 'true'
-
-      // Check if this task item uses the div format
-      const hasDiv = node.querySelector('div p') !== null
-      const divContent = node.querySelector('div p')?.textContent?.trim() || ''
-
-      let textContent = ''
-      if (hasDiv) {
-        textContent = divContent
-        // Add a marker to indicate this came from div format
-        const marker = '<!-- div-format -->'
-        return '- ' + (isChecked ? '[x]' : '[ ]') + ' ' + textContent + ' ' + marker + '\n\n'
-      } else {
-        textContent = node.textContent?.trim() || ''
-        return '- ' + (isChecked ? '[x]' : '[ ]') + ' ' + textContent + '\n\n'
-      }
-    }
-  })
-  turndownService.addRule('taskList', {
-    filter: (node: Element) => {
-      return node.nodeName === 'UL' && node.getAttribute && node.getAttribute('data-type') === 'taskList'
-    },
-    replacement: (content: string) => {
-      return content
-    }
-  })
-}
-
-turndownService.use([customTablesPlugin, taskListItemsPlugin])
-
-/**
- * Converts HTML content to Markdown
- * @param html - HTML string to convert
- * @returns Markdown string
- */
-export const htmlToMarkdown = (html: string | null | undefined): string => {
-  if (!html || typeof html !== 'string') {
-    return ''
-  }
-
-  try {
-    const encodedHtml = escapeCustomTags(html)
-    const turndownResult = turndownService.turndown(encodedHtml)
-    let finalResult = he.decode(turndownResult)
-
-    // Post-process to unescape square brackets that are not part of Markdown link syntax
-    // This preserves wiki-style double brackets [[foo]] and single brackets [foo]
-    // but keeps proper Markdown links [text](url) intact
-
-    // Use a more sophisticated approach: check for the link pattern first,
-    // then unescape standalone brackets
-
-    // First, protect actual Markdown links by temporarily replacing them
-    const linkPlaceholders: string[] = []
-    let linkCounter = 0
-
-    // Find and replace all Markdown links with placeholders
-    finalResult = finalResult.replace(/\\\[([^\]]*)\\\]\([^)]*\)/g, (match) => {
-      const placeholder = `__MDLINK_${linkCounter++}__`
-      linkPlaceholders[linkCounter - 1] = match
-      return placeholder
-    })
-
-    // Now unescape all remaining square brackets
-    finalResult = finalResult.replace(/\\\[/g, '[').replace(/\\\]/g, ']')
-
-    // Restore the Markdown links
-    for (let i = 0; i < linkPlaceholders.length; i++) {
-      const placeholder = `__MDLINK_${i}__`
-      finalResult = finalResult.replace(placeholder, linkPlaceholders[i])
-    }
-
-    return finalResult
-  } catch (error) {
-    logger.error('Error converting HTML to Markdown:', error as Error)
-    return ''
-  }
-}
-
-/**
- * Converts Markdown content to HTML
- * @param markdown - Markdown string to convert
- * @param options - Task list options
- * @returns HTML string
- */
-export const markdownToHtml = (markdown: string | null | undefined): string => {
-  if (!markdown || typeof markdown !== 'string') {
-    return ''
-  }
-
-  try {
-    // First, convert any standalone markdown images to HTML img tags
-    // This handles cases where markdown images should be rendered as HTML instead of going through markdown-it
-    const processedMarkdown = markdown.replace(
-      /!\[([^\]]*)\]\(([^)]+?)(?:\s+"([^"]*)")?\)/g,
-      (match, alt, src, title) => {
-        // Only convert file:// protocol images to HTML img tags
-        if (src.startsWith('file://')) {
-          const altText = alt || ''
-          const srcUrl = src.trim()
-          const titleAttr = title ? ` title="${title}"` : ''
-          return `<img src="${srcUrl}" alt="${altText}"${titleAttr} />`
-        }
-        return match
-      }
-    )
-
-    let html = md.render(processedMarkdown)
-    const trimmedMarkdown = processedMarkdown.trim()
-
-    if (html.trim() === trimmedMarkdown) {
-      const singleTagMatch = trimmedMarkdown.match(/^<([a-zA-Z][^>\s]*)\/?>$/)
-      if (singleTagMatch) {
-        const tagName = singleTagMatch[1]
-        if (!htmlTags.includes(tagName.toLowerCase() as any)) {
-          html = `<p>${html}</p>`
-        }
-      }
-    }
-
-    // Normalize task list HTML to match expected format
-    if (html.includes('data-type="taskList"') && html.includes('data-type="taskItem"')) {
-      // Clean up any div-format markers that leaked through
-      html = html.replace(/\s*<!-- div-format -->\s*/g, '')
-
-      // Handle both empty and non-empty task items with <div><p>content</p></div> structure
-      if (html.includes('<div><p>') && html.includes('</p></div>')) {
-        // Both tests use the div format now, but with different formatting expectations
-        // conversion2 has multiple items and expects expanded format
-        // original conversion has single item and expects compact format
-        const hasMultipleItems = (html.match(/<li[^>]*data-type="taskItem"/g) || []).length > 1
-
-        if (hasMultipleItems) {
-          // This is conversion2 format with multiple items - add proper newlines
-          html = html.replace(/(<\/div>)<\/li>/g, '$1\n</li>')
-        } else {
-          // This is the original conversion format - compact inside li tags but keep list structure
-          // Keep newlines around list items but compact content within li tags
-          html = html.replace(/(<li[^>]*>)\s+/g, '$1').replace(/\s+(<\/li>)/g, '$1')
-        }
-      }
-    }
-
-    return html
-  } catch (error) {
-    logger.error('Error converting Markdown to HTML:', error as Error)
-    return ''
-  }
-}
-
 /**
  * Gets plain text preview from Markdown content
  * @param markdown - Markdown string
@@ -919,11 +234,7 @@ export const markdownToHtml = (markdown: string | null | undefined): string => {
  */
 export const markdownToPreviewText = (markdown: string, maxLength: number = 50): string => {
   if (!markdown) return ''
-
-  // Convert to HTML first, then strip tags
-  const html = markdownToHtml(markdown)
-  const textContent = he.decode(striptags(html)).replace(/\s+/g, ' ').trim()
-
+  const textContent = turndownService.turndown(markdown).replace(/\s+/g, ' ').trim()
   return textContent.length > maxLength ? `${textContent.slice(0, maxLength)}...` : textContent
 }
 
diff --git a/yarn.lock b/yarn.lock
index 672c4af35f..83bd2e58c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2664,8 +2664,8 @@ __metadata:
   resolution: "@cherrystudio/extension-table-plus@workspace:packages/extension-table-plus"
   dependencies:
     "@biomejs/biome": "npm:2.2.4"
-    "@tiptap/core": "npm:^3.2.0"
-    "@tiptap/pm": "npm:^3.2.0"
+    "@tiptap/core": "npm:^3.7.2"
+    "@tiptap/pm": "npm:^3.7.2"
     eslint: "npm:^9.22.0"
     eslint-plugin-react-hooks: "npm:^5.2.0"
     eslint-plugin-simple-import-sort: "npm:^12.1.1"
@@ -11516,363 +11516,360 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@tiptap/core@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/core@npm:3.2.0"
+"@tiptap/core@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/core@npm:3.7.2"
   peerDependencies:
-    "@tiptap/pm": ^3.2.0
-  checksum: 10c0/8f10d6dc9cc65f9bbec49a8643740819e73587d247782239dd02d386650e483f4bc221f883395c50be8c0b049a25f6138c8dd09ec205908e3bf2841d51533fd7
+    "@tiptap/pm": ^3.7.2
+  checksum: 10c0/53545b8117e3e68333a3d426b799c970689c02d8fa0749ccd1bff1b86ba8d2f1fdb6cfcfe3f232bf46341c46ffd4abfade554db472e08e7d0a51c3a15ae8f06d
   languageName: node
   linkType: hard
 
-"@tiptap/extension-blockquote@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-blockquote@npm:3.2.0"
+"@tiptap/extension-blockquote@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-blockquote@npm:3.7.2"
   peerDependencies:
-    "@tiptap/core": ^3.2.0
-  checksum: 10c0/53d652ef56d688401e2691a1ef40a1ec8585d691baab8ba62800cfe12d32c0509ede887417dd38bef6e42c32a69172fcae88c50a510bc3afce08e4a5730a717d
+    "@tiptap/core": ^3.7.2
+  checksum: 10c0/44bd70fea40fd1a925f1a7302c45bd25ffeeb5ad5efa44b7bf56c149e1a8d380df13f2d4e16482ba950e4e91dfe34a80d063f7086ab0ae6582da1a6c2bc99c6d
   languageName: node
   linkType: hard
 
-"@tiptap/extension-bold@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-bold@npm:3.2.0"
+"@tiptap/extension-bold@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-bold@npm:3.7.2"
   peerDependencies:
-    "@tiptap/core": ^3.2.0
-  checksum: 10c0/233569d10be16cc89b4480d6385b7c7cd114d9b9427cf2493915082a779779b01c9ece5ece38965082c9eede5516da8a460bbfea7f5e16aa55e1b54fbfc95b5c
+    "@tiptap/core": ^3.7.2
+  checksum: 10c0/2c97a1fcc9e54a6ac1c5a5be44467288cf77b8ca7c1b596b1c9e5901e26b05c05b16ce50fd7f76d5e664f2c3fecd3ef54699727baabdfc1f2a4e26408fafb114
   languageName: node
   linkType: hard
 
-"@tiptap/extension-bubble-menu@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-bubble-menu@npm:3.2.0"
+"@tiptap/extension-bubble-menu@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-bubble-menu@npm:3.7.2"
   dependencies:
     "@floating-ui/dom": "npm:^1.0.0"
   peerDependencies:
-    "@tiptap/core": ^3.2.0
-    "@tiptap/pm": ^3.2.0
-  checksum: 10c0/42e17d8a4c192219ff9315595e0cfa39909de6812cd76a453151bb7ec4d0267eccf98b2ee346ce890a9ae4b83d0255b7b72d3fb48c5edbd4c33280f098e60e51
+    "@tiptap/core": ^3.7.2
+    "@tiptap/pm": ^3.7.2
+  checksum: 10c0/91442f2db3124127eb7123d73d437c15cd5e594916bab69204f618e20d65bd4a8ecc9453065106adde4f6d28c47994c9aa82b5d0896470503f357731ae056ad0
   languageName: node
   linkType: hard
 
-"@tiptap/extension-bullet-list@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-bullet-list@npm:3.2.0"
+"@tiptap/extension-bullet-list@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-bullet-list@npm:3.7.2"
   peerDependencies:
-    "@tiptap/extension-list": ^3.2.0
-  checksum: 10c0/46f5d753585e2c3385fbfc691f992250be76534aec1c9cb6f4af1fde17ce4a373d2cffe50072a45cb90360236733316898df24feb23ac5e1bffe42ad3f55d1d2
+    "@tiptap/extension-list": ^3.7.2
+  checksum: 10c0/c1564f2898938a9a3c0d971ba00abcdb550b8e19a2c479903ae688c7097fed878ce3d2ab1187fd82fd486ea619d61c6a6035b6a8662d1031763d78250556f8a1
   languageName: node
   linkType: hard
 
-"@tiptap/extension-code-block@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-code-block@npm:3.2.0"
+"@tiptap/extension-code-block@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-code-block@npm:3.7.2"
   peerDependencies:
-    "@tiptap/core": ^3.2.0
-    "@tiptap/pm": ^3.2.0
-  checksum: 10c0/26bd0867b3af8f59670dbc253ba5b41d1ef8bb31e4ed94c6e6dfe8ca9d0a9f52388191c33432f29c633e261dd8001fd9c3eb4aed0c57dc233008b246766fe448
+    "@tiptap/core": ^3.7.2
+    "@tiptap/pm": ^3.7.2
+  checksum: 10c0/170e74d0e2f7f4e50fae4083255c86bf5824daf5734f2f99bc09f4f67038ef0405a91210b412c74ee07edd606cda60241ac1808eb8c9b954e050af55b7972fbb
   languageName: node
   linkType: hard
 
-"@tiptap/extension-code@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-code@npm:3.2.0"
+"@tiptap/extension-code@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-code@npm:3.7.2"
   peerDependencies:
-    "@tiptap/core": ^3.2.0
-  checksum: 10c0/97c7d8f7d4081d9e26c86543d5152d2d014c7bf37edc2e150ba1c17cda5265a2e4d714b9bebe935cf2164b8c932393a39b8664205c9bc0106e185d8cb7c97f12
+    "@tiptap/core": ^3.7.2
+  checksum: 10c0/4452d0a3bd787307b071946aec09085864c4f291e362bae175c339aa7d5cc99d2cc15bfa58552d3da3d812e0e56dba2c9bdd0a0e2327f8ab35f744dbde623eb8
   languageName: node
   linkType: hard
 
-"@tiptap/extension-collaboration@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-collaboration@npm:3.2.0"
+"@tiptap/extension-collaboration@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-collaboration@npm:3.7.2"
   peerDependencies:
-    "@tiptap/core": ^3.2.0
-    "@tiptap/pm": ^3.2.0
+    "@tiptap/core": ^3.7.2
+    "@tiptap/pm": ^3.7.2
     "@tiptap/y-tiptap": ^3.0.0-beta.3
     yjs: ^13
-  checksum: 10c0/ebc50b11c32f14aba648327fd0d7d0394d1bd5a164a05399b22683bab2f814b2d63efa3d38d11234b5cd801b3533ec5f15b0ef655954b571290daec62b4e8cab
+  checksum: 10c0/a8771a9c31b85344caf2d73396b8377e88d875d05dfc2acb128bc0cba377ee26d53b181cbd4802bdafb06ec8b3762cedca3b71c811030ce59ab479c53f51eb03
   languageName: node
   linkType: hard
 
-"@tiptap/extension-document@npm:^3.2.0":
-  version: 3.2.0
-  resolution: "@tiptap/extension-document@npm:3.2.0"
+"@tiptap/extension-document@npm:^3.7.2":
+  version: 3.7.2
+  resolution: "@tiptap/extension-document@npm:3.7.2"
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