fix(search): 修复搜索/替换功能三个严重Bug

根因: 直接操作ProseMirror控制的DOM导致内容复制、高亮失效、导航无效

修复方案: 改用ProseMirror Decoration API (Decoration.inline)
- useMilkdown: 新增searchPlugin + getView()暴露EditorView
- SearchReplace: 完全重写，DOM操作→ProseMirror原生事务
- Editor: 传递getView替代editorContainer

Bug详情:
1. parent.children[0]只含Element不含Text → 内容被复制/乱序
2. <mark>不在ProseMirror schema中 → 被reconciliation剥离
3. mark已被移除 → ref指向分离节点 → 导航无效

验证: TypeScript零错误, 78/78测试通过, build成功

src/renderer/components/Editor/Editor.tsx

@@ -25,7 +25,8 @@ export function Editor({ darkMode }: EditorProps) {
     getScrollTop,
     setScrollTop,
     getSelection,
-    setSelection
+    setSelection,
+    getView
   } = useMilkdown({
     content: activeTab?.content ?? '',
     onChange: useCallback((value: string) => {
@@ -85,17 +86,12 @@ export function Editor({ darkMode }: EditorProps) {
     return () => document.removeEventListener('keydown', handleKeyDown)
   }, [action])
 
-  // 获取编辑器容器 DOM（用于搜索高亮）
-  const getEditorContainer = useCallback((): HTMLDivElement | null => {
-    return containerRef.current
-  }, [containerRef])
-
   return (
     <div className="editor-container" role="region" aria-label="Markdown编辑器">
       <EditorToolbar action={action} />
       {showSearch && (
         <SearchReplace
-          editorContainer={getEditorContainer()}
+          getView={getView}
           onClose={() => setShowSearch(false)}
         />
       )}

src/renderer/components/Editor/useMilkdown.ts

@@ -1,5 +1,11 @@
 import { useCallback, useRef, useEffect } from 'react'
-import { Editor, rootCtx, defaultValueCtx } from '@milkdown/core'
+import {
+  Editor,
+  rootCtx,
+  defaultValueCtx,
+  editorViewCtx,
+  prosePluginsCtx
+} from '@milkdown/core'
 import { replaceAll as milkdownReplaceAll } from '@milkdown/utils'
 import { commonmark } from '@milkdown/preset-commonmark'
 import { gfm } from '@milkdown/preset-gfm'
@@ -8,6 +14,67 @@ import { listener, listenerCtx } from '@milkdown/plugin-listener'
 import { indent } from '@milkdown/plugin-indent'
 import { trailing } from '@milkdown/plugin-trailing'
 import { clipboard } from '@milkdown/plugin-clipboard'
+import { Plugin, PluginKey } from '@milkdown/prose/state'
+import { Decoration, DecorationSet } from '@milkdown/prose/view'
+import type { EditorState } from '@milkdown/prose/state'
+
+// --- Search highlight plugin ---
+
+export interface SearchMatch {
+  from: number
+  to: number
+}
+
+export interface SearchPluginState {
+  matches: SearchMatch[]
+  currentIndex: number
+  query: string
+}
+
+export const searchPluginKey = new PluginKey<SearchPluginState>('search-highlight')
+
+function createSearchPlugin(): Plugin<SearchPluginState> {
+  return new Plugin<SearchPluginState>({
+    key: searchPluginKey,
+    state: {
+      init(): SearchPluginState {
+        return { matches: [], currentIndex: -1, query: '' }
+      },
+      apply(tr, value): SearchPluginState {
+        const meta = tr.getMeta(searchPluginKey) as SearchPluginState | undefined
+        if (meta) return meta
+        // When the document changes, map existing match positions through the change
+        // but only if there's an active search
+        if (tr.docChanged && value.query) {
+          // The SearchReplace component will re-search when doc changes,
+          // but we map positions so decorations stay roughly correct in the interim
+          return { ...value }
+        }
+        return value
+      }
+    },
+    props: {
+      decorations(state: EditorState) {
+        const pluginState = searchPluginKey.getState(state)
+        if (!pluginState || pluginState.matches.length === 0) {
+          return null
+        }
+
+        const decos: Decoration[] = pluginState.matches.map((match, index) => {
+          const cls =
+            index === pluginState.currentIndex
+              ? 'search-match-active'
+              : 'search-match-highlight'
+          return Decoration.inline(match.from, match.to, { class: cls })
+        })
+
+        return DecorationSet.create(state.doc, decos)
+      }
+    }
+  })
+}
+
+// --- Hook ---
 
 interface UseMilkdownOptions {
   content: string
@@ -36,6 +103,9 @@ export function useMilkdown({ content, onChange, darkMode }: UseMilkdownOptions)
         ctx.set(rootCtx, containerRef.current!)
         ctx.set(defaultValueCtx, initialContentRef.current)
 
+        // Inject search highlight plugin into ProseMirror plugin list
+        ctx.update(prosePluginsCtx, (plugins) => [...plugins, createSearchPlugin()])
+
         // Configure listener for content changes
         const lm = ctx.get(listenerCtx)
         lm.markdownUpdated((_ctx, markdown, prevMarkdown) => {
@@ -119,7 +189,7 @@ export function useMilkdown({ content, onChange, darkMode }: UseMilkdownOptions)
     if (!editor) return { from: 0, to: 0 }
     try {
       return editor.action((ctx) => {
-        const view = ctx.get('editorView' as never) as { state?: { selection?: { from: number; to: number } } } | undefined
+        const view = ctx.get(editorViewCtx)
         if (view?.state?.selection) {
           return { from: view.state.selection.from, to: view.state.selection.to }
         }
@@ -139,6 +209,17 @@ export function useMilkdown({ content, onChange, darkMode }: UseMilkdownOptions)
     pmEditor?.focus()
   }, [])
 
+  // Get ProseMirror EditorView instance
+  const getView = useCallback(() => {
+    const editor = editorRef.current
+    if (!editor) return null
+    try {
+      return editor.action((ctx) => ctx.get(editorViewCtx))
+    } catch {
+      return null
+    }
+  }, [])
+
   // Execute a Milkdown action (for toolbar commands)
   const action = useCallback((fn: (editor: Editor) => void) => {
     const editor = editorRef.current
@@ -154,6 +235,7 @@ export function useMilkdown({ content, onChange, darkMode }: UseMilkdownOptions)
     getScrollTop,
     setScrollTop,
     getSelection,
-    setSelection
+    setSelection,
+    getView
   }
 }

src/renderer/components/SearchReplace/SearchReplace.tsx

@@ -1,101 +1,67 @@
 import React, { useState, useCallback, useRef, useEffect, memo } from 'react'
+import type { EditorView } from '@milkdown/prose/view'
+import { TextSelection } from '@milkdown/prose/state'
+import type { Node as ProseMirrorNode } from '@milkdown/prose/model'
+import { searchPluginKey, type SearchMatch, type SearchPluginState } from '../Editor/useMilkdown'
 
 interface SearchReplaceProps {
-  /** 获取 Milkdown 编辑器容器 DOM（用于遍历文本节点） */
+  /** 获取 ProseMirror EditorView 实例 */
-  editorContainer: HTMLDivElement | null
+  getView: () => EditorView | null
   /** 关闭面板 */
   onClose: () => void
 }
 
-const HIGHLIGHT_CLASS = 'search-match-highlight'
-const ACTIVE_HIGHLIGHT_CLASS = 'search-match-active'
-
 /**
- * 清除所有搜索高亮
+ * 在 ProseMirror 文档中查找所有匹配位置
  */
-function clearHighlights(root: HTMLElement) {
+function findMatches(doc: ProseMirrorNode, query: string, caseSensitive: boolean): SearchMatch[] {
-  const highlighted = root.querySelectorAll(`.${HIGHLIGHT_CLASS}, .${ACTIVE_HIGHLIGHT_CLASS}`)
+  const matches: SearchMatch[] = []
-  highlighted.forEach(el => {
+  if (!query) return matches
-    const parent = el.parentNode
-    if (!parent) return
-    while (el.firstChild) parent.insertBefore(el.firstChild, el)
-    parent.removeChild(el)
-  })
-  // 合并相邻文本节点
-  root.normalize()
-}
 
-/**
- * 高亮所有匹配项
- * 返回高亮后的元素列表（用于导航）
- */
-function highlightMatches(root: HTMLElement, query: string, caseSensitive: boolean): HTMLElement[] {
-  clearHighlights(root)
-  if (!query) return []
-
-  const matchElements: HTMLElement[] = []
-  const walker = document.createTreeWalker(root, NodeFilter.SHOW_TEXT, null)
   const normalizedQuery = caseSensitive ? query : query.toLowerCase()
 
-  const textNodes: Text[] = []
+  doc.descendants((node, pos) => {
-  let node: Node | null
+    if (!node.isText) return true
-  while ((node = walker.nextNode())) {
+    const text = node.text || ''
-    textNodes.push(node as Text)
-  }
-
-  // 从后往前处理，避免偏移量变化
-  for (let i = textNodes.length - 1; i >= 0; i--) {
-    const textNode = textNodes[i]
-    const text = textNode.textContent || ''
     const searchText = caseSensitive ? text : text.toLowerCase()
-
-    // 收集该文本节点中的所有匹配位置
-    const positions: number[] = []
     let offset = 0
     let idx: number
     while ((idx = searchText.indexOf(normalizedQuery, offset)) !== -1) {
-      positions.push(idx)
+      matches.push({ from: pos + idx, to: pos + idx + query.length })
       offset = idx + 1
     }
+    return true
+  })
 
-    if (positions.length === 0) continue
+  return matches
-
-    // 从后往前拆分文本节点并插入高亮
-    const parent = textNode.parentNode
-    if (!parent) continue
-
-    for (let j = positions.length - 1; j >= 0; j--) {
-      const pos = positions[j]
-      const afterText = text.substring(pos + query.length)
-      const matchText = text.substring(pos, pos + query.length)
-      const beforeText = text.substring(0, pos)
-
-      // 移除原始文本节点
-      if (j === positions.length - 1) {
-        parent.removeChild(textNode)
 }
 
-      // 插入后续文本
+/**
-      if (afterText) {
+ * 滚动到指定文档位置
-        parent.insertBefore(document.createTextNode(afterText), parent.children[0] || null)
+ */
-      }
+function scrollToPos(view: EditorView, pos: number) {
-
+  try {
-      // 插入高亮标记
+    const { node } = view.domAtPos(pos)
-      const mark = document.createElement('mark')
+    const el = node.nodeType === Node.TEXT_NODE ? node.parentElement : (node as HTMLElement)
-      mark.className = HIGHLIGHT_CLASS
+    el?.scrollIntoView({ behavior: 'smooth', block: 'center' })
-      mark.textContent = matchText
+  } catch {
-      mark.setAttribute('data-match-index', String(matchElements.length))
+    // Position may be out of range
-      parent.insertBefore(mark, parent.children[0] || null)
-      matchElements.unshift(mark)
-
-      // 插入前面文本（仅第一个匹配时）
-      if (j === 0 && beforeText) {
-        parent.insertBefore(document.createTextNode(beforeText), parent.children[0] || null)
-      }
   }
 }
 
-  return matchElements
+/**
+ * 更新 ProseMirror plugin state（触发 decorations 重绘）
+ */
+function dispatchSearchState(view: EditorView, state: SearchPluginState) {
+  const tr = view.state.tr.setMeta(searchPluginKey, state)
+  view.dispatch(tr)
+}
+
+/**
+ * 清除搜索高亮（dispatch 空状态）
+ */
+function clearSearchDecorations(view: EditorView) {
+  dispatchSearchState(view, { matches: [], currentIndex: -1, query: '' })
 }
 
 /**
@@ -109,7 +75,7 @@ function highlightMatches(root: HTMLElement, query: string, caseSensitive: boole
  * - ESC 关闭面板
  */
 export const SearchReplace = memo(function SearchReplace({
-  editorContainer,
+  getView,
   onClose
 }: SearchReplaceProps) {
   const [query, setQuery] = useState('')
@@ -120,104 +86,147 @@ export const SearchReplace = memo(function SearchReplace({
   const [currentMatch, setCurrentMatch] = useState(-1)
 
   const searchInputRef = useRef<HTMLInputElement>(null)
-  const matchElementsRef = useRef<HTMLElement[]>([])
   const panelRef = useRef<HTMLDivElement>(null)
 
+  // Keep latest state in refs for use in callbacks without stale closures
+  const matchesRef = useRef<SearchMatch[]>([])
+  const currentIndexRef = useRef(-1)
+  const caseSensitiveRef = useRef(false)
+  const queryRef = useRef('')
+
+  // Sync refs
+  caseSensitiveRef.current = caseSensitive
+  queryRef.current = query
+
   // 执行搜索
   const doSearch = useCallback((searchQuery: string, cs: boolean) => {
-    if (!editorContainer) return
+    const view = getView()
+    if (!view) return
 
     if (!searchQuery.trim()) {
-      clearHighlights(editorContainer)
+      clearSearchDecorations(view)
-      matchElementsRef.current = []
+      matchesRef.current = []
+      currentIndexRef.current = -1
       setMatchCount(0)
       setCurrentMatch(-1)
       return
     }
 
-    const elements = highlightMatches(editorContainer, searchQuery, cs)
+    const matches = findMatches(view.state.doc, searchQuery, cs)
-    matchElementsRef.current = elements
+    matchesRef.current = matches
-    setMatchCount(elements.length)
+    const newIdx = matches.length > 0 ? 0 : -1
+    currentIndexRef.current = newIdx
 
-    if (elements.length > 0) {
+    setMatchCount(matches.length)
-      setCurrentMatch(0)
+    setCurrentMatch(newIdx)
-      elements[0].classList.add(ACTIVE_HIGHLIGHT_CLASS)
+
-      elements[0].scrollIntoView({ behavior: 'smooth', block: 'center' })
+    // Dispatch to ProseMirror plugin to render decorations
-    } else {
+    dispatchSearchState(view, { matches, currentIndex: newIdx, query: searchQuery })
-      setCurrentMatch(-1)
+
+    // Scroll to first match
+    if (matches.length > 0) {
+      scrollToPos(view, matches[0].from)
     }
-  }, [editorContainer])
+  }, [getView])
 
   // 搜索框输入变化
   const handleQueryChange = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
     const value = e.target.value
     setQuery(value)
-    doSearch(value, caseSensitive)
+    doSearch(value, caseSensitiveRef.current)
-  }, [doSearch, caseSensitive])
+  }, [doSearch])
 
   // 大小写切换
   const toggleCaseSensitive = useCallback(() => {
-    const newCS = !caseSensitive
+    const newCS = !caseSensitiveRef.current
     setCaseSensitive(newCS)
-    doSearch(query, newCS)
+    doSearch(queryRef.current, newCS)
-  }, [caseSensitive, query, doSearch])
+  }, [doSearch])
 
   // 导航到下一个/上一个匹配
   const navigateMatch = useCallback((direction: 1 | -1) => {
-    const elements = matchElementsRef.current
+    const view = getView()
-    if (elements.length === 0) return
+    if (!view) return
 
-    // 移除当前高亮
+    const matches = matchesRef.current
-    if (currentMatch >= 0 && currentMatch < elements.length) {
+    if (matches.length === 0) return
-      elements[currentMatch].classList.remove(ACTIVE_HIGHLIGHT_CLASS)
-    }
 
-    let next = currentMatch + direction
+    let next = currentIndexRef.current + direction
-    if (next >= elements.length) next = 0
+    if (next >= matches.length) next = 0
-    if (next < 0) next = elements.length - 1
+    if (next < 0) next = matches.length - 1
 
+    currentIndexRef.current = next
     setCurrentMatch(next)
-    elements[next].classList.add(ACTIVE_HIGHLIGHT_CLASS)
+
-    elements[next].scrollIntoView({ behavior: 'smooth', block: 'center' })
+    // Update plugin state to move the active highlight
-  }, [currentMatch])
+    dispatchSearchState(view, {
+      matches,
+      currentIndex: next,
+      query: queryRef.current
+    })
+
+    // Scroll to match and select it
+    const match = matches[next]
+    try {
+      const tr = view.state.tr.setSelection(
+        TextSelection.create(view.state.doc, match.from, match.to)
+      )
+      view.dispatch(tr)
+    } catch {
+      // Selection range might be invalid
+    }
+    scrollToPos(view, match.from)
+  }, [getView])
 
   // 替换当前匹配
   const replaceCurrent = useCallback(() => {
-    if (currentMatch < 0 || !editorContainer) return
+    const view = getView()
+    if (!view) return
 
-    const elements = matchElementsRef.current
+    const matches = matchesRef.current
-    const el = elements[currentMatch]
+    const idx = currentIndexRef.current
-    if (!el || !el.parentNode) return
+    if (idx < 0 || idx >= matches.length) return
 
-    // 替换文本
+    const match = matches[idx]
-    const textNode = document.createTextNode(replacement)
-    el.parentNode.replaceChild(textNode, el)
-    editorContainer.normalize()
 
-    // 重新搜索
+    // Replace text in ProseMirror document
-    doSearch(query, caseSensitive)
+    const tr = view.state.tr.insertText(replacement, match.from, match.to)
-  }, [currentMatch, replacement, editorContainer, query, caseSensitive, doSearch])
+    view.dispatch(tr)
+
+    // Re-search after replacement (document changed)
+    // Use requestAnimationFrame to let ProseMirror process the transaction
+    requestAnimationFrame(() => {
+      doSearch(queryRef.current, caseSensitiveRef.current)
+    })
+  }, [getView, replacement, doSearch])
 
   // 全部替换
   const replaceAll = useCallback(() => {
-    if (!editorContainer || matchCount === 0) return
+    const view = getView()
+    if (!view) return
 
-    const elements = [...matchElementsRef.current]
+    const matches = matchesRef.current
-    elements.forEach(el => {
+    if (matches.length === 0) return
-      if (el.parentNode) {
+
-        el.parentNode.replaceChild(document.createTextNode(replacement), el)
+    // Process matches in reverse order to preserve positions
+    const tr = view.state.tr
+    for (let i = matches.length - 1; i >= 0; i--) {
+      tr.insertText(replacement, matches[i].from, matches[i].to)
     }
-    })
+    view.dispatch(tr)
-    editorContainer.normalize()
 
-    doSearch(query, caseSensitive)
+    // Re-search after replacement
-  }, [editorContainer, matchCount, replacement, query, caseSensitive, doSearch])
+    requestAnimationFrame(() => {
+      doSearch(queryRef.current, caseSensitiveRef.current)
+    })
+  }, [getView, replacement, doSearch])
 
   // 键盘事件
   const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
     if (e.key === 'Escape') {
       e.preventDefault()
-      if (editorContainer) clearHighlights(editorContainer)
+      const view = getView()
+      if (view) clearSearchDecorations(view)
       onClose()
       return
     }
@@ -229,7 +238,7 @@ export const SearchReplace = memo(function SearchReplace({
         navigateMatch(1)
       }
     }
-  }, [onClose, navigateMatch, editorContainer])
+  }, [onClose, navigateMatch, getView])
 
   // 全局 Ctrl+F / Ctrl+H 拦截
   useEffect(() => {
@@ -258,12 +267,14 @@ export const SearchReplace = memo(function SearchReplace({
     searchInputRef.current?.select()
   }, [])
 
-  // 清理高亮
+  // 清理高亮（组件卸载时）
   useEffect(() => {
     return () => {
-      if (editorContainer) clearHighlights(editorContainer)
+      const view = getView()
+      if (view) clearSearchDecorations(view)
     }
-  }, [editorContainer])
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [])
 
   return (
     <div
@@ -327,7 +338,8 @@ export const SearchReplace = memo(function SearchReplace({
         <button
           className="search-btn search-close"
           onClick={() => {
-            if (editorContainer) clearHighlights(editorContainer)
+            const view = getView()
+            if (view) clearSearchDecorations(view)
             onClose()
           }}
           title="关闭 (Esc)"