新增：Markdown编辑器/数据库优化/安全修复

- Markdown 编辑器：实时预览、PDF 导出、独立查看器
- 数据库优化：动态连接池、查询缓存、Redis Pipeline
- 窗口置顶功能
- 文件系统增强：右键菜单、编辑器集成、收藏夹重构
- 安全修复：XSS 防护、路径穿越、HTML 注入
- 代码质量：正则预编译、缓存锁优化、死代码清理

web/src/components/FileSystem/composables/useFavorites.ts

@@ -3,8 +3,10 @@
  * 提供收藏文件的添加、删除、排序等功能
  */
 
-import { ref, watch } from 'vue'
-import { STORAGE_KEYS } from '@/utils/constants'
+import { ref } from 'vue'
+import { STORAGE_KEYS, DEFAULTS } from '@/utils/constants'
+import { getPathSeparator } from '@/utils/fileUtils'
+import { Message } from '@arco-design/web-vue'
 import type { FavoriteFile, FileItem, DraggingState } from '@/types/file-system'
 
 export function useFavorites() {
@@ -67,13 +69,23 @@ export function useFavorites() {
     }
   }
 
+  /**
+   * 标准化路径用于比较（Windows 大小写不敏感）
+   */
+  const normalizePath = (path: string): string => {
+    return path.toLowerCase()
+  }
+
   /**
    * 添加收藏
    */
   const addFavorite = (file: FileItem) => {
-    // 检查是否已存在
-    const exists = favorites.value.some(fav => fav.path === file.path)
-    if (exists) {
+    if (isFavorite(file.path)) {
+      return false
+    }
+
+    if (favorites.value.length >= DEFAULTS.MAX_FAVORITES_LENGTH) {
+      Message.warning(`收藏夹已满，最多收藏 ${DEFAULTS.MAX_FAVORITES_LENGTH} 项`)
       return false
     }
 
@@ -81,17 +93,11 @@ export function useFavorites() {
       ...file,
       addedAt: Date.now()
     } as FavoriteFile)
+    sortFavorites()
     saveFavorites()
     return true
   }
 
-  /**
-   * 标准化路径用于比较（后端已统一为 /，直接转小写）
-   */
-  const normalizePath = (path: string): string => {
-    return path.toLowerCase()
-  }
-
   /**
    * 删除收藏
    */
@@ -108,14 +114,12 @@ export function useFavorites() {
    * 切换收藏状态
    */
   const toggleFavorite = (file: FileItem) => {
-    const exists = isFavorite(file.path)
-    if (exists) {
+    if (isFavorite(file.path)) {
       removeFavorite(file.path)
       return false
-    } else {
-      addFavorite(file)
-      return true
     }
+    addFavorite(file)
+    return true
   }
 
   /**
@@ -131,15 +135,9 @@ export function useFavorites() {
    */
   const togglePin = (path: string) => {
     const normalizedPath = normalizePath(path)
-    const fav = favorites.value.find(f => normalizePath(f.path) === normalizedPath)
+    const fav = favorites.value.find(f => normalizePath(fav.path) === normalizedPath)
     if (fav) {
-      if (fav.pinnedAt) {
-        // 取消置顶
-        fav.pinnedAt = undefined
-      } else {
-        // 设置置顶
-        fav.pinnedAt = Date.now()
-      }
+      fav.pinnedAt = fav.pinnedAt ? undefined : Date.now()
       sortFavorites()
       saveFavorites()
     }
@@ -150,28 +148,37 @@ export function useFavorites() {
    */
   const isPinned = (path: string): boolean => {
     const normalizedPath = normalizePath(path)
-    const fav = favorites.value.find(f => normalizePath(f.path) === normalizedPath)
+    const fav = favorites.value.find(f => normalizePath(fav.path) === normalizedPath)
     return !!fav?.pinnedAt
   }
 
   /**
-   * 长按开始
+   * 更新收藏项路径（重命名时使用，保留置顶状态和添加时间）
    */
-  const onLongPressStart = (event: MouseEvent | TouchEvent, index: number) => {
-    const isMouse = event instanceof MouseEvent
-    const isTouch = event instanceof TouchEvent
+  const updateFavoritePath = (oldPath: string, newName: string) => {
+    const normalizedOld = normalizePath(oldPath)
+    const fav = favorites.value.find(f => normalizePath(fav.path) === normalizedOld)
+    if (!fav) return
 
-    // 只支持鼠标左键或触摸
-    if (isMouse && event.button !== 0) return
-    if (!isMouse && !isTouch) return
+    const separator = getPathSeparator(oldPath)
+    const parentPath = oldPath.substring(
+      0,
+      Math.max(oldPath.lastIndexOf('\\'), oldPath.lastIndexOf('/'))
+    )
+    fav.path = parentPath + separator + newName
+    fav.name = newName
+    saveFavorites()
+  }
+
+  // 拖拽方法
+  const onLongPressStart = (event: MouseEvent | TouchEvent, index: number) => {
+    if (event instanceof MouseEvent && event.button !== 0) return
+    if (!(event instanceof MouseEvent) && !(event instanceof TouchEvent)) return
 
     draggingState.value.pressedIndex = index
     draggingState.value.draggedIndex = index
   }
 
-  /**
-   * 长按取消
-   */
   const onLongPressCancel = () => {
     if (!draggingState.value.isDragging) {
       draggingState.value.pressedIndex = -1
@@ -179,23 +186,15 @@ export function useFavorites() {
     }
   }
 
-  /**
-   * 拖拽开始
-   */
   const onDragStart = (event: DragEvent, index: number) => {
     draggingState.value.isDragging = true
     draggingState.value.draggedIndex = index
-
-    // 设置拖拽数据
     if (event.dataTransfer) {
       event.dataTransfer.effectAllowed = 'move'
       event.dataTransfer.setData('text/plain', index.toString())
     }
   }
 
-  /**
-   * 拖拽经过
-   */
   const onDragOver = (event: DragEvent) => {
     event.preventDefault()
     if (event.dataTransfer) {
@@ -203,81 +202,53 @@ export function useFavorites() {
     }
   }
 
-  /**
-   * 放置
-   */
   const onDrop = (event: DragEvent, targetIndex: number) => {
     event.preventDefault()
 
     const fromIndex = draggingState.value.draggedIndex
-    const toIndex = targetIndex
-
-    if (fromIndex === toIndex || fromIndex === -1) {
+    if (fromIndex === targetIndex || fromIndex === -1) {
       resetDragging()
       return
     }
 
-    // 移动元素
     const item = favorites.value.splice(fromIndex, 1)[0]
-    favorites.value.splice(toIndex, 0, item)
+    favorites.value.splice(targetIndex, 0, item)
     saveFavorites()
-
     resetDragging()
   }
 
-  /**
-   * 拖拽结束
-   */
   const onDragEnd = () => {
     resetDragging()
   }
 
-  /**
-   * 重置拖拽状态
-   */
   const resetDragging = () => {
     draggingState.value.isDragging = false
     draggingState.value.draggedIndex = -1
     draggingState.value.pressedIndex = -1
   }
 
-  /**
-   * 重新排序
-   */
-  const reorder = (fromIndex: number, toIndex: number) => {
-    if (fromIndex === toIndex) return
-
-    const item = favorites.value.splice(fromIndex, 1)[0]
-    favorites.value.splice(toIndex, 0, item)
-    saveFavorites()
-  }
-
   // 组件挂载时加载收藏列表
   loadFavorites()
 
   return {
-    // 状态
     favorites,
     draggingState,
 
-    // 方法
     addFavorite,
     removeFavorite,
     toggleFavorite,
     isFavorite,
     togglePin,
     isPinned,
+    updateFavoritePath,
 
-    // 拖拽方法
     onLongPressStart,
     onLongPressCancel,
     onDragStart,
     onDragOver,
     onDrop,
     onDragEnd,
-    reorder,
 
-    // 工具方法
     loadFavorites,
     saveFavorites,
     resetDragging