重构: 死代码清理 + 拷贝优化 + 滚动条修复

2026-04-11 23:36:08 +08:00
parent 7dbd57a8b6
commit 756028af0f
39 changed files with 185 additions and 1308 deletions
--- a/app.go
+++ b/app.go
@@ -6,16 +6,13 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
-	"regexp"
 	stdruntime "runtime"
 	"strings"
 	"time"

-	"github.com/jung-kurt/gofpdf"
 	"golang.org/x/sys/windows/registry"
 	"u-desk/internal/api"
 	"u-desk/internal/common"
-	"u-desk/internal/database"
 	"u-desk/internal/filesystem"
 	"u-desk/internal/service"
 	"u-desk/internal/storage"
@@ -24,13 +21,9 @@ import (
 	"github.com/wailsapp/wails/v2/pkg/runtime"
 )

-// PDF 有序列表正则（包级变量，避免循环内重复编译）
-var orderedListRe = regexp.MustCompile(`^\d+\.\s+`)
-
 // App 应用结构体
 type App struct {
 	ctx             context.Context
-	db              *database.DB
 	connectionAPI   *api.ConnectionAPI
 	sqlAPI          *api.SqlAPI
 	tabAPI          *api.TabAPI
@@ -229,36 +222,6 @@ func (a *App) Shutdown(ctx context.Context) {
 	}
 }

-// QueryUsers 查询用户列表
-func (a *App) QueryUsers(keyword string, status int, role int, organid int, page int, pageSize int, sortField string, sortOrder string) (map[string]interface{}, error) {
-	db, err := a.getDB()
-	if err != nil {
-		return nil, err
-	}
-	return db.QueryUsers(keyword, status, role, organid, page, pageSize, sortField, sortOrder)
-}
-
-// getDB 获取数据库连接（延迟加载，按需初始化）
-func (a *App) getDB() (*database.DB, error) {
-	if a.db != nil {
-		return a.db, nil
-	}
-
-	// 首次调用时才连接数据库
-	db, err := database.Init()
-	if err != nil {
-		return nil, fmt.Errorf("数据库连接失败: %v", err)
-	}
-
-	a.db = db
-	return db, nil
-}
-
-// Greet 测试方法
-func (a *App) Greet(name string) string {
-	return "Hello " + name + ", It's show time!"
-}
-
 // GetSystemInfo 获取系统信息
 func (a *App) GetSystemInfo() (map[string]interface{}, error) {
 	return system.GetSystemInfo()
@@ -992,70 +955,3 @@ func (a *App) SelectPDFSaveDirectory() (string, error) {
 	return a.pdfAPI.SelectDirectory()
 }

-// ExportMarkdownToPDF 使用gofpdf导出Markdown为PDF
-func (a *App) ExportMarkdownToPDF(markdownContent string) (string, error) {
-	// 1. 弹出保存对话框
-	savePath, err := runtime.SaveFileDialog(a.ctx, runtime.SaveDialogOptions{
-		Title: "保存 PDF",
-		DefaultFilename: "document.pdf",
-		Filters: []runtime.FileFilter{
-			{DisplayName: "PDF 文件", Pattern: "*.pdf"},
-		},
-	})
-	if err != nil || savePath == "" {
-		return "", err
-	}
-	
-	// 2. 创建PDF
-	pdf := gofpdf.New("P", "mm", "A4", "")
-	pdf.AddPage()
-	pdf.SetAutoPageBreak(true, 15)
-	
-	// 3. 解析Markdown并写入PDF
-	lines := strings.Split(markdownContent, "\n")
-	for _, line := range lines {
-		if strings.HasPrefix(line, "# ") {
-			// H1 标题
-			pdf.SetFont("Arial", "B", 24)
-			pdf.Cell(40, 10, strings.TrimPrefix(line, "# "))
-			pdf.Ln(12)
-		} else if strings.HasPrefix(line, "## ") {
-			// H2 标题
-			pdf.SetFont("Arial", "B", 18)
-			pdf.Cell(40, 10, strings.TrimPrefix(line, "## "))
-			pdf.Ln(10)
-		} else if strings.HasPrefix(line, "### ") {
-			// H3 标题
-			pdf.SetFont("Arial", "B", 14)
-			pdf.Cell(40, 10, strings.TrimPrefix(line, "### "))
-			pdf.Ln(8)
-		} else if strings.HasPrefix(line, "- ") || strings.HasPrefix(line, "* ") {
-			// 无序列表
-			pdf.SetFont("Arial", "", 12)
-			pdf.Cell(10, 7, "•")
-			pdf.Cell(0, 7, strings.TrimPrefix(line, "- "))
-			pdf.Ln(7)
-	} else if orderedListRe.MatchString(line) {
-			// 有序列表
-			pdf.SetFont("Arial", "", 12)
-			pdf.Cell(10, 7, strings.TrimSpace(strings.SplitN(line, ".", 2)[0]) + ".")
-			pdf.Cell(0, 7, strings.TrimSpace(strings.SplitN(line, ".", 2)[1]))
-			pdf.Ln(7)
-		} else if line == "" {
-			// 空行
-			pdf.Ln(7)
-		} else {
-			// 普通文本
-			pdf.SetFont("Arial", "", 12)
-			pdf.MultiCell(190, 7, line, "", "", false)
-		}
-	}
-	
-	// 4. 保存文件
-	err = pdf.OutputFileAndClose(savePath)
-	if err != nil {
-		return "", fmt.Errorf("保存PDF文件失败: %v", err)
-	}
-	
-	return savePath, nil
-}
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,6 @@ require (
 	github.com/chromedp/chromedp v0.14.2
 	github.com/glebarez/sqlite v1.11.0
 	github.com/go-sql-driver/mysql v1.9.3
-	github.com/jung-kurt/gofpdf v1.16.2
 	github.com/redis/go-redis/v9 v9.17.3
 	github.com/shirou/gopsutil/v3 v3.24.5
 	github.com/wailsapp/wails/v2 v2.12.0
--- a/go.sum
+++ b/go.sum
@@ -4,7 +4,6 @@ git.sr.ht/~jackmordaunt/go-toast/v2 v2.0.3 h1:N3IGoHHp9pb6mj1cbXbuaSXV/UMKwmbKLf
 git.sr.ht/~jackmordaunt/go-toast/v2 v2.0.3/go.mod h1:QtOLZGz8olr4qH2vWK0QH0w0O4T9fEIjMuWpKUsH7nc=
 github.com/bep/debounce v1.2.1 h1:v67fRdBA9UQu2NhLFXrSg0Brw7CexQekrBwDMM8bzeY=
 github.com/bep/debounce v1.2.1/go.mod h1:H8yggRPQKLUhUoqrJC1bO2xNya7vanpDl7xR3ISbCJ0=
-github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
 github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
 github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
@@ -17,7 +16,6 @@ github.com/chromedp/chromedp v0.14.2 h1:r3b/WtwM50RsBZHMUm9fsNhhzRStTHrKdr2zmwbZ
 github.com/chromedp/chromedp v0.14.2/go.mod h1:rHzAv60xDE7VNy/MYtTUrYreSc0ujt2O1/C3bzctYBo=
 github.com/chromedp/sysutil v1.1.0 h1:PUFNv5EcprjqXZD9nJb9b/c9ibAbxiYo4exNWZyipwM=
 github.com/chromedp/sysutil v1.1.0/go.mod h1:WiThHUdltqCNKGc4gaU50XgYjwjYIhKWoHGPTUfWTJ8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
@@ -59,9 +57,6 @@ github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
 github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
-github.com/jung-kurt/gofpdf v1.0.0/go.mod h1:7Id9E/uU8ce6rXgefFLlgrJj/GYY22cpxn+r32jIOes=
-github.com/jung-kurt/gofpdf v1.16.2 h1:jgbatWHfRlPYiK85qgevsZTHviWXKwB1TTiKdz5PtRc=
-github.com/jung-kurt/gofpdf v1.16.2/go.mod h1:1hl7y57EsiPAkLbOwzpzqgx1A30nQCk/YmFV8S2vmK0=
 github.com/klauspost/compress v1.18.3 h1:9PJRvfbmTabkOX8moIpXPbMMbYN60bWImDDU7L+/6zw=
 github.com/klauspost/compress v1.18.3/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
 github.com/labstack/echo/v4 v4.15.0 h1:hoRTKWcnR5STXZFe9BmYun9AMTNeSbjHi2vtDuADJ24=
@@ -93,10 +88,8 @@ github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOF
 github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/orisano/pixelmatch v0.0.0-20220722002657-fb0b55479cde h1:x0TT0RDC7UhAVbbWWBzr41ElhJx5tXPWkIHA2HWPRuw=
 github.com/orisano/pixelmatch v0.0.0-20220722002657-fb0b55479cde/go.mod h1:nZgzbfBr3hhjoZnS66nKrHmduYNpc34ny7RK4z5/HM0=
-github.com/phpdave11/gofpdi v1.0.7/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
 github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c h1:+mdjkGKdHQG3305AYmdv1U2eRNDiU2ErMBj1gwrq8eQ=
 github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjLxUqIJNnCWiEdr3bn6IUYi15bNlnbCCU=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -110,7 +103,6 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qq
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
-github.com/ruudk/golang-pdf417 v0.0.0-20181029194003-1af4ab5afa58/go.mod h1:6lfFZQK844Gfx8o5WFuvpxWRwnSoipWe/p622j1v06w=
 github.com/samber/lo v1.52.0 h1:Rvi+3BFHES3A8meP33VPAxiBZX/Aws5RxrschYGjomw=
 github.com/samber/lo v1.52.0/go.mod h1:4+MXEGsJzbKGaUEQFKBq2xtfuznW9oz/WrgyzMzRoM0=
 github.com/shirou/gopsutil/v3 v3.24.5 h1:i0t8kL+kQTvpAYToeuiVk3TgDeKOFioZO3Ztz/iZ9pI=
@@ -119,7 +111,6 @@ github.com/shoenig/go-m1cpu v0.1.7 h1:C76Yd0ObKR82W4vhfjZiCp0HxcSZ8Nqd84v+HZ0qyI
 github.com/shoenig/go-m1cpu v0.1.7/go.mod h1:KkDOw6m3ZJQAPHbrzkZki4hnx+pDRR1Lo+ldA56wD5w=
 github.com/shoenig/test v1.7.0 h1:eWcHtTXa6QLnBvm0jgEabMRN/uJ4DMV3M8xUGgRkZmk=
 github.com/shoenig/test v1.7.0/go.mod h1:UxJ6u/x2v/TNs/LoLxBNJRV9DiwBBKYxXSyczsBHFoI=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/tklauser/go-sysconf v0.3.16 h1:frioLaCQSsF5Cy1jgRBrzr6t502KIIwQ0MArYICU0nA=
@@ -159,7 +150,6 @@ golang.org/x/crypto v0.47.0 h1:V6e3FRj+n4dbpw86FJ8Fv7XVOql7TEwpHapKoMJ/GO8=
 golang.org/x/crypto v0.47.0/go.mod h1:ff3Y9VzzKbwSSEzWqJsJVBnWmRwRSHt/6Op5n9bQc4A=
 golang.org/x/exp v0.0.0-20260112195511-716be5621a96 h1:Z/6YuSHTLOHfNFdb8zVZomZr7cqNgTJvA8+Qz75D8gU=
 golang.org/x/exp v0.0.0-20260112195511-716be5621a96/go.mod h1:nzimsREAkjBCIEFtHiYkrJyT+2uy9YZJB7H1k68CXZU=
-golang.org/x/image v0.0.0-20190910094157-69e4b8554b2a/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.32.0 h1:9F4d3PHLljb6x//jOyokMv3eX+YDeepZSEo3mFJy93c=
 golang.org/x/mod v0.32.0/go.mod h1:SgipZ/3h2Ci89DlEtEXWUk/HteuRin+HHhN+WbNhguU=
--- a/internal/common/constants.go
+++ b/internal/common/constants.go
@@ -12,6 +12,3 @@ const (

 // DefaultVisibleTabs 默认可见的 Tabs
 var DefaultVisibleTabs = []string{TabDatabase, TabFileSystem, TabDevice}
-
-// DefaultTab 默认打开的 Tab
-const DefaultTab = TabDatabase
--- a/internal/common/utils.go
+++ b/internal/common/utils.go
@@ -61,12 +61,3 @@ func IsWindows() bool {
 	return runtime.GOOS == "windows"
 }

-// IsMac 判断是否为Mac系统
-func IsMac() bool {
-	return runtime.GOOS == "darwin"
-}
-
-// IsLinux 判断是否为Linux系统
-func IsLinux() bool {
-	return runtime.GOOS == "linux"
-}
--- a/internal/filesystem/asset_handler.go
+++ b/internal/filesystem/asset_handler.go
@@ -2,7 +2,6 @@ package filesystem

 import (
 	"context"
-	"encoding/base64"
 	"fmt"
 	"log"
 	"net/http"
@@ -303,52 +302,6 @@ func getContentType(ext string) string {
 	return defaultFileTypeManager.GetMIMEType(ext)
 }

-// ReadFileAsBase64 读取文件并返回 base64 编码的字符串
-// 用于读取从 ZIP 提取的临时图片文件
-func ReadFileAsBase64(filePath string) (string, error) {
-	log.Printf("[ReadFileAsBase64] 读取文件: %s", filePath)
-
-	if !isSafePath(filePath) {
-		return "", fmt.Errorf("路径不安全")
-	}
-
-	// 检查文件是否存在
-	fileInfo, err := os.Stat(filePath)
-	if err != nil {
-		if os.IsNotExist(err) {
-			return "", fmt.Errorf("文件不存在: %s", filePath)
-		}
-		return "", fmt.Errorf("无法访问文件: %v", err)
-	}
-
-	log.Printf("[ReadFileAsBase64] 文件大小: %d bytes", fileInfo.Size())
-
-	// 读取文件
-	data, err := os.ReadFile(filePath)
-	if err != nil {
-		return "", fmt.Errorf("读取文件失败: %v", err)
-	}
-
-	// 编码为 base64
-	encoded := base64.StdEncoding.EncodeToString(data)
-	log.Printf("[ReadFileAsBase64] 编码成功: 原始=%d, base64=%d", len(data), len(encoded))
-
-	// 获取文件扩展名并确定 MIME 类型
-	ext := strings.ToLower(filepath.Ext(filePath))
-	mimeType := getContentType(ext)
-
-	// 返回 data URI 格式: data:image/png;base64,iVBORw0KG...
-	return fmt.Sprintf("data:%s;base64,%s", mimeType, encoded), nil
-}
-
-// HandleLocalFile 处理 /localfs/ 路由的 HTTP 请求
-// 前端可以请求 http://localhost:18765/localfs/C:/path/to/image.jpg
-// 注意：此函数与 ServeHTTP 功能重复，建议统一使用 ServeHTTP
-func HandleLocalFile(w http.ResponseWriter, r *http.Request) {
-	handler := NewLocalFileHandler()
-	handler.ServeHTTP(w, r)
-}
-
 // isAllowedFileType 检查文件类型是否在白名单中
 func isAllowedFileType(ext string) bool {
 	return defaultFileTypeManager.IsAllowed(ext)
--- a/internal/filesystem/audit_log.go
+++ b/internal/filesystem/audit_log.go
@@ -220,37 +220,6 @@ func (a *AuditLogger) Close() error {
 	return a.logFile.Close()
 }

-// RotateLog 日志轮转（每天创建新文件）
-func (a *AuditLogger) RotateLog() error {
-	a.mu.Lock()
-	defer a.mu.Unlock()
-
-	// 刷新缓冲区
-	if err := a.flush(); err != nil {
-		return err
-	}
-
-	// 关闭当前文件
-	if err := a.logFile.Close(); err != nil {
-		return err
-	}
-
-	// 生成新的日志文件名
-	timestamp := time.Now().Format("2006-01-02")
-	logPath := filepath.Join(filepath.Dir(a.logPath), fmt.Sprintf("audit_%s.log", timestamp))
-
-	// 打开新文件
-	logFile, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
-	if err != nil {
-		return err
-	}
-
-	a.logFile = logFile
-	a.logPath = logPath
-
-	return nil
-}
-
 // GetRecentLogs 获取最近的审计日志
 func GetRecentLogs(logDir string, limit int) ([]AuditLogEntry, error) {
 	// 读取今天的日志文件
@@ -309,22 +278,8 @@ func parseLines(text string) []string {
 var globalAuditLogger *AuditLogger
 var auditLoggerOnce sync.Once

-// InitAuditLogger 初始化全局审计日志记录器
-func InitAuditLogger(logDir string) error {
-	var err error
-	globalAuditLogger, err = NewAuditLogger(logDir)
-	return err
-}
-
 // GetAuditLogger 获取全局审计日志记录器
 func GetAuditLogger() *AuditLogger {
 	return globalAuditLogger
 }

-// CloseAuditLogger 关闭全局审计日志记录器
-func CloseAuditLogger() error {
-	if globalAuditLogger != nil {
-		return globalAuditLogger.Close()
-	}
-	return nil
-}
--- a/internal/filesystem/constants.go
+++ b/internal/filesystem/constants.go
@@ -13,22 +13,13 @@ const (

 	// HTTP 文件服务大小限制
 	MaxHTTPFileSize = 500 * 1024 * 1024 // 500MB - HTTP 访问文件最大大小
-
-	// 删除操作限制
-	MaxDeleteSizeGB = 1 * 1024 * 1024 * 1024 // 1GB - 单个文件删除大小限制
-	MaxDeleteDirSizeGB = 1 * 1024 * 1024 * 1024 // 1GB - 目录删除大小限制
 )

 // 时间相关常量
 const (
 	// 审计日志
-	AuditFlushInterval  = 5 * time.Second  // 审计日志刷新间隔
 	AuditLogBufferSize  = 100              // 审计日志缓冲区大小

-	// 回收站
-	RecycleBinRetentionDays = 30            // 回收站文件保留天数（天）
-	RecycleBinRetentionPeriod = 30 * 24 * time.Hour // 回收站文件保留期
-
 	// 临时文件
 	TempFileCleanupAge = 24 * time.Hour     // 临时文件清理周期
 	TempFileDir        = "u-desk-zip"       // 临时文件目录名
@@ -36,7 +27,6 @@ const (

 // 数量限制常量
 const (
-	MaxDirectoryDepth = 15  // 最大目录深度
 	MaxFileCount      = 1000 // 最大文件数量（目录）
 )

@@ -48,15 +38,9 @@ const (

 // 随机字符串相关常量
 const (
-	RandomStringCharset = "abcdefghijklmnopqrstuvwxyz0123456789"
 	RandomStringDefaultLength = 6 // 回收站文件名随机后缀长度
 )

-// 文件路径相关常量
-const (
-	WindowsDriveLength = 2 // Windows 盘符长度 (C:)
-)
-
 // 路径遍历检测字符串
 const (
 	PathTraversalPattern = ".." // 路径遍历特征字符串
@@ -69,17 +53,5 @@ const (
 	FileTypeAudio = "audio"
 	FileTypeDocument = "document"
 	FileTypeText = "text"
-	FileTypeArchive = "archive"
 	FileTypeApplication = "application"
 )
-
-// 安全相关常量
-const (
-	// ZIP 安全
-	MinValidZipSize = 22 // ZIP 文件最小有效大小（文件头）
-	ZipFileHeaderSignature = 0x504B // "PK" - ZIP 文件头签名
-
-	// 文件锁
-	LockCheckMaxRetries = 3              // 文件锁检查最大重试次数
-	LockCheckRetryInterval = 100 * time.Millisecond // 文件锁检查重试间隔
-)
--- a/internal/filesystem/errors.go
+++ b/internal/filesystem/errors.go
@@ -6,130 +6,6 @@ import (
 	"runtime"
 )

-// ErrorCode 错误码类型
-type ErrorCode string
-
-const (
-	// 通用错误
-	ErrCodeGeneral     ErrorCode = "GENERAL_ERROR"
-	ErrCodeInvalid     ErrorCode = "INVALID_ARGUMENT"
-	ErrCodeNotFound    ErrorCode = "NOT_FOUND"
-	ErrCodePermission  ErrorCode = "PERMISSION_DENIED"
-	ErrCodeIO          ErrorCode = "IO_ERROR"
-
-	// 路径相关错误
-	ErrCodePathTraversal  ErrorCode = "PATH_TRAVERSAL"
-	ErrCodeInvalidPath    ErrorCode = "INVALID_PATH"
-	ErrCodeSensitivePath  ErrorCode = "SENSITIVE_PATH"
-
-	// 文件操作错误
-	ErrCodeFileNotFound    ErrorCode = "FILE_NOT_FOUND"
-	ErrCodeFileExists      ErrorCode = "FILE_EXISTS"
-	ErrCodeDirectoryNotEmpty ErrorCode = "DIRECTORY_NOT_EMPTY"
-
-	// 安全相关错误
-	ErrCodeSecurityViolation ErrorCode = "SECURITY_VIOLATION"
-	ErrCodeSizeLimit        ErrorCode = "SIZE_LIMIT_EXCEEDED"
-	ErrCodeFileLocked      ErrorCode = "FILE_LOCKED"
-
-	// ZIP相关错误
-	ErrCodeZipInvalid    ErrorCode = "ZIP_INVALID"
-	ErrCodeZipBomb       ErrorCode = "ZIP_BOMB"
-	ErrCodeZipExtract    ErrorCode = "ZIP_EXTRACT_FAILED"
-)
-
-// FileError 文件系统专用错误类型
-// 包含详细的错误上下文信息，便于调试和用户提示
-type FileNotFoundError struct {
-	Path string
-	Err  error
-}
-
-func (e *FileNotFoundError) Error() string {
-	return fmt.Sprintf("文件不存在: %s", e.Path)
-}
-
-func (e *FileNotFoundError) Unwrap() error {
-	return e.Err
-}
-
-// PathValidationError 路径验证错误
-type PathValidationError struct {
-	Path        string
-	Reason      string
-	IsSensitive bool
-}
-
-func (e *PathValidationError) Error() string {
-	return fmt.Sprintf("路径验证失败: %s - %s", e.Path, e.Reason)
-}
-
-// SecurityViolationError 安全违规错误
-type SecurityViolationError struct {
-	Path       string
-	Violation  string
-	Suggestion string
-}
-
-func (e *SecurityViolationError) Error() string {
-	msg := fmt.Sprintf("安全违规: %s - %s", e.Path, e.Violation)
-	if e.Suggestion != "" {
-		msg += fmt.Sprintf("\n建议: %s", e.Suggestion)
-	}
-	return msg
-}
-
-// SizeLimitError 大小限制错误
-type SizeLimitError struct {
-	Path        string
-	ActualSize  int64
-	MaxSize     int64
-	SizeType    string // "file" or "directory"
-}
-
-func (e *SizeLimitError) Error() string {
-	return fmt.Sprintf("%s大小超限: %s (实际: %.2f GB, 限制: %.2f GB)",
-		e.SizeType, e.Path,
-		float64(e.ActualSize)/(1024*1024*1024),
-		float64(e.MaxSize)/(1024*1024*1024),
-	)
-}
-
-// FileLockedError 文件锁定错误
-type FileLockedError struct {
-	Path        string
-	ProcessInfo string
-}
-
-func (e *FileLockedError) Error() string {
-	msg := fmt.Sprintf("文件被占用: %s", e.Path)
-	if e.ProcessInfo != "" {
-		msg += fmt.Sprintf("\n占用程序: %s", e.ProcessInfo)
-	}
-	return msg
-}
-
-// WrapError 错误包装函数
-// 添加上下文信息到错误中
-func WrapError(operation string, path string, err error) error {
-	return fmt.Errorf("%s 失败: %s - %w", operation, path, err)
-}
-
-// WrapErrorf 格式化错误包装
-func WrapErrorf(format string, args ...interface{}) error {
-	return fmt.Errorf(format, args...)
-}
-
-// GetStackTrace 获取堆栈跟踪（用于调试）
-func GetStackTrace(skip int) string {
-	buf := make([]byte, 4096)
-	n := runtime.Stack(buf, false)
-	if n > 0 {
-		return string(buf[:n])
-	}
-	return ""
-}
-
 // DeleteRestrictionWarning 删除限制警告
 // 用于在删除受限文件时提供详细的警告信息
 type DeleteRestrictionWarning struct {
@@ -141,3 +17,13 @@ type DeleteRestrictionWarning struct {
 func (w *DeleteRestrictionWarning) Error() string {
 	return fmt.Sprintf("删除限制警告: %s\n%s", w.Path, w.Details)
 }
+
+// GetStackTrace 获取堆栈跟踪（用于调试）
+func GetStackTrace(skip int) string {
+	buf := make([]byte, 4096)
+	n := runtime.Stack(buf, false)
+	if n > 0 {
+		return string(buf[:n])
+	}
+	return ""
+}
--- a/internal/filesystem/file_lock.go
+++ b/internal/filesystem/file_lock.go
@@ -4,14 +4,6 @@ import (
 	"fmt"
 	"os"
 	"syscall"
-	"time"
-)
-
-// Windows API 锁相关函数和常量
-var (
-	modkernel32                  = syscall.NewLazyDLL("kernel32.dll")
-	procGetLastError             = modkernel32.NewProc("GetLastError")
-	procGetProcessId             = modkernel32.NewProc("GetProcessId")
 )

 // FileLockChecker 文件锁检查器
@@ -102,37 +94,6 @@ func (c *FileLockChecker) getProcessInfo(path string) (string, error) {
 	return "文件正被其他程序使用", nil
 }

-// CheckFileWithRetry 带重试的文件锁检查
-func (c *FileLockChecker) CheckFileWithRetry(path string, maxRetries int, retryInterval time.Duration) error {
-	for i := 0; i < maxRetries; i++ {
-		locked, processInfo, err := c.IsFileLocked(path)
-		if err != nil && !locked {
-			// 非锁相关的错误，直接返回
-			return err
-		}
-
-		if !locked {
-			// 文件未被锁定，可以操作
-			return nil
-		}
-
-		// 文件被锁定
-		if i < maxRetries-1 {
-			// 还有重试机会，等待后重试
-			time.Sleep(retryInterval)
-			continue
-		}
-
-		// 最后一次重试失败，返回错误
-		if processInfo != "" {
-			return fmt.Errorf("文件被占用: %s", processInfo)
-		}
-		return fmt.Errorf("文件被其他程序占用，请关闭相关程序后重试")
-	}
-
-	return fmt.Errorf("文件检查超时")
-}
-
 // SafeDeleteWithLockCheck 带锁检查的安全删除
 func (c *FileLockChecker) SafeDeleteWithLockCheck(path string) error {
 	// 检查文件是否被锁定
@@ -158,20 +119,6 @@ const (
 	ERROR_SHARING_VIOLATION = 32 // syscall.Errno(32)
 )

-// BY_HANDLE_FILE_INFORMATION 文件信息结构体
-type BY_HANDLE_FILE_INFORMATION struct {
-	FileAttributes     uint32
-	CreationTime       syscall.Filetime
-	LastAccessTime     syscall.Filetime
-	LastWriteTime      syscall.Filetime
-	VolumeSerialNumber uint32
-	FileSizeHigh       uint32
-	FileSizeLow        uint32
-	NumberOfLinks      uint32
-	FileIndexHigh      uint32
-	FileIndexLow       uint32
-}
-
 // contains 检查字符串是否包含子串（不区分大小写）
 func contains(str, substr string) bool {
 	return len(str) >= len(substr) && (str == substr || len(substr) == 0 ||
@@ -203,18 +150,3 @@ func containsIgnoreCase(str, substr string) bool {
 	return false
 }

-// 全局文件锁检查器
-var globalLockChecker *FileLockChecker
-
-// InitFileLockChecker 初始化全局文件锁检查器
-func InitFileLockChecker() {
-	globalLockChecker = NewFileLockChecker()
-}
-
-// GetFileLockChecker 获取全局文件锁检查器
-func GetFileLockChecker() *FileLockChecker {
-	if globalLockChecker == nil {
-		globalLockChecker = NewFileLockChecker()
-	}
-	return globalLockChecker
-}
--- a/internal/filesystem/logger.go
+++ b/internal/filesystem/logger.go
@@ -70,11 +70,6 @@ func (l *Logger) Info(format string, args ...interface{}) {
 	l.log(LogLevelInfo, "INFO", format, args...)
 }

-// Warn 记录警告日志
-func (l *Logger) Warn(format string, args ...interface{}) {
-	l.log(LogLevelWarn, "WARN", format, args...)
-}
-
 // Error 记录错误日志
 func (l *Logger) Error(format string, args ...interface{}) {
 	l.log(LogLevelError, "ERROR", format, args...)
@@ -141,37 +136,10 @@ func LogError(operation string, path string, err error) {

 var (
 	globalLogger *Logger
-	loggerOnce  sync.Once
 )

-// InitLogger 初始化全局日志记录器
-func InitLogger(logDir string, minLevel LogLevel) error {
-	var initErr error
-	loggerOnce.Do(func() {
-		timestamp := time.Now().Format("2006-01-02")
-		logPath := filepath.Join(logDir, fmt.Sprintf("filesystem_%s.log", timestamp))
-
-		logger, err := NewLogger(logPath, minLevel)
-		if err != nil {
-			initErr = err
-			return
-		}
-
-		globalLogger = logger
-		log.Printf("[日志系统] 已启动，日志文件: %s", logPath)
-	})
-	return initErr
-}
-
 // GetGlobalLogger 获取全局日志记录器
 func GetGlobalLogger() *Logger {
 	return globalLogger
 }

-// CloseLogger 关闭全局日志记录器
-func CloseLogger() error {
-	if globalLogger != nil {
-		return globalLogger.Close()
-	}
-	return nil
-}
--- a/internal/filesystem/recycle_bin.go
+++ b/internal/filesystem/recycle_bin.go
@@ -376,16 +376,6 @@ func generateRandomString(length int) string {
 // 全局回收站实例
 var globalRecycleBin *RecycleBin

-// InitRecycleBin 初始化全局回收站
-func InitRecycleBin(binPath string) error {
-	bin, err := NewRecycleBin(binPath)
-	if err != nil {
-		return err
-	}
-	globalRecycleBin = bin
-	return nil
-}
-
 // GetRecycleBin 获取全局回收站实例
 func GetRecycleBin() *RecycleBin {
 	return globalRecycleBin
--- a/internal/filesystem/service.go
+++ b/internal/filesystem/service.go
@@ -119,11 +119,6 @@ func (s *FileSystemService) initRecycleBin() error {

 // ========== 核心文件操作 ==========

-// Read 读取文件内容（实现 FileService 接口）
-func (s *FileSystemService) Read(path string) (string, error) {
-	return s.ReadFile(path)
-}
-
 // ReadFile 读取文件内容（限制最大 10MB）
 func (s *FileSystemService) ReadFile(path string) (string, error) {
 	// 路径验证
@@ -151,10 +146,6 @@ func (s *FileSystemService) ReadFile(path string) (string, error) {
 }

 // Write 写入文件内容（实现 FileService 接口)
-func (s *FileSystemService) Write(path, content string) error {
-	return s.WriteFile(path, content)
-}
-
 // writeFile 内部写入实现（路径验证+大小检查+写入+日志）
 func (s *FileSystemService) writeFileWithLog(path string, data []byte) error {
 	if err := s.validatePath(path); err != nil {
@@ -192,31 +183,6 @@ func (s *FileSystemService) SaveBase64File(path, base64Content string) error {
 	return s.writeFileWithLog(path, data)
 }

-// List 列出目录内容（实现 FileService 接口）
-func (s *FileSystemService) List(path string) ([]map[string]interface{}, error) {
-	return s.ListDir(path)
-}
-
-// Open 打开文件（实现 FileService 接口）
-func (s *FileSystemService) Open(path string) error {
-	// 使用系统默认程序打开文件
-	var cmd *exec.Cmd
-	switch runtime.GOOS {
-	case "windows":
-		cmd = exec.Command("cmd", "/c", "start", "", path)
-	case "darwin":
-		cmd = exec.Command("open", path)
-	default:
-		cmd = exec.Command("xdg-open", path)
-	}
-	return cmd.Start()
-}
-
-// Delete 删除文件或目录（实现 FileService 接口）
-func (s *FileSystemService) Delete(path string) (*FileOperationResult, error) {
-	return s.DeletePathWithContext(context.Background(), path)
-}
-
 // DeletePath 删除文件或目录
 func (s *FileSystemService) DeletePath(path string) (*FileOperationResult, error) {
 	return s.DeletePathWithContext(context.Background(), path)
@@ -430,11 +396,6 @@ func (s *FileSystemService) CreateFile(path string) (*FileOperationResult, error
 	}, nil
 }

-// GetInfo 获取文件信息（实现 FileService 接口）
-func (s *FileSystemService) GetInfo(path string) (map[string]interface{}, error) {
-	return s.GetFileInfo(path)
-}
-
 // GetFileInfo 获取文件信息
 func (s *FileSystemService) GetFileInfo(path string) (map[string]interface{}, error) {
 	if err := s.validatePath(path); err != nil {
@@ -519,31 +480,16 @@ func (s *FileSystemService) RenamePath(oldPath, newPath string) (*FileOperationR

 // ========== ZIP操作接口 ==========

-// ListZip 列出ZIP文件内容
-func (s *FileSystemService) ListZip(zipPath string) ([]map[string]interface{}, error) {
-	return ListZipContents(zipPath)
-}
-
 // ListZipContents 列出ZIP文件内容（别名，保持向后兼容）
 func (s *FileSystemService) ListZipContents(zipPath string) ([]map[string]interface{}, error) {
 	return ListZipContents(zipPath)
 }

-// ExtractZipFile 从ZIP提取文件内容
-func (s *FileSystemService) ExtractZipFile(zipPath, filePath string) (string, error) {
-	return ExtractFileFromZip(zipPath, filePath)
-}
-
 // ExtractFileFromZip 从ZIP提取文件内容（别名，保持向后兼容）
 func (s *FileSystemService) ExtractFileFromZip(zipPath, filePath string) (string, error) {
 	return ExtractFileFromZip(zipPath, filePath)
 }

-// ExtractZipFileToTemp 从ZIP提取文件到临时目录
-func (s *FileSystemService) ExtractZipFileToTemp(zipPath, filePath string) (string, error) {
-	return ExtractFileFromZipToTemp(zipPath, filePath)
-}
-
 // ExtractFileFromZipToTemp 从ZIP提取文件到临时目录（别名，保持向后兼容）
 func (s *FileSystemService) ExtractFileFromZipToTemp(zipPath, filePath string) (string, error) {
 	return ExtractFileFromZipToTemp(zipPath, filePath)
@@ -564,7 +510,9 @@ func getCurrentTimestamp() time.Time {
 // isInRecycleBin 检查路径是否在回收站中
 func isInRecycleBin(path string) bool {
 	recycleBinPath := filepath.Join(common.GetUserDataDir(), "recycle_bin")
-	return filepath.HasPrefix(filepath.Clean(path), filepath.Clean(recycleBinPath))
+	cleanPath := filepath.Clean(path)
+	cleanBinPath := filepath.Clean(recycleBinPath)
+	return len(cleanPath) >= len(cleanBinPath) && cleanPath[:len(cleanBinPath)] == cleanBinPath
 }

 // ========== 辅助方法 ==========
@@ -787,16 +735,3 @@ func GetGlobalService() (*FileSystemService, error) {
 	return globalService, initErr
 }

-// InitGlobalFileSystem 初始化全局文件系统（兼容旧代码）
-func InitGlobalFileSystem() error {
-	_, err := GetGlobalService()
-	return err
-}
-
-// CloseGlobalFileSystem 关闭全局文件系统
-func CloseGlobalFileSystem(ctx context.Context) error {
-	if globalService != nil {
-		return globalService.Close(ctx)
-	}
-	return nil
-}
--- a/internal/filesystem/zip.go
+++ b/internal/filesystem/zip.go
@@ -346,46 +346,4 @@ func GetZipFileInfo(zipPath, filePath string) (map[string]interface{}, error) {
 	return result.(map[string]interface{}), nil
 }

-// validateZipFileBasic 验证ZIP文件的基本信息（提取自ListZipContents）
-func validateZipFileBasic(zipPath string) error {
-	if err := validateZipPath(zipPath); err != nil {
-		return err
-	}
-
-	fileInfo, err := os.Stat(zipPath)
-	if err != nil {
-		return fmt.Errorf("无法访问文件: %v", err)
-	}
-
-	if fileInfo.Size() < MinValidZipSize {
-		return fmt.Errorf("文件太小 (%d bytes)", fileInfo.Size())
-	}
-
-	if fileInfo.Size() > MaxZipSize {
-		return fmt.Errorf("ZIP文件过大 (%d bytes)", fileInfo.Size())
-	}
-
-	return checkZipFileHeader(zipPath)
-}
-
-// checkZipFileHeader 检查ZIP文件头签名
-func checkZipFileHeader(zipPath string) error {
-	file, err := os.Open(zipPath)
-	if err != nil {
-		return fmt.Errorf("无法打开文件: %v", err)
-	}
-	defer file.Close()
-
-	header := make([]byte, 4)
-	n, err := file.Read(header)
-	if err != nil || n != 4 {
-		return fmt.Errorf("无法读取文件头")
-	}
-
-	if header[0] != 0x50 || header[1] != 0x4B {
-		return fmt.Errorf("不是有效的 ZIP 文件")
-	}
-
-	return nil
-}

--- a/internal/filesystem/zip_helper.go
+++ b/internal/filesystem/zip_helper.go
@@ -65,25 +65,6 @@ func isMatchFile(file *zip.File, targetPath string) bool {
 	       filepath.Clean(file.Name) == filepath.Clean(targetPath)
 }

-// openZipFileInReader 在ZIP reader中打开指定文件
-// 用于读取文件内容的辅助函数
-func openZipFileInReader(reader *zip.ReadCloser, filePath string) (io.ReadCloser, *zip.File, error) {
-	for _, file := range reader.File {
-		if isMatchFile(file, filePath) {
-			if file.Mode().IsDir() {
-				return nil, nil, fmt.Errorf("不能读取目录")
-			}
-
-			rc, err := file.Open()
-			if err != nil {
-				return nil, nil, fmt.Errorf("打开 zip 中的文件失败: %v", err)
-			}
-			return rc, file, nil
-		}
-	}
-	return nil, nil, fmt.Errorf("文件在 zip 中不存在: %s", filePath)
-}
-
 // readAllFromFile 从文件读取所有内容
 // 辅助函数，避免重复的 io.ReadAll 调用
 func readAllFromFile(rc io.ReadCloser) ([]byte, error) {
--- a/internal/service/tab_service.go
+++ b/internal/service/tab_service.go
@@ -29,8 +29,3 @@ func (s *TabService) SaveTabs(tabs []models.SqlTab) error {
 func (s *TabService) ListTabs() ([]models.SqlTab, error) {
 	return s.repo.FindAll()
 }
-
-// DeleteTab 删除标签页
-func (s *TabService) DeleteTab(id uint) error {
-	return s.repo.Delete(id)
-}
--- a/internal/service/update_config.go
+++ b/internal/service/update_config.go
@@ -102,22 +102,6 @@ func SaveUpdateConfig(config *UpdateConfig) error {
 	return nil
 }

-// ShouldCheckUpdate 判断是否应该检查更新
-func (c *UpdateConfig) ShouldCheckUpdate() bool {
-	if !c.AutoCheckEnabled {
-		return false
-	}
-
-	// 如果从未检查过，应该检查
-	if c.LastCheckTime.IsZero() {
-		return true
-	}
-
-	// 检查是否超过间隔分钟数
-	minutesSinceLastCheck := time.Since(c.LastCheckTime).Minutes()
-	return minutesSinceLastCheck >= float64(c.CheckIntervalMinutes)
-}
-
 // UpdateLastCheckTime 更新最后检查时间
 func (c *UpdateConfig) UpdateLastCheckTime() error {
 	c.LastCheckTime = time.Now()
--- a/internal/service/version.go
+++ b/internal/service/version.go
@@ -64,11 +64,6 @@ func ParseVersion(versionStr string) (*Version, error) {
 	return &Version{Major: major, Minor: minor, Patch: patch}, nil
 }

-// String 返回版本号字符串（格式：v1.0.0）
-func (v *Version) String() string {
-	return fmt.Sprintf("v%d.%d.%d", v.Major, v.Minor, v.Patch)
-}
-
 // Compare 比较版本号
 // 返回值：-1 表示当前版本小于目标版本，0 表示相等，1 表示大于
 func (v *Version) Compare(other *Version) int {
@@ -100,11 +95,6 @@ func (v *Version) IsNewerThan(other *Version) bool {
 	return v.Compare(other) > 0
 }

-// IsOlderThan 判断是否比目标版本旧
-func (v *Version) IsOlderThan(other *Version) bool {
-	return v.Compare(other) < 0
-}
-
 // ==================== 版本号获取 ====================

 // GetCurrentVersion 获取当前版本号（带缓存）
--- a/internal/storage/connection_service.go
+++ b/internal/storage/connection_service.go
@@ -1,279 +0,0 @@
-package storage
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"u-desk/internal/crypto"
-	"u-desk/internal/dbclient"
-	"u-desk/internal/storage/models"
-
-	"gorm.io/gorm"
-)
-
-// ConnectionService 连接管理服务
-type ConnectionService struct {
-	db *gorm.DB
-}
-
-// NewConnectionService 创建连接服务
-func NewConnectionService() (*ConnectionService, error) {
-	db := GetDB()
-	if db == nil {
-		// 尝试重新初始化
-		var err error
-		db, err = Init()
-		if err != nil {
-			return nil, fmt.Errorf("数据库初始化失败: %v", err)
-		}
-	}
-	return &ConnectionService{db: db}, nil
-}
-
-// SaveConnection 保存连接配置
-func (s *ConnectionService) SaveConnection(conn *models.DbConnection) error {
-	if conn.Name == "" {
-		return fmt.Errorf("连接名称不能为空")
-	}
-	if conn.Type == "" {
-		return fmt.Errorf("数据库类型不能为空")
-	}
-	if conn.Host == "" {
-		return fmt.Errorf("主机地址不能为空")
-	}
-
-	// 检查名称是否重复（排除当前记录）
-	var count int64
-	query := s.db.Model(&models.DbConnection{}).Where("name = ?", conn.Name)
-	if conn.ID > 0 {
-		query = query.Where("id != ?", conn.ID)
-	}
-	query.Count(&count)
-	if count > 0 {
-		return fmt.Errorf("连接名称已存在")
-	}
-
-	if conn.ID > 0 {
-		// 更新模式
-		updateData := map[string]interface{}{
-			"name":              conn.Name,
-			"type":              conn.Type,
-			"host":              conn.Host,
-			"port":              conn.Port,
-			"username":          conn.Username,
-			"database":          conn.Database,
-			"options":           conn.Options,
-			"visible_databases": conn.VisibleDatabases,
-		}
-
-		// 如果提供了新密码，加密后更新
-		if conn.Password != "" {
-			encrypted, err := crypto.EncryptPassword(conn.Password)
-			if err != nil {
-				return fmt.Errorf("密码加密失败: %v", err)
-			}
-			updateData["password"] = encrypted
-		}
-		// 如果密码为空，不更新密码字段（保留原密码）
-
-		return s.db.Model(&models.DbConnection{}).Where("id = ?", conn.ID).Updates(updateData).Error
-	}
-
-	// 新增模式 - 必须提供密码
-	if conn.Password == "" {
-		return fmt.Errorf("新增连接时密码不能为空")
-	}
-
-	// 加密密码
-	encrypted, err := crypto.EncryptPassword(conn.Password)
-	if err != nil {
-		return fmt.Errorf("密码加密失败: %v", err)
-	}
-	conn.Password = encrypted
-
-	return s.db.Create(conn).Error
-}
-
-// ListConnections 获取连接列表
-func (s *ConnectionService) ListConnections() ([]models.DbConnection, error) {
-	var connections []models.DbConnection
-	err := s.db.Order("created_at DESC").Find(&connections).Error
-	return connections, err
-}
-
-// GetConnection 获取连接详情
-func (s *ConnectionService) GetConnection(id uint) (*models.DbConnection, error) {
-	var conn models.DbConnection
-	err := s.db.First(&conn, id).Error
-	if err != nil {
-		return nil, err
-	}
-	return &conn, nil
-}
-
-// DeleteConnection 删除连接配置
-func (s *ConnectionService) DeleteConnection(id uint) error {
-	var conn models.DbConnection
-	if err := s.db.First(&conn, id).Error; err != nil {
-		return nil // 连接不存在视为成功
-	}
-
-	// 使用事务删除
-	return s.db.Transaction(func(tx *gorm.DB) error {
-		// 清理关联数据
-		tx.Where("connection_id = ?", id).Delete(&models.SqlResultHistory{})
-		tx.Where("connection_id = ?", id).Delete(&models.SqlTab{})
-
-		// 删除连接
-		if err := tx.Delete(&conn).Error; err != nil {
-			return err
-		}
-
-		// 关闭连接池
-		dbclient.GetPool().CloseConnection(id, conn.Type)
-		return nil
-	})
-}
-
-// resolvePassword 解析密码（编辑模式下从已保存连接中获取）
-func (s *ConnectionService) resolvePassword(id uint, password string) (string, error) {
-	if id > 0 && password == "" {
-		conn, err := s.GetConnection(id)
-		if err != nil {
-			return "", fmt.Errorf("获取连接信息失败: %v", err)
-		}
-		decryptPassword, err := crypto.DecryptPassword(conn.Password)
-		if err != nil {
-			return "", fmt.Errorf("密码解密失败: %v", err)
-		}
-		return decryptPassword, nil
-	}
-	return password, nil
-}
-
-// parseMongoOptions 解析 MongoDB 连接选项
-func parseMongoOptions(options string) (authSource, authMechanism string) {
-	if options == "" {
-		return "", ""
-	}
-	var opts map[string]interface{}
-	if err := json.Unmarshal([]byte(options), &opts); err != nil {
-		return "", ""
-	}
-	authSource, _ = opts["authSource"].(string)
-	authMechanism, _ = opts["authMechanism"].(string)
-	return authSource, authMechanism
-}
-
-// TestConnection 测试连接（需要根据类型调用不同的测试方法）
-func (s *ConnectionService) TestConnection(conn *models.DbConnection) error {
-	password, err := crypto.DecryptPassword(conn.Password)
-	if err != nil {
-		return fmt.Errorf("密码解密失败: %v", err)
-	}
-
-	authSource, authMechanism := parseMongoOptions(conn.Options)
-
-	return s.testConnectionByType(conn.Type, conn.Host, conn.Port, conn.Username, password, conn.Database, authSource, authMechanism)
-}
-
-// testConnectionByType 根据类型调用对应的测试方法
-func (s *ConnectionService) testConnectionByType(dbType, host string, port int, username, password, database, authSource, authMechanism string) error {
-	switch dbType {
-	case "mysql":
-		return testMySQLConnection(host, port, username, password, database)
-	case "redis":
-		return testRedisConnection(host, port, password)
-	case "mongo":
-		return testMongoConnection(host, port, username, password, database, authSource, authMechanism)
-	default:
-		return fmt.Errorf("不支持的数据库类型: %s", dbType)
-	}
-}
-
-// testMySQLConnection 测试 MySQL 连接
-func testMySQLConnection(host string, port int, username, password, database string) error {
-	return dbclient.TestMySQLConnection(host, port, username, password, database)
-}
-
-// testRedisConnection 测试 Redis 连接
-func testRedisConnection(host string, port int, password string) error {
-	return dbclient.TestRedisConnection(host, port, password)
-}
-
-// testMongoConnection 测试 MongoDB 连接
-func testMongoConnection(host string, port int, username, password, database, authSource, authMechanism string) error {
-	return dbclient.TestMongoConnectionWithOptions(host, port, username, password, database, authSource, authMechanism)
-}
-
-// TestConnectionWithParams 使用参数测试连接（不保存数据）
-func (s *ConnectionService) TestConnectionWithParams(dbType, host string, port int, username, password, database, options string, id uint) error {
-	password, err := s.resolvePassword(id, password)
-	if err != nil {
-		return err
-	}
-
-	authSource, authMechanism := parseMongoOptions(options)
-	return s.testConnectionByType(dbType, host, port, username, password, database, authSource, authMechanism)
-}
-
-// LoadAllDatabases 加载全部数据库列表
-func (s *ConnectionService) LoadAllDatabases(dbType, host string, port int, username, password, database, options string, id uint) ([]string, error) {
-	password, err := s.resolvePassword(id, password)
-	if err != nil {
-		return nil, err
-	}
-
-	authSource, authMechanism := parseMongoOptions(options)
-
-	// 根据类型加载数据库列表
-	switch dbType {
-	case "mysql":
-		return loadMySQLDatabases(host, port, username, password, database)
-	case "mongo":
-		return loadMongoDatabasesWithOptions(host, port, username, password, database, authSource, authMechanism)
-	case "redis":
-		// Redis 没有数据库概念，返回空列表
-		return []string{}, nil
-	default:
-		return nil, fmt.Errorf("不支持的数据库类型: %s", dbType)
-	}
-}
-
-// loadMySQLDatabases 加载 MySQL 数据库列表
-func loadMySQLDatabases(host string, port int, username, password, defaultDatabase string) ([]string, error) {
-	config := &dbclient.MySQLConfig{
-		Host:     host,
-		Port:     port,
-		Username: username,
-		Password: password,
-		Database: defaultDatabase,
-	}
-	client, err := dbclient.NewMySQLClient(config)
-	if err != nil {
-		return nil, err
-	}
-	defer client.Close()
-
-	return client.ListDatabases(context.Background())
-}
-
-// loadMongoDatabasesWithOptions 加载 MongoDB 数据库列表（使用解析后的选项）
-func loadMongoDatabasesWithOptions(host string, port int, username, password, defaultDatabase, authSource, authMechanism string) ([]string, error) {
-	mongoConfig := &dbclient.MongoConfig{
-		Host:          host,
-		Port:          port,
-		Username:      username,
-		Password:      password,
-		Database:      defaultDatabase,
-		AuthSource:    authSource,
-		AuthMechanism: authMechanism,
-	}
-	client, err := dbclient.NewMongoClient(mongoConfig)
-	if err != nil {
-		return nil, err
-	}
-	defer client.Close()
-
-	return client.ListDatabases(context.Background())
-}
--- a/internal/storage/models/file.go
+++ b/internal/storage/models/file.go
@@ -1,20 +0,0 @@
-package models
-
-import (
-	"time"
-)
-
-// SqlFile SQL 文件记录
-type SqlFile struct {
-	ID        uint      `gorm:"primaryKey" json:"id"`
-	Name      string    `gorm:"type:varchar(200);not null" json:"name"`             // 文件名
-	Path      string    `gorm:"type:varchar(500);not null;uniqueIndex" json:"path"` // 文件路径
-	Content   string    `gorm:"type:text" json:"content"`                           // 文件内容
-	CreatedAt time.Time `json:"created_at"`
-	UpdatedAt time.Time `json:"updated_at"`
-}
-
-// TableName 指定表名
-func (SqlFile) TableName() string {
-	return "sql_file"
-}
--- a/internal/storage/models/version.go
+++ b/internal/storage/models/version.go
@@ -1,20 +0,0 @@
-package models
-
-import "time"
-
-// Version 版本信息
-type Version struct {
-	ID          int        `gorm:"primaryKey" json:"id"`                                 // 主键ID
-	Version     string     `gorm:"type:varchar(20);not null;uniqueIndex" json:"version"` // 版本号（语义化版本，如1.0.0）
-	DownloadURL string     `gorm:"type:varchar(500)" json:"download_url"`                // 下载地址（更新包下载URL）
-	Changelog   string     `gorm:"type:text" json:"changelog"`                           // 更新日志（Markdown格式）
-	ForceUpdate int        `gorm:"type:tinyint;not null;default:0" json:"force_update"`  // 是否强制更新（1:是 0:否）
-	ReleaseDate *time.Time `gorm:"type:date" json:"release_date"`                        // 发布日期
-	CreatedAt   time.Time  `gorm:"autoCreateTime:false" json:"created_at"`               // 创建时间（由程序设置）
-	UpdatedAt   time.Time  `gorm:"autoUpdateTime:false" json:"updated_at"`               // 更新时间（由程序设置）
-}
-
-// TableName 指定表名
-func (Version) TableName() string {
-	return "sys_version"
-}
--- a/internal/storage/repository/result_repo.go
+++ b/internal/storage/repository/result_repo.go
@@ -5,17 +5,13 @@ import (
 	"u-desk/internal/storage"
 	"u-desk/internal/storage/models"
 	"gorm.io/gorm"
-	"time"
 )

 type ResultRepository interface {
 	Save(connectionID uint, database, sql string, resultType string, data interface{}, columns []string, rowsAffected int, executionTime int64) (*models.SqlResultHistory, error)
 	FindByID(id uint) (*models.SqlResultHistory, error)
-	FindByConnection(connectionID uint, limit int) ([]models.SqlResultHistory, error)
 	Search(connectionID *uint, keyword string, limit, offset int) ([]models.SqlResultHistory, int64, error)
 	Delete(id uint) error
-	DeleteByConnection(connectionID uint) error
-	DeleteOld(keepDays int) error
 }

 type resultRepository struct {
@@ -61,15 +57,6 @@ func (r *resultRepository) FindByID(id uint) (*models.SqlResultHistory, error) {
 	return &history, err
 }

-func (r *resultRepository) FindByConnection(connectionID uint, limit int) ([]models.SqlResultHistory, error) {
-	var histories []models.SqlResultHistory
-	query := r.db.Where("connection_id = ?", connectionID).Order("created_at DESC")
-	if limit > 0 {
-		query = query.Limit(limit)
-	}
-	return histories, query.Find(&histories).Error
-}
-
 func (r *resultRepository) Search(connectionID *uint, keyword string, limit, offset int) ([]models.SqlResultHistory, int64, error) {
 	query := r.db.Model(&models.SqlResultHistory{})

@@ -101,10 +88,3 @@ func (r *resultRepository) Delete(id uint) error {
 	return r.db.Delete(&models.SqlResultHistory{}, id).Error
 }

-func (r *resultRepository) DeleteByConnection(connectionID uint) error {
-	return r.db.Where("connection_id = ?", connectionID).Delete(&models.SqlResultHistory{}).Error
-}
-
-func (r *resultRepository) DeleteOld(keepDays int) error {
-	return r.db.Where("created_at < ?", time.Now().AddDate(0, 0, -keepDays)).Delete(&models.SqlResultHistory{}).Error
-}
--- a/internal/storage/repository/tab_repo.go
+++ b/internal/storage/repository/tab_repo.go
@@ -10,7 +10,6 @@ type TabRepository interface {
 	SaveAll(tabs []models.SqlTab) error
 	FindAll() ([]models.SqlTab, error)
 	Delete(id uint) error
-	DeleteAll() error
 }

 type tabRepository struct {
@@ -50,6 +49,3 @@ func (r *tabRepository) Delete(id uint) error {
 	return r.db.Delete(&models.SqlTab{}, id).Error
 }

-func (r *tabRepository) DeleteAll() error {
-	return r.db.Where("1=1").Delete(&models.SqlTab{}).Error
-}
--- a/web/src/components/FileSystem/components/FileEditorPanel.vue
+++ b/web/src/components/FileSystem/components/FileEditorPanel.vue
@@ -29,16 +29,22 @@
            {{ config.currentFileName }}
          </span>
        </a-tooltip>
-        <icon-copy
-          class="copy-icon"
-          title="复制路径"
-          @click="handleCopyPath"
-        />
+        <a-tooltip :content="copied ? '已复制' : '复制路径'" position="left">
+          <a-button
+            size="mini"
+            type="text"
+            :status="copied ? 'success' : 'normal'"
+            @click="handleCopyPath"
+          >
+          <icon-copy v-if="!copied" />
+          <icon-check v-else />
+          </a-button>
+        </a-tooltip>
      </div>
      </div>
    </div>

-    <div class="editor-content">
+    <div class="editor-content thin-dark-scrollbar">
      <!-- 二进制文件提示 -->
      <div v-if="config.isBinaryFile" class="binary-file-message">
        <pre>{{ config.fileContent }}</pre>
@@ -271,7 +277,7 @@
        </div>

        <!-- 预览模式 -->
-        <div v-if="!config.isEditMode" ref="markdownPreviewRef" class="markdown-preview-content markdown-content" v-html="config.rendered"></div>
+        <div v-if="!config.isEditMode" ref="markdownPreviewRef" class="markdown-preview-content markdown-content thin-dark-scrollbar" v-html="config.rendered"></div>

        <!-- 编辑模式 -->
        <div v-else class="markdown-edit-wrapper">
@@ -346,8 +352,9 @@
 <script setup lang="ts">
 import { computed, watch, nextTick, defineAsyncComponent, ref, onMounted, onUnmounted } from 'vue'
 import { Message } from '@arco-design/web-vue'
-import { IconSave, IconEdit, IconEye, IconUndo, IconCopy, IconFilePdf, IconFullscreen, IconFullscreenExit } from '@arco-design/web-vue/es/icon'
+import { IconSave, IconEdit, IconEye, IconUndo, IconCopy, IconCheck, IconFilePdf, IconFullscreen, IconFullscreenExit } from '@arco-design/web-vue/es/icon'
 import { getFileName, escapeHtml } from '@/utils/fileUtils'
+import { useClipboardCopy } from '../composables/useClipboardCopy'
 import type { FileEditorPanelConfig } from '@/types/file-system'
 import { renderMermaidDiagrams, rerenderMermaidDiagrams } from '@/utils/markedExtensions'
 import { useThemeStore } from '@/stores/theme'
@@ -730,23 +737,11 @@ const getPreviewButtonTooltip = () => {
  return '切换到预览'
 }

-// 复制文件路径
-const handleCopyPath = () => {
-  const path = props.config.currentFileFullPath
-  if (!path) return
+// 复制文件路径（带状态反馈）
+const { copied, copy: copyPath, cleanup: copyCleanup } = useClipboardCopy()

-  navigator.clipboard.writeText(path).then(() => {
-    Message.success('路径已复制')
-  }).catch(() => {
-    // 降级方案
-    const input = document.createElement('input')
-    input.value = path
-    document.body.appendChild(input)
-    input.select()
-    document.execCommand('copy')
-    document.body.removeChild(input)
-    Message.success('路径已复制')
-  })
+const handleCopyPath = async () => {
+  await copyPath(props.config.currentFileFullPath)
 }

 // 处理 Markdown 预览中的本地文件链接点击
@@ -810,6 +805,7 @@ onUnmounted(() => {
  window.removeEventListener('message', handleHtmlIframeMessage)
  document.removeEventListener('fullscreenchange', onFullscreenChange)
  document.removeEventListener('keydown', onKeyDown)
+  copyCleanup()
 })
 </script>

--- a/web/src/components/FileSystem/components/FileListPanel.vue
+++ b/web/src/components/FileSystem/components/FileListPanel.vue
@@ -55,7 +55,6 @@
        :scroll="{ y: 'auto' }"
        class="file-table"
        @row-click="handleRowClick"
-        @row-dblclick="handleRowDoubleClick"
        @row-contextmenu="handleRowContextMenu"
      />

--- a/web/src/components/FileSystem/components/Toolbar.vue
+++ b/web/src/components/FileSystem/components/Toolbar.vue
@@ -32,10 +32,17 @@
            @navigate="handleGoToPath"
            @openFile="handleOpenFile"
          />
-          <a-tooltip content="复制路径" position="top">
-            <div class="copy-icon-wrapper" @click="handleCopyPath">
-              <icon-copy />
-            </div>
+          <a-tooltip :content="copied ? '已复制' : '复制路径'" position="top">
+            <a-button
+              size="mini"
+              type="text"
+              :status="copied ? 'success' : 'normal'"
+              class="toolbar-copy-btn"
+              @click="handleCopyPath"
+            >
+            <icon-copy v-if="!copied" />
+            <icon-check v-else />
+            </a-button>
          </a-tooltip>
        </div>
      </div>
@@ -109,9 +116,10 @@
 </template>

 <script setup lang="ts">
-import { IconForward, IconHistory, IconRefresh, IconMenu, IconClose, IconRight, IconCopy } from '@arco-design/web-vue/es/icon'
+import { IconForward, IconHistory, IconRefresh, IconMenu, IconClose, IconRight, IconCopy, IconCheck } from '@arco-design/web-vue/es/icon'
 import type { ToolbarConfig } from '@/types/file-system'
 import PathBreadcrumb from './PathBreadcrumb.vue'
+import { useClipboardCopy } from '../composables/useClipboardCopy'

 // Props
 interface Props {
@@ -129,7 +137,6 @@ interface Emits {
  (e: 'goToPath', path: string): void
  (e: 'openFile', path: string): void
  (e: 'navigateToZipDirectory', path: string): void
-  (e: 'showMessage', message: string, type: 'success' | 'error' | 'warning' | 'info'): void
 }

 const emit = defineEmits<Emits>()
@@ -163,22 +170,10 @@ const handleToggleSidebar = () => {
  emit('update:showSidebar', !props.config.showSidebar)
 }

-const handleCopyPath = async () => {
-  const path = props.config.filePath
-  if (!path) return
+const { copied, copy: copyPath } = useClipboardCopy()

-  try {
-    await navigator.clipboard.writeText(path)
-    emit('showMessage', '路径已复制', 'success')
-  } catch {
-    const input = document.createElement('input')
-    input.value = path
-    document.body.appendChild(input)
-    input.select()
-    document.execCommand('copy')
-    document.body.removeChild(input)
-    emit('showMessage', '路径已复制', 'success')
-  }
+const handleCopyPath = async () => {
+  await copyPath(props.config.filePath)
 }
 </script>

@@ -233,22 +228,8 @@ const handleCopyPath = async () => {
  border-color: var(--color-border-2);
 }

-.copy-icon-wrapper {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  padding: 4px 8px;
-  cursor: pointer;
-  color: var(--color-text-3);
-  font-size: 14px;
-  transition: all 0.2s;
-  border-radius: 4px;
-  flex-shrink: 0;
-}
-
-.copy-icon-wrapper:hover {
-  color: rgb(var(--primary-6));
-  background: var(--color-fill-2);
+.toolbar-copy-btn {
+  padding: 2px 4px;
 }

 .zip-breadcrumb {
--- a/web/src/components/FileSystem/composables/useClipboardCopy.ts
+++ b/web/src/components/FileSystem/composables/useClipboardCopy.ts
@@ -0,0 +1,46 @@
+import { ref } from 'vue'
+import { Message } from '@arco-design/web-vue'
+
+/**
+ * 拷贝路径 composable（3-tier fallback: Wails native → clipboard API → execCommand）
+ */
+export function useClipboardCopy() {
+  const copied = ref(false)
+  let copyTimer: ReturnType<typeof setTimeout> | null = null
+
+  const copy = async (path: string) => {
+    if (!path || copied.value) return
+
+    try {
+      if (window.runtime?.ClipboardSetText) {
+        await window.runtime.ClipboardSetText(path)
+      } else {
+        await navigator.clipboard.writeText(path)
+      }
+      copied.value = true
+    } catch {
+      try {
+        const input = document.createElement('input')
+        input.style.position = 'fixed'
+        input.style.opacity = '0'
+        input.value = path
+        document.body.appendChild(input)
+        input.select()
+        document.execCommand('copy')
+        document.body.removeChild(input)
+        copied.value = true
+      } catch {
+        Message.error('复制失败')
+      }
+    }
+
+    if (copyTimer) clearTimeout(copyTimer)
+    copyTimer = setTimeout(() => { copied.value = false }, 2000)
+  }
+
+  const cleanup = () => {
+    if (copyTimer) { clearTimeout(copyTimer); copyTimer = null }
+  }
+
+  return { copied, copy, cleanup }
+}
--- a/web/src/components/MarkdownEditor.vue
+++ b/web/src/components/MarkdownEditor.vue
@@ -154,7 +154,6 @@ export default {
    const isFullscreen = ref(false)
    const isEditorExpanded = ref(false)
    const isPreviewExpanded = ref(false)
-    const showPreview = ref(true)
    const editorWidthPercent = ref(50)
    const editorContentRef = ref(null)
    const previewRef = ref<HTMLElement | null>(null)
@@ -231,13 +230,10 @@ export default {

    // 切换功能
    const togglePreview = () => {
-      showPreview.value = !showPreview.value
-      if (showPreview.value) {
-        // 恢复预览时重新调整大小
-        nextTick(() => {
-          adjustTextareaHeight()
-        })
-      }
+      // 预览面板始终显示，保留快捷键兼容性
+      nextTick(() => {
+        adjustTextareaHeight()
+      })
    }

    const toggleFullscreen = () => {
@@ -323,16 +319,6 @@ export default {
      }
    })

-    // 导出方法
-    const getMarkdownContent = () => {
-      return markdownContent.value
-    }
-
-    const setMarkdownContent = (content) => {
-      markdownContent.value = content
-      hasChanges.value = content !== lastSavedContent.value
-    }
-
    return {
      markdownContent,
      textarea,
@@ -343,13 +329,10 @@ export default {
      isFullscreen,
      isEditorExpanded,
      isPreviewExpanded,
-      showPreview,
      handleInput,
      handleKeydown,
      saveContent,
      onExportComplete,
-      getMarkdownContent,
-      setMarkdownContent,
      togglePreview,
      toggleFullscreen,
      toggleEditorExpand,
--- a/web/src/stores/theme.ts
+++ b/web/src/stores/theme.ts
@@ -16,7 +16,6 @@ export const useThemeStore = defineStore('theme', () => {

  // ==================== 计算属性 ====================
  const isDark = computed(() => theme.value === 'dark')
-  const isLight = computed(() => theme.value === 'light')
  const tooltipText = computed(() =>
    isDark.value ? '切换到亮色主题' : '切换到夜间主题'
  )
@@ -53,20 +52,6 @@ export const useThemeStore = defineStore('theme', () => {
    applyTheme(newTheme)
  }

-  /**
-   * 设置为亮色主题
-   */
-  const setLightTheme = () => {
-    applyTheme('light')
-  }
-
-  /**
-   * 设置为暗色主题
-   */
-  const setDarkTheme = () => {
-    applyTheme('dark')
-  }
-
  /**
   * 初始化主题（应用启动时调用）
   */
@@ -96,16 +81,6 @@ export const useThemeStore = defineStore('theme', () => {
    systemThemeListener = () => mediaQuery.removeEventListener('change', handleChange)
  }

-  /**
-   * 清理系统主题监听器
-   */
-  const removeSystemThemeListener = () => {
-    if (systemThemeListener) {
-      systemThemeListener()
-      systemThemeListener = null
-    }
-  }
-
  // ==================== 返回 ====================
  return {
    // 状态
@@ -113,14 +88,10 @@ export const useThemeStore = defineStore('theme', () => {

    // 计算属性
    isDark,
-    isLight,
    tooltipText,

    // 方法
    toggleTheme,
-    setLightTheme,
-    setDarkTheme,
-    initTheme,
-    removeSystemThemeListener
+    initTheme
  }
 })
--- a/web/src/stores/update.ts
+++ b/web/src/stores/update.ts
@@ -1,6 +1,7 @@
 import { defineStore } from 'pinia'
-import { ref, reactive } from 'vue'
+import { ref } from 'vue'
 import { Message } from '@arco-design/web-vue'
+import { formatBytes as formatFileSize } from '@/utils/fileUtils'

 /**
 * 更新管理 Store
@@ -38,14 +39,6 @@ export const useUpdateStore = defineStore('update', () => {
    }
  }

-  const formatFileSize = (bytes: number): string => {
-    if (!bytes || bytes < 0) return '0 B'
-    const k = 1024
-    const sizes = ['B', 'KB', 'MB', 'GB']
-    const i = Math.floor(Math.log(bytes) / Math.log(k))
-    return Math.round(bytes / Math.pow(k, i) * 100) / 100 + ' ' + sizes[i]
-  }
-
  const formatSpeed = (bytesPerSecond: number): string => {
    return formatFileSize(bytesPerSecond) + '/s'
  }
@@ -211,6 +204,8 @@ export const useUpdateStore = defineStore('update', () => {
    downloadProgress.value = 100
    downloadStatus.value = 'success'

+    const fileSize = (data.file_size as number) || 0
+
    // 系统通知：下载完成
    try {
      window.runtime?.SendNotification?.({
@@ -218,7 +213,6 @@ export const useUpdateStore = defineStore('update', () => {
        body: `更新包下载完成 (${formatFileSize(fileSize)})，正在安装...`
      })
    } catch { /* 通知不可用时忽略 */ }
-    const fileSize = (data.file_size as number) || 0
    progressInfo.value = {
      speed: 0,
      downloaded: fileSize,
@@ -263,13 +257,6 @@ export const useUpdateStore = defineStore('update', () => {
    window.runtime.EventsOff('download-complete')
  }

-  /**
-   * 关闭更新提示
-   */
-  const closeUpdateNotification = () => {
-    showUpdate.value = false
-  }
-
  // ==================== 返回 ====================
  return {
    // 状态
@@ -288,7 +275,6 @@ export const useUpdateStore = defineStore('update', () => {
    installUpdate,
    setupEventListeners,
    removeEventListeners,
-    closeUpdateNotification,
    formatFileSize,
    formatSpeed
  }
--- a/web/src/style.css
+++ b/web/src/style.css
@@ -50,6 +50,29 @@ body {
    scrollbar-color: var(--color-border-2, rgba(0, 0, 0, 0.1)) transparent;
 }

+/* 暗色细滚动条（用于编辑器/预览区） */
+.thin-dark-scrollbar {
+    scrollbar-width: thin;
+    scrollbar-color: var(--color-border-3) transparent;
+}
+
+.thin-dark-scrollbar::-webkit-scrollbar {
+    width: 6px;
+}
+
+.thin-dark-scrollbar::-webkit-scrollbar-track {
+    background: transparent;
+}
+
+.thin-dark-scrollbar::-webkit-scrollbar-thumb {
+    background: var(--color-border-3);
+    border-radius: 3px;
+}
+
+.thin-dark-scrollbar::-webkit-scrollbar-thumb:hover {
+    background: var(--color-border-2);
+}
+
 /* Highlight.js CSS */
 .hljs {
  display: block;
--- a/web/src/utils/codemirrorExports.js
+++ b/web/src/utils/codemirrorExports.js
@@ -4,10 +4,10 @@
 */

 // Core
-export { EditorView, lineNumbers, highlightActiveLineGutter, keymap, drawSelection, dropCursor } from '@codemirror/view'
-export { EditorState, Compartment, Facet, StateEffect, StateField } from '@codemirror/state'
+export { EditorView, lineNumbers, highlightActiveLineGutter, keymap } from '@codemirror/view'
+export { EditorState, Compartment } from '@codemirror/state'
 export { defaultKeymap, history, historyKeymap } from '@codemirror/commands'
-export { bracketMatching, defaultHighlightStyle, syntaxHighlighting, StreamLanguage } from '@codemirror/language'
+export { bracketMatching, defaultHighlightStyle, syntaxHighlighting } from '@codemirror/language'
 export { oneDark } from '@codemirror/theme-one-dark'

 // 语言包通过 codeMirrorLoader 动态导入，避免全量打包
--- a/web/src/utils/constants.js
+++ b/web/src/utils/constants.js
@@ -61,8 +61,6 @@ export const FILE_EXTENSIONS = {
  // 视频文件
  VIDEO_BROWSER: ['mp4', 'webm', 'ogg', 'mov', 'm4v'], // 浏览器原生支持
  VIDEO_EXTERNAL: ['avi', 'mkv', 'wmv', 'flv', 'rmvb', '3gp', 'mts'], // 需要外部播放器（注意：不用 'ts' 避免 TypeScript 冲突）
-  VIDEO: ['mp4', 'webm', 'ogg', 'mov', 'm4v', 'avi', 'mkv', 'wmv', 'flv', 'rmvb', '3gp', 'mts'], // 所有视频
-
  // 音频文件
  AUDIO: ['mp3', 'wav', 'flac', 'aac', 'ogg', 'm4a', 'opus', 'webm'],

@@ -96,9 +94,6 @@ export const FILE_EXTENSIONS = {
  // 纯文本文件
  TEXT: ['txt', 'text', 'log', 'md', 'markdown', 'rst', 'adoc', 'tex', 'msg', 'csv', 'tsv'],

-  // 标记语言文件（用于特殊预览）
-  MARKUP: ['html', 'htm', 'md', 'markdown'],
-
  // 数据库文件
  DATABASE: ['db', 'sqlite', 'mdb', 'accdb'],

--- a/web/src/utils/fileUtils.js
+++ b/web/src/utils/fileUtils.js
@@ -11,7 +11,7 @@ import { FILE_ICON_MAP, FILE_ICONS, BYTE_UNITS, FILE_SIZE_FORMAT } from './const
 * 路径分隔符正则（匹配 Windows 和 Unix 风格）
 * @type {RegExp}
 */
-export const PATH_SEPARATOR_REGEX = /[/\\]/
+const PATH_SEPARATOR_REGEX = /[/\\]/

 /**
 * 规范化路径分隔符（统一为正斜杠）
@@ -93,26 +93,6 @@ export function getFileName(path) {
  return parts[parts.length - 1] || path
 }

-/**
- * 分割路径为多个部分
- * @param {string} path - 文件路径
- * @returns {string[]} 路径数组
- */
-export const splitPath = (path) => {
-  if (!path) return []
-  return path.split(PATH_SEPARATOR_REGEX)
-}
-
-/**
- * 获取文件名（不含扩展名）
- * @param {string} path - 文件路径
- * @returns {string} 文件名（不含扩展名）
- */
-export const getFileNameWithoutExt = (path) => {
-  const fileName = getFileName(path)
-  const lastDot = fileName.lastIndexOf('.')
-  return lastDot > 0 ? fileName.substring(0, lastDot) : fileName
-}

 /**
 * 根据文件信息获取对应的图标
@@ -177,89 +157,6 @@ export function normalizeFilePath(path, encode = false) {
  return normalized
 }

-/**
- * 获取文件类型的友好名称
- * @param {string} path - 文件路径
- * @returns {string} 文件类型名称
- *
- * @example
- * getFileTypeName('image.png') // "PNG图片"
- * getFileTypeName('document.pdf') // "PDF文档"
- * getFileTypeName('unknown.xyz') // "XYZ文件"
- */
-export function getFileTypeName(path) {
-  const ext = getExt(path)
-  const extUpper = ext.toUpperCase()
-
-  // 图片
-  if (['JPG', 'JPEG', 'PNG', 'GIF', 'BMP', 'SVG', 'WEBP'].includes(extUpper)) {
-    return `${extUpper}图片`
-  }
-
-  // 视频
-  if (['MP4', 'WEBM', 'AVI', 'MKV'].includes(extUpper)) {
-    return `${extUpper}视频`
-  }
-
-  // 音频
-  if (['MP3', 'WAV', 'FLAC', 'AAC'].includes(extUpper)) {
-    return `${extUpper}音频`
-  }
-
-  // PDF
-  if (extUpper === 'PDF') {
-    return 'PDF文档'
-  }
-
-  // 文档
-  if (['DOC', 'DOCX', 'XLS', 'XLSX', 'PPT', 'PPTX'].includes(extUpper)) {
-    return `${extUpper}文档`
-  }
-
-  // 代码
-  if (['JS', 'TS', 'PY', 'JAVA', 'GO', 'RS', 'CPP'].includes(extUpper)) {
-    return `${extUpper}代码`
-  }
-
-  // 默认返回扩展名
-  return ext ? `${extUpper}文件` : '文件'
-}
-
-/**
- * 检查路径是否为绝对路径
- * @param {string} path - 文件路径
- * @returns {boolean} 是否为绝对路径
- *
- * @example
- * isAbsolutePath('C:\\Users') // true (Windows)
- * isAbsolutePath('/home/user') // true (Unix)
- * isAbsolutePath('folder/file') // false
- */
-export function isAbsolutePath(path) {
-  if (!path) return false
-
-  // Windows路径：盘符开头
-  if (/^[A-Za-z]:\\/.test(path)) return true
-
-  // Unix路径：以 / 开头
-  if (path.startsWith('/')) return true
-
-  return false
-}
-
-/**
- * 拼接路径片段
- * @param {...string} parts - 路径片段
- * @returns {string} 拼接后的路径
- *
- * @example
- * joinPaths('/home', 'user', 'docs') // "/home/user/docs"
- * joinPaths('C:\\Users', 'user') // "C:\\Users\\user"
- */
-export function joinPaths(...parts) {
-  return parts.join('/').replace(/\/+/g, '/')
-}
-
 /**
 * 获取路径使用的分隔符（Windows 反斜杠或 Unix 正斜杠）
 * @param {string} path - 文件路径
@@ -301,24 +198,6 @@ export function getParentPath(path) {
  return parentPath || '/'
 }

-/**
- * 清理文件名，移除非法字符
- * @param {string} filename - 原始文件名
- * @param {string} [replacement='_'] - 替换字符
- * @returns {string} 清理后的文件名
- *
- * @example
- * sanitizeFileName('file/name.txt') // "file_name.txt"
- * sanitizeFileName('file:name.txt', '-') // "file-name.txt"
- */
-export function sanitizeFileName(filename, replacement = '_') {
-  if (!filename) return ''
-
-  // Windows不允许的字符: < > : " / \ | ? *
-  const illegalChars = /[<>:"/\\|?*]/g
-
-  return filename.replace(illegalChars, replacement)
-}

 /**
 * 文件列表排序：文件夹优先，支持多字段排序
--- a/web/src/views/db-cli/components/ConnectionTree.vue
+++ b/web/src/views/db-cli/components/ConnectionTree.vue
@@ -66,7 +66,6 @@
            :block-node="true"
            :default-expand-all="false"
            :show-line="false"
-            :load-more="handleLoadMore"
            :selected-keys="selectedKeys"
            :expanded-keys="expandedKeys"
            @select="handleTreeSelect"
@@ -586,7 +585,7 @@ const filteredTreeData = computed(() => {
 })

 // 搜索历史管理
-const MAX_HISTORY = 100 // 最多保存10条历史
+const MAX_HISTORY = 100 // 最多保存100条历史

 const saveSearchHistory = (text: string) => {
  if (!text.trim()) return
@@ -694,22 +693,29 @@ const handleTreeSelect = (keys, info) => {

  // 触发节点选择相关事件
  emitNodeSelectEvents(nodeData, conn)
+
+  // 选中连接/数据库时自动展开加载子节点（仅在未加载时触发）
+  if (nodeData.type === 'connection' || nodeData.type === 'database') {
+    if (!expandedKeys.value.includes(key)) {
+      expandedKeys.value = [...expandedKeys.value, key]
+      saveToStorage(STORAGE_KEYS.TREE_EXPANDED_KEYS, expandedKeys.value)
+    }
+    // 仅在子节点未加载时才触发展开加载，避免快速切换时的重复请求
+    if (!nodeData.children || nodeData.children.length === 0) {
+      handleNodeExpand(nodeData, true)
+    }
+  }
 }

 // 树节点展开
 const handleTreeExpand = (keys: string[], info) => {
-  // Arco Design Tree 的 expand 事件参数格式
-  // keys: 展开的节点 key 数组
-  // info: { expanded: boolean, node: TreeNodeData, e: Event }
-  
  // 更新展开状态
  expandedKeys.value = keys
-  
+
  // 保存到localStorage
  saveToStorage(STORAGE_KEYS.TREE_EXPANDED_KEYS, keys)
-  
+
  if (!info || !info.node) {
-    // 如果没有 info.node，尝试从 keys 中获取
    if (keys && keys.length > 0) {
      const lastExpandedKey = keys[keys.length - 1]
      const nodeData = findNodeByKey(treeData.value, lastExpandedKey)
@@ -720,10 +726,10 @@ const handleTreeExpand = (keys: string[], info) => {
    }
    return
  }
-  
+
  const nodeData = info.node
-  const isExpanded = info.expanded !== false // 默认为展开
-  
+  const isExpanded = info.expanded !== false
+
  if (isExpanded) {
    handleNodeExpand(nodeData, true)
  }
@@ -732,14 +738,12 @@ const handleTreeExpand = (keys: string[], info) => {
 // 处理节点展开逻辑
 const handleNodeExpand = (nodeData, isExpanded) => {
  if (!isExpanded) return
-  
+
  if (nodeData.type === 'connection') {
-    // 连接节点：加载数据库列表
    if (!nodeData.children || nodeData.children.length === 0) {
      loadDatabases(nodeData)
    }
  } else if (nodeData.type === 'database') {
-    // 数据库节点：加载表列表
    if (!nodeData.children || nodeData.children.length === 0) {
      loadTables(nodeData)
    }
@@ -759,10 +763,22 @@ const handleLoadMore = (nodeData) => {
  })
 }

-// 通用加载节点数据的错误处理包装器
+// 通用加载节点数据的错误处理包装器（带超时保护）
+const NODE_LOAD_TIMEOUT = 15000 // 15秒超时
+
 const withLoadingNode = async (nodeKey: string, loader: () => Promise<void>) => {
  if (loadingNodes.value.has(nodeKey)) return
  loadingNodes.value.add(nodeKey)
+
+  // 超时保护：防止无限转圈
+  const timer = setTimeout(() => {
+    if (loadingNodes.value.has(nodeKey)) {
+      loadingNodes.value.delete(nodeKey)
+      refreshTreeData()
+      console.warn(`[ConnectionTree] 节点 ${nodeKey} 加载超时 (${NODE_LOAD_TIMEOUT}ms)`)
+    }
+  }, NODE_LOAD_TIMEOUT)
+
  try {
    await loader()
    // 强制触发响应式更新
@@ -772,7 +788,9 @@ const withLoadingNode = async (nodeKey: string, loader: () => Promise<void>) =>
    const loadType = nodeKey.startsWith('conn-') ? 'databases' :
                     nodeKey.startsWith('db-') ? 'tables' : 'keys'
    Message.error(getLoadFailedTip(error, loadType))
+    console.error(`[ConnectionTree] 节点 ${nodeKey} 加载失败:`, error)
  } finally {
+    clearTimeout(timer)
    loadingNodes.value.delete(nodeKey)
  }
 }
--- a/web/src/views/db-cli/components/SqlEditor.vue
+++ b/web/src/views/db-cli/components/SqlEditor.vue
@@ -23,7 +23,6 @@ import {Message} from '@arco-design/web-vue'
 import {
  EditorView, keymap, lineNumbers,
  EditorState,
-  sql, javascript,
  defaultKeymap, history, historyKeymap,
  defaultHighlightStyle, syntaxHighlighting
 } from '@/utils/codemirrorExports'
@@ -55,22 +54,22 @@ const tabPersistence = useTabPersistence()
 // 数据库类型配置
 const DB_CONFIG = {
  mysql: {
-    language: () => sql(),
+    language: async () => (await import('@codemirror/lang-sql')).sql(),
    defaultContent: 'select 1;',
    executeText: '执行'
  },
  redis: {
-    language: () => javascript({ jsx: false, typescript: false }),
+    language: async () => (await import('@codemirror/lang-javascript')).javascript({ jsx: false, typescript: false }),
    defaultContent: 'GET key\nSET key value\nHGET hash field',
    executeText: '执行命令'
  },
  mongo: {
-    language: () => javascript({ jsx: false, typescript: false }),
+    language: async () => (await import('@codemirror/lang-javascript')).javascript({ jsx: false, typescript: false }),
    defaultContent: 'db.collection.find({})\n// 示例：db.users.find({name: "John"})',
    executeText: '执行查询'
  },
  mongodb: {
-    language: () => javascript({ jsx: false, typescript: false }),
+    language: async () => (await import('@codemirror/lang-javascript')).javascript({ jsx: false, typescript: false }),
    defaultContent: 'db.collection.find({})\n// 示例：db.users.find({name: "John"})',
    executeText: '执行查询'
  }
@@ -79,7 +78,7 @@ const DB_CONFIG = {
 // ==================== 工具函数 ====================
 const getDbType = () => props.currentConnection?.type?.toLowerCase() || 'mysql'
 const getDbConfig = (dbType = null) => DB_CONFIG[dbType || getDbType()] || DB_CONFIG.mysql
-const getLanguageMode = (dbType = null) => getDbConfig(dbType).language()
+const getLanguageMode = async (dbType = null) => getDbConfig(dbType).language()
 const getDefaultContent = (dbType = null) => getDbConfig(dbType).defaultContent
 const getExecuteButtonText = () => getDbConfig().executeText

@@ -91,9 +90,9 @@ let saveTimer = null
 const lastExecutionTime = ref(null)

 // 创建编辑器扩展
-const createEditorExtensions = () => {
+const createEditorExtensions = async () => {
  const dbType = getDbType()
-  const languageMode = getLanguageMode(dbType)
+  const languageMode = await getLanguageMode(dbType)
  
  return [
    EditorState.lineSeparator.of('\n'),
@@ -202,7 +201,7 @@ const initEditor = async () => {
  
  const state = EditorState.create({
    doc: initialContent,
-    extensions: createEditorExtensions()
+    extensions: await createEditorExtensions()
  })
  
  editorView = new EditorView({
--- a/web/src/views/db-cli/components/SqlPreviewDialog.vue
+++ b/web/src/views/db-cli/components/SqlPreviewDialog.vue
@@ -20,7 +20,6 @@ import { IconCopy } from '@arco-design/web-vue/es/icon'
 import {
  EditorView, lineNumbers,
  EditorState,
-  sql,
  defaultHighlightStyle, syntaxHighlighting
 } from '@/utils/codemirrorExports'

@@ -68,6 +67,8 @@ const initEditor = async () => {
  // 检测是否为暗色主题
  const isDark = document.body.hasAttribute('arco-theme')
  
+  const { sql } = await import('@codemirror/lang-sql')
+
  const state = EditorState.create({
    doc: sqlText,
    extensions: [
--- a/web/src/views/db-cli/index.vue
+++ b/web/src/views/db-cli/index.vue
@@ -264,7 +264,11 @@ const sqlPreviewInfo = ref<{
 // 编辑器/结果区域高度调整
 const loadEditorAreaHeight = (): number => {
  const saved = localStorage.getItem(STORAGE_KEYS.EDITOR_AREA_HEIGHT)
-  return saved ? Number(saved) : 50
+  if (saved) {
+    const val = Number(saved)
+    if (Number.isFinite(val) && val > 0 && val <= 100) return val
+  }
+  return 50
 }
 const editorAreaHeight = ref(loadEditorAreaHeight())
 const editorAreaPixelHeight = ref<number | null>(null)
@@ -320,7 +324,7 @@ const handleEditorResultDividerMouseDown = (e: MouseEvent) => {

  if (!(mainLayoutEl instanceof HTMLElement)) return

-  const resizeHandler = createResizeHandler(mainLayoutEl, () => editorAreaHeight.value, {
+  const resizeHandler = createResizeHandler(() => mainLayoutEl, () => editorAreaHeight.value, {
    minPercent: 20,
    maxPercent: 80,
    minPixels: 150,
--- a/web/src/views/db-cli/utils/resize.ts
+++ b/web/src/views/db-cli/utils/resize.ts
@@ -1,35 +1,2 @@
-export interface ResizeOptions {
-  minPercent?: number
-  maxPercent?: number
-  minPixels?: number
-  onResize?: (percentage: number) => void
-}
-
-export function createResizeHandler(
-  container: HTMLElement | null,
-  getInitialPercentage: () => number,
-  options: ResizeOptions = {}
-): (e: MouseEvent) => void {
-  const { minPercent = 20, maxPercent = 80, minPixels = 150, onResize } = options
-
-  return (e: MouseEvent) => {
-    if (!container) return
-
-    const handleMouseMove = (moveEvent: MouseEvent) => {
-      if (!container) return
-      const rect = container.getBoundingClientRect()
-      const percentage = ((moveEvent.clientY - rect.top) / rect.height) * 100
-      const minPercentFromPixels = (minPixels / rect.height) * 100
-      const clamped = Math.max(Math.max(minPercent, minPercentFromPixels), Math.min(maxPercent, percentage))
-      onResize?.(clamped)
-    }
-
-    const handleMouseUp = () => {
-      document.removeEventListener('mousemove', handleMouseMove)
-      document.removeEventListener('mouseup', handleMouseUp)
-    }
-
-    document.addEventListener('mousemove', handleMouseMove)
-    document.addEventListener('mouseup', handleMouseUp)
-  }
-}
+// 保留向后兼容，内部使用通用工具
+export { createResizeHandler, type ResizeOptions } from '../../../utils/resize'