优化：代码质量提升，修复重复逻辑和语法高亮支持

- 简化计算属性，删除重复代码
- 优化文件扩展名获取逻辑
- 新增文件工具函数库 fileHelpers.js
- 增强 CodeEditor 语法高亮（支持 30+ 语言）
- 修复 Office 文档文件服务器访问权限
- 添加特殊文件名支持（Dockerfile、Makefile 等）

internal/common/path.go

@@ -3,43 +3,24 @@ package common
 import (
 	"os"
 	"path/filepath"
-	"runtime"
 )
 
 const (
 	// AppName 应用名称
 	AppName = "u-desk"
+
+	// AppDataDir 应用数据目录名称（带点号，表示隐藏目录）
+	AppDataDir = ".u-desk"
 )
 
 // GetUserDataDir 获取用户数据目录
 // 跨平台支持：Windows、macOS、Linux
+// 所有平台统一使用: ~/.u-desk
 func GetUserDataDir() string {
-	var basePath string
-
-	switch runtime.GOOS {
-	case "windows":
-		// Windows: %LOCALAPPDATA% 或 %APPDATA%
-		basePath = os.Getenv("LOCALAPPDATA")
-		if basePath == "" {
-			basePath = os.Getenv("APPDATA")
-		}
-	case "darwin":
-		// macOS: ~/Library/Application Support
-		homeDir, err := os.UserHomeDir()
-		if err == nil {
-			basePath = filepath.Join(homeDir, "Library", "Application Support")
-		}
-	default:
-		// Linux: ~/.config
-		homeDir, err := os.UserHomeDir()
-		if err == nil {
-			basePath = filepath.Join(homeDir, ".config")
-		}
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return "."
 	}
 
-	if basePath == "" {
-		basePath = "."
-	}
-
-	return filepath.Join(basePath, AppName)
+	return filepath.Join(homeDir, AppDataDir)
 }

internal/filesystem/config.go

@@ -276,7 +276,13 @@ func getAllowedExtensions() map[string]bool {
 		".wav": true,
 		".ogg": true,
 		// 文档
-		".pdf": true,
+		".pdf":  true,
+		".doc":  true,
+		".docx": true,
+		".xls":  true,
+		".xlsx": true,
+		".ppt":  true,
+		".pptx": true,
 		// 文本
 		".txt": true,
 		".md":  true,
@@ -346,10 +352,20 @@ func getMIMETypeMapping() map[string]string {
 		".wav":  "audio/wav",
 		".ogg":  "audio/ogg",
 		".pdf":  "application/pdf",
+		// Office 文档
+		".doc":  "application/msword",
+		".docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+		".xls":  "application/vnd.ms-excel",
+		".xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+		".ppt":  "application/vnd.ms-powerpoint",
+		".pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
+		// 文本
 		".txt":  "text/plain; charset=utf-8",
 		".html": "text/html; charset=utf-8",
 		".css":  "text/css",
 		".js":   "application/javascript",
 		".json": "application/json",
+		".xml":  "application/xml",
+		".md":   "text/markdown",
 	}
 }

internal/service/update.go

@@ -12,6 +12,8 @@ import (
 	"runtime"
 	"strings"
 	"time"
+
+	"u-desk/internal/common"
 )
 
 // ==================== 类型定义 ====================
@@ -409,18 +411,13 @@ func BackupApplication() (string, error) {
 		return "", err
 	}
 
-	homeDir, err := os.UserHomeDir()
-	if err != nil {
-		return "", fmt.Errorf("获取用户目录失败: %v", err)
-	}
-
-	backupDir := filepath.Join(homeDir, ".go-desk", "backups")
+	backupDir := filepath.Join(common.GetUserDataDir(), "backups")
 	if err := os.MkdirAll(backupDir, 0755); err != nil {
 		return "", fmt.Errorf("创建备份目录失败: %v", err)
 	}
 
 	timestamp := time.Now().Format("20060102-150405")
-	backupFileName := fmt.Sprintf("go-desk-backup-%s%s", timestamp, filepath.Ext(execPath))
+	backupFileName := fmt.Sprintf("u-desk-backup-%s%s", timestamp, filepath.Ext(execPath))
 	backupPath := filepath.Join(backupDir, backupFileName)
 
 	if err := copyFile(execPath, backupPath); err != nil {

internal/service/update_config.go

@@ -7,6 +7,8 @@ import (
 	"os"
 	"path/filepath"
 	"time"
+
+	"u-desk/internal/common"
 )
 
 // UpdateConfig 更新配置
@@ -20,17 +22,12 @@ type UpdateConfig struct {
 
 // GetUpdateConfigPath 获取更新配置文件路径
 func GetUpdateConfigPath() (string, error) {
-	homeDir, err := os.UserHomeDir()
-	if err != nil {
-		return "", fmt.Errorf("获取用户目录失败: %v", err)
-	}
-
-	configDir := filepath.Join(homeDir, ".go-desk")
-	if err := os.MkdirAll(configDir, 0755); err != nil {
+	dataDir := common.GetUserDataDir()
+	if err := os.MkdirAll(dataDir, 0755); err != nil {
 		return "", fmt.Errorf("创建配置目录失败: %v", err)
 	}
 
-	return filepath.Join(configDir, "update_config.json"), nil
+	return filepath.Join(dataDir, "update_config.json"), nil
 }
 
 // LoadUpdateConfig 加载更新配置

internal/service/update_download.go

@@ -5,12 +5,15 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
+	"hash"
 	"io"
 	"log"
 	"net/http"
 	"os"
 	"path/filepath"
 	"time"
+
+	"u-desk/internal/common"
 )
 
 // ==================== 类型定义 ====================
@@ -33,12 +36,7 @@ func DownloadUpdate(downloadURL string, progressCallback DownloadProgress) (*Dow
 	log.Printf("[下载] 开始下载，URL: %s", downloadURL)
 
 	// 获取下载目录
-	homeDir, err := os.UserHomeDir()
-	if err != nil {
-		return nil, fmt.Errorf("获取用户目录失败: %v", err)
-	}
-
-	downloadDir := filepath.Join(homeDir, ".go-desk", "downloads")
+	downloadDir := filepath.Join(common.GetUserDataDir(), "downloads")
 	if err := os.MkdirAll(downloadDir, 0755); err != nil {
 		return nil, fmt.Errorf("创建下载目录失败: %v", err)
 	}
@@ -283,7 +281,33 @@ func normalizeProgress(progress float64) float64 {
 	return progress
 }
 
-// calculateFileHashes 计算文件的 MD5 和 SHA256 哈希值
+// calculateHash 计算文件的哈希值（通用函数）
+func calculateHash(filePath string, hashType string) (string, error) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	var hash hash.Hash
+
+	switch hashType {
+	case "md5":
+		hash = md5.New()
+	case "sha256":
+		hash = sha256.New()
+	default:
+		return "", fmt.Errorf("不支持的哈希类型: %s", hashType)
+	}
+
+	if _, err := io.Copy(hash, file); err != nil {
+		return "", err
+	}
+
+	return hex.EncodeToString(hash.Sum(nil)), nil
+}
+
+// calculateFileHashes 计算文件的 MD5 和 SHA256 哈希值（优化版，使用 MultiWriter）
 func calculateFileHashes(filePath string) (string, string, error) {
 	file, err := os.Open(filePath)
 	if err != nil {
@@ -294,7 +318,7 @@ func calculateFileHashes(filePath string) (string, string, error) {
 	md5Hash := md5.New()
 	sha256Hash := sha256.New()
 
-	// 使用 MultiWriter 同时计算两个哈希
+	// 使用 MultiWriter 同时计算两个哈希，只读取文件一次
 	writer := io.MultiWriter(md5Hash, sha256Hash)
 
 	if _, err := io.Copy(writer, file); err != nil {
@@ -309,33 +333,9 @@ func calculateFileHashes(filePath string) (string, string, error) {
 
 // VerifyFileHash 验证文件哈希值
 func VerifyFileHash(filePath string, expectedHash string, hashType string) (bool, error) {
-	file, err := os.Open(filePath)
+	calculatedHash, err := calculateHash(filePath, hashType)
 	if err != nil {
 		return false, err
 	}
-	defer file.Close()
-
-	var hash []byte
-	var calculatedHash string
-
-	switch hashType {
-	case "md5":
-		md5Hash := md5.New()
-		if _, err := io.Copy(md5Hash, file); err != nil {
-			return false, err
-		}
-		hash = md5Hash.Sum(nil)
-		calculatedHash = hex.EncodeToString(hash)
-	case "sha256":
-		sha256Hash := sha256.New()
-		if _, err := io.Copy(sha256Hash, file); err != nil {
-			return false, err
-		}
-		hash = sha256Hash.Sum(nil)
-		calculatedHash = hex.EncodeToString(hash)
-	default:
-		return false, fmt.Errorf("不支持的哈希类型: %s", hashType)
-	}
-
 	return calculatedHash == expectedHash, nil
 }

internal/storage/sqlite.go

@@ -1,6 +1,8 @@
 package storage
 
 import (
+	"fmt"
+	"u-desk/internal/common"
 	"u-desk/internal/storage/models"
 	"os"
 	"path/filepath"
@@ -25,17 +27,13 @@ func InitFast() (*gorm.DB, error) {
 		return globalDB, nil
 	}
 
-	homeDir, err := os.UserHomeDir()
-	if err != nil {
-		return nil, err
-	}
-
-	dataDir := filepath.Join(homeDir, ".go-desk")
+	// 使用统一的数据目录
+	dataDir := common.GetUserDataDir()
 	if err := os.MkdirAll(dataDir, 0755); err != nil {
 		return nil, err
 	}
 
-	dbPath := filepath.Join(dataDir, "db-cli.db")
+	dbPath := filepath.Join(dataDir, "app.db")
 
 	// 极限性能优化参数：
 	// - journal_mode=WAL: 写前日志，大幅提升并发性能
@@ -53,7 +51,10 @@ func InitFast() (*gorm.DB, error) {
 		return nil, err
 	}
 
-	sqlDB, _ := db.DB()
+	sqlDB, err := db.DB()
+	if err != nil {
+		return nil, fmt.Errorf("获取底层SQL数据库失败: %v", err)
+	}
 	sqlDB.SetMaxOpenConns(1) // SQLite 只需要一个连接
 	sqlDB.SetMaxIdleConns(1)
 	sqlDB.SetConnMaxLifetime(time.Hour)