修复：常用系统路径获取，支持桌面文档等快捷访问

app.go

@@ -9,6 +9,7 @@ import (
 	"go-desk/internal/storage"
 	"go-desk/internal/system"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"github.com/wailsapp/wails/v2/pkg/runtime"
@@ -132,6 +133,23 @@ func (a *App) GetEnvVars() (map[string]string, error) {
 	return envVars, nil
 }
 
+// GetCommonPaths 获取常用系统路径
+func (a *App) GetCommonPaths() (map[string]string, error) {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return nil, err
+	}
+
+	return map[string]string{
+		"home":     homeDir,
+		"desktop":  filepath.Join(homeDir, "Desktop"),
+		"documents": filepath.Join(homeDir, "Documents"),
+		"downloads": filepath.Join(homeDir, "Downloads"),
+		"root_c":   "C:\\",
+		"root_d":   "D:\\",
+	}, nil
+}
+
 // ========== 数据库连接管理接口 ==========
 
 // initAPIs 初始化所有API（在startup中调用）