fead.文件管理组件加入

LanMountainDesktop/Models/FileSystemItem.cs

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+using System;
+using System.IO;
+
+namespace LanMountainDesktop.Models;
+
+public enum FileSystemItemType
+{
+    Drive,
+    Directory,
+    File
+}
+
+public sealed class FileSystemItem
+{
+    public string Name { get; init; } = string.Empty;
+    public string FullPath { get; init; } = string.Empty;
+    public FileSystemItemType ItemType { get; init; }
+    public long? Size { get; init; }
+    public DateTime? LastModified { get; init; }
+    public string? Extension { get; init; }
+
+    public bool IsDirectory => ItemType == FileSystemItemType.Directory || ItemType == FileSystemItemType.Drive;
+
+    public static FileSystemItem FromDriveInfo(DriveInfo drive)
+    {
+        string name;
+        long? size = null;
+
+        try
+        {
+            var volumeLabel = drive.VolumeLabel;
+            name = string.IsNullOrWhiteSpace(volumeLabel)
+                ? $"{drive.Name.TrimEnd('\\', '/')}"
+                : $"{volumeLabel} ({drive.Name.TrimEnd('\\', '/').ToUpperInvariant()})";
+        }
+        catch
+        {
+            name = $"{drive.Name.TrimEnd('\\', '/')}";
+        }
+
+        try
+        {
+            var totalSize = drive.TotalSize;
+            size = totalSize > 0 ? totalSize : null;
+        }
+        catch
+        {
+            size = null;
+        }
+
+        return new FileSystemItem
+        {
+            Name = name,
+            FullPath = drive.Name,
+            ItemType = FileSystemItemType.Drive,
+            Size = size,
+            LastModified = null,
+            Extension = null
+        };
+    }
+
+    public static FileSystemItem FromDirectoryInfo(DirectoryInfo directory)
+    {
+        return new FileSystemItem
+        {
+            Name = directory.Name,
+            FullPath = directory.FullName,
+            ItemType = FileSystemItemType.Directory,
+            Size = null,
+            LastModified = directory.LastWriteTime,
+            Extension = null
+        };
+    }
+
+    public static FileSystemItem FromFileInfo(FileInfo file)
+    {
+        return new FileSystemItem
+        {
+            Name = file.Name,
+            FullPath = file.FullName,
+            ItemType = FileSystemItemType.File,
+            Size = file.Length,
+            LastModified = file.LastWriteTime,
+            Extension = file.Extension
+        };
+    }
+}