feat.依旧试增量更新这一块，看看velopack

LanMountainDesktop/Services/Loading/LoadingStateManager.cs

@@ -0,0 +1,380 @@
+using System.Collections.Concurrent;
+using LanMountainDesktop.Shared.Contracts.Launcher;
+
+namespace LanMountainDesktop.Services.Loading;
+
+/// <summary>
+/// 加载状态管理器 - 管理所有加载项的状态
+/// </summary>
+public class LoadingStateManager : IDisposable
+{
+    private readonly ConcurrentDictionary<string, LoadingItem> _items = new();
+    private readonly ConcurrentDictionary<string, DateTimeOffset> _startTimes = new();
+    private readonly object _lock = new();
+    private readonly CancellationTokenSource _cts = new();
+    
+    /// <summary>
+    /// 状态变更事件
+    /// </summary>
+    public event EventHandler<LoadingStateChangedEventArgs>? StateChanged;
+    
+    /// <summary>
+    /// 整体进度变更事件
+    /// </summary>
+    public event EventHandler<OverallProgressChangedEventArgs>? OverallProgressChanged;
+    
+    /// <summary>
+    /// 当前启动阶段
+    /// </summary>
+    public StartupStage CurrentStage { get; private set; } = StartupStage.Initializing;
+    
+    /// <summary>
+    /// 整体进度百分比
+    /// </summary>
+    public int OverallProgressPercent { get; private set; }
+    
+    /// <summary>
+    /// 是否正在加载
+    /// </summary>
+    public bool IsLoading => _items.Values.Any(i => i.State == LoadingState.InProgress);
+    
+    /// <summary>
+    /// 是否有错误
+    /// </summary>
+    public bool HasErrors => _items.Values.Any(i => i.State == LoadingState.Failed);
+    
+    /// <summary>
+    /// 获取所有加载项
+    /// </summary>
+    public IReadOnlyCollection<LoadingItem> GetAllItems() => _items.Values.ToList();
+    
+    /// <summary>
+    /// 获取活动的加载项
+    /// </summary>
+    public IReadOnlyCollection<LoadingItem> GetActiveItems() => 
+        _items.Values.Where(i => i.State is LoadingState.InProgress or LoadingState.Pending).ToList();
+    
+    /// <summary>
+    /// 注册加载项
+    /// </summary>
+    public LoadingItem RegisterItem(
+        string id, 
+        LoadingItemType type, 
+        string name, 
+        string? description = null,
+        Dictionary<string, string>? metadata = null)
+    {
+        var item = new LoadingItem
+        {
+            Id = id,
+            Type = type,
+            Name = name,
+            Description = description,
+            State = LoadingState.Pending,
+            ProgressPercent = 0,
+            Metadata = metadata,
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        _items[id] = item;
+        
+        StateChanged?.Invoke(this, new LoadingStateChangedEventArgs 
+        { 
+            Item = item, 
+            PreviousState = null, 
+            CurrentState = item.State 
+        });
+        
+        return item;
+    }
+    
+    /// <summary>
+    /// 开始加载
+    /// </summary>
+    public void StartItem(string id, string? message = null)
+    {
+        if (!_items.TryGetValue(id, out var item))
+            return;
+        
+        var previousState = item.State;
+        var startTime = DateTimeOffset.UtcNow;
+        
+        _startTimes[id] = startTime;
+        
+        var updatedItem = item with
+        {
+            State = LoadingState.InProgress,
+            StartTime = startTime,
+            Message = message ?? $"正在加载 {item.Name}...",
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        _items[id] = updatedItem;
+        
+        StateChanged?.Invoke(this, new LoadingStateChangedEventArgs 
+        { 
+            Item = updatedItem, 
+            PreviousState = previousState, 
+            CurrentState = updatedItem.State 
+        });
+        
+        UpdateOverallProgress();
+    }
+    
+    /// <summary>
+    /// 更新进度
+    /// </summary>
+    public void UpdateProgress(string id, int percent, string? message = null, int? estimatedRemainingSeconds = null)
+    {
+        if (!_items.TryGetValue(id, out var item))
+            return;
+        
+        var updatedItem = item with
+        {
+            ProgressPercent = Math.Clamp(percent, 0, 100),
+            Message = message ?? item.Message,
+            EstimatedRemainingSeconds = estimatedRemainingSeconds,
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        _items[id] = updatedItem;
+        
+        StateChanged?.Invoke(this, new LoadingStateChangedEventArgs 
+        { 
+            Item = updatedItem, 
+            PreviousState = item.State, 
+            CurrentState = updatedItem.State,
+            IsProgressUpdate = true
+        });
+        
+        UpdateOverallProgress();
+    }
+    
+    /// <summary>
+    /// 完成加载
+    /// </summary>
+    public void CompleteItem(string id, string? message = null)
+    {
+        if (!_items.TryGetValue(id, out var item))
+            return;
+        
+        var previousState = item.State;
+        var endTime = DateTimeOffset.UtcNow;
+        
+        _startTimes.TryRemove(id, out _);
+        
+        var updatedItem = item with
+        {
+            State = LoadingState.Completed,
+            ProgressPercent = 100,
+            EndTime = endTime,
+            Message = message ?? $"{item.Name} 加载完成",
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        _items[id] = updatedItem;
+        
+        StateChanged?.Invoke(this, new LoadingStateChangedEventArgs 
+        { 
+            Item = updatedItem, 
+            PreviousState = previousState, 
+            CurrentState = updatedItem.State 
+        });
+        
+        UpdateOverallProgress();
+    }
+    
+    /// <summary>
+    /// 标记失败
+    /// </summary>
+    public void FailItem(string id, string errorMessage, string? details = null)
+    {
+        if (!_items.TryGetValue(id, out var item))
+            return;
+        
+        var previousState = item.State;
+        var endTime = DateTimeOffset.UtcNow;
+        
+        _startTimes.TryRemove(id, out _);
+        
+        var fullErrorMessage = string.IsNullOrEmpty(details) 
+            ? errorMessage 
+            : $"{errorMessage}: {details}";
+        
+        var updatedItem = item with
+        {
+            State = LoadingState.Failed,
+            ErrorMessage = fullErrorMessage,
+            EndTime = endTime,
+            Message = $"{item.Name} 加载失败",
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        _items[id] = updatedItem;
+        
+        StateChanged?.Invoke(this, new LoadingStateChangedEventArgs 
+        { 
+            Item = updatedItem, 
+            PreviousState = previousState, 
+            CurrentState = updatedItem.State 
+        });
+        
+        UpdateOverallProgress();
+    }
+    
+    /// <summary>
+    /// 标记超时
+    /// </summary>
+    public void TimeoutItem(string id, string? message = null)
+    {
+        if (!_items.TryGetValue(id, out var item))
+            return;
+        
+        var previousState = item.State;
+        var endTime = DateTimeOffset.UtcNow;
+        
+        _startTimes.TryRemove(id, out _);
+        
+        var updatedItem = item with
+        {
+            State = LoadingState.Timeout,
+            EndTime = endTime,
+            Message = message ?? $"{item.Name} 加载超时",
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        _items[id] = updatedItem;
+        
+        StateChanged?.Invoke(this, new LoadingStateChangedEventArgs 
+        { 
+            Item = updatedItem, 
+            PreviousState = previousState, 
+            CurrentState = updatedItem.State 
+        });
+        
+        UpdateOverallProgress();
+    }
+    
+    /// <summary>
+    /// 设置当前启动阶段
+    /// </summary>
+    public void SetStage(StartupStage stage, string? message = null)
+    {
+        CurrentStage = stage;
+        
+        OverallProgressChanged?.Invoke(this, new OverallProgressChangedEventArgs
+        {
+            Stage = stage,
+            OverallProgressPercent = OverallProgressPercent,
+            Message = message
+        });
+    }
+    
+    /// <summary>
+    /// 更新整体进度
+    /// </summary>
+    private void UpdateOverallProgress()
+    {
+        lock (_lock)
+        {
+            var items = _items.Values.ToList();
+            if (items.Count == 0)
+            {
+                OverallProgressPercent = 0;
+                return;
+            }
+            
+            // 计算加权进度
+            var totalWeight = items.Count;
+            var completedWeight = items.Count(i => i.State == LoadingState.Completed);
+            var inProgressWeight = items
+                .Where(i => i.State == LoadingState.InProgress)
+                .Sum(i => i.ProgressPercent / 100.0);
+            
+            var progress = (int)((completedWeight + inProgressWeight) / totalWeight * 100);
+            OverallProgressPercent = Math.Clamp(progress, 0, 100);
+            
+            OverallProgressChanged?.Invoke(this, new OverallProgressChangedEventArgs
+            {
+                Stage = CurrentStage,
+                OverallProgressPercent = OverallProgressPercent
+            });
+        }
+    }
+    
+    /// <summary>
+    /// 获取加载状态消息
+    /// </summary>
+    public LoadingStateMessage GetLoadingStateMessage()
+    {
+        var items = _items.Values.ToList();
+        var activeItems = items.Where(i => i.State is LoadingState.InProgress or LoadingState.Pending).ToList();
+        var errorItems = items.Where(i => i.State == LoadingState.Failed).ToList();
+        
+        return new LoadingStateMessage
+        {
+            Stage = CurrentStage,
+            OverallProgressPercent = OverallProgressPercent,
+            ActiveItems = activeItems,
+            CompletedCount = items.Count(i => i.State == LoadingState.Completed),
+            TotalCount = items.Count,
+            HasErrors = errorItems.Any(),
+            ErrorMessages = errorItems.Select(i => $"{i.Name}: {i.ErrorMessage}").ToList()
+        };
+    }
+    
+    /// <summary>
+    /// 清理所有加载项
+    /// </summary>
+    public void Clear()
+    {
+        _items.Clear();
+        _startTimes.Clear();
+        OverallProgressPercent = 0;
+    }
+    
+    /// <summary>
+    /// 检查超时项
+    /// </summary>
+    public void CheckTimeouts(TimeSpan timeout)
+    {
+        var now = DateTimeOffset.UtcNow;
+        var timeoutItems = _items.Values
+            .Where(i => i.State == LoadingState.InProgress && i.StartTime.HasValue)
+            .Where(i => now - i.StartTime.Value > timeout)
+            .ToList();
+        
+        foreach (var item in timeoutItems)
+        {
+            TimeoutItem(item.Id, $"{item.Name} 加载超时（超过 {timeout.TotalSeconds} 秒）");
+        }
+    }
+    
+    public void Dispose()
+    {
+        _cts.Cancel();
+        _items.Clear();
+        _startTimes.Clear();
+    }
+}
+
+/// <summary>
+/// 加载状态变更事件参数
+/// </summary>
+public class LoadingStateChangedEventArgs : EventArgs
+{
+    public required LoadingItem Item { get; init; }
+    public LoadingState? PreviousState { get; init; }
+    public required LoadingState CurrentState { get; init; }
+    public bool IsProgressUpdate { get; init; }
+}
+
+/// <summary>
+/// 整体进度变更事件参数
+/// </summary>
+public class OverallProgressChangedEventArgs : EventArgs
+{
+    public StartupStage Stage { get; init; }
+    public int OverallProgressPercent { get; init; }
+    public string? Message { get; init; }
+}

LanMountainDesktop/Services/Loading/LoadingStateReporter.cs

@@ -0,0 +1,360 @@
+using System.Timers;
+using LanMountainDesktop.Services.Launcher;
+using LanMountainDesktop.Shared.Contracts.Launcher;
+
+namespace LanMountainDesktop.Services.Loading;
+
+/// <summary>
+/// 加载状态上报器 - 将加载状态实时上报给 Launcher
+/// </summary>
+public class LoadingStateReporter : IDisposable
+{
+    private readonly LoadingStateManager _manager;
+    private readonly LauncherIpcClient? _ipcClient;
+    private readonly System.Timers.Timer _reportTimer;
+    private readonly object _lock = new();
+    private bool _isDisposed;
+    
+    /// <summary>
+    /// 上报间隔（毫秒）
+    /// </summary>
+    public int ReportIntervalMs { get; set; } = 100;
+    
+    /// <summary>
+    /// 是否启用批量上报优化
+    /// </summary>
+    public bool EnableBatching { get; set; } = true;
+    
+    /// <summary>
+    /// 最小上报间隔（毫秒），用于限制高频更新
+    /// </summary>
+    public int MinReportIntervalMs { get; set; } = 50;
+    
+    private DateTimeOffset _lastReportTime = DateTimeOffset.MinValue;
+    private DetailedProgressMessage? _pendingMessage;
+    private bool _hasPendingMessage;
+
+    public LoadingStateReporter(
+        LoadingStateManager manager, 
+        LauncherIpcClient? ipcClient = null)
+    {
+        _manager = manager ?? throw new ArgumentNullException(nameof(manager));
+        _ipcClient = ipcClient;
+        
+        // 创建定时上报定时器
+        _reportTimer = new System.Timers.Timer(ReportIntervalMs);
+        _reportTimer.Elapsed += OnReportTimerElapsed;
+        _reportTimer.AutoReset = true;
+        
+        // 订阅状态变更事件
+        _manager.StateChanged += OnStateChanged;
+        _manager.OverallProgressChanged += OnOverallProgressChanged;
+    }
+
+    /// <summary>
+    /// 启动上报
+    /// </summary>
+    public void Start()
+    {
+        if (_isDisposed) return;
+        
+        _reportTimer.Start();
+        AppLogger.Info("LoadingStateReporter", "Loading state reporter started");
+    }
+
+    /// <summary>
+    /// 停止上报
+    /// </summary>
+    public void Stop()
+    {
+        _reportTimer.Stop();
+        
+        // 发送任何待处理的消息
+        FlushPendingMessage();
+        
+        AppLogger.Info("LoadingStateReporter", "Loading state reporter stopped");
+    }
+
+    /// <summary>
+    /// 立即上报当前状态
+    /// </summary>
+    public async Task ReportImmediatelyAsync()
+    {
+        if (_isDisposed || _ipcClient == null) return;
+        
+        var message = CreateDetailedProgressMessage();
+        await SendMessageAsync(message);
+    }
+
+    /// <summary>
+    /// 上报单个加载项的进度
+    /// </summary>
+    public async Task ReportItemProgressAsync(string itemId, int percent, string? message = null)
+    {
+        if (_isDisposed || _ipcClient == null) return;
+        
+        var item = _manager.GetAllItems().FirstOrDefault(i => i.Id == itemId);
+        if (item == null) return;
+        
+        var updatedItem = item with
+        {
+            ProgressPercent = percent,
+            Message = message ?? item.Message,
+            Timestamp = DateTimeOffset.UtcNow
+        };
+        
+        var progressMessage = new DetailedProgressMessage
+        {
+            Stage = _manager.CurrentStage,
+            ProgressPercent = _manager.OverallProgressPercent,
+            CurrentItem = updatedItem,
+            AllItems = _manager.GetAllItems().ToList(),
+            Message = message,
+            IsMajorUpdate = false
+        };
+        
+        await SendMessageAsync(progressMessage);
+    }
+
+    /// <summary>
+    /// 上报阶段变更
+    /// </summary>
+    public async Task ReportStageChangeAsync(StartupStage stage, string? message = null)
+    {
+        if (_isDisposed || _ipcClient == null) return;
+        
+        var progressMessage = new DetailedProgressMessage
+        {
+            Stage = stage,
+            ProgressPercent = _manager.OverallProgressPercent,
+            AllItems = _manager.GetAllItems().ToList(),
+            Message = message ?? $"进入阶段: {stage}",
+            IsMajorUpdate = true
+        };
+        
+        await SendMessageAsync(progressMessage);
+    }
+
+    /// <summary>
+    /// 上报错误
+    /// </summary>
+    public async Task ReportErrorAsync(string errorMessage, string? details = null)
+    {
+        if (_isDisposed || _ipcClient == null) return;
+        
+        var fullMessage = string.IsNullOrEmpty(details) 
+            ? errorMessage 
+            : $"{errorMessage}: {details}";
+        
+        var progressMessage = new DetailedProgressMessage
+        {
+            Stage = _manager.CurrentStage,
+            ProgressPercent = _manager.OverallProgressPercent,
+            AllItems = _manager.GetAllItems().ToList(),
+            Message = fullMessage,
+            IsMajorUpdate = true
+        };
+        
+        await SendMessageAsync(progressMessage);
+    }
+
+    /// <summary>
+    /// 状态变更事件处理
+    /// </summary>
+    private void OnStateChanged(object? sender, LoadingStateChangedEventArgs e)
+    {
+        if (_isDisposed) return;
+        
+        // 重要状态变更立即上报
+        if (e.CurrentState is LoadingState.Completed or LoadingState.Failed or LoadingState.Timeout)
+        {
+            _ = Task.Run(async () =>
+            {
+                try
+                {
+                    await ReportImmediatelyAsync();
+                }
+                catch (Exception ex)
+                {
+                    AppLogger.Warn("LoadingStateReporter", $"Failed to report state change: {ex.Message}");
+                }
+            });
+        }
+        else
+        {
+            // 其他状态变更标记为待处理
+            QueueMessage(CreateDetailedProgressMessage());
+        }
+    }
+
+    /// <summary>
+    /// 整体进度变更事件处理
+    /// </summary>
+    private void OnOverallProgressChanged(object? sender, OverallProgressChangedEventArgs e)
+    {
+        if (_isDisposed) return;
+        
+        QueueMessage(CreateDetailedProgressMessage(e.Message));
+    }
+
+    /// <summary>
+    /// 定时上报处理
+    /// </summary>
+    private void OnReportTimerElapsed(object? sender, ElapsedEventArgs e)
+    {
+        FlushPendingMessage();
+    }
+
+    /// <summary>
+    /// 将消息加入待处理队列
+    /// </summary>
+    private void QueueMessage(DetailedProgressMessage message)
+    {
+        if (!EnableBatching)
+        {
+            // 如果不启用批量，立即发送
+            _ = Task.Run(async () => await SendMessageAsync(message));
+            return;
+        }
+        
+        lock (_lock)
+        {
+            _pendingMessage = message;
+            _hasPendingMessage = true;
+        }
+    }
+
+    /// <summary>
+    /// 刷新待处理消息
+    /// </summary>
+    private void FlushPendingMessage()
+    {
+        DetailedProgressMessage? message;
+        
+        lock (_lock)
+        {
+            if (!_hasPendingMessage) return;
+            
+            message = _pendingMessage;
+            _pendingMessage = null;
+            _hasPendingMessage = false;
+        }
+        
+        if (message != null)
+        {
+            _ = Task.Run(async () =>
+            {
+                try
+                {
+                    await SendMessageAsync(message);
+                }
+                catch (Exception ex)
+                {
+                    AppLogger.Warn("LoadingStateReporter", $"Failed to flush pending message: {ex.Message}");
+                }
+            });
+        }
+    }
+
+    /// <summary>
+    /// 创建详细的进度消息
+    /// </summary>
+    private DetailedProgressMessage CreateDetailedProgressMessage(string? message = null)
+    {
+        var activeItems = _manager.GetActiveItems().ToList();
+        var currentItem = activeItems.FirstOrDefault();
+        
+        return new DetailedProgressMessage
+        {
+            Stage = _manager.CurrentStage,
+            ProgressPercent = _manager.OverallProgressPercent,
+            CurrentItem = currentItem,
+            AllItems = _manager.GetAllItems().ToList(),
+            Message = message ?? currentItem?.Message,
+            IsMajorUpdate = false
+        };
+    }
+
+    /// <summary>
+    /// 发送消息
+    /// </summary>
+    private async Task SendMessageAsync(DetailedProgressMessage message)
+    {
+        if (_ipcClient == null) return;
+        
+        // 检查最小上报间隔
+        var now = DateTimeOffset.UtcNow;
+        var elapsed = now - _lastReportTime;
+        if (elapsed.TotalMilliseconds < MinReportIntervalMs)
+        {
+            await Task.Delay(MinReportIntervalMs - (int)elapsed.TotalMilliseconds);
+        }
+        
+        try
+        {
+            // 转换为 StartupProgressMessage 以保持兼容性
+            var baseMessage = new StartupProgressMessage
+            {
+                Stage = message.Stage,
+                ProgressPercent = message.ProgressPercent,
+                Message = FormatMessage(message),
+                Timestamp = DateTimeOffset.UtcNow
+            };
+            
+            await _ipcClient.ReportProgressAsync(baseMessage);
+            _lastReportTime = DateTimeOffset.UtcNow;
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LoadingStateReporter", $"Failed to send message: {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 格式化消息
+    /// </summary>
+    private string FormatMessage(DetailedProgressMessage message)
+    {
+        var parts = new List<string>();
+        
+        if (message.CurrentItem != null)
+        {
+            parts.Add($"[{message.CurrentItem.Type}] {message.CurrentItem.Name}");
+            
+            if (message.CurrentItem.ProgressPercent > 0)
+            {
+                parts.Add($"{message.CurrentItem.ProgressPercent}%");
+            }
+        }
+        
+        if (!string.IsNullOrEmpty(message.Message))
+        {
+            parts.Add(message.Message);
+        }
+        
+        var completedCount = message.AllItems?.Count(i => i.State == LoadingState.Completed) ?? 0;
+        var totalCount = message.AllItems?.Count ?? 0;
+        
+        if (totalCount > 0)
+        {
+            parts.Add($"({completedCount}/{totalCount})");
+        }
+        
+        return string.Join(" - ", parts);
+    }
+
+    public void Dispose()
+    {
+        if (_isDisposed) return;
+        
+        _isDisposed = true;
+        
+        Stop();
+        
+        _reportTimer.Elapsed -= OnReportTimerElapsed;
+        _reportTimer.Dispose();
+        
+        _manager.StateChanged -= OnStateChanged;
+        _manager.OverallProgressChanged -= OnOverallProgressChanged;
+    }
+}

LanMountainDesktop/Services/Loading/LoadingStateUsageExample.cs

@@ -0,0 +1,201 @@
+using LanMountainDesktop.Shared.Contracts.Launcher;
+
+namespace LanMountainDesktop.Services.Loading;
+
+/// <summary>
+/// 加载状态管理使用示例
+/// </summary>
+public static class LoadingStateUsageExample
+{
+    /// <summary>
+    /// 示例：插件加载
+    /// </summary>
+    public static async Task LoadPluginsExample(LoadingStateManager manager)
+    {
+        // 注册插件加载项
+        var pluginItem = manager.RegisterItem(
+            "plugins.core",
+            LoadingItemType.Plugin,
+            "核心插件",
+            "加载系统核心插件",
+            new Dictionary<string, string> { { "version", "1.0.0" } });
+
+        // 开始加载
+        manager.StartItem("plugins.core", "正在下载插件...");
+
+        try
+        {
+            // 模拟下载进度
+            for (int i = 0; i <= 100; i += 10)
+            {
+                manager.UpdateProgress(
+                    "plugins.core",
+                    i,
+                    $"正在下载... {i}%",
+                    estimatedRemainingSeconds: (100 - i) / 10);
+
+                await Task.Delay(100);
+            }
+
+            // 完成加载
+            manager.CompleteItem("plugins.core", "核心插件加载完成");
+        }
+        catch (Exception ex)
+        {
+            // 标记失败
+            manager.FailItem("plugins.core", "插件加载失败", ex.Message);
+        }
+    }
+
+    /// <summary>
+    /// 示例：组件加载
+    /// </summary>
+    public static async Task LoadComponentsExample(LoadingStateManager manager)
+    {
+        var components = new[]
+        {
+            ("comp.weather", "天气组件"),
+            ("comp.clock", "时钟组件"),
+            ("comp.calendar", "日历组件")
+        };
+
+        foreach (var (id, name) in components)
+        {
+            // 注册组件
+            manager.RegisterItem(id, LoadingItemType.Component, name);
+
+            // 开始加载
+            manager.StartItem(id, $"正在加载 {name}...");
+
+            // 模拟加载过程
+            for (int i = 0; i <= 100; i += 20)
+            {
+                manager.UpdateProgress(id, i);
+                await Task.Delay(50);
+            }
+
+            // 完成
+            manager.CompleteItem(id, $"{name} 加载完成");
+        }
+    }
+
+    /// <summary>
+    /// 示例：网络资源加载
+    /// </summary>
+    public static async Task LoadNetworkResourcesExample(LoadingStateManager manager)
+    {
+        // 注册网络加载项
+        manager.RegisterItem(
+            "network.config",
+            LoadingItemType.Network,
+            "配置数据",
+            "从服务器获取最新配置");
+
+        manager.StartItem("network.config", "正在连接服务器...");
+
+        try
+        {
+            // 模拟网络请求
+            await Task.Delay(1000);
+
+            manager.UpdateProgress("network.config", 50, "正在下载数据...");
+
+            await Task.Delay(1000);
+
+            manager.CompleteItem("network.config", "配置数据已更新");
+        }
+        catch (Exception ex)
+        {
+            manager.FailItem("network.config", "网络请求失败", ex.Message);
+        }
+    }
+
+    /// <summary>
+    /// 示例：带超时的加载
+    /// </summary>
+    public static async Task LoadWithTimeoutExample(
+        LoadingStateManager manager,
+        LoadingTimeoutHandler timeoutHandler)
+    {
+        // 设置超时时间为 10 秒
+        timeoutHandler.SetItemTimeout("data.heavy", TimeSpan.FromSeconds(10));
+
+        // 注册加载项
+        manager.RegisterItem(
+            "data.heavy",
+            LoadingItemType.Data,
+            "大数据处理",
+            "处理大量数据，可能需要较长时间");
+
+        // 订阅超时事件
+        timeoutHandler.ItemTimeout += (s, e) =>
+        {
+            Console.WriteLine($"加载项 '{e.ItemName}' 超时！");
+        };
+
+        timeoutHandler.ItemRetry += (s, e) =>
+        {
+            Console.WriteLine($"正在重试 '{e.ItemName}' ({e.RetryCount}/{e.MaxRetryCount})...");
+        };
+
+        // 开始加载
+        manager.StartItem("data.heavy", "正在处理数据...");
+
+        // 模拟长时间操作
+        await Task.Delay(15000);
+
+        // 完成
+        manager.CompleteItem("data.heavy", "数据处理完成");
+    }
+
+    /// <summary>
+    /// 示例：完整启动流程
+    /// </summary>
+    public static async Task FullStartupExample(
+        LoadingStateManager manager,
+        LoadingStateReporter reporter,
+        LoadingTimeoutHandler timeoutHandler)
+    {
+        // 启动超时处理器
+        timeoutHandler.Start();
+
+        // 设置阶段
+        manager.SetStage(StartupStage.Initializing, "开始初始化...");
+
+        // 1. 系统初始化
+        manager.RegisterItem("system.init", LoadingItemType.System, "系统初始化");
+        manager.StartItem("system.init");
+        await Task.Delay(500);
+        manager.CompleteItem("system.init");
+
+        // 2. 加载设置
+        manager.SetStage(StartupStage.LoadingSettings, "正在加载设置...");
+        manager.RegisterItem("settings.load", LoadingItemType.Settings, "用户设置");
+        manager.StartItem("settings.load");
+        await Task.Delay(800);
+        manager.CompleteItem("settings.load");
+
+        // 3. 加载插件
+        manager.SetStage(StartupStage.LoadingPlugins, "正在加载插件...");
+        await LoadPluginsExample(manager);
+
+        // 4. 加载组件
+        await LoadComponentsExample(manager);
+
+        // 5. 加载网络资源
+        await LoadNetworkResourcesExample(manager);
+
+        // 6. 初始化界面
+        manager.SetStage(StartupStage.InitializingUI, "正在初始化界面...");
+        manager.RegisterItem("ui.init", LoadingItemType.System, "界面初始化");
+        manager.StartItem("ui.init");
+        await Task.Delay(600);
+        manager.CompleteItem("ui.init");
+
+        // 完成
+        manager.SetStage(StartupStage.Ready, "加载完成");
+
+        // 停止超时处理器
+        timeoutHandler.Stop();
+    }
+}

LanMountainDesktop/Services/Loading/LoadingTimeoutHandler.cs

@@ -0,0 +1,274 @@
+using System.Timers;
+
+namespace LanMountainDesktop.Services.Loading;
+
+/// <summary>
+/// 加载超时处理器 - 监控加载项超时并执行相应处理
+/// </summary>
+public class LoadingTimeoutHandler : IDisposable
+{
+    private readonly LoadingStateManager _manager;
+    private readonly System.Timers.Timer _checkTimer;
+    private readonly Dictionary<string, TimeSpan> _itemTimeouts = new();
+    private readonly Dictionary<string, int> _retryCounts = new();
+    private readonly object _lock = new();
+    private bool _isDisposed;
+
+    /// <summary>
+    /// 默认超时时间
+    /// </summary>
+    public TimeSpan DefaultTimeout { get; set; } = TimeSpan.FromSeconds(30);
+
+    /// <summary>
+    /// 最大重试次数
+    /// </summary>
+    public int MaxRetryCount { get; set; } = 3;
+
+    /// <summary>
+    /// 检查间隔
+    /// </summary>
+    public TimeSpan CheckInterval { get; set; } = TimeSpan.FromSeconds(5);
+
+    /// <summary>
+    /// 超时事件
+    /// </summary>
+    public event EventHandler<LoadingTimeoutEventArgs>? ItemTimeout;
+
+    /// <summary>
+    /// 重试事件
+    /// </summary>
+    public event EventHandler<LoadingRetryEventArgs>? ItemRetry;
+
+    /// <summary>
+    /// 最终失败事件（超过最大重试次数）
+    /// </summary>
+    public event EventHandler<LoadingTimeoutEventArgs>? ItemFailed;
+
+    public LoadingTimeoutHandler(LoadingStateManager manager)
+    {
+        _manager = manager ?? throw new ArgumentNullException(nameof(manager));
+
+        _checkTimer = new System.Timers.Timer(CheckInterval.TotalMilliseconds);
+        _checkTimer.Elapsed += OnCheckTimerElapsed;
+        _checkTimer.AutoReset = true;
+
+        // 订阅状态变更事件
+        _manager.StateChanged += OnStateChanged;
+    }
+
+    /// <summary>
+    /// 启动监控
+    /// </summary>
+    public void Start()
+    {
+        if (_isDisposed) return;
+        _checkTimer.Start();
+        AppLogger.Info("LoadingTimeoutHandler", "Timeout handler started");
+    }
+
+    /// <summary>
+    /// 停止监控
+    /// </summary>
+    public void Stop()
+    {
+        _checkTimer.Stop();
+        AppLogger.Info("LoadingTimeoutHandler", "Timeout handler stopped");
+    }
+
+    /// <summary>
+    /// 为特定加载项设置超时
+    /// </summary>
+    public void SetItemTimeout(string itemId, TimeSpan timeout)
+    {
+        lock (_lock)
+        {
+            _itemTimeouts[itemId] = timeout;
+        }
+    }
+
+    /// <summary>
+    /// 获取加载项的超时时间
+    /// </summary>
+    public TimeSpan GetItemTimeout(string itemId)
+    {
+        lock (_lock)
+        {
+            return _itemTimeouts.TryGetValue(itemId, out var timeout) ? timeout : DefaultTimeout;
+        }
+    }
+
+    /// <summary>
+    /// 重置重试计数
+    /// </summary>
+    public void ResetRetryCount(string itemId)
+    {
+        lock (_lock)
+        {
+            _retryCounts[itemId] = 0;
+        }
+    }
+
+    /// <summary>
+    /// 定时检查超时
+    /// </summary>
+    private void OnCheckTimerElapsed(object? sender, ElapsedEventArgs e)
+    {
+        if (_isDisposed) return;
+
+        try
+        {
+            var activeItems = _manager.GetActiveItems().ToList();
+            var now = DateTimeOffset.UtcNow;
+
+            foreach (var item in activeItems)
+            {
+                if (!item.StartTime.HasValue) continue;
+
+                var timeout = GetItemTimeout(item.Id);
+                var elapsed = now - item.StartTime.Value;
+
+                if (elapsed > timeout)
+                {
+                    HandleTimeout(item.Id, elapsed);
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            AppLogger.Warn("LoadingTimeoutHandler", $"Error checking timeouts: {ex.Message}");
+        }
+    }
+
+    /// <summary>
+    /// 处理超时
+    /// </summary>
+    private void HandleTimeout(string itemId, TimeSpan elapsed)
+    {
+        lock (_lock)
+        {
+            var retryCount = _retryCounts.GetValueOrDefault(itemId, 0);
+
+            if (retryCount < MaxRetryCount)
+            {
+                // 重试
+                _retryCounts[itemId] = retryCount + 1;
+
+                var item = _manager.GetAllItems().FirstOrDefault(i => i.Id == itemId);
+                if (item != null)
+                {
+                    AppLogger.Warn("LoadingTimeoutHandler",
+                        $"Item '{item.Name}' timed out after {elapsed.TotalSeconds}s, retrying ({retryCount + 1}/{MaxRetryCount})...");
+
+                    ItemRetry?.Invoke(this, new LoadingRetryEventArgs
+                    {
+                        ItemId = itemId,
+                        ItemName = item.Name,
+                        RetryCount = retryCount + 1,
+                        MaxRetryCount = MaxRetryCount,
+                        ElapsedTime = elapsed
+                    });
+
+                    // 重新启动该项
+                    _manager.StartItem(itemId, $"第 {retryCount + 1} 次重试...");
+                }
+            }
+            else
+            {
+                // 最终失败
+                _retryCounts.Remove(itemId);
+
+                var item = _manager.GetAllItems().FirstOrDefault(i => i.Id == itemId);
+                if (item != null)
+                {
+                    AppLogger.Error("LoadingTimeoutHandler",
+                        $"Item '{item.Name}' failed after {MaxRetryCount} retries ({elapsed.TotalSeconds}s)");
+
+                    var args = new LoadingTimeoutEventArgs
+                    {
+                        ItemId = itemId,
+                        ItemName = item.Name,
+                        ElapsedTime = elapsed,
+                        RetryCount = MaxRetryCount,
+                        IsFinalFailure = true
+                    };
+
+                    ItemTimeout?.Invoke(this, args);
+                    ItemFailed?.Invoke(this, args);
+
+                    // 标记为失败
+                    _manager.FailItem(itemId,
+                        $"加载超时（超过 {elapsed.TotalSeconds:F0} 秒）",
+                        $"已重试 {MaxRetryCount} 次但仍失败");
+                }
+            }
+        }
+    }
+
+    /// <summary>
+    /// 状态变更事件处理
+    /// </summary>
+    private void OnStateChanged(object? sender, LoadingStateChangedEventArgs e)
+    {
+        // 当项完成或失败时，清除重试计数
+        if (e.CurrentState is LoadingState.Completed or LoadingState.Failed or LoadingState.Cancelled)
+        {
+            lock (_lock)
+            {
+                _retryCounts.Remove(e.Item.Id);
+            }
+        }
+
+        // 当项开始时，如果是第一次开始，初始化重试计数
+        if (e.CurrentState == LoadingState.InProgress &&
+            (e.PreviousState == null || e.PreviousState == LoadingState.Pending))
+        {
+            lock (_lock)
+            {
+                if (!_retryCounts.ContainsKey(e.Item.Id))
+                {
+                    _retryCounts[e.Item.Id] = 0;
+                }
+            }
+        }
+    }
+
+    public void Dispose()
+    {
+        if (_isDisposed) return;
+        _isDisposed = true;
+
+        Stop();
+
+        _checkTimer.Elapsed -= OnCheckTimerElapsed;
+        _checkTimer.Dispose();
+
+        _manager.StateChanged -= OnStateChanged;
+
+        _itemTimeouts.Clear();
+        _retryCounts.Clear();
+    }
+}
+
+/// <summary>
+/// 加载超时事件参数
+/// </summary>
+public class LoadingTimeoutEventArgs : EventArgs
+{
+    public required string ItemId { get; init; }
+    public required string ItemName { get; init; }
+    public required TimeSpan ElapsedTime { get; init; }
+    public int RetryCount { get; init; }
+    public bool IsFinalFailure { get; init; }
+}
+
+/// <summary>
+/// 加载重试事件参数
+/// </summary>
+public class LoadingRetryEventArgs : EventArgs
+{
+    public required string ItemId { get; init; }
+    public required string ItemName { get; init; }
+    public required int RetryCount { get; init; }
+    public required int MaxRetryCount { get; init; }
+    public required TimeSpan ElapsedTime { get; init; }
+}