feat(ui): add MissionControlViewModel

src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs

@@ -34,6 +34,8 @@ public interface IWorkerClient : INotifyPropertyChanged
 
     string? LastApproveTarget { get; }
 
+    IReadOnlyList<ActiveTask> GetActiveTasks();
+
     Task WakeQueueAsync();
     Task RunNowAsync(string taskId);
     Task ContinueTaskAsync(string taskId, string followUpPrompt);

src/ClaudeDo.Ui/Services/WorkerClient.cs

@@ -1,4 +1,5 @@
 using System.Collections.ObjectModel;
+using System.Linq;
 using Avalonia.Threading;
 using ClaudeDo.Data.Models;
 using ClaudeDo.Data.Repositories;
@@ -68,6 +69,8 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
 
     public string? LastApproveTarget { get; private set; }
 
+    public IReadOnlyList<ActiveTask> GetActiveTasks() => ActiveTasks.ToList();
+
     public WorkerClient(string signalRUrl)
     {
         _hub = new HubConnectionBuilder()

src/ClaudeDo.Ui/ViewModels/MissionControlViewModel.cs

@@ -0,0 +1,104 @@
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.Linq;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using ClaudeDo.Data;
+using ClaudeDo.Data.Repositories;
+using ClaudeDo.Ui.Services;
+using ClaudeDo.Ui.ViewModels.Islands;
+using Microsoft.EntityFrameworkCore;
+
+namespace ClaudeDo.Ui.ViewModels;
+
+public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
+{
+    private readonly IDbContextFactory<ClaudeDoDbContext> _dbFactory;
+    private readonly IWorkerClient _worker;
+    private readonly Action<string, string, DateTime> _onTaskStarted;
+    private readonly Action _onConnectionRestored;
+
+    public ObservableCollection<TaskMonitorViewModel> Monitors { get; } = new();
+
+    [ObservableProperty] private int _columnCount = 1;
+
+    public bool HasMonitors => Monitors.Count > 0;
+
+    public MissionControlViewModel(IDbContextFactory<ClaudeDoDbContext> dbFactory, IWorkerClient worker)
+    {
+        _dbFactory = dbFactory;
+        _worker = worker;
+
+        Monitors.CollectionChanged += OnMonitorsChanged;
+
+        _onTaskStarted = (slot, taskId, startedAt) => EnsureMonitor(taskId);
+        _worker.TaskStartedEvent += _onTaskStarted;
+
+        _onConnectionRestored = SeedActive;
+        _worker.ConnectionRestoredEvent += _onConnectionRestored;
+
+        SeedActive();
+    }
+
+    private void SeedActive()
+    {
+        foreach (var a in _worker.GetActiveTasks())
+            EnsureMonitor(a.TaskId);
+    }
+
+    private void EnsureMonitor(string taskId)
+    {
+        if (string.IsNullOrEmpty(taskId)) return;
+        if (Monitors.Any(m => m.SubscribedTaskId == taskId)) return;
+
+        var monitor = new TaskMonitorViewModel(_dbFactory, _worker);
+        monitor.SetTaskId(taskId);
+        Monitors.Add(monitor);
+        _ = HydrateAsync(monitor, taskId);
+    }
+
+    private async System.Threading.Tasks.Task HydrateAsync(TaskMonitorViewModel monitor, string taskId)
+    {
+        try
+        {
+            await using var ctx = await _dbFactory.CreateDbContextAsync();
+            var entity = await ctx.Tasks.AsNoTracking().FirstOrDefaultAsync(t => t.Id == taskId);
+            if (entity is null || monitor.SubscribedTaskId != taskId) return;
+            monitor.ApplyState(entity.Status);
+            var latestRun = await new TaskRunRepository(ctx).GetLatestByTaskIdAsync(taskId);
+            monitor.ApplyOutcome(entity.Result, latestRun?.ErrorMarkdown);
+            await monitor.ReplayLogFileAsync(entity.LogPath, CancellationToken.None);
+        }
+        catch { /* best-effort hydrate */ }
+    }
+
+    [RelayCommand]
+    private void ClearFinished()
+    {
+        foreach (var m in Monitors.Where(m => m.IsDone || m.IsFailed || m.IsCancelled).ToList())
+        {
+            Monitors.Remove(m);
+            m.Dispose();
+        }
+    }
+
+    private void OnMonitorsChanged(object? sender, NotifyCollectionChangedEventArgs e)
+    {
+        ColumnCount = Monitors.Count switch
+        {
+            <= 1 => 1,
+            <= 4 => 2,
+            _    => 3,
+        };
+        OnPropertyChanged(nameof(HasMonitors));
+    }
+
+    public void Dispose()
+    {
+        _worker.TaskStartedEvent -= _onTaskStarted;
+        _worker.ConnectionRestoredEvent -= _onConnectionRestored;
+        Monitors.CollectionChanged -= OnMonitorsChanged;
+        foreach (var m in Monitors) m.Dispose();
+        Monitors.Clear();
+    }
+}