feat(mission-control): show running Worker operations in a Running now section

Registry of active verify/merge/rebase/worktree-creation operations in the Worker,
GetActiveOperations snapshot + OperationStarted/OperationEnded hub events, and a
Running now section in Mission Control with ticking elapsed time.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

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

@@ -59,6 +59,11 @@ public interface IWorkerClient : INotifyPropertyChanged
     /// total.</summary>
     event Action<string, string, int, int>? OperationProgressEvent;
 
+    /// <summary>A Worker operation (verify, merge, rebase, worktree creation) began.</summary>
+    event Action<RunningOperationDto>? OperationStartedEvent;
+    /// <summary>The operation with this id finished, failed or threw.</summary>
+    event Action<string>? OperationEndedEvent;
+
     event Action<string, string>? PlanningMergeStartedEvent;
     event Action<string, string>? PlanningSubtaskMergedEvent;
     /// <summary>(planningTaskId, subtaskId, conflictedFiles, externallyDriven). externallyDriven
@@ -208,6 +213,9 @@ public interface IWorkerClient : INotifyPropertyChanged
     Task<string> GetLastPrepLogAsync();
     Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync();
 
+    /// <summary>Operations running on the Worker right now — the state to start from before applying started/ended events.</summary>
+    Task<IReadOnlyList<RunningOperationDto>> GetActiveOperationsAsync();
+
     Task<List<PrimeScheduleDto>> GetPrimeSchedulesAsync();
     Task<PrimeScheduleDto?> UpsertPrimeScheduleAsync(PrimeScheduleDto dto);
     Task DeletePrimeScheduleAsync(Guid id);

src/ClaudeDo.Ui/Services/WorkerClient.cs

@@ -69,6 +69,8 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
     public event Action<UsageSnapshotDto>? UsageUpdatedEvent;
 
     public event Action<string, string, int, int>? OperationProgressEvent;
+    public event Action<RunningOperationDto>? OperationStartedEvent;
+    public event Action<string>? OperationEndedEvent;
 
     public event Action<string, string>? PlanningMergeStartedEvent;
     public event Action<string, string>? PlanningSubtaskMergedEvent;
@@ -203,6 +205,16 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
             Dispatcher.UIThread.Post(() => OperationProgressEvent?.Invoke(opKey, phase, current, total));
         });
 
+        _hub.On<RunningOperationDto>("OperationStarted", op =>
+        {
+            Dispatcher.UIThread.Post(() => OperationStartedEvent?.Invoke(op));
+        });
+
+        _hub.On<string>("OperationEnded", id =>
+        {
+            Dispatcher.UIThread.Post(() => OperationEndedEvent?.Invoke(id));
+        });
+
         _hub.On<string, string>("PlanningMergeStarted", (planningTaskId, targetBranch) =>
         {
             Dispatcher.UIThread.Post(() => PlanningMergeStartedEvent?.Invoke(planningTaskId, targetBranch));
@@ -530,6 +542,9 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
     public async Task<string> GetLastPrepLogAsync()
         => await TryInvokeAsync<string>("GetLastPrepLog") ?? string.Empty;
 
+    public async Task<IReadOnlyList<RunningOperationDto>> GetActiveOperationsAsync()
+        => await TryInvokeAsync<List<RunningOperationDto>>("GetActiveOperations") ?? new List<RunningOperationDto>();
+
     public async Task<IReadOnlyList<WorkerLogEntry>> GetRecentLogsAsync()
         => await TryInvokeAsync<List<WorkerLogEntry>>("GetRecentLogs") ?? new List<WorkerLogEntry>();