refactor(interactive): remove streaming interactive stack (superseded by ConPTY)

The embedded ConPTY terminal replaced the in-app streaming interactive session, so
delete the dead stack: StreamingClaudeSession, InteractiveSessionService,
ProcessClaudeStreamTransport, IClaudeStreamTransport, ILiveSession, LiveSessionRegistry,
IdleSessionReaper (+ WorkerConfig.InteractiveIdleTimeoutMinutes), the WorkerHub
interactive methods + HubBroadcaster events, IWorkerClient interactive members, the
TaskMonitorViewModel composer + SessionTerminalView composer markup, and the old
'Run interactively' entry. AskUser/PendingQuestionRegistry, the autonomous path,
planning, ResumeTaskInTerminal, and all ConPTY code are kept. Localization pruned.

src/ClaudeDo.Ui/ViewModels/MissionControlViewModel.cs

@@ -22,7 +22,6 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
     private readonly Action<string, string, string, DateTime> _onTaskFinished;
     private readonly Action<string> _onTaskUpdated;
     private readonly Action _onConnectionRestored;
-    private readonly Action<string> _onInteractiveStarted;
 
     public ObservableCollection<TaskMonitorViewModel> Monitors { get; } = new();
 
@@ -94,14 +93,6 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
         _onConnectionRestored = () => { SeedActive(); _ = RefreshQueueAsync(); };
         _worker.ConnectionRestoredEvent += _onConnectionRestored;
 
-        _onInteractiveStarted = taskId =>
-        {
-            EnsureMonitor(taskId);
-            var m = Monitors.FirstOrDefault(x => x.SubscribedTaskId == taskId);
-            m?.SetInteractiveLive(true);
-        };
-        _worker.InteractiveSessionStartedEvent += _onInteractiveStarted;
-
         SeedActive();
         _ = RefreshQueueAsync();
     }
@@ -231,8 +222,7 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
     }
 
     // Fetches the launch spec for a task's worktree and hosts an embedded ConPTY session as a
-    // Command Center pane (task-based only). A distinct entry point from RunInteractivelyAsync's
-    // streaming session — the two coexist until the streaming stack is removed.
+    // Command Center pane (task-based only).
     public async System.Threading.Tasks.Task OpenConPtySessionAsync(string taskId)
     {
         if (string.IsNullOrEmpty(taskId)) return;
@@ -362,7 +352,6 @@ public sealed partial class MissionControlViewModel : ViewModelBase, IDisposable
         _worker.TaskFinishedEvent -= _onTaskFinished;
         _worker.TaskUpdatedEvent -= _onTaskUpdated;
         _worker.ConnectionRestoredEvent -= _onConnectionRestored;
-        _worker.InteractiveSessionStartedEvent -= _onInteractiveStarted;
         Monitors.CollectionChanged -= OnMonitorsChanged;
         ConPtySessions.CollectionChanged -= OnConPtySessionsChanged;
         Panes.CollectionChanged -= OnPanesChanged;