Fix: some Reactive stuff

src/ClaudeDo.Worker/Hub/WorkerHub.cs

@@ -774,6 +774,7 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
     {
         if (_interactiveLaunchSpec is null)
             throw new InvalidOperationException("Interactive launch spec service is not configured.");
+        _broadcaster.WorktreeUpdated(taskId);
         return _interactiveLaunchSpec.BuildForTaskAsync(taskId, Context.ConnectionAborted);
     });
 

src/ClaudeDo.Worker/Lifecycle/InteractiveReviewSubmissionService.cs

@@ -2,6 +2,7 @@ using ClaudeDo.Data;
 using ClaudeDo.Data.Git;
 using ClaudeDo.Data.Models;
 using ClaudeDo.Data.Repositories;
+using ClaudeDo.Worker.Hub;
 using ClaudeDo.Worker.Runner;
 using ClaudeDo.Worker.State;
 using Microsoft.EntityFrameworkCore;
@@ -20,17 +21,20 @@ public sealed class InteractiveReviewSubmissionService
     private readonly GitService _git;
     private readonly ITaskStateService _state;
     private readonly WorktreeManager? _worktreeManager;
+    private readonly HubBroadcaster? _broadcaster;
 
     public InteractiveReviewSubmissionService(
         IDbContextFactory<ClaudeDoDbContext> dbFactory,
         GitService git,
         ITaskStateService state,
-        WorktreeManager? worktreeManager = null)
+        WorktreeManager? worktreeManager = null,
+        HubBroadcaster? broadcaster = null)
     {
         _dbFactory = dbFactory;
         _git = git;
         _state = state;
         _worktreeManager = worktreeManager;
+        _broadcaster = broadcaster;
     }
 
     public async Task SubmitAsync(string taskId, CancellationToken ct)
@@ -86,5 +90,14 @@ public sealed class InteractiveReviewSubmissionService
         var result = await _state.SubmitInteractiveForReviewAsync(taskId, DateTime.UtcNow, ct);
         if (!result.Ok)
             throw new InvalidOperationException(result.Reason ?? "Could not submit for review.");
+
+        // The transition itself only broadcasts TaskUpdated, and the detail pane answers that by
+        // refreshing the task row alone -- its whole REVIEW/MERGE block (Open diff, branch picker,
+        // change summary) is gated on the worktree it last read, refreshed only on WorktreeUpdated.
+        // An interactive session creates its worktree at launch and gets it committed HERE, both
+        // outside the autonomous pipeline that would normally announce it, so without this the task
+        // arrives in WaitingForReview with the diff button missing until it is re-selected.
+        if (_broadcaster is not null)
+            await _broadcaster.WorktreeUpdated(taskId);
     }
 }