fix(worker): allow the done toggle from any non-Running status

MarkDoneAsync was Idle-only, so a finished task (typically a list-handler
run with no worktree to merge) could not be ticked off. Guard on Running
instead and cover the other statuses with tests.

tests/ClaudeDo.Worker.Tests/Hub/TaskDoneDequeueHubTests.cs

@@ -98,6 +98,21 @@ public sealed class TaskDoneDequeueHubTests : IDisposable
         Assert.Equal(TaskStatus.Running, reloaded!.Status);
     }
 
+    // Regression: the guard was Idle-only, so a finished task (typically a list-handler run,
+    // which has no worktree to merge) could no longer be ticked off from the task card.
+    [Fact]
+    public async Task SetTaskDone_FromWaitingForReview_TransitionsToDone()
+    {
+        var listId = await SeedListAsync();
+        var task = await SeedTaskAsync(listId, TaskStatus.WaitingForReview);
+
+        var hub = CreateHub();
+        await hub.SetTaskDone(task.Id);
+
+        var reloaded = await _tasks.GetByIdAsync(task.Id);
+        Assert.Equal(TaskStatus.Done, reloaded!.Status);
+    }
+
     // ── UnsetTaskDone ──
 
     [Fact]

tests/ClaudeDo.Worker.Tests/State/TaskStateServiceTests.cs

@@ -504,6 +504,24 @@ public sealed class TaskStateServiceTests : IDisposable
         Assert.Equal(TaskStatus.Running, await GetStatusAsync(id));
     }
 
+    // The done toggle is a manual affordance and must work from any non-Running status --
+    // notably WaitingForReview, where it deliberately skips the merge.
+    [Theory]
+    [InlineData(TaskStatus.Queued)]
+    [InlineData(TaskStatus.WaitingForReview)]
+    [InlineData(TaskStatus.WaitingForChildren)]
+    [InlineData(TaskStatus.Failed)]
+    [InlineData(TaskStatus.Cancelled)]
+    public async Task MarkDoneAsync_FromNonRunningStatus_TransitionsToDone(TaskStatus from)
+    {
+        var id = await SeedTaskAsync(from);
+
+        var result = await _sut.MarkDoneAsync(id, DateTime.UtcNow, default);
+
+        Assert.True(result.Ok);
+        Assert.Equal(TaskStatus.Done, await GetStatusAsync(id));
+    }
+
     [Fact]
     public async Task UnmarkDoneAsync_FromDone_TransitionsToIdle()
     {