feat(ui): answer a running task's question inline in Mission Control

TaskMonitorViewModel surfaces a pending AskUser question (TaskQuestionAsked /
TaskQuestionResolved events) with an AnswerDraft + SubmitAnswerCommand that calls
the new IWorkerClient.AnswerTaskQuestionAsync; MonitorPaneView shows an accent
question banner with an input box above the terminal. Pending question is cleared
on answer/resolve/finish and re-hydrated on attach via GetPendingQuestionAsync.
en/de localization for missionControl.question.*; test fakes updated.

tests/ClaudeDo.Ui.Tests/ViewModels/TaskMonitorViewModelTests.cs

@@ -120,4 +120,73 @@ public class TaskMonitorViewModelTests : IDisposable
         vm.DetachCommand.Execute(null);
         Assert.Same(vm, requested);
     }
+
+    [Fact]
+    public void TaskQuestionAsked_SurfacesQuestion()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+
+        worker.RaiseTaskQuestionAsked("t1", "q1", "DPAPI or plaintext?");
+
+        Assert.True(vm.HasPendingQuestion);
+        Assert.Equal("DPAPI or plaintext?", vm.PendingQuestion);
+        Assert.True(vm.SubmitAnswerCommand.CanExecute(null) is false); // no draft yet
+    }
+
+    [Fact]
+    public void TaskQuestionAsked_ForOtherTask_IsIgnored()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+
+        worker.RaiseTaskQuestionAsked("other", "q1", "not mine");
+
+        Assert.False(vm.HasPendingQuestion);
+    }
+
+    [Fact]
+    public async Task SubmitAnswer_InvokesClient_AndClears()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+        worker.RaiseTaskQuestionAsked("t1", "q1", "DPAPI or plaintext?");
+        vm.AnswerDraft = "DPAPI please";
+
+        Assert.True(vm.SubmitAnswerCommand.CanExecute(null));
+        await vm.SubmitAnswerCommand.ExecuteAsync(null);
+
+        Assert.Equal(("t1", "q1", "DPAPI please"), worker.LastAnswer);
+        Assert.False(vm.HasPendingQuestion);
+        Assert.Equal(string.Empty, vm.AnswerDraft);
+    }
+
+    [Fact]
+    public void TaskQuestionResolved_ClearsMatchingQuestion()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+        worker.RaiseTaskQuestionAsked("t1", "q1", "?");
+
+        worker.RaiseTaskQuestionResolved("t1", "q1");
+
+        Assert.False(vm.HasPendingQuestion);
+    }
+
+    [Fact]
+    public void TaskFinished_ClearsPendingQuestion()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+        worker.RaiseTaskQuestionAsked("t1", "q1", "?");
+
+        worker.RaiseTaskFinished("slot-1", "t1", "done", DateTime.UtcNow);
+
+        Assert.False(vm.HasPendingQuestion);
+    }
 }