feat(ui): show queued interactive messages above the composer

A queued message now appears in a pending strip above the input box (driven by
InteractiveQueueChanged), not optimistically in the transcript. The transcript
user line is added on delivery via InteractiveMessageSent. SessionTerminalView
gains QueuedMessages/HasQueuedMessages styled props (Mission Control); WorkConsole
binds Monitor.* (task detail). Adds session.composer.queued (en/de).

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

@@ -280,7 +280,7 @@ public class TaskMonitorViewModelTests : IDisposable
     }
 
     [Fact]
-    public async Task SubmitComposer_AddsUserLogLine_ClearsDraft_CallsClient()
+    public async Task SubmitComposer_CallsClient_ClearsDraft_DoesNotAddLogLine()
     {
         var worker = new FakeWorker();
         using var vm = Build(worker);
@@ -293,9 +293,89 @@ public class TaskMonitorViewModelTests : IDisposable
         Assert.Single(worker.SentInteractive);
         Assert.Equal(("t1", "do the thing"), worker.SentInteractive[0]);
         Assert.Equal(string.Empty, vm.ComposerDraft);
+        // Log must NOT be updated by submit itself; it updates on InteractiveMessageSent
+        Assert.Empty(vm.Log);
+    }
+
+    [Fact]
+    public void InteractiveMessageSent_ForSubscribedTask_AddsUserLogLine()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+
+        worker.RaiseInteractiveMessageSent("t1", "hello from event");
+
         Assert.Single(vm.Log);
         Assert.Equal(LogKind.User, vm.Log[0].Kind);
-        Assert.Equal("do the thing", vm.Log[0].Text);
+        Assert.Equal("hello from event", vm.Log[0].Text);
+    }
+
+    [Fact]
+    public void InteractiveMessageSent_ForOtherTask_IsIgnored()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+
+        worker.RaiseInteractiveMessageSent("other", "not mine");
+
+        Assert.Empty(vm.Log);
+    }
+
+    [Fact]
+    public void InteractiveQueueChanged_ForSubscribedTask_PopulatesQueue()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+
+        worker.RaiseInteractiveQueueChanged("t1", new[] { "msg1", "msg2" });
+
+        Assert.Equal(2, vm.QueuedMessages.Count);
+        Assert.True(vm.HasQueuedMessages);
+    }
+
+    [Fact]
+    public void InteractiveQueueChanged_EmptyList_ClearsQueue()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+        worker.RaiseInteractiveQueueChanged("t1", new[] { "msg1" });
+
+        worker.RaiseInteractiveQueueChanged("t1", Array.Empty<string>());
+
+        Assert.Empty(vm.QueuedMessages);
+        Assert.False(vm.HasQueuedMessages);
+    }
+
+    [Fact]
+    public void InteractiveQueueChanged_ForOtherTask_IsIgnored()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+
+        worker.RaiseInteractiveQueueChanged("other", new[] { "msg1" });
+
+        Assert.Empty(vm.QueuedMessages);
+        Assert.False(vm.HasQueuedMessages);
+    }
+
+    [Fact]
+    public void InteractiveEnded_ClearsQueuedMessages()
+    {
+        var worker = new FakeWorker();
+        using var vm = Build(worker);
+        vm.SetTaskId("t1");
+        worker.RaiseInteractiveStarted("t1");
+        worker.RaiseInteractiveQueueChanged("t1", new[] { "pending msg" });
+
+        worker.RaiseInteractiveEnded("t1");
+
+        Assert.Empty(vm.QueuedMessages);
+        Assert.False(vm.HasQueuedMessages);
     }
 
     [Fact]