refactor(ipc): declare the SignalR wire DTOs once in ClaudeDo.Data

WorkerHub and IWorkerClient each carried their own copy of every record and
had already drifted — MergePreviewDto lost its verify fields on the client
side, two records disagreed on their name. They now live in Data/Wire.cs and
reach both sides via a <Using> item, so a hub signature change is a compile
error instead of a silently dropped JSON field.

tests/ClaudeDo.Ui.Tests/ClaudeDo.Ui.Tests.csproj

@@ -8,6 +8,7 @@
   </PropertyGroup>
   <ItemGroup>
     <Using Include="Xunit" />
+    <Using Include="ClaudeDo.Data.Wire" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Avalonia" Version="12.0.4" />

tests/ClaudeDo.Ui.Tests/StubWorkerClient.cs

@@ -45,7 +45,7 @@ public abstract class StubWorkerClient : IWorkerClient
     public int ClearMyDayCalls { get; private set; }
     public int RunDailyPrepNowCalls { get; private set; }
 
-    public virtual IReadOnlyList<ActiveTask> GetActiveTasks() => System.Array.Empty<ActiveTask>();
+    public virtual IReadOnlyList<ActiveTaskDto> GetActiveTasks() => System.Array.Empty<ActiveTaskDto>();
 
     public void RaiseTaskStarted(string slot, string taskId, DateTime startedAt) => TaskStartedEvent?.Invoke(slot, taskId, startedAt);
     public void RaiseTaskFinished(string slot, string taskId, string status, DateTime finishedAt) => TaskFinishedEvent?.Invoke(slot, taskId, status, finishedAt);

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

@@ -94,8 +94,8 @@ public class MissionControlViewModelTests : IDisposable
 
     private sealed class SeededFakeWorker : StubWorkerClient
     {
-        public override IReadOnlyList<ActiveTask> GetActiveTasks()
-            => new[] { new ActiveTask("slot-1", "seed1", DateTime.UtcNow) };
+        public override IReadOnlyList<ActiveTaskDto> GetActiveTasks()
+            => new[] { new ActiveTaskDto("slot-1", "seed1", DateTime.UtcNow) };
     }
 
     // ── acceptance criterion (b): RefreshQueueAsync returns Running rows first ─

tests/ClaudeDo.Worker.Tests/ClaudeDo.Worker.Tests.csproj

@@ -19,6 +19,7 @@
 
   <ItemGroup>
     <Using Include="Xunit" />
+    <Using Include="ClaudeDo.Data.Wire" />
   </ItemGroup>
 
   <ItemGroup>

tests/ClaudeDo.Worker.Tests/UiVm/TasksIslandViewModelPlanningTests.cs

@@ -163,7 +163,7 @@ sealed class FakeWorkerClient : IWorkerClient
     public Task SetOnlineInboxConfigAsync(OnlineInboxConfigInputDto input) => Task.CompletedTask;
     public Task SetOnlineInboxAuthAsync(string refreshToken) => Task.CompletedTask;
     public Task ClearOnlineInboxAuthAsync() => Task.CompletedTask;
-    public IReadOnlyList<ActiveTask> GetActiveTasks() => System.Array.Empty<ActiveTask>();
+    public IReadOnlyList<ActiveTaskDto> GetActiveTasks() => System.Array.Empty<ActiveTaskDto>();
 
     public Task<UsageSnapshotDto?> GetUsageSnapshotAsync() => Task.FromResult<UsageSnapshotDto?>(null);
     public Task<UsageSnapshotDto?> RefreshUsageAsync() => Task.FromResult<UsageSnapshotDto?>(null);