feat(data): TaskRepository.SetPlanningStartedAsync

tests/ClaudeDo.Worker.Tests/Repositories/TaskRepositoryPlanningTests.cs

@@ -119,4 +119,37 @@ public sealed class TaskRepositoryPlanningTests : IDisposable
         await Assert.ThrowsAsync<InvalidOperationException>(() =>
             _tasks.CreateChildAsync("nonexistent-parent-id", "t", null, null, null));
     }
+
+    [Fact]
+    public async Task SetPlanningStartedAsync_ManualTask_TransitionsToPlanning()
+    {
+        var listId = await CreateListAsync();
+        var task = MakeTask(listId, TaskStatus.Manual);
+        await _tasks.AddAsync(task);
+
+        var result = await _tasks.SetPlanningStartedAsync(task.Id, "tok-abc");
+
+        Assert.NotNull(result);
+        Assert.Equal(TaskStatus.Planning, result!.Status);
+        Assert.Equal("tok-abc", result.PlanningSessionToken);
+
+        var loaded = await _tasks.GetByIdAsync(task.Id);
+        Assert.Equal(TaskStatus.Planning, loaded!.Status);
+        Assert.Equal("tok-abc", loaded.PlanningSessionToken);
+    }
+
+    [Fact]
+    public async Task SetPlanningStartedAsync_NonManualTask_ReturnsNull()
+    {
+        var listId = await CreateListAsync();
+        var task = MakeTask(listId, TaskStatus.Queued);
+        await _tasks.AddAsync(task);
+
+        var result = await _tasks.SetPlanningStartedAsync(task.Id, "tok-xyz");
+
+        Assert.Null(result);
+        var loaded = await _tasks.GetByIdAsync(task.Id);
+        Assert.Equal(TaskStatus.Queued, loaded!.Status);
+        Assert.Null(loaded.PlanningSessionToken);
+    }
 }