feat(worker): add external MCP list/task config tools

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/ClaudeDo.Worker.Tests/External/ConfigMcpToolsTests.cs

@@ -0,0 +1,80 @@
+using ClaudeDo.Data;
+using ClaudeDo.Data.Models;
+using ClaudeDo.Data.Repositories;
+using ClaudeDo.Worker.External;
+using ClaudeDo.Worker.Hub;
+using ClaudeDo.Worker.Tests.Infrastructure;
+
+namespace ClaudeDo.Worker.Tests.External;
+
+public sealed class ConfigMcpToolsTests : IDisposable
+{
+    private readonly DbFixture _db = new();
+    private readonly ClaudeDoDbContext _ctx;
+    private readonly ListRepository _lists;
+    private readonly TaskRepository _tasks;
+    private readonly ConfigMcpTools _sut;
+
+    public ConfigMcpToolsTests()
+    {
+        _ctx = _db.CreateContext();
+        _lists = new ListRepository(_ctx);
+        _tasks = new TaskRepository(_ctx);
+        _sut = new ConfigMcpTools(_lists, _tasks, new HubBroadcaster(new CapturingHubContext()));
+    }
+
+    public void Dispose() { _ctx.Dispose(); _db.Dispose(); }
+
+    private async Task<string> SeedListAsync()
+    {
+        var id = Guid.NewGuid().ToString();
+        await _lists.AddAsync(new ListEntity { Id = id, Name = "L", CreatedAt = DateTime.UtcNow });
+        return id;
+    }
+
+    [Fact]
+    public async Task SetAndGetListConfig_RoundTrips()
+    {
+        var listId = await SeedListAsync();
+
+        await _sut.SetListConfig(listId, "sonnet", "be terse", null, CancellationToken.None);
+        var cfg = await _sut.GetListConfig(listId, CancellationToken.None);
+
+        Assert.NotNull(cfg);
+        Assert.Equal("sonnet", cfg!.Model);
+        Assert.Equal("be terse", cfg.SystemPrompt);
+        Assert.Null(cfg.AgentPath);
+    }
+
+    [Fact]
+    public async Task SetListConfig_AllNull_ClearsConfig()
+    {
+        var listId = await SeedListAsync();
+        await _sut.SetListConfig(listId, "sonnet", null, null, CancellationToken.None);
+
+        await _sut.SetListConfig(listId, null, null, null, CancellationToken.None);
+
+        Assert.Null(await _sut.GetListConfig(listId, CancellationToken.None));
+    }
+
+    [Fact]
+    public async Task SetTaskConfig_PersistsOverrides()
+    {
+        var listId = await SeedListAsync();
+        var task = new TaskEntity
+        {
+            Id = Guid.NewGuid().ToString(),
+            ListId = listId,
+            Title = "t",
+            Status = ClaudeDo.Data.Models.TaskStatus.Idle,
+            CreatedAt = DateTime.UtcNow,
+            CommitType = "chore",
+        };
+        await _tasks.AddAsync(task);
+
+        await _sut.SetTaskConfig(task.Id, "opus", null, null, CancellationToken.None);
+
+        var loaded = await _tasks.GetByIdAsync(task.Id);
+        Assert.Equal("opus", loaded!.Model);
+    }
+}