feat(data): add AppSettings entity, migration, and repository

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

@@ -0,0 +1,74 @@
+using ClaudeDo.Data.Models;
+using ClaudeDo.Data.Repositories;
+using ClaudeDo.Worker.Tests.Infrastructure;
+
+namespace ClaudeDo.Worker.Tests.Repositories;
+
+public class AppSettingsRepositoryTests : IDisposable
+{
+    private readonly DbFixture _db = new();
+
+    public void Dispose() => _db.Dispose();
+
+    [Fact]
+    public async Task GetAsync_Returns_Seeded_Defaults()
+    {
+        using var ctx = _db.CreateContext();
+        var repo = new AppSettingsRepository(ctx);
+
+        var row = await repo.GetAsync();
+
+        Assert.Equal(AppSettingsEntity.SingletonId, row.Id);
+        Assert.Equal("sonnet", row.DefaultModel);
+        Assert.Equal(30, row.DefaultMaxTurns);
+        Assert.Equal("bypassPermissions", row.DefaultPermissionMode);
+        Assert.Equal("sibling", row.WorktreeStrategy);
+        Assert.Null(row.CentralWorktreeRoot);
+        Assert.False(row.WorktreeAutoCleanupEnabled);
+    }
+
+    [Fact]
+    public async Task UpdateAsync_Persists_And_RoundTrips()
+    {
+        using (var ctx = _db.CreateContext())
+        {
+            var repo = new AppSettingsRepository(ctx);
+            await repo.UpdateAsync(new AppSettingsEntity
+            {
+                DefaultClaudeInstructions = "be terse",
+                DefaultModel = "opus",
+                DefaultMaxTurns = 42,
+                DefaultPermissionMode = "acceptEdits",
+                WorktreeStrategy = "central",
+                CentralWorktreeRoot = "C:/worktrees",
+                WorktreeAutoCleanupEnabled = true,
+                WorktreeAutoCleanupDays = 14,
+            });
+        }
+
+        using var readCtx = _db.CreateContext();
+        var readRepo = new AppSettingsRepository(readCtx);
+        var row = await readRepo.GetAsync();
+
+        Assert.Equal("be terse", row.DefaultClaudeInstructions);
+        Assert.Equal("opus", row.DefaultModel);
+        Assert.Equal(42, row.DefaultMaxTurns);
+        Assert.Equal("acceptEdits", row.DefaultPermissionMode);
+        Assert.Equal("central", row.WorktreeStrategy);
+        Assert.Equal("C:/worktrees", row.CentralWorktreeRoot);
+        Assert.True(row.WorktreeAutoCleanupEnabled);
+        Assert.Equal(14, row.WorktreeAutoCleanupDays);
+    }
+
+    [Fact]
+    public async Task UpdateAsync_Blank_CentralRoot_Stored_As_Null()
+    {
+        using var ctx = _db.CreateContext();
+        var repo = new AppSettingsRepository(ctx);
+
+        await repo.UpdateAsync(new AppSettingsEntity { CentralWorktreeRoot = "   " });
+        var row = await repo.GetAsync();
+
+        Assert.Null(row.CentralWorktreeRoot);
+    }
+}