feat(worker): expose RestoreDefaultAgents hub method

tests/ClaudeDo.Worker.Tests/Hub/AgentSettingsHubTests.cs

@@ -44,4 +44,29 @@ public sealed class AgentSettingsHubTests : IDisposable
 
         Assert.Null(await _repo.GetConfigAsync(listId));
     }
+
+    [Fact]
+    public async Task RestoreDefaultAgents_CopiesMissingBundledFiles()
+    {
+        var root = Path.Combine(Path.GetTempPath(), $"claudedo_hub_restore_{Guid.NewGuid():N}");
+        var bundleDir = Path.Combine(root, "bundle");
+        var targetDir = Path.Combine(root, "target");
+        try
+        {
+            Directory.CreateDirectory(bundleDir);
+            Directory.CreateDirectory(targetDir);
+            await File.WriteAllTextAsync(Path.Combine(bundleDir, "code-reviewer.md"), "body");
+
+            var seeder = new ClaudeDo.Worker.Services.DefaultAgentSeeder(bundleDir, targetDir);
+            var result = await seeder.SeedMissingAsync();
+
+            Assert.Equal(1, result.Copied);
+            Assert.Equal(0, result.Skipped);
+            Assert.True(File.Exists(Path.Combine(targetDir, "code-reviewer.md")));
+        }
+        finally
+        {
+            try { Directory.Delete(root, true); } catch { }
+        }
+    }
 }