refactor(app): compose live presentation startup

tests/AcDream.App.Tests/Composition/AnimationHookRegistrationSetTests.cs

@@ -64,6 +64,36 @@ public sealed class AnimationHookRegistrationSetTests
             registrations.Register(new Sink("late")));
     }
 
+    [Fact]
+    public void OwnedRegistrationReleasesExactlyAndRetriesItsOwnFailure()
+    {
+        int adds = 0;
+        int removes = 0;
+        bool fail = true;
+        var sink = new Sink("owned");
+        var registrations = new AnimationHookRegistrationSet(
+            _ => adds++,
+            _ =>
+            {
+                removes++;
+                if (fail)
+                    throw new InvalidOperationException("retry");
+            });
+
+        IDisposable binding = registrations.RegisterOwned(sink);
+        Assert.Throws<InvalidOperationException>(() =>
+            registrations.RegisterOwned(sink));
+        Assert.Throws<InvalidOperationException>(binding.Dispose);
+        fail = false;
+        binding.Dispose();
+        binding.Dispose();
+        registrations.Dispose();
+
+        Assert.Equal(1, adds);
+        Assert.Equal(2, removes);
+        Assert.True(registrations.IsCleanupComplete);
+    }
+
     private sealed class Sink(string name) : IAnimationHookSink
     {
         public string Name { get; } = name;