fix(plugins): close LA5 host lifecycle review

tests/AcDream.App.Tests/Configuration/SessionConfigurationSharedFixtureTests.cs

@@ -56,6 +56,18 @@ public sealed class SessionConfigurationSharedFixtureTests
             StringComparison.Ordinal);
     }
 
+    [Fact]
+    public void AppReaderPreservesLauncherExplicitEmptyPluginAllowList()
+    {
+        using TemporaryFile file = TemporaryFile.Create(
+            LauncherCoreSessionConfigFixture.ComposeEmptyPlugins());
+
+        (_, SessionDescriptor session) = SessionConfigurationLoader.Load(file.Path);
+
+        Assert.NotNull(session.Plugins);
+        Assert.Empty(session.Plugins);
+    }
+
     [Fact]
     public void AppReaderAcceptsTheProductionShapedSharedFixture()
     {