fix: close all automation-opened documents

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/FirstLimitedApplyAutomation.cs

@@ -129,6 +129,7 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
     }
     private FirstApplyAutomationConfiguration? config;
     private Document? document;
+    private readonly List<Document> automationOpenedDocuments = [];
     private readonly List<string> completed = [];
     private int step;
     private int? before, after1, after2, afterUndo;
@@ -159,9 +160,10 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
             var project = PlantProject.LoadProject(projectXml, false, string.Empty, string.Empty);
             PlantApplication.SetCurrentProject(project, true);
             transitions.Add("ProjectActivated");
-            if (!string.IsNullOrWhiteSpace(config.ModelDrawingPath)) AcadApplication.DocumentManager.Open(config.ModelDrawingPath, false);
+            if (!string.IsNullOrWhiteSpace(config.ModelDrawingPath)) automationOpenedDocuments.Add(AcadApplication.DocumentManager.Open(config.ModelDrawingPath, false));
             transitions.Add("DocumentOpenStarted");
             document = AcadApplication.DocumentManager.Open(config.OrthoDrawingPath, false);
+            automationOpenedDocuments.Add(document);
             AcadApplication.DocumentManager.MdiActiveDocument = document;
             transitions.Add("DocumentOpened");
             document.CommandEnded += OnCommandEnded;
@@ -315,12 +317,15 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
             exitHandlerSubscribed = false;
             // Do not close a cached automation document and then reuse it. Resolve
             // the currently-live document only at the final quiescent callback.
-            var active = AcadApplication.DocumentManager.MdiActiveDocument;
-            if (active is not null)
+            // Only documents opened by this coordinator may be closed. Keep no
+            // document reference after closing it; DocumentDestroyed can run
+            // immediately as part of CloseAndDiscard.
+            foreach (var opened in automationOpenedDocuments.ToArray().Reverse())
             {
-                transitions.Add("ActiveDocumentCloseRequested");
-                active.CloseAndDiscard();
+                transitions.Add("AutomationDocumentCloseRequested");
+                opened.CloseAndDiscard();
             }
+            automationOpenedDocuments.Clear();
             // Application.Quit alone leaves the script host alive. Close the
             // live document first, then request normal application shutdown.
             transitions.Add("ApplicationQuitRequested");

Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/FoundationTests.cs

@@ -82,12 +82,13 @@ public sealed class FoundationTests
         Assert.Contains("PostStartupReady", source);
     }
 
-    [Fact] public void AutomationControlledExit_ClosesLiveDocumentThenQuitsFromIdle()
+    [Fact] public void AutomationControlledExit_ClosesOnlyAutomationDocumentsThenQuits()
     {
         var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
         Assert.Contains("RequestControlledExit", source);
         Assert.Contains("AcadApplication.Idle += OnExitIdle", source);
-        Assert.Contains("active.CloseAndDiscard();", source);
+        Assert.Contains("automationOpenedDocuments", source);
+        Assert.Contains("opened.CloseAndDiscard();", source);
         Assert.Contains("AcadApplication.Quit();", source);
     }
 
@@ -101,7 +102,7 @@ public sealed class FoundationTests
     [Fact] public void Idle_WhenActiveDocumentNull_DoesNotThrow()
     {
         var source = File.ReadAllText(Path.Combine(ProjectRoot, "src", "PRecAnnot.Plant3D2026", "FirstLimitedApplyAutomation.cs"));
-        Assert.Contains("if (active is not null)", source);
+        Assert.DoesNotContain("MdiActiveDocument", source[source.IndexOf("private void DispatchNativeQuit", StringComparison.Ordinal)..]);
         Assert.Contains("AcadApplication.Quit();", source);
     }
 
@@ -143,7 +144,7 @@ public sealed class FoundationTests
         var controlledExit = source[source.IndexOf("private void RequestControlledExit", StringComparison.Ordinal)..];
         Assert.DoesNotContain("document.CloseAndDiscard", controlledExit);
         Assert.Contains("Resolve", controlledExit, StringComparison.OrdinalIgnoreCase);
-        Assert.Contains("MdiActiveDocument", controlledExit);
+        Assert.DoesNotContain("MdiActiveDocument", controlledExit);
     }
 
     [Fact] public void FinalCommandCompletion_UsesItsQuiescentExitBoundary()