fix: close live document before automation exit

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

@@ -316,9 +316,15 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
             // 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 null) { AcadApplication.Quit(); return; }
-            transitions.Add("NativeQuitDispatched");
-            active.SendStringToExecute("_.QUIT _N ", true, false, false);
+            if (active is not null)
+            {
+                transitions.Add("ActiveDocumentCloseRequested");
+                active.CloseAndDiscard();
+            }
+            // Application.Quit alone leaves the script host alive. Close the
+            // live document first, then request normal application shutdown.
+            transitions.Add("ApplicationQuitRequested");
+            AcadApplication.Quit();
         }
         catch (System.Exception exception)
         {

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_UsesNativeQuitFromIdle()
+    [Fact] public void AutomationControlledExit_ClosesLiveDocumentThenQuitsFromIdle()
     {
         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.SendStringToExecute(\"_.QUIT _N \", true, false, false)", source);
+        Assert.Contains("active.CloseAndDiscard();", source);
+        Assert.Contains("AcadApplication.Quit();", source);
     }
 
     [Fact] public void Callback_AfterDocumentDestroyed_DoesNotAccessDocument()
@@ -100,7 +101,8 @@ 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 null) { AcadApplication.Quit(); return; }", source);
+        Assert.Contains("if (active is not null)", source);
+        Assert.Contains("AcadApplication.Quit();", source);
     }
 
     [Fact] public void TerminalState_IgnoresFurtherCallbacks()