From d6ae7060989c3fb8ca0d632f7ecd60775dd90af0 Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Sun, 11 Oct 2026 22:15:08 -0400
Subject: [PATCH] refactor(cutting-ui): retire redundant planning and
 validation forms

---
 .../Controls/ValidationOverlayTests.cs        |  47 ++
 .../Forms/CuttingInspectionPanelTests.cs      |  98 +++-
 .../Forms/CuttingPlanFormTests.cs             | 348 ------------
 .../Forms/CuttingUiRetirementTests.cs         |  19 +
 .../Forms/CuttingValidationPanelTests.cs      |  49 ++
 .../Forms/ValidateNestFormTests.cs            | 302 ----------
 OpenNest/Forms/CuttingInspectionPanel.cs      |   8 +
 OpenNest/Forms/CuttingPlanForm.Designer.cs    | 291 ----------
 OpenNest/Forms/CuttingPlanForm.cs             | 514 ------------------
 OpenNest/Forms/EditNestForm.cs                |  25 -
 OpenNest/Forms/MainForm.cs                    |  23 +-
 OpenNest/Forms/ValidateNestForm.cs            | 326 -----------
 OpenNest/Forms/ValidationInspectionScope.cs   |   5 -
 docs/cutting-planner.md                       |   2 +
 docs/post-verification.md                     |   4 +-
 docs/windows-acceptance.md                    |   2 +-
 scripts/windows-acceptance.json               |  34 +-
 17 files changed, 268 insertions(+), 1829 deletions(-)
 create mode 100644 OpenNest.WinForms.Tests/Controls/ValidationOverlayTests.cs
 delete mode 100644 OpenNest.WinForms.Tests/Forms/CuttingPlanFormTests.cs
 create mode 100644 OpenNest.WinForms.Tests/Forms/CuttingUiRetirementTests.cs
 delete mode 100644 OpenNest.WinForms.Tests/Forms/ValidateNestFormTests.cs
 delete mode 100644 OpenNest/Forms/CuttingPlanForm.Designer.cs
 delete mode 100644 OpenNest/Forms/CuttingPlanForm.cs
 delete mode 100644 OpenNest/Forms/ValidateNestForm.cs

diff --git a/OpenNest.WinForms.Tests/Controls/ValidationOverlayTests.cs b/OpenNest.WinForms.Tests/Controls/ValidationOverlayTests.cs
new file mode 100644
index 0000000..82a9cc3
--- /dev/null
+++ b/OpenNest.WinForms.Tests/Controls/ValidationOverlayTests.cs
@@ -0,0 +1,47 @@
+using System.Drawing;
+using OpenNest.Controls;
+using OpenNest.Diagnostics;
+using OpenNest.Geometry;
+
+namespace OpenNest.WinForms.Tests.Controls;
+
+public class ValidationOverlayTests
+{
+    [Fact]
+    public void RapidContactCrosshairIsDrawnAtContactAndClearedWithFinding() => RunSta(() =>
+    {
+        using var view = new PlateView();
+        view.ShowValidationFinding(new PostVerificationFinding(PostVerificationKind.RapidCrossing, 1, 2, 1, "crossing")
+        {
+            RapidStart = new Vector(-1, 0),
+            RapidEnd = new Vector(1, 0),
+            ContactPoints = Array.AsReadOnly(new[] { Vector.Zero })
+        });
+        using var bitmap = new Bitmap(120, 120);
+        using var graphics = Graphics.FromImage(bitmap);
+        graphics.TranslateTransform(60, 60);
+        graphics.Clear(Color.Black);
+        view.ValidationOverlay.Draw(graphics);
+        var pixel = bitmap.GetPixel(60, 65);
+        Assert.True(pixel.R > 150 && pixel.B > 50 && pixel.G < 100);
+        view.ClearValidationFinding();
+        graphics.Clear(Color.Black);
+        view.ValidationOverlay.Draw(graphics);
+        Assert.Equal(Color.Black.ToArgb(), bitmap.GetPixel(60, 65).ToArgb());
+    });
+
+    [Fact]
+    public void PlateSwitchClearsAnimation() => RunSta(() =>
+    {
+        using var view = new PlateView();
+        view.ShowValidationFinding(new PostVerificationFinding(PostVerificationKind.MissingLeadIn, 1, 1, null, "missing")
+        { Location = new Vector(3, 4) });
+        Assert.True(view.ValidationOverlay.IsAnimating);
+        view.Plate = new Plate();
+        Assert.False(view.ValidationOverlay.IsAnimating);
+        Assert.Null(view.ValidationOverlay.Finding);
+    });
+
+    private static void RunSta(System.Action action) =>
+        StaTestThread.Run(action, TimeSpan.FromSeconds(30), "Validation overlay test timed out.");
+}
diff --git a/OpenNest.WinForms.Tests/Forms/CuttingInspectionPanelTests.cs b/OpenNest.WinForms.Tests/Forms/CuttingInspectionPanelTests.cs
index ef10401..2be5fb8 100644
--- a/OpenNest.WinForms.Tests/Forms/CuttingInspectionPanelTests.cs
+++ b/OpenNest.WinForms.Tests/Forms/CuttingInspectionPanelTests.cs
@@ -220,7 +220,20 @@ public class CuttingInspectionPanelTests
         Assert.False(accept.Checked);
         PumpUntil(() => panel.Proposal != null && !panel.IsPlanning);
         Assert.False(Field<Button>(panel, "applyButton").Enabled);
-        panel.RequestClose();
+        var grid = Field<DataGridView>(panel, "warningGrid");
+        Assert.NotEmpty(grid.Rows.Cast<DataGridViewRow>());
+        var partRow = grid.Rows.Cast<DataGridViewRow>().First(r => r.Cells[1].Value is int);
+        grid.ClearSelection();
+        partRow.Selected = true;
+        Assert.Contains("affected part extent", Field<Label>(panel, "previewLabel").Text);
+        Field<Button>(panel, "applyButton").PerformClick();
+        Assert.Null(panel.CommitResult);
+        Assert.All(plate.Parts, part => Assert.False(part.HasManualLeadIns));
+        accept.Checked = true;
+        Field<Button>(panel, "applyButton").PerformClick();
+        Assert.Equal(OpenNest.CNC.CuttingPlanning.CuttingCommitStatus.Applied, panel.CommitResult!.Status);
+        Assert.All(plate.Parts, part => Assert.True(part.HasManualLeadIns));
+        Assert.Null(editor.CuttingInspection);
     });
 
     [Fact]
@@ -242,6 +255,10 @@ public class CuttingInspectionPanelTests
         Assert.Contains("Replan", Field<TextBox>(panel, "resultLabel").Text);
         Assert.Equal(programs, plate.Parts.Select(p => p.Program));
         Assert.All(plate.Parts, p => Assert.False(p.HasManualLeadIns));
+        panel.StartPlanning();
+        PumpUntil(() => panel.Proposal != null && !panel.IsPlanning);
+        Assert.True(Field<Button>(panel, "applyButton").Enabled);
+        Assert.True(editor.PlateView.HasProposalDisplay);
         panel.RequestClose();
     });
 
@@ -259,7 +276,18 @@ public class CuttingInspectionPanelTests
         var proposed = panel.Proposal.Plates[0].Result.ProposedOrder
             .Select(part => original[part.SourceOrdinal]).ToArray();
         Assert.True(Field<Button>(panel, "applyButton").Enabled);
+        var parameters = Field<CuttingParameters>(panel, "parameters");
+        var reordered = 0;
+        editor.PlateView.PartsReordered += (_, _) => reordered++;
         Field<Button>(panel, "applyButton").PerformClick();
+        Assert.Equal(1, reordered);
+        Assert.NotSame(parameters, plate.CuttingParameters);
+        foreach (var layout in editor.PlateView.LayoutParts)
+        {
+            if (layout.IsDirty)
+                layout.Update(editor.PlateView);
+            Assert.True(layout.LeadInPath?.PointCount > 0);
+        }
         Assert.Null(editor.CuttingInspection);
         Assert.False(editor.PlateView.InspectionOnly);
         Assert.False(editor.PlateView.HasProposalDisplay);
@@ -304,7 +332,7 @@ public class CuttingInspectionPanelTests
         panel.BeforePostApply = () => throw new InvalidOperationException("synthetic defaults failure");
         panel.OnPostApplyError = ex => error = ex;
         Field<Button>(panel, "applyButton").PerformClick();
-        Assert.Equal(OpenNest.CNC.CuttingPlanning.CuttingCommitStatus.Applied, panel.CommitResult.Status);
+        Assert.Equal(OpenNest.CNC.CuttingPlanning.CuttingCommitStatus.Applied, panel.CommitResult!.Status);
         Assert.IsType<InvalidOperationException>(error);
         Assert.Null(editor.CuttingInspection);
         Assert.False(editor.PlateView.InspectionOnly);
@@ -312,6 +340,72 @@ public class CuttingInspectionPanelTests
         Assert.All(editor.PlateView.Plate.Parts, part => Assert.True(part.HasManualLeadIns));
     });
 
+    [Fact]
+    public void ConstructorKeepsItsOwnCopyOfSettings() => RunSta(() =>
+    {
+        using var editor = Editor();
+        var parameters = Parameters();
+        using var panel = new CuttingInspectionPanel(editor, parameters);
+        ((LineLeadIn)parameters.ExternalLeadIn).Length = 5;
+        var captured = Field<CuttingParameters>(panel, "parameters");
+        Assert.NotSame(parameters, captured);
+        Assert.Equal(0.3, ((LineLeadIn)captured.ExternalLeadIn).Length);
+    });
+
+    [Fact]
+    public void EmptySentinelIsNotNumberedAsAnOccupiedPlate() => RunSta(() =>
+    {
+        using var editor = Editor();
+        editor.Show();
+        editor.PlateManager.LoadAt(editor.Nest.Plates.Count - 1);
+        editor.OpenCuttingInspection();
+        var panel = editor.CuttingInspection!;
+        PumpUntil(() => panel.Proposal != null && !panel.IsPlanning);
+        Assert.Equal("New plate (empty)", Field<Label>(panel, "previewLabel").Text);
+        Assert.False(editor.PlateView.HasProposalDisplay);
+        panel.RequestClose();
+    });
+
+    [Fact]
+    public void BusyMenuRefusesPlanningAndFreeMenuOpensDockedPanel() => RunSta(() =>
+    {
+        using var host = new MenuHost();
+        using var editor = Editor();
+        host.Show();
+        editor.MdiParent = host;
+        editor.Show();
+        editor.Activate();
+        editor.PlateManager.LoadAt(0);
+        var busy = typeof(MainForm).GetField("nestingInProgress", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic)!;
+        var show = typeof(MainForm).GetMethod("ShowCuttingPlan", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic)!;
+        busy.SetValue(host, true);
+        Assert.True(host.IsCuttingPlanBusy([editor.PlateView]));
+        string? notice = null;
+        host.CuttingPlanNotice = (message, caption) =>
+        {
+            Assert.Equal("Plan Cutting", caption);
+            notice = message;
+        };
+        show.Invoke(host, [false]); // Exercise the real guarded menu path, not only its predicate.
+        Assert.Contains("Finish or cancel", notice);
+        Assert.Null(editor.CuttingInspection);
+        Assert.False(editor.PlateView.InspectionOnly);
+        busy.SetValue(host, false);
+        Assert.False(host.IsCuttingPlanBusy([editor.PlateView]));
+        // A completed DoEvents loop removes the ambient context; the panel still owns its dispatcher.
+        Application.DoEvents();
+        show.Invoke(host, [false]);
+        var panel = Assert.IsType<CuttingInspectionPanel>(editor.CuttingInspection);
+        PumpUntil(() => panel.Proposal != null && !panel.IsPlanning);
+        Assert.True(Field<Button>(panel, "applyButton").Enabled);
+        panel.RequestClose();
+    });
+
+    private sealed class MenuHost : MainForm
+    {
+        protected override void OnLoad(EventArgs e) { }
+    }
+
     private static T Field<T>(object target, string name) => Assert.IsType<T>(target.GetType()
         .GetField(name, System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance)?.GetValue(target));
 
diff --git a/OpenNest.WinForms.Tests/Forms/CuttingPlanFormTests.cs b/OpenNest.WinForms.Tests/Forms/CuttingPlanFormTests.cs
deleted file mode 100644
index bffce19..0000000
--- a/OpenNest.WinForms.Tests/Forms/CuttingPlanFormTests.cs
+++ /dev/null
@@ -1,348 +0,0 @@
-using System.Reflection;
-using System.Windows.Forms;
-using OpenNest.CNC.CuttingPlanning;
-using OpenNest.CNC.CuttingStrategy;
-using OpenNest.Controls;
-using OpenNest.Forms;
-using OpenNest.Geometry;
-
-namespace OpenNest.WinForms.Tests.Forms;
-
-// Shown forms and Application.OpenForms-based guards share this collection with the fill tests.
-[Collection("Fill operation lifetime")]
-public class CuttingPlanFormTests
-{
-    [Fact]
-    public void PlanThenApply_InstallsThePlanAndRedrawsTheEditorInPlateOrder() => RunSta(() =>
-    {
-        var (nest, view) = CreateView(Square("a", 12, 1), Square("b", 1, 1));
-        using var editor = view;
-        var plate = view.Plate;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters());
-        form.Show();
-        WaitForPlan(form);
-
-        Assert.True(Control<Button>(form, "applyButton").Enabled);
-        Assert.StartsWith("Ready to apply to 1 plate", Control<TextBox>(form, "summaryBox").Text);
-        var preview = Field<PlateView>(form, "preview");
-        Assert.True(preview.Visible);
-        Assert.NotSame(plate, preview.Plate);
-        Assert.Equal(2, preview.Plate.Parts.Count);
-        Assert.All(preview.Plate.Parts, part => Assert.DoesNotContain(part, plate.Parts));
-        Assert.All(plate.Parts, part => Assert.False(part.HasManualLeadIns)); // The preview is detached.
-
-        var reordered = 0;
-        view.PartsReordered += (_, _) => reordered++;
-        Invoke(form, "ApplyButton_Click", null, EventArgs.Empty);
-
-        Assert.Equal(DialogResult.OK, form.DialogResult);
-        Assert.Equal(CuttingCommitStatus.Applied, form.CommitResult!.Status);
-        Assert.All(plate.Parts, part => Assert.True(part.HasManualLeadIns));
-        Assert.NotNull(plate.CuttingParameters);
-        Assert.NotSame(form.ConfirmedParameters, plate.CuttingParameters);
-        Assert.Equal(1, reordered);
-        Assert.Equal(plate.Parts, view.LayoutParts.Select(layout => layout.BasePart));
-        Assert.All(view.LayoutParts, layout => Assert.True(layout.IsDirty));
-    });
-
-    [Fact]
-    public void BlockedPlate_KeepsApplyDisabledAndShowsTheCurrentParts() => RunSta(() =>
-    {
-        var locked = Square("locked", 1, 1);
-        var crossing = (OpenNest.CNC.Program)locked.Program.Clone();
-        crossing.MoveTo(5, 5); // A locked crossing cannot be repaired by regeneration.
-        Assert.True(locked.RestoreLeadInProgram(crossing, true));
-        var (nest, view) = CreateView(locked);
-        using var editor = view;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters());
-        form.Show();
-        WaitForPlan(form);
-
-        Assert.False(Control<Button>(form, "applyButton").Enabled);
-        var summary = Control<TextBox>(form, "summaryBox").Text;
-        Assert.Contains("Plate 1: blocked", summary);
-        var warnings = Control<DataGridView>(form, "warningGrid");
-        Assert.Contains(warnings.Rows.Cast<DataGridViewRow>(), row =>
-            row.Cells[3].Value?.ToString()?.Contains("Part 1 (locked)") == true);
-        // A refused plate is never previewed; the editor already shows its part numbers.
-        Assert.False(Field<PlateView>(form, "preview").Visible);
-        Assert.Contains("no current, usable preview", Control<Label>(form, "previewLabel").Text);
-        Assert.Null(view.Plate.CuttingParameters);
-    });
-
-    [Fact]
-    public void ClosingWhilePlanning_CancelsAndWaitsForTheWorker() => RunSta(() =>
-    {
-        var (nest, view) = CreateView(Square("a", 1, 1), Square("b", 12, 1));
-        using var editor = view;
-        var programs = view.Plate.Parts.Select(part => part.Program).ToArray();
-        using var entered = new ManualResetEventSlim();
-        using var release = new ManualResetEventSlim();
-        var cancelled = false;
-        var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters())
-        {
-            // Hold the worker until the close request has been checked.
-            BeforePlan = token =>
-            {
-                entered.Set();
-                release.Wait(TimeSpan.FromSeconds(30));
-                cancelled = token.IsCancellationRequested;
-            },
-        };
-        try
-        {
-            form.Show();
-            PumpUntil(() => form.IsPlanning, "planning to start");
-            Assert.True(entered.Wait(TimeSpan.FromSeconds(30)), "The worker did not start.");
-
-            form.Close();
-
-            // The worker still holds the plan; the dialog stays up, cancelling, until it stops.
-            Assert.False(form.IsDisposed);
-            Assert.True(form.Visible);
-            Assert.True(form.IsPlanning);
-            Assert.False(Control<Button>(form, "cancelButton").Enabled);
-            Assert.False(Control<Button>(form, "planButton").Enabled);
-            release.Set();
-            PumpUntil(() => form.IsDisposed, "the dialog to close after cancelling");
-            Observe(form);
-            Assert.True(cancelled);
-            Assert.Equal(programs, view.Plate.Parts.Select(part => part.Program));
-            Assert.All(view.Plate.Parts, part => Assert.False(part.HasManualLeadIns));
-            Assert.Null(view.Plate.CuttingParameters);
-        }
-        finally
-        {
-            release.Set();
-            form.Dispose();
-        }
-    });
-
-    [Fact]
-    public void Constructor_PlansWithItsOwnCopyOfTheSettings() => RunSta(() =>
-    {
-        var (nest, view) = CreateView(Square("a", 1, 1));
-        using var editor = view;
-        var parameters = Parameters();
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, parameters);
-
-        ((LineLeadIn)parameters.ExternalLeadIn).Length = 5;
-
-        Assert.NotSame(parameters, form.ConfirmedParameters);
-        Assert.Equal(0.3, ((LineLeadIn)form.ConfirmedParameters.ExternalLeadIn).Length);
-    });
-
-    [Fact]
-    public void ApplyAfterALiveEdit_ChangesNothingAndReplanRecovers() => RunSta(() =>
-    {
-        var (nest, view) = CreateView(Square("a", 1, 1), Square("b", 12, 1));
-        using var editor = view;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters());
-        form.Show();
-        WaitForPlan(form);
-        var programs = view.Plate.Parts.Select(part => part.Program).ToArray();
-
-        view.Plate.Parts[1].Offset(0, 1);
-        Invoke(form, "ApplyButton_Click", null, EventArgs.Empty);
-
-        Assert.False(form.IsDisposed);
-        Assert.Equal(DialogResult.None, form.DialogResult);
-        Assert.Equal(CuttingCommitStatus.Stale, form.CommitResult!.Status);
-        Assert.Contains("changed after planning", Control<TextBox>(form, "summaryBox").Text);
-        Assert.False(Control<Button>(form, "applyButton").Enabled);
-        Assert.Empty(Control<DataGridView>(form, "warningGrid").Rows.Cast<DataGridViewRow>());
-        Assert.Equal(programs, view.Plate.Parts.Select(part => part.Program));
-        Assert.Null(view.Plate.CuttingParameters);
-
-        Invoke(form, "PlanButton_Click", null, EventArgs.Empty);
-        WaitForPlan(form);
-        Assert.True(Control<Button>(form, "applyButton").Enabled);
-    });
-
-    [Fact]
-    public void BusyEditor_DoesNotStartPlanningUntilItIsFree() => RunSta(() =>
-    {
-        var busy = true;
-        var (nest, view) = CreateView(Square("a", 1, 1));
-        using var editor = view;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters(), () => busy);
-
-        Invoke(form, "StartPlanning");
-
-        Assert.False(form.IsPlanning);
-        Assert.Null(form.Proposal);
-        Assert.Contains("Wait for the current nesting or plate action", Control<TextBox>(form, "summaryBox").Text);
-        busy = false;
-        // Ending a DoEvents loop uninstalls WinForms' ambient context; planning started outside a
-        // message loop must still report progress and results on the dialog's thread.
-        Application.DoEvents();
-        Invoke(form, "StartPlanning");
-        WaitForPlan(form);
-        Assert.True(Control<Button>(form, "applyButton").Enabled);
-    });
-
-    [Fact]
-    public void AllPlates_SkipsEmptyPlatesAndRefusesTheBatchWhenOnePlateIsBlocked() => RunSta(() =>
-    {
-        var nest = new Nest();
-        var first = nest.CreatePlate();
-        first.Parts.Add(Square("open", 1, 1));
-        var second = nest.CreatePlate();
-        var locked = Square("locked", 1, 1);
-        var crossing = (OpenNest.CNC.Program)locked.Program.Clone();
-        crossing.MoveTo(5, 5);
-        Assert.True(locked.RestoreLeadInProgram(crossing, true));
-        second.Parts.Add(locked);
-        nest.CreatePlate(); // An empty plate, like the editor's trailing plate.
-        using var view = new PlateView { Plate = first };
-        using var form = new CuttingPlanForm(view, nest, allPlates: true, Parameters());
-        form.Show();
-        WaitForPlan(form);
-
-        Assert.Equal("Plan Cutting — All Plates", form.Text);
-        Assert.Equal(2, form.Proposal!.Plates.Count);
-        var summary = Control<TextBox>(form, "summaryBox").Text;
-        Assert.Contains("Plate 1: ready.", summary);
-        Assert.Contains("Plate 2: blocked", summary);
-        Assert.DoesNotContain("Plate 3", summary);
-        Assert.False(Control<Button>(form, "applyButton").Enabled);
-        Assert.All(first.Parts, part => Assert.False(part.HasManualLeadIns));
-    });
-
-    [Fact]
-    public void OnePlateDialog_ExcludesTheSentinelFromTheShownTotal() => RunSta(() =>
-    {
-        var (nest, view) = CreateView(Square("a", 1, 1));
-        nest.CreatePlate(); // The editor's trailing empty new-plate sentinel.
-        using var editor = view;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters());
-
-        Assert.StartsWith("Plate 1 of 1, numbered in cutting order:", Control<Label>(form, "previewLabel").Text);
-    });
-
-    [Fact]
-    public void SentinelActivePlate_IsLabeledNotNumberedBeyondTheTotal() => RunSta(() =>
-    {
-        var (nest, _) = CreateView(Square("a", 1, 1));
-        var sentinel = nest.CreatePlate(); // trailing empty new-plate sentinel
-        using var view = new PlateView { Plate = sentinel };
-        using var editor = view;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters());
-
-        var text = Control<Label>(form, "previewLabel").Text;
-        Assert.StartsWith("New plate (empty)", text);
-        Assert.DoesNotContain("Plate 2", text);
-    });
-
-    [Fact]
-    public void UnverifiedPlan_RequiresAcceptanceAndReplanClearsIt() => RunSta(() =>
-    {
-        var program = SquareProgram();
-        program.MoveTo(2, 2); program.LineTo(4, 2); program.LineTo(4, 4);
-        program.LineTo(2, 4); program.LineTo(2, 2);
-        program.MoveTo(4, 2); program.LineTo(6, 2); program.LineTo(6, 4);
-        program.LineTo(4, 4); program.LineTo(4, 2);
-        var part = new Part(new Drawing("touching contours", program), new Vector(1, 1));
-        var (nest, view) = CreateView(part);
-        using var editor = view;
-        using var form = new CuttingPlanForm(view, nest, allPlates: false, Parameters());
-        form.Show();
-        WaitForPlan(form);
-        var accept = Control<CheckBox>(form, "acceptWarningsCheckBox");
-        Assert.True(accept.Visible);
-        Assert.False(accept.Checked);
-        Assert.False(Control<Button>(form, "applyButton").Enabled);
-        Assert.True(Field<PlateView>(form, "preview").Visible);
-        Assert.Contains("UNVERIFIED", Control<Label>(form, "previewLabel").Text);
-        var grid = Control<DataGridView>(form, "warningGrid");
-        Assert.NotEmpty(grid.Rows.Cast<DataGridViewRow>());
-        Assert.Contains(grid.Rows.Cast<DataGridViewRow>(), row =>
-            row.Cells[3].Value?.ToString()?.Contains("Material boundaries") == true);
-        var partRow = grid.Rows.Cast<DataGridViewRow>().First(row => row.Cells[1].Value is int);
-        partRow.Selected = true;
-        Assert.Contains("affected part extent", Control<Label>(form, "previewLabel").Text);
-        Assert.True(Field<PlateView>(form, "preview").Visible);
-        Invoke(form, "ApplyButton_Click", null, EventArgs.Empty);
-        Assert.Null(form.CommitResult);
-        Assert.False(part.HasManualLeadIns);
-        accept.Checked = true;
-        Assert.True(Control<Button>(form, "applyButton").Enabled);
-        Invoke(form, "PlanButton_Click", null, EventArgs.Empty);
-        Assert.Empty(grid.Rows.Cast<DataGridViewRow>()); // No stale warning targets while replanning.
-        WaitForPlan(form);
-        Assert.NotEmpty(grid.Rows.Cast<DataGridViewRow>());
-        Assert.False(accept.Checked);
-        Assert.False(Control<Button>(form, "applyButton").Enabled);
-        accept.Checked = true;
-        Invoke(form, "ApplyButton_Click", null, EventArgs.Empty);
-        Assert.Equal(CuttingCommitStatus.Applied, form.CommitResult!.Status);
-        Assert.True(part.HasManualLeadIns);
-    });
-
-    private static (Nest Nest, PlateView View) CreateView(params Part[] parts)
-    {
-        var nest = new Nest();
-        var plate = nest.CreatePlate();
-        plate.Size = new Size(100, 100);
-        foreach (var part in parts)
-            plate.Parts.Add(part);
-        return (nest, new PlateView { Plate = plate });
-    }
-
-    private static CuttingParameters Parameters() => new()
-    {
-        ExternalLeadIn = new LineLeadIn { Length = 0.3, ApproachAngle = 45 },
-        InternalLeadIn = new LineLeadIn { Length = 0.3, ApproachAngle = 45 },
-        ArcCircleLeadIn = new LineLeadIn { Length = 0.3, ApproachAngle = 45 },
-        ExternalLeadOut = new NoLeadOut(),
-        InternalLeadOut = new NoLeadOut(),
-        ArcCircleLeadOut = new NoLeadOut(),
-    };
-
-    private static Part Square(string name, double x, double y) =>
-        new(new Drawing(name, SquareProgram()), new Vector(x, y));
-
-    private static CNC.Program SquareProgram()
-    {
-        var program = new CNC.Program();
-        program.MoveTo(0, 0);
-        program.LineTo(0, 10);
-        program.LineTo(10, 10);
-        program.LineTo(10, 0);
-        program.LineTo(0, 0);
-        return program;
-    }
-
-    private static void WaitForPlan(CuttingPlanForm form)
-    {
-        PumpUntil(() => form.Proposal != null && !form.IsPlanning, "the plan");
-        Observe(form);
-    }
-
-    // The planning task is already complete here; this rethrows anything its completion raised.
-    private static void Observe(CuttingPlanForm form) => form.PlanningTask.GetAwaiter().GetResult();
-
-    private static void PumpUntil(Func<bool> condition, string what)
-    {
-        var until = DateTime.UtcNow.AddSeconds(60);
-        while (!condition() && DateTime.UtcNow < until)
-        {
-            Application.DoEvents();
-            Thread.Sleep(10);
-        }
-        Assert.True(condition(), $"Timed out waiting for {what}.");
-    }
-
-    private static T Control<T>(Form form, string name) where T : Control =>
-        Assert.IsType<T>(form.Controls.Find(name, true).Single());
-
-    private static T Field<T>(object owner, string name) =>
-        (T)owner.GetType().GetField(name, BindingFlags.Instance | BindingFlags.NonPublic)!.GetValue(owner)!;
-
-    private static void Invoke(CuttingPlanForm form, string method, params object?[] arguments) =>
-        typeof(CuttingPlanForm).GetMethod(method, BindingFlags.Instance | BindingFlags.NonPublic)!
-            .Invoke(form, arguments);
-
-    private static void RunSta(System.Action action) =>
-        StaTestThread.Run(action, TimeSpan.FromMinutes(3), "The STA test did not complete.");
-}
diff --git a/OpenNest.WinForms.Tests/Forms/CuttingUiRetirementTests.cs b/OpenNest.WinForms.Tests/Forms/CuttingUiRetirementTests.cs
new file mode 100644
index 0000000..9d20b79
--- /dev/null
+++ b/OpenNest.WinForms.Tests/Forms/CuttingUiRetirementTests.cs
@@ -0,0 +1,19 @@
+using OpenNest.Forms;
+
+namespace OpenNest.WinForms.Tests.Forms;
+
+public class CuttingUiRetirementTests
+{
+    [Fact]
+    public void EditorAssemblyHasOnlyTheDockedInspectionEntryPoints()
+    {
+        var assembly = typeof(EditNestForm).Assembly;
+        Assert.Null(assembly.GetType("OpenNest.Forms.CuttingPlanForm"));
+        Assert.Null(assembly.GetType("OpenNest.Forms.ValidateNestForm"));
+        Assert.Null(typeof(EditNestForm).GetMethod("PlanCutting"));
+        // Non-editor consumers retain the shared analyzer, not an editor-dependent inspector.
+        Assert.Contains(typeof(OpenNest.Diagnostics.PostVerificationAnalyzer).GetMethods(),
+            method => method.Name == "Analyze" && method.GetParameters().Length > 0
+                && method.GetParameters()[0].ParameterType == typeof(Nest));
+    }
+}
diff --git a/OpenNest.WinForms.Tests/Forms/CuttingValidationPanelTests.cs b/OpenNest.WinForms.Tests/Forms/CuttingValidationPanelTests.cs
index e04c323..d4c5ca3 100644
--- a/OpenNest.WinForms.Tests/Forms/CuttingValidationPanelTests.cs
+++ b/OpenNest.WinForms.Tests/Forms/CuttingValidationPanelTests.cs
@@ -225,6 +225,55 @@ public class CuttingValidationPanelTests
         }
     });
 
+    [Fact]
+    public void OverlapNavigationKeepsAllPlateProgramsAndPosesStable() => RunSta(() =>
+    {
+        using var editor = RapidEditor();
+        var plate = editor.Nest.Plates[1];
+        plate.Parts.Add(new Part(plate.Parts[0].BaseDrawing) { Location = new Vector(2, 2) });
+        editor.Show();
+        editor.PlateManager.LoadAt(0);
+        var parts = editor.Nest.Plates.SelectMany(p => p.Parts).ToArray();
+        var programs = parts.Select(p => p.Program).ToArray();
+        var codes = programs.Select(p => p.Codes.ToArray()).ToArray();
+        var locations = parts.Select(p => p.Location).ToArray();
+        var rotations = parts.Select(p => p.Rotation).ToArray();
+        editor.OpenValidationInspection();
+        var panel = editor.CuttingInspection!;
+        Pump(() => panel.ValidationReport != null && !panel.IsPlanning);
+        var grid = Field<DataGridView>(panel, "warningGrid");
+        Assert.True(grid.ReadOnly);
+        Assert.Equal(DataGridViewSelectionMode.FullRowSelect, grid.SelectionMode);
+        Assert.All(grid.Columns.Cast<DataGridViewColumn>(), c => Assert.Equal(DataGridViewColumnSortMode.NotSortable, c.SortMode));
+        Assert.True(Field<TextBox>(panel, "resultLabel").ReadOnly);
+        var row = grid.Rows.Cast<DataGridViewRow>().Single(r => r.Tag is PostVerificationFinding { Kind: PostVerificationKind.Overlap });
+        row.Selected = true;
+        var view = editor.PlateView;
+        Assert.Same(plate, view.Plate);
+        Assert.NotNull(view.ValidationOverlay.Finding.Overlap);
+        Assert.Contains("centroid", Field<TextBox>(panel, "resultLabel").Text);
+        var scale = view.ViewScale;
+        InvokeView(view, "OnMouseWheel", new MouseEventArgs(MouseButtons.None, 0, 100, 100, 120));
+        Assert.True(view.ViewScale > scale);
+        var viewport = view.CaptureViewport();
+        InvokeView(view, "OnMouseMove", new MouseEventArgs(MouseButtons.Middle, 0, 120, 110, 0));
+        Assert.NotEqual(viewport.Origin, view.CaptureViewport().Origin);
+        view.SelectAll();
+        InvokeView(view, "OnKeyDown", new KeyEventArgs(Keys.Delete));
+        InvokeView(view, "ProcessDialogKey", Keys.Right);
+        panel.RequestClose();
+        Assert.Equal(parts, editor.Nest.Plates.SelectMany(p => p.Parts));
+        Assert.Equal(programs, parts.Select(p => p.Program));
+        for (var i = 0; i < programs.Length; i++) Assert.Equal(codes[i], programs[i].Codes.ToArray());
+        Assert.Equal(locations, parts.Select(p => p.Location));
+        Assert.Equal(rotations, parts.Select(p => p.Rotation));
+        Assert.Null(view.ValidationOverlay.Finding);
+        Assert.False(view.ValidationOverlay.IsAnimating);
+    });
+
+    private static void InvokeView(Control target, string name, params object[] args) => target.GetType()
+        .GetMethod(name, BindingFlags.NonPublic | BindingFlags.Instance)!.Invoke(target, args);
+
     private static EditNestForm RapidEditor()
     {
         var nest = new Nest();
diff --git a/OpenNest.WinForms.Tests/Forms/ValidateNestFormTests.cs b/OpenNest.WinForms.Tests/Forms/ValidateNestFormTests.cs
deleted file mode 100644
index f452a0e..0000000
--- a/OpenNest.WinForms.Tests/Forms/ValidateNestFormTests.cs
+++ /dev/null
@@ -1,302 +0,0 @@
-using System.Drawing;
-using System.Runtime.ExceptionServices;
-using System.Windows.Forms;
-using OpenNest.CNC;
-using OpenNest.Controls;
-using OpenNest.Diagnostics;
-using OpenNest.Forms;
-using OpenNest.Geometry;
-
-namespace OpenNest.WinForms.Tests.Forms;
-
-public class ValidateNestFormTests
-{
-    [Fact]
-    public void RapidContactCrosshairIsDrawnAtContactAndClearedWithFinding()
-    {
-        RunSta(() =>
-        {
-            using var view = new PlateView();
-            view.ShowValidationFinding(new PostVerificationFinding(PostVerificationKind.RapidCrossing,
-                1, 2, 1, "crossing")
-            {
-                RapidStart = new Vector(-1, 0),
-                RapidEnd = new Vector(1, 0),
-                ContactPoints = Array.AsReadOnly(new[] { Vector.Zero })
-            });
-            using var bitmap = new Bitmap(120, 120);
-            using var graphics = Graphics.FromImage(bitmap);
-            graphics.TranslateTransform(60, 60);
-            graphics.Clear(Color.Black);
-            view.ValidationOverlay.Draw(graphics);
-            // Off the horizontal rapid, on the contact's vertical crosshair.
-            var pixel = bitmap.GetPixel(60, 65);
-            Assert.True(pixel.R > 150 && pixel.B > 50 && pixel.G < 100);
-            view.ClearValidationFinding();
-            graphics.Clear(Color.Black);
-            view.ValidationOverlay.Draw(graphics);
-            Assert.Equal(Color.Black.ToArgb(), bitmap.GetPixel(60, 65).ToArgb());
-        });
-    }
-
-#pragma warning disable xUnit1031 // Completed tasks on a dedicated STA thread.
-    [Fact]
-    public void GridNavigatesMainViewAndRestoresViewportOnDisposal()
-    {
-        RunSta(() =>
-        {
-            var nest = new Nest("interactive inspection");
-            var program = new CNC.Program();
-            program.MoveTo(0, 0);
-            program.LineTo(5, 0);
-            program.LineTo(5, 5);
-            program.LineTo(0, 5);
-            program.LineTo(0, 0);
-            nest.CreatePlate().Parts.Add(new Part(new Drawing("first", program)));
-            var second = nest.CreatePlate();
-            second.Parts.Add(new Part(new Drawing("second", program)));
-            second.Parts.Add(new Part(second.Parts[0].BaseDrawing) { Location = new Vector(2, 2) });
-            using var editor = new EditNestForm(nest);
-            editor.Show();
-            editor.PlateManager.LoadAt(0);
-            var view = editor.PlateView;
-            view.ZoomToArea(-10, -10, 40, 40);
-            var viewport = view.CaptureViewport();
-            view.OverlapDisplay = OverlapDisplayMode.Centroids;
-            using (var form = new ValidateNestForm(editor,
-                (value, token) => Task.FromResult(PostVerificationAnalyzer.Analyze(value, token))))
-            {
-                form.Show(editor);
-                form.ValidateAsync().GetAwaiter().GetResult();
-                Assert.True(form.TopLevel);
-                Assert.False(form.Modal);
-                Assert.True(editor.Enabled);
-                Assert.True(view.Enabled);
-                Assert.True(view.InspectionOnly);
-                var grid = Find<DataGridView>(form, "warningGrid");
-                Assert.True(grid.ReadOnly);
-                Assert.Equal(DataGridViewSelectionMode.FullRowSelect, grid.SelectionMode);
-                var row = grid.Rows.Cast<DataGridViewRow>().Single(row =>
-                    row.Tag is PostVerificationFinding { Kind: PostVerificationKind.Overlap });
-                grid.CurrentCell = row.Cells[0];
-                Assert.Same(second, view.Plate);
-                Assert.Equal(1, editor.PlateManager.CurrentIndex);
-                Assert.NotNull(view.ValidationOverlay.Finding.Overlap);
-                Assert.True(view.ValidationOverlay.IsAnimating);
-                using var bitmap = new Bitmap(view.Width, view.Height);
-                view.DrawToBitmap(bitmap, view.ClientRectangle);
-                Assert.Contains("centroid", Find<TextBox>(form, "reportBox").Text);
-                view.SelectAll();
-                var scale = view.ViewScale;
-                Invoke(view, "OnMouseWheel", new MouseEventArgs(MouseButtons.None, 0, 100, 100, 120));
-                Assert.True(view.ViewScale > scale);
-                var pan = view.CaptureViewport();
-                Invoke(view, "OnMouseMove", new MouseEventArgs(MouseButtons.Middle, 0, 120, 110, 0));
-                Assert.NotEqual(pan.Origin, view.CaptureViewport().Origin);
-                Invoke(view, "OnKeyDown", new KeyEventArgs(Keys.Delete));
-                Invoke(view, "ProcessDialogKey", Keys.Right);
-                Invoke(view, "OnMouseDown", new MouseEventArgs(MouseButtons.Middle, 1, 120, 110, 0));
-                Invoke(view, "OnMouseUp", new MouseEventArgs(MouseButtons.Middle, 1, 120, 110, 0));
-                Assert.Equal(2, second.Parts.Count);
-                Assert.All(second.Parts, part => Assert.Equal(0, part.Rotation));
-            }
-            Assert.Same(nest.Plates[0], view.Plate);
-            Assert.Equal(viewport, view.CaptureViewport());
-            Assert.Equal(OverlapDisplayMode.Centroids, view.OverlapDisplay);
-            Assert.Null(view.ValidationOverlay.Finding);
-            Assert.False(view.ValidationOverlay.IsAnimating);
-            Assert.False(view.InspectionOnly);
-            Assert.Equal(new Vector(2, 2), second.Parts[1].Location);
-        });
-    }
-
-    [Fact]
-    public void ModelessCancellationKeepsEditingLockedUntilWorkerStops()
-    {
-        RunSta(() =>
-        {
-            var pending = new TaskCompletionSource<PostVerificationReport>();
-            using var editor = new EditNestForm(new Nest("inspection"));
-            editor.Show();
-            using var form = new ValidateNestForm(editor, (_, _) => pending.Task);
-            form.Show(editor);
-            var validation = form.ValidateAsync();
-            Assert.False(validation.IsCompleted);
-            Assert.True(editor.Enabled);
-            Assert.True(editor.PlateView.Enabled);
-            Assert.True(editor.PlateView.InspectionOnly);
-            form.Close();
-            Assert.True(form.Visible);
-            Assert.True(editor.PlateView.InspectionOnly);
-            pending.SetCanceled();
-            var timeout = System.Diagnostics.Stopwatch.StartNew();
-            while (!form.IsDisposed && timeout.Elapsed < TimeSpan.FromSeconds(5))
-                Application.DoEvents();
-            Assert.True(form.IsDisposed);
-            Assert.False(editor.PlateView.InspectionOnly);
-        });
-    }
-
-    [Fact]
-    public void PlateSwitchClearsAnimation()
-    {
-        RunSta(() =>
-        {
-            using var view = new PlateView();
-            view.ShowValidationFinding(new PostVerificationFinding(PostVerificationKind.MissingLeadIn,
-                1, 1, null, "missing")
-            { Location = new Vector(3, 4) });
-            Assert.True(view.ValidationOverlay.IsAnimating);
-            view.Plate = new Plate();
-            Assert.False(view.ValidationOverlay.IsAnimating);
-            Assert.Null(view.ValidationOverlay.Finding);
-        });
-    }
-
-    [Fact]
-    public void ChecksAllPlatesWithoutChangingProgramsOrPlacements()
-    {
-        RunSta(() =>
-        {
-            var nest = new Nest("PEP inspection");
-            var program = new CNC.Program();
-            program.Codes.Add(new RapidMove(0, 0));
-            program.Codes.Add(new LinearMove(5, 0));
-            program.Codes.Add(new LinearMove(5, 5));
-            program.Codes.Add(new LinearMove(0, 5));
-            program.Codes.Add(new LinearMove(0, 0));
-            var first = new Part(new Drawing("square", program));
-            var second = new Part(first.BaseDrawing);
-            nest.CreatePlate().Parts.Add(first);
-            nest.CreatePlate().Parts.Add(second);
-            var firstProgram = first.Program;
-            var secondProgram = second.Program;
-            var firstCodes = firstProgram.Codes.ToArray();
-            var location = first.Location;
-            var rotation = first.Rotation;
-            using var form = new ValidateNestForm(nest,
-                (value, token) => Task.FromResult(PostVerificationAnalyzer.Analyze(value, token)));
-
-            form.ValidateAsync().GetAwaiter().GetResult();
-
-            var report = Find<TextBox>(form, "reportBox");
-            Assert.True(report.ReadOnly);
-            Assert.Contains("Plate 1, part 1", report.Text);
-            Assert.Contains("Plate 2, part 1", report.Text);
-            Assert.DoesNotContain("Post processor", report.Text);
-            Assert.Contains("Warnings found", Find<Label>(form, "summaryLabel").Text);
-            Assert.Same(first, nest.Plates[0].Parts[0]);
-            Assert.Same(second, nest.Plates[1].Parts[0]);
-            Assert.Same(firstProgram, first.Program);
-            Assert.Same(secondProgram, second.Program);
-            Assert.Equal(firstCodes, first.Program.Codes.ToArray());
-            Assert.Equal(location, first.Location);
-            Assert.Equal(rotation, first.Rotation);
-            Assert.Same(Find<Button>(form, "closeButton"), form.AcceptButton);
-            Assert.Same(form.AcceptButton, form.CancelButton);
-            Assert.Empty(form.Controls.Find("postButton", true));
-        });
-    }
-
-    [Theory]
-    [InlineData(false)]
-    [InlineData(true)]
-    public void DistinguishesClearAndIncompleteChecks(bool incomplete)
-    {
-        RunSta(() =>
-        {
-            var nest = new Nest("inspection");
-            if (incomplete)
-                nest.CreatePlate().Parts.Add(new Part(new Drawing("invalid", new CNC.Program())));
-            using var form = new ValidateNestForm(nest,
-                (value, token) => Task.FromResult(PostVerificationAnalyzer.Analyze(value, token)));
-            form.ValidateAsync().GetAwaiter().GetResult();
-            Assert.Contains(incomplete ? "Validation incomplete" : "No warnings found",
-                Find<Label>(form, "summaryLabel").Text);
-        });
-    }
-
-    [Fact]
-    public void FailureIsReportedWithoutAnAllClear()
-    {
-        RunSta(() =>
-        {
-            using var form = new ValidateNestForm(new Nest("inspection"),
-                (_, _) => Task.FromException<PostVerificationReport>(new InvalidOperationException("test failure")));
-            form.ValidateAsync().GetAwaiter().GetResult();
-            Assert.Contains("Validation failed", Find<Label>(form, "summaryLabel").Text);
-            Assert.Contains("test failure", Find<TextBox>(form, "reportBox").Text);
-            Assert.Equal("Close", Find<Button>(form, "closeButton").Text);
-        });
-    }
-
-    [Theory]
-    [InlineData("Cancel")]
-    [InlineData("Escape")]
-    [InlineData("Close")]
-    public void RealModalCancellationKeepsOwnerDisabledUntilWorkerStops(string action)
-    {
-        RunSta(() =>
-        {
-            var pending = new TaskCompletionSource<PostVerificationReport>();
-            using var owner = new Form();
-            using var form = new ValidateNestForm(new Nest("inspection"), (_, _) => pending.Task);
-            Exception? failure = null;
-            owner.Show();
-            using var timeout = new System.Windows.Forms.Timer { Interval = 10000 };
-            timeout.Tick += (_, _) =>
-            {
-                failure ??= new TimeoutException("Modal cancellation did not finish.");
-                pending.TrySetCanceled();
-                form.Close();
-            };
-            form.Shown += (_, _) => form.BeginInvoke(new System.Action(() =>
-            {
-                try
-                {
-                    Assert.False(IsWindowEnabled(owner.Handle));
-                    if (action == "Cancel")
-                        Find<Button>(form, "closeButton").PerformClick();
-                    else if (action == "Escape")
-                        Invoke(form, "ProcessDialogKey", Keys.Escape);
-                    else
-                        form.Close();
-
-                    // ShowDialog must stay active while the worker ignores cancellation.
-                    Assert.True(form.Visible);
-                    Assert.False(IsWindowEnabled(owner.Handle));
-                    Assert.False(Find<Button>(form, "closeButton").Enabled);
-                }
-                catch (Exception ex)
-                {
-                    failure = ex;
-                }
-                finally
-                {
-                    pending.TrySetCanceled();
-                }
-            }));
-            timeout.Start();
-            var result = form.ShowDialog(owner);
-            timeout.Stop();
-            Assert.Equal(DialogResult.Cancel, result);
-            Assert.True(IsWindowEnabled(owner.Handle));
-            if (failure != null)
-                ExceptionDispatchInfo.Capture(failure).Throw();
-        });
-    }
-
-    [System.Runtime.InteropServices.DllImport("user32.dll")]
-    [return: System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.Bool)]
-    private static extern bool IsWindowEnabled(IntPtr window);
-
-    private static void Invoke(Control form, string method, params object?[] arguments) =>
-        form.GetType().GetMethod(method, System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic)!
-            .Invoke(form, arguments);
-
-    private static void RunSta(System.Action action) =>
-        StaTestThread.Run(action, TimeSpan.FromSeconds(30), "STA validation test timed out.");
-
-    private static T Find<T>(Form form, string name) where T : Control =>
-        Assert.IsType<T>(form.Controls.Find(name, true).Single());
-}
diff --git a/OpenNest/Forms/CuttingInspectionPanel.cs b/OpenNest/Forms/CuttingInspectionPanel.cs
index 58e37a2..b28c87c 100644
--- a/OpenNest/Forms/CuttingInspectionPanel.cs
+++ b/OpenNest/Forms/CuttingInspectionPanel.cs
@@ -431,6 +431,7 @@ internal sealed class CuttingInspectionPanel : UserControl
     }
 
     private void UpdateApply() => applyButton.Enabled = Mode == CuttingInspectionMode.Plan && !invalidated && !IsPlanning
+        && plates.Any(item => item.Parts.Count > 0)
         && (Proposal?.CanApply == true || Proposal?.CanApplyWithWarnings == true && acceptWarningsCheckBox.Checked);
 
     private bool IsPreviewCurrent()
@@ -453,6 +454,13 @@ internal sealed class CuttingInspectionPanel : UserControl
         selectedPlate = index;
         view.ClearProposalDisplay();
         view.ClearValidationFinding();
+        if (plates[index].Parts.Count == 0)
+        {
+            preview = null;
+            previewLabel.Text = "New plate (empty)";
+            SetPlanning(false);
+            return;
+        }
         preview = inspection.RefreshPreview(index); // Only the guarded authority may clone programs.
         SetPlanning(false);
         if (preview == null)
diff --git a/OpenNest/Forms/CuttingPlanForm.Designer.cs b/OpenNest/Forms/CuttingPlanForm.Designer.cs
deleted file mode 100644
index 31418d2..0000000
--- a/OpenNest/Forms/CuttingPlanForm.Designer.cs
+++ /dev/null
@@ -1,291 +0,0 @@
-using System.Drawing;
-using System.Windows.Forms;
-
-namespace OpenNest.Forms;
-
-partial class CuttingPlanForm
-{
-    private System.ComponentModel.IContainer components = null;
-
-    protected override void Dispose(bool disposing)
-    {
-        if (disposing)
-        {
-            planning?.Cancel();
-            components?.Dispose();
-        }
-        base.Dispose(disposing);
-    }
-
-    private void InitializeComponent()
-    {
-        layout = new TableLayoutPanel();
-        settingsPanel = new TableLayoutPanel();
-        settingsLabel = new Label();
-        settingsButton = new Button();
-        optionsPanel = new FlowLayoutPanel();
-        keepOrderCheckBox = new CheckBox();
-        acceptWarningsCheckBox = new CheckBox();
-        planButton = new Button();
-        split = new SplitContainer();
-        previewLayout = new TableLayoutPanel();
-        previewLabel = new Label();
-        previewPanel = new Panel();
-        summaryBox = new TextBox();
-        statusLabel = new Label();
-        buttonsPanel = new FlowLayoutPanel();
-        applyButton = new Button();
-        cancelButton = new Button();
-        layout.SuspendLayout();
-        settingsPanel.SuspendLayout();
-        optionsPanel.SuspendLayout();
-        ((System.ComponentModel.ISupportInitialize)split).BeginInit();
-        split.Panel1.SuspendLayout();
-        split.Panel2.SuspendLayout();
-        split.SuspendLayout();
-        previewLayout.SuspendLayout();
-        buttonsPanel.SuspendLayout();
-        SuspendLayout();
-        //
-        // layout
-        //
-        layout.ColumnCount = 1;
-        layout.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
-        layout.Controls.Add(settingsPanel, 0, 0);
-        layout.Controls.Add(optionsPanel, 0, 1);
-        layout.Controls.Add(split, 0, 2);
-        layout.Controls.Add(statusLabel, 0, 3);
-        layout.Controls.Add(acceptWarningsCheckBox, 0, 4);
-        layout.Controls.Add(buttonsPanel, 0, 5);
-        layout.Dock = DockStyle.Fill;
-        layout.Name = "layout";
-        layout.RowCount = 6;
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.RowStyles.Add(new RowStyle(SizeType.Percent, 100F));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.TabIndex = 0;
-        //
-        // settingsPanel
-        //
-        settingsPanel.AutoSize = true;
-        settingsPanel.ColumnCount = 2;
-        settingsPanel.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
-        settingsPanel.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
-        settingsPanel.Controls.Add(settingsLabel, 0, 0);
-        settingsPanel.Controls.Add(settingsButton, 1, 0);
-        settingsPanel.Dock = DockStyle.Fill;
-        settingsPanel.Margin = new Padding(0, 0, 0, 4);
-        settingsPanel.Name = "settingsPanel";
-        settingsPanel.RowCount = 1;
-        settingsPanel.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        settingsPanel.TabIndex = 0;
-        //
-        // settingsLabel
-        //
-        settingsLabel.Anchor = AnchorStyles.Left | AnchorStyles.Right;
-        settingsLabel.AutoSize = true;
-        settingsLabel.Name = "settingsLabel";
-        settingsLabel.TabIndex = 0;
-        settingsLabel.Text = "Lead-ins:";
-        //
-        // settingsButton
-        //
-        settingsButton.AutoSize = true;
-        settingsButton.Name = "settingsButton";
-        settingsButton.Size = new Size(130, 30);
-        settingsButton.TabIndex = 1;
-        settingsButton.Text = "Cutting &Settings...";
-        settingsButton.UseVisualStyleBackColor = true;
-        settingsButton.Click += SettingsButton_Click;
-        //
-        // optionsPanel
-        //
-        optionsPanel.AutoSize = true;
-        optionsPanel.Controls.Add(keepOrderCheckBox);
-        optionsPanel.Controls.Add(planButton);
-        optionsPanel.Dock = DockStyle.Fill;
-        optionsPanel.Margin = new Padding(0, 0, 0, 4);
-        optionsPanel.Name = "optionsPanel";
-        optionsPanel.TabIndex = 1;
-        optionsPanel.WrapContents = false;
-        //
-        // keepOrderCheckBox
-        //
-        keepOrderCheckBox.Anchor = AnchorStyles.Left;
-        keepOrderCheckBox.AutoSize = true;
-        keepOrderCheckBox.Margin = new Padding(3, 3, 12, 3);
-        keepOrderCheckBox.Name = "keepOrderCheckBox";
-        keepOrderCheckBox.TabIndex = 0;
-        keepOrderCheckBox.Text = "&Keep the current part order";
-        keepOrderCheckBox.UseVisualStyleBackColor = true;
-        keepOrderCheckBox.CheckedChanged += KeepOrderCheckBox_CheckedChanged;
-        //
-        // planButton
-        //
-        planButton.AutoSize = true;
-        planButton.Name = "planButton";
-        planButton.Size = new Size(85, 30);
-        planButton.TabIndex = 1;
-        planButton.Text = "&Replan";
-        planButton.UseVisualStyleBackColor = true;
-        planButton.Click += PlanButton_Click;
-        //
-        // split
-        //
-        split.Dock = DockStyle.Fill;
-        split.Name = "split";
-        split.TabIndex = 2;
-        //
-        // split.Panel1
-        //
-        split.Panel1.Controls.Add(previewLayout);
-        //
-        // split.Panel2
-        //
-        split.Panel2.Controls.Add(summaryBox);
-        //
-        // previewLayout
-        //
-        previewLayout.ColumnCount = 1;
-        previewLayout.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
-        previewLayout.Controls.Add(previewLabel, 0, 0);
-        previewLayout.Controls.Add(previewPanel, 0, 1);
-        previewLayout.Dock = DockStyle.Fill;
-        previewLayout.Margin = new Padding(0);
-        previewLayout.Name = "previewLayout";
-        previewLayout.RowCount = 2;
-        previewLayout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        previewLayout.RowStyles.Add(new RowStyle(SizeType.Percent, 100F));
-        previewLayout.TabIndex = 0;
-        //
-        // previewLabel
-        //
-        previewLabel.AutoSize = true;
-        previewLabel.Dock = DockStyle.Fill;
-        previewLabel.Name = "previewLabel";
-        previewLabel.TabIndex = 0;
-        previewLabel.Text = "Preview:";
-        //
-        // previewPanel
-        //
-        previewPanel.BorderStyle = BorderStyle.FixedSingle;
-        previewPanel.Dock = DockStyle.Fill;
-        previewPanel.Name = "previewPanel";
-        previewPanel.TabIndex = 1;
-        //
-        // summaryBox
-        //
-        summaryBox.Dock = DockStyle.Fill;
-        summaryBox.Multiline = true;
-        summaryBox.Name = "summaryBox";
-        summaryBox.ReadOnly = true;
-        summaryBox.ScrollBars = ScrollBars.Vertical;
-        summaryBox.TabIndex = 0;
-        //
-        // statusLabel
-        //
-        statusLabel.AutoSize = true;
-        statusLabel.Dock = DockStyle.Fill;
-        statusLabel.Margin = new Padding(3, 6, 3, 0);
-        statusLabel.Name = "statusLabel";
-        statusLabel.TabIndex = 3;
-        //
-        // acceptWarningsCheckBox
-        //
-        acceptWarningsCheckBox.AutoSize = true;
-        acceptWarningsCheckBox.Dock = DockStyle.Fill;
-        acceptWarningsCheckBox.Name = "acceptWarningsCheckBox";
-        acceptWarningsCheckBox.Text = "I reviewed the warnings. Apply this unverified plan.";
-        acceptWarningsCheckBox.Visible = false;
-        acceptWarningsCheckBox.TabIndex = 4;
-        acceptWarningsCheckBox.CheckedChanged += AcceptWarningsCheckBox_CheckedChanged;
-        //
-        // buttonsPanel
-        //
-        buttonsPanel.AutoSize = true;
-        buttonsPanel.Controls.Add(cancelButton);
-        buttonsPanel.Controls.Add(applyButton);
-        buttonsPanel.Dock = DockStyle.Fill;
-        buttonsPanel.FlowDirection = FlowDirection.RightToLeft;
-        buttonsPanel.Margin = new Padding(0, 8, 0, 0);
-        buttonsPanel.Name = "buttonsPanel";
-        buttonsPanel.TabIndex = 5;
-        buttonsPanel.WrapContents = false;
-        //
-        // applyButton
-        //
-        applyButton.AutoSize = true;
-        applyButton.Enabled = false;
-        applyButton.Name = "applyButton";
-        applyButton.Size = new Size(85, 30);
-        applyButton.TabIndex = 1;
-        applyButton.Text = "&Apply";
-        applyButton.UseVisualStyleBackColor = true;
-        applyButton.Click += ApplyButton_Click;
-        //
-        // cancelButton
-        //
-        cancelButton.AutoSize = true;
-        cancelButton.DialogResult = DialogResult.Cancel;
-        cancelButton.Name = "cancelButton";
-        cancelButton.Size = new Size(85, 30);
-        cancelButton.TabIndex = 0;
-        cancelButton.Text = "Cancel";
-        cancelButton.UseVisualStyleBackColor = true;
-        //
-        // CuttingPlanForm
-        //
-        AcceptButton = planButton;
-        AutoScaleDimensions = new SizeF(7F, 15F);
-        AutoScaleMode = AutoScaleMode.Font;
-        CancelButton = cancelButton;
-        ClientSize = new Size(940, 620);
-        Controls.Add(layout);
-        Font = new Font("Segoe UI", 9F, FontStyle.Regular, GraphicsUnit.Point);
-        MinimizeBox = false;
-        MinimumSize = new Size(700, 480);
-        Name = "CuttingPlanForm";
-        Padding = new Padding(12);
-        ShowIcon = false;
-        ShowInTaskbar = false;
-        StartPosition = FormStartPosition.CenterParent;
-        Text = "Plan Cutting";
-        layout.ResumeLayout(false);
-        layout.PerformLayout();
-        settingsPanel.ResumeLayout(false);
-        settingsPanel.PerformLayout();
-        optionsPanel.ResumeLayout(false);
-        optionsPanel.PerformLayout();
-        split.Panel1.ResumeLayout(false);
-        split.Panel2.ResumeLayout(false);
-        split.Panel2.PerformLayout();
-        ((System.ComponentModel.ISupportInitialize)split).EndInit();
-        split.ResumeLayout(false);
-        previewLayout.ResumeLayout(false);
-        previewLayout.PerformLayout();
-        buttonsPanel.ResumeLayout(false);
-        buttonsPanel.PerformLayout();
-        ResumeLayout(false);
-    }
-
-    private TableLayoutPanel layout;
-    private TableLayoutPanel settingsPanel;
-    private Label settingsLabel;
-    private Button settingsButton;
-    private FlowLayoutPanel optionsPanel;
-    private CheckBox keepOrderCheckBox;
-    private CheckBox acceptWarningsCheckBox;
-    private Button planButton;
-    private SplitContainer split;
-    private TableLayoutPanel previewLayout;
-    private Label previewLabel;
-    private Panel previewPanel;
-    private TextBox summaryBox;
-    private Label statusLabel;
-    private FlowLayoutPanel buttonsPanel;
-    private Button applyButton;
-    private Button cancelButton;
-}
diff --git a/OpenNest/Forms/CuttingPlanForm.cs b/OpenNest/Forms/CuttingPlanForm.cs
deleted file mode 100644
index c109d2e..0000000
--- a/OpenNest/Forms/CuttingPlanForm.cs
+++ /dev/null
@@ -1,514 +0,0 @@
-using System;
-using System.Drawing;
-using System.Linq;
-using System.Text.RegularExpressions;
-using System.Threading;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-using OpenNest.CNC.CuttingPlanning;
-using OpenNest.CNC.CuttingStrategy;
-using OpenNest.Controls;
-using OpenNest.Engine.CuttingPlanning;
-
-namespace OpenNest.Forms;
-
-/// <summary>
-/// Plans part order and lead-ins for the active plate or every plate, previews the result and
-/// applies it all-or-nothing through the cutting planner. Nothing live changes before Apply.
-/// </summary>
-public partial class CuttingPlanForm : Form
-{
-    private readonly PlateView plateView;
-    private readonly Plate activePlate;
-    private readonly Plate[] plates;
-    private readonly int[] plateNumbers;
-    private readonly Func<bool> isOperationBusy;
-    private readonly string unit;
-    private readonly PlateView preview;
-    private readonly DataGridView warningGrid;
-    private bool populatingWarnings;
-    private readonly SynchronizationContext uiContext;
-    private readonly string previewText;
-    private CuttingParameters parameters;
-    private CancellationTokenSource planning;
-    private CuttingPlanProposal proposal;
-    private int generation;
-    private bool closeRequested;
-
-    /// <param name="plateView">The editor's view of the active plate.</param>
-    /// <param name="nest">The nest that owns the active plate.</param>
-    /// <param name="allPlates">Plan every plate that has parts instead of only the active plate.</param>
-    /// <param name="parameters">Cutting settings to start from; the form keeps its own copy.</param>
-    /// <param name="isOperationBusy">Reports a nesting or plate operation that must finish first.</param>
-    public CuttingPlanForm(PlateView plateView, Nest nest, bool allPlates, CuttingParameters parameters,
-        Func<bool> isOperationBusy = null)
-    {
-        this.plateView = plateView ?? throw new ArgumentNullException(nameof(plateView));
-        ArgumentNullException.ThrowIfNull(nest);
-        ArgumentNullException.ThrowIfNull(parameters);
-        // An owned copy: later edits to the caller's settings objects cannot change this plan.
-        this.parameters = CuttingParametersSerializer.Deserialize(CuttingParametersSerializer.Serialize(parameters));
-        activePlate = plateView.Plate ?? throw new ArgumentException("An active plate is required.", nameof(plateView));
-        var all = nest.Plates.ToList();
-        if (!all.Contains(activePlate))
-            throw new ArgumentException("The active plate is not in this nest.", nameof(nest));
-        plates = allPlates ? all.Where(p => p.Parts.Count > 0).ToArray() : new[] { activePlate };
-        if (plates.Length == 0)
-            plates = new[] { activePlate };
-        plateNumbers = plates.Select(p => all.IndexOf(p) + 1).ToArray();
-        this.isOperationBusy = isOperationBusy;
-        unit = UnitsHelper.GetShortString(nest.Units);
-        InitializeComponent();
-        StartPosition = FormStartPosition.Manual;
-        warningGrid = new DataGridView
-        {
-            Name = "warningGrid",
-            Dock = DockStyle.Fill,
-            ReadOnly = true,
-            AllowUserToAddRows = false,
-            AllowUserToDeleteRows = false,
-            MultiSelect = false,
-            SelectionMode = DataGridViewSelectionMode.FullRowSelect,
-            AutoGenerateColumns = false,
-            RowHeadersVisible = false,
-            BackgroundColor = SystemColors.Window,
-        };
-        warningGrid.Columns.Add(new DataGridViewTextBoxColumn
-        {
-            HeaderText = "Plate",
-            Width = 58,
-            SortMode = DataGridViewColumnSortMode.NotSortable
-        });
-        warningGrid.Columns.Add(new DataGridViewTextBoxColumn
-        {
-            HeaderText = "Part",
-            Width = 58,
-            SortMode = DataGridViewColumnSortMode.NotSortable
-        });
-        warningGrid.Columns.Add(new DataGridViewTextBoxColumn
-        {
-            HeaderText = "With",
-            Width = 58,
-            SortMode = DataGridViewColumnSortMode.NotSortable
-        });
-        warningGrid.Columns.Add(new DataGridViewTextBoxColumn
-        {
-            HeaderText = "Warning / finding",
-            AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill,
-            SortMode = DataGridViewColumnSortMode.NotSortable
-        });
-        warningGrid.SelectionChanged += WarningGrid_SelectionChanged;
-        var findingsLayout = new TableLayoutPanel { Dock = DockStyle.Fill, RowCount = 2, ColumnCount = 1 };
-        findingsLayout.RowStyles.Add(new RowStyle(SizeType.Percent, 30));
-        findingsLayout.RowStyles.Add(new RowStyle(SizeType.Percent, 70));
-        summaryBox.Dock = DockStyle.Fill;
-        findingsLayout.Controls.Add(summaryBox, 0, 0);
-        findingsLayout.Controls.Add(warningGrid, 0, 1);
-        split.Panel2.Controls.Add(findingsLayout);
-        // Keep the batch outcome visible; every individual diagnostic lives in the grid.
-        summaryBox.MaxLength = int.MaxValue;
-        uiContext = SynchronizationContext.Current ?? new WindowsFormsSynchronizationContext();
-
-        preview = new PlateView
-        {
-            Dock = DockStyle.Fill,
-            AllowSelect = false,
-            AllowDrop = false,
-            DrawOrigin = false,
-            DrawRapid = true,
-            Cursor = Cursors.Default,
-            TabStop = false,
-            Visible = false,
-        };
-        preview.SizeChanged += (_, _) =>
-        {
-            if (preview.Visible)
-                preview.ZoomToFit();
-        };
-        previewPanel.Controls.Add(preview);
-
-        if (allPlates)
-        {
-            Text = "Plan Cutting — All Plates";
-            applyButton.Text = "&Apply to All Plates";
-        }
-        // Display-only numbering: the trailing empty new-plate sentinel is excluded from the
-        // "of M" total; plateNumbers keep real collection positions for the batch summary.
-        var displayCount = PlateDisplayNumbering.DisplayedPlateCount(all);
-        var activeNumber = PlateDisplayNumbering.DisplayedPlateNumber(all, all.IndexOf(activePlate));
-        previewText = activeNumber == null
-            ? "New plate (empty) has no parts; plates with parts are listed on the right."
-            : plates.Contains(activePlate)
-                ? $"Plate {activeNumber} of {displayCount}, numbered in cutting order:"
-                : $"Plate {activeNumber} has no parts; plates with parts are listed on the right.";
-        previewLabel.Text = previewText;
-        ShowSettings();
-    }
-
-    /// <summary>The settings the operator confirmed; meaningful after an OK result.</summary>
-    public CuttingParameters ConfirmedParameters => parameters;
-
-    /// <summary>The commit outcome of the last Apply, or null if Apply never ran.</summary>
-    public CuttingCommitResult CommitResult { get; private set; }
-
-    internal Task PlanningTask { get; private set; } = Task.CompletedTask;
-
-    internal CuttingPlanProposal Proposal => proposal;
-
-    internal bool IsPlanning => planning != null;
-
-    /// <summary>Test seam: runs on the worker, before planning, with the run's cancellation token.</summary>
-    internal Action<CancellationToken> BeforePlan { get; set; }
-
-    protected override void OnLoad(EventArgs e)
-    {
-        base.OnLoad(e);
-        // Use the database browser's owner-monitor sizing, without maximizing a modal window.
-        var area = Screen.FromControl(Owner ?? this).WorkingArea;
-        var width = System.Math.Min(area.Width, System.Math.Max(MinimumSize.Width, area.Width * 9 / 10));
-        var height = System.Math.Min(area.Height, System.Math.Max(MinimumSize.Height, area.Height * 9 / 10));
-        Bounds = new Rectangle(area.Left + (area.Width - width) / 2,
-            area.Top + (area.Height - height) / 2, width, height);
-        // Min sizes and the splitter only fit once the container has its real size.
-        split.Panel1MinSize = 200;
-        split.Panel2MinSize = 220;
-        var widest = split.Width - split.Panel2MinSize - split.SplitterWidth;
-        if (widest > split.Panel1MinSize)
-            split.SplitterDistance = System.Math.Clamp(split.Width * 3 / 5, split.Panel1MinSize, widest);
-    }
-
-    protected override void OnShown(EventArgs e)
-    {
-        base.OnShown(e);
-        StartPlanning();
-    }
-
-    protected override void OnFormClosing(FormClosingEventArgs e)
-    {
-        if (planning != null)
-        {
-            // Keep the editor disabled until the worker has stopped; then close for real.
-            e.Cancel = true;
-            closeRequested = true;
-            planning.Cancel();
-            statusLabel.Text = "Cancelling…";
-            cancelButton.Enabled = false;
-        }
-        base.OnFormClosing(e);
-    }
-
-    private bool TryCheckCanChange(out string reason)
-    {
-        reason = null;
-        if (isOperationBusy?.Invoke() == true || plateView.IsFillInProgress)
-            reason = "Wait for the current nesting or plate action to finish, then replan.";
-        else if (plateView.IsDisposed || !ReferenceEquals(plateView.Plate, activePlate))
-            reason = "The active plate changed. Close this dialog and try again.";
-        return reason == null;
-    }
-
-    private void StartPlanning()
-    {
-        if (planning != null || IsDisposed)
-            return; // One planning run at a time; inputs are disabled while it runs.
-        ClearProposal();
-        if (!TryCheckCanChange(out var reason))
-        {
-            ShowMessage(reason);
-            return;
-        }
-
-        CuttingPlanBatch batch;
-        try
-        {
-            batch = CuttingPlanBatch.Capture(plates, parameters, keepOrderCheckBox.Checked, plateNumbers);
-        }
-        catch (Exception ex)
-        {
-            // Capture runs inside the dialog's message loop: report a failure, never crash the editor.
-            ShowMessage($"Unable to start planning: {ex.Message}");
-            return;
-        }
-
-        var source = new CancellationTokenSource();
-        var token = source.Token;
-        planning = source;
-        var run = ++generation;
-        SetPlanning(true);
-        summaryBox.Text = string.Empty;
-        statusLabel.Text = "Planning…";
-        var progress = new PostingProgress(uiContext, value =>
-        {
-            if (run == generation && ReferenceEquals(planning, source) && !IsDisposed)
-                statusLabel.Text = ProgressText(value);
-        });
-        var completion = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
-        PlanningTask = completion.Task;
-        var beforePlan = BeforePlan;
-        Task.Run(() =>
-        {
-            beforePlan?.Invoke(token);
-            return batch.Plan(progress, token);
-        }).ContinueWith(
-            work => uiContext.Post(_ => FinishPlanning(work, source, run, completion), null),
-            CancellationToken.None, TaskContinuationOptions.None, TaskScheduler.Default);
-    }
-
-    // Runs on the dialog's thread once the worker has stopped.
-    private void FinishPlanning(Task<CuttingPlanProposal> work, CancellationTokenSource source, int run,
-        TaskCompletionSource completion)
-    {
-        try
-        {
-            if (ReferenceEquals(planning, source))
-                planning = null;
-            source.Dispose();
-
-            if (run != generation || IsDisposed)
-                return;
-            SetPlanning(false);
-            if (closeRequested)
-            {
-                Close();
-                return;
-            }
-            if (work.IsFaulted)
-                ShowMessage($"Planning failed: {work.Exception.GetBaseException().Message}");
-            else if (work.IsCanceled)
-                ShowMessage("Planning was cancelled. Nothing has changed.");
-            else
-                ShowProposal(work.Result);
-        }
-        catch (Exception ex) when (!IsDisposed)
-        {
-            // A plan that cannot be presented must not leave a stale preview or an enabled Apply.
-            ShowMessage($"Unable to show the plan: {ex.Message}");
-        }
-        finally
-        {
-            completion.TrySetResult();
-        }
-    }
-
-    private void ShowProposal(CuttingPlanProposal result)
-    {
-        proposal = result;
-        summaryBox.Text = string.Join(Environment.NewLine, result.Describe(unit)
-            .Where(line => !line.TrimStart().StartsWith("- ", StringComparison.Ordinal)
-                && !line.TrimStart().StartsWith("... and ", StringComparison.Ordinal)));
-        var warningRows = result.DiagnosticRows();
-        populatingWarnings = true;
-        try
-        {
-            warningGrid.Rows.Clear();
-            foreach (var row in warningRows)
-            {
-                var display = warningGrid.Rows.Add(row.PlateNumber, row.PartNumber, row.OtherPartNumber,
-                    row.Message);
-                warningGrid.Rows[display].Tag = row;
-            }
-            warningGrid.ClearSelection();
-        }
-        finally
-        {
-            populatingWarnings = false;
-        }
-        acceptWarningsCheckBox.Checked = false;
-        acceptWarningsCheckBox.Visible = result.RequiresWarningAcceptance;
-        statusLabel.Text = result.CanApply ? "Review the plan, then apply it."
-            : result.RequiresWarningAcceptance ? "Unverified plan: review and accept the warnings to apply."
-            : "Nothing can be applied.";
-        applyButton.Enabled = result.CanApply;
-        var index = Array.IndexOf(plates, activePlate);
-        ShowPlate(index);
-    }
-
-    private void ShowPlate(int index)
-    {
-        preview.Visible = false;
-        if (proposal == null || index < 0 || index >= proposal.Plates.Count)
-            return;
-        var plate = proposal.BuildPreview(index);
-        if (plate == null)
-        {
-            previewLabel.Text = $"Plate {plateNumbers[index]}: no current, usable preview. "
-                + "Part numbers refer to the editor; no location can be certified here.";
-            return;
-        }
-        previewLabel.Text = proposal.Plates[index].IsReady
-            ? $"Plate {plateNumbers[index]} — preview, numbered in proposed cutting order:"
-            : $"UNVERIFIED — Plate {plateNumbers[index]} — preview, numbered in proposed cutting order:";
-        preview.Plate = plate;
-        preview.Visible = true;
-        preview.ZoomToFit();
-    }
-
-    private void WarningGrid_SelectionChanged(object sender, EventArgs e)
-    {
-        if (populatingWarnings || proposal == null || warningGrid.SelectedRows.Count == 0)
-            return;
-        // SelectionChanged precedes CurrentCell's update; SelectedRows is the new selection.
-        if (warningGrid.SelectedRows[0].Tag is not CuttingPlanDiagnosticRow row)
-            return;
-        ShowPlate(row.PlateIndex);
-        if (!preview.Visible || row.PartNumber is not int partNumber)
-        {
-            if (preview.Visible)
-                previewLabel.Text += " No part location was provided for this warning.";
-            return;
-        }
-        var plan = proposal.Plates[row.PlateIndex].Result;
-        var matched = plan.ProposedOrder.Select((part, position) => (part, position))
-            .FirstOrDefault(item => item.part.SourceOrdinal == partNumber - 1);
-        if (matched.part == null)
-        {
-            previewLabel.Text += " This source part has no proposed preview location.";
-            return;
-        }
-        var bounds = preview.Plate.Parts[matched.position].BoundingBox;
-        if (row.OtherPartNumber is int otherNumber)
-        {
-            var other = plan.ProposedOrder.Select((part, position) => (part, position))
-                .FirstOrDefault(item => item.part.SourceOrdinal == otherNumber - 1);
-            if (other.part != null)
-            {
-                var second = preview.Plate.Parts[other.position].BoundingBox;
-                var left = System.Math.Min(bounds.Left, second.Left);
-                var bottom = System.Math.Min(bounds.Bottom, second.Bottom);
-                bounds = new OpenNest.Geometry.Box(left, bottom,
-                    System.Math.Max(bounds.Right, second.Right) - left,
-                    System.Math.Max(bounds.Top, second.Top) - bottom);
-            }
-        }
-        if (double.IsFinite(bounds.X) && double.IsFinite(bounds.Y)
-            && double.IsFinite(bounds.Length) && double.IsFinite(bounds.Width)
-            && bounds.Length > 0 && bounds.Width > 0)
-        {
-            var pad = System.Math.Max(0.5, System.Math.Max(bounds.Length, bounds.Width) * 0.12);
-            preview.ZoomToArea(bounds.X - pad, bounds.Y - pad,
-                bounds.Length + 2 * pad, bounds.Width + 2 * pad);
-        }
-        previewLabel.Text += " Showing affected part extent, not an exact warning point.";
-    }
-
-    private void ClearProposal()
-    {
-        proposal = null;
-        populatingWarnings = true;
-        try
-        {
-            warningGrid.Rows.Clear();
-        }
-        finally
-        {
-            populatingWarnings = false;
-        }
-        acceptWarningsCheckBox.Checked = false;
-        acceptWarningsCheckBox.Visible = false;
-        applyButton.Enabled = false;
-        preview.Visible = false;
-        previewLabel.Text = previewText;
-    }
-
-    private void ShowMessage(string message)
-    {
-        ClearProposal();
-        statusLabel.Text = string.Empty;
-        summaryBox.Text = message;
-    }
-
-    private void SetPlanning(bool running)
-    {
-        settingsButton.Enabled = !running;
-        keepOrderCheckBox.Enabled = !running;
-        acceptWarningsCheckBox.Enabled = !running;
-        planButton.Enabled = !running;
-        if (running)
-            applyButton.Enabled = false;
-    }
-
-    private static string ProgressText(CuttingPlanProgress progress)
-    {
-        var plate = progress.PlateCount == 1
-            ? $"plate {progress.PlateNumber}"
-            : $"plate {progress.PlateNumber} ({progress.PlateIndex + 1} of {progress.PlateCount})";
-        return progress.Phase switch
-        {
-            CuttingPlanPhase.CheckingOverlap => $"Checking {plate} for overlapping parts…",
-            CuttingPlanPhase.Reordering => $"Planning {plate}: searching for a part order…",
-            _ => $"Planning {plate} with the current part order…",
-        };
-    }
-
-    private void ShowSettings()
-    {
-        var tabs = parameters.TabsEnabled ? "on" : "off";
-        settingsLabel.Text = $"Lead-ins: outside {Describe(parameters.ExternalLeadIn)}, holes "
-            + $"{Describe(parameters.InternalLeadIn)}, arcs and circles {Describe(parameters.ArcCircleLeadIn)}. "
-            + $"Tabs {tabs}.";
-    }
-
-    private static string Describe(LeadIn leadIn)
-    {
-        if (leadIn == null || leadIn is NoLeadIn)
-            return "none";
-        var name = leadIn.GetType().Name;
-        if (name.EndsWith("LeadIn", StringComparison.Ordinal))
-            name = name[..^"LeadIn".Length];
-        return Regex.Replace(name, "(?<=[a-z])(?=[A-Z])", " ").ToLowerInvariant();
-    }
-
-    private void SettingsButton_Click(object sender, EventArgs e)
-    {
-        using var dialog = new CuttingParametersDialog();
-        dialog.LoadParameters(parameters);
-        if (dialog.ShowDialog(this) != DialogResult.OK)
-            return;
-        parameters = dialog.GetParameters();
-        ShowSettings();
-        StartPlanning();
-    }
-
-    private void KeepOrderCheckBox_CheckedChanged(object sender, EventArgs e) => StartPlanning();
-
-    private void PlanButton_Click(object sender, EventArgs e) => StartPlanning();
-
-    private sealed class PostingProgress(SynchronizationContext context, Action<CuttingPlanProgress> handler)
-        : IProgress<CuttingPlanProgress>
-    {
-        public void Report(CuttingPlanProgress value) => context.Post(_ => handler(value), null);
-    }
-
-    private bool CanApplyProposal => proposal?.CanApply == true
-        || proposal?.CanApplyWithWarnings == true && acceptWarningsCheckBox.Checked;
-
-    private void AcceptWarningsCheckBox_CheckedChanged(object sender, EventArgs e) =>
-        applyButton.Enabled = planning == null && CanApplyProposal;
-
-    private void ApplyButton_Click(object sender, EventArgs e)
-    {
-        if (planning != null || !CanApplyProposal)
-            return;
-        if (!TryCheckCanChange(out var reason))
-        {
-            ShowMessage(reason);
-            return;
-        }
-
-        var commit = proposal.Apply(acceptWarningsCheckBox.Checked);
-        CommitResult = commit;
-        switch (commit.Status)
-        {
-            case CuttingCommitStatus.Applied:
-                DialogResult = DialogResult.OK;
-                Close();
-                return;
-            case CuttingCommitStatus.Stale:
-                ShowMessage("The nest changed after planning, so nothing was applied. Replan to continue.");
-                return;
-            default:
-                ShowMessage($"Nothing was applied: {commit.Message ?? commit.Status.ToString()}");
-                return;
-        }
-    }
-}
diff --git a/OpenNest/Forms/EditNestForm.cs b/OpenNest/Forms/EditNestForm.cs
index f4ad2bf..635f151 100644
--- a/OpenNest/Forms/EditNestForm.cs
+++ b/OpenNest/Forms/EditNestForm.cs
@@ -1009,31 +1009,6 @@ namespace OpenNest.Forms
             CalculateCurrentPlateCutTime();
         }
 
-        /// <summary>
-        /// Opens the cutting planner for the active plate or every plate. The planner applies its
-        /// plan itself, all or nothing; on success the confirmed settings become the saved defaults.
-        /// </summary>
-        public bool PlanCutting(bool allPlates, Func<bool> isOperationBusy, IWin32Window owner)
-        {
-            if (CuttingInspection != null || PlateView?.Plate == null || Nest == null)
-                return false;
-
-            // The form plans with its own copy; the plate's live settings stay plate state.
-            var parameters = LoadOrDefaultParameters(PlateView.Plate.CuttingParameters);
-            using var form = new CuttingPlanForm(PlateView, Nest, allPlates, parameters, isOperationBusy);
-            if (form.ShowDialog(owner) != DialogResult.OK)
-                return false;
-
-            SaveCuttingParameters(form.ConfirmedParameters);
-            UpdatePlateList();
-            if (form.CommitResult?.RefreshErrors.Count > 0)
-                MessageBox.Show(owner,
-                    "The cutting plan was applied, but part of the display did not refresh: "
-                        + form.CommitResult.RefreshErrors[0].Message,
-                    "Plan Cutting", MessageBoxButtons.OK, MessageBoxIcon.Warning);
-            return true;
-        }
-
         public void AssignLeadIns_Click(object sender, EventArgs e)
         {
             if (PlateView?.Plate == null)
diff --git a/OpenNest/Forms/MainForm.cs b/OpenNest/Forms/MainForm.cs
index eae511d..7c59ae5 100644
--- a/OpenNest/Forms/MainForm.cs
+++ b/OpenNest/Forms/MainForm.cs
@@ -9,6 +9,7 @@ using System.Threading.Tasks;
 using System.Windows.Forms;
 using OpenNest.Actions;
 using OpenNest.Collections;
+using OpenNest.Controls;
 using OpenNest.Data;
 using OpenNest.Diagnostics;
 using OpenNest.Engine;
@@ -1925,6 +1926,21 @@ namespace OpenNest.Forms
 
         private void NestPlanCutting_Click(object sender, EventArgs e) => ShowCuttingPlan(allPlates: true);
 
+        internal bool IsCuttingPlanBusy(PlateView[] views) => nestingInProgress
+            || Application.OpenForms.OfType<NestProgressForm>().Any()
+            || views.Any(v => v.IsFillInProgress || v.Actions.CurrentAction?.IsBusy() == true);
+
+        // Native tests capture this notice without opening a modal dialog in session zero.
+        internal System.Action<string, string> CuttingPlanNotice { get; set; }
+
+        private void ShowCuttingPlanNotice(string message, string caption)
+        {
+            if (CuttingPlanNotice != null)
+                CuttingPlanNotice(message, caption);
+            else
+                MessageBox.Show(this, message, caption, MessageBoxButtons.OK, MessageBoxIcon.Information);
+        }
+
         private void ShowCuttingPlan(bool allPlates)
         {
             if (MdiChildren.OfType<EditNestForm>().Any(form => form.CuttingInspection != null && !ReferenceEquals(form, activeForm)))
@@ -1938,12 +1954,9 @@ namespace OpenNest.Forms
                 .Where(form => ReferenceEquals(form.Nest, nest))
                 .Select(form => form.PlateView).ToArray();
             // A closed progress window can still have a fill awaiting completion/commit.
-            bool IsBusy() => nestingInProgress || Application.OpenForms.OfType<NestProgressForm>().Any()
-                || views.Any(v => v.IsFillInProgress || v.Actions.CurrentAction?.IsBusy() == true);
-            if (IsBusy())
+            if (IsCuttingPlanBusy(views))
             {
-                MessageBox.Show(this, "Finish or cancel the current nesting or plate action first.",
-                    "Plan Cutting", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                ShowCuttingPlanNotice("Finish or cancel the current nesting or plate action first.", "Plan Cutting");
                 return;
             }
 
diff --git a/OpenNest/Forms/ValidateNestForm.cs b/OpenNest/Forms/ValidateNestForm.cs
deleted file mode 100644
index ac4d65e..0000000
--- a/OpenNest/Forms/ValidateNestForm.cs
+++ /dev/null
@@ -1,326 +0,0 @@
-using System;
-using System.Drawing;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-using OpenNest.Diagnostics;
-
-namespace OpenNest.Forms;
-
-/// <summary>Modeless inspection; the editor scope blocks edits while leaving canvas navigation available.</summary>
-public sealed class ValidateNestForm : Form
-{
-    private readonly Nest nest;
-    private readonly ValidationInspectionScope inspection;
-    private readonly Func<Nest, CancellationToken, Task<PostVerificationReport>> analyze;
-    private readonly CancellationTokenSource cancellation = new();
-    private readonly Label summaryLabel;
-    private readonly TextBox reportBox;
-    private readonly DataGridView warningGrid;
-    private readonly EditNestForm editor;
-    private readonly int originalPlate;
-    private bool populating;
-    private bool editorRestored;
-    private readonly (float Scale, PointF Origin) originalViewport;
-    private readonly OverlapDisplayMode originalOverlapDisplay;
-    private readonly Button closeButton;
-    private bool started;
-    private bool analyzing;
-    private bool closeRequested;
-    private bool disposedResources;
-
-    public ValidateNestForm(Nest nest)
-        : this(nest, (value, token) => Task.Run(() => PostVerificationAnalyzer.Analyze(value, token), token))
-    { }
-
-    public ValidateNestForm(EditNestForm editor)
-        : this(editor, (value, token) => Task.Run(() => PostVerificationAnalyzer.Analyze(value, token), token))
-    { }
-
-    internal ValidateNestForm(EditNestForm editor, Func<Nest, CancellationToken, Task<PostVerificationReport>> analyze)
-        : this(editor.Nest, analyze)
-    {
-        this.editor = editor;
-        inspection = new ValidationInspectionScope(editor, this);
-        originalPlate = editor.PlateManager.CurrentIndex;
-        originalViewport = editor.PlateView.CaptureViewport();
-        originalOverlapDisplay = editor.PlateView.OverlapDisplay;
-        editor.PlateView.OverlapDisplay = OverlapDisplayMode.Off;
-        StartPosition = FormStartPosition.Manual;
-        MinimumSize = new Size(480, 440);
-        ClientSize = new Size(560, 650);
-    }
-
-    internal ValidateNestForm(Nest nest, Func<Nest, CancellationToken, Task<PostVerificationReport>> analyze)
-    {
-        this.nest = nest ?? throw new ArgumentNullException(nameof(nest));
-        this.analyze = analyze ?? throw new ArgumentNullException(nameof(analyze));
-        Text = "Validate Nest";
-        Name = nameof(ValidateNestForm);
-        StartPosition = FormStartPosition.CenterParent;
-        ClientSize = new Size(850, 560);
-        MinimumSize = new Size(700, 440);
-        ShowInTaskbar = true;
-        MinimizeBox = true;
-        AutoScaleMode = AutoScaleMode.Font;
-
-        var layout = new TableLayoutPanel
-        {
-            Dock = DockStyle.Fill,
-            Padding = new Padding(12),
-            ColumnCount = 1,
-            RowCount = 4,
-        };
-        layout.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        layout.RowStyles.Add(new RowStyle(SizeType.Percent, 100));
-        layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
-        summaryLabel = new Label
-        {
-            Name = "summaryLabel",
-            AutoSize = true,
-            Dock = DockStyle.Fill,
-            Text = "Checking all plates: overlaps, missing lead-ins, and rapid crossings...",
-            Margin = new Padding(3, 3, 3, 10),
-        };
-        var scopeLabel = new Label
-        {
-            AutoSize = true,
-            Dock = DockStyle.Fill,
-            Text = "Select an issue to locate it in the main plate view. Its highlight pulses; unrelated parts appear gray.\r\n"
-                + "Minimum spacing, plate boundaries, and final post-processor output are not checked.",
-            Margin = new Padding(3, 3, 3, 10),
-        };
-        reportBox = new TextBox
-        {
-            Name = "reportBox",
-            Dock = DockStyle.Fill,
-            Multiline = true,
-            ReadOnly = true,
-            ScrollBars = ScrollBars.Vertical,
-            WordWrap = true,
-            MaxLength = 0,
-            AccessibleName = "Nest validation findings",
-            Text = "Validation is running...",
-        };
-        warningGrid = new DataGridView
-        {
-            Name = "warningGrid",
-            Dock = DockStyle.Fill,
-            ReadOnly = true,
-            AllowUserToAddRows = false,
-            AllowUserToDeleteRows = false,
-            MultiSelect = false,
-            SelectionMode = DataGridViewSelectionMode.FullRowSelect,
-            AutoGenerateColumns = false,
-            RowHeadersVisible = false,
-            BackgroundColor = SystemColors.Window,
-            AccessibleName = "Nest validation findings",
-        };
-        foreach (var title in new[] { "Plate", "Part", "With", "Issue", "Finding" })
-            warningGrid.Columns.Add(new DataGridViewTextBoxColumn
-            {
-                HeaderText = title,
-                Width = title == "Issue" ? 115 : 48,
-                AutoSizeMode = title == "Finding" ? DataGridViewAutoSizeColumnMode.Fill : DataGridViewAutoSizeColumnMode.None,
-                SortMode = DataGridViewColumnSortMode.NotSortable,
-            });
-        warningGrid.CurrentCellChanged += (_, _) => ShowSelectedFinding();
-        warningGrid.CellClick += (_, _) => ShowSelectedFinding();
-        var findings = new TableLayoutPanel { Dock = DockStyle.Fill, RowCount = 2, ColumnCount = 1 };
-        findings.RowStyles.Add(new RowStyle(SizeType.Percent, 65));
-        findings.RowStyles.Add(new RowStyle(SizeType.Percent, 35));
-        findings.Controls.Add(warningGrid, 0, 0);
-        findings.Controls.Add(reportBox, 0, 1);
-        closeButton = new Button
-        {
-            Name = "closeButton",
-            Text = "Cancel",
-            AutoSize = true,
-            DialogResult = DialogResult.Cancel,
-        };
-        closeButton.Click += (_, _) => Close();
-        var buttons = new FlowLayoutPanel
-        {
-            Dock = DockStyle.Fill,
-            AutoSize = true,
-            FlowDirection = FlowDirection.RightToLeft,
-        };
-        buttons.Controls.Add(closeButton);
-        layout.Controls.Add(summaryLabel, 0, 0);
-        layout.Controls.Add(scopeLabel, 0, 1);
-        layout.Controls.Add(findings, 0, 2);
-        layout.Controls.Add(buttons, 0, 3);
-        Controls.Add(layout);
-        AcceptButton = closeButton;
-        CancelButton = closeButton;
-    }
-
-    protected override void OnLoad(EventArgs e)
-    {
-        base.OnLoad(e);
-        if (editor == null)
-            return;
-        var area = Screen.FromControl(editor).WorkingArea;
-        Bounds = new Rectangle(area.Right - Width, area.Top, Width, System.Math.Min(Height, area.Height));
-    }
-
-    private void ShowSelectedFinding()
-    {
-        if (editorRestored || populating || editor == null || editor.IsDisposed)
-            return;
-        var view = editor.PlateView;
-        view.ClearValidationFinding();
-        if (warningGrid.CurrentRow?.Tag is not PostVerificationFinding finding
-            || finding.PlateNumber < 1 || finding.PlateNumber > nest.Plates.Count)
-            return;
-        if (editor.PlateManager.CurrentIndex != finding.PlateNumber - 1)
-            editor.PlateManager.LoadAt(finding.PlateNumber - 1);
-        var location = finding.Location;
-        if (location == null && finding.PartNumber is { } part && part > 0 && part <= view.Plate.Parts.Count)
-            location = view.Plate.Parts[part - 1]?.BoundingBox?.Center;
-        if (location is { } point && double.IsFinite(point.X) && double.IsFinite(point.Y))
-        {
-            var extent = finding.Overlap?.Bounds;
-            var size = System.Math.Max(10, System.Math.Max(extent?.Length ?? 0, extent?.Width ?? 0) * 2);
-            if (finding.RapidStart is { } start && finding.RapidEnd is { } end)
-                size = System.Math.Max(size, start.DistanceTo(end) * 1.5);
-            view.ZoomToArea(point.X - size / 2, point.Y - size / 2, size, size);
-            // Keep the marker in the portion of the main canvas left of this floating inspector.
-            var screen = view.RectangleToScreen(view.ClientRectangle);
-            var available = System.Math.Clamp(Left - screen.Left, 0, view.Width);
-            if (available > 100)
-                view.CenterValidationPoint(point, new Point(available / 2, view.Height / 2));
-        }
-        else
-            view.ZoomToFit();
-        view.ShowValidationFinding(finding with { Location = location });
-        ShowFindingDetails(finding);
-    }
-
-    private void ShowFindingDetails(PostVerificationFinding finding)
-    {
-        var hint = finding.Kind switch
-        {
-            PostVerificationKind.Overlap => "Shaded material is the overlap. The ring marks its area centroid, which can lie between separate patches.",
-            PostVerificationKind.RapidCrossing => finding.ContactPoints.Count > 0
-                ? "Crosshairs mark contacts with the completed contour. For travel along an edge, they mark the contact span's endpoints. The pulsing dashed orange line shows the rapid."
-                : "The pulsing dashed orange line shows the rapid inside the completed contour; there is no boundary contact point to mark.",
-            PostVerificationKind.MissingLeadIn => "The ring marks the cutting contour start where a lead-in is missing.",
-            _ => "The ring marks the affected part's center when available; no exact problem location is known.",
-        };
-        reportBox.Text = $"Plate {finding.PlateNumber}, part {finding.PartNumber}: {finding.Message}"
-            + Environment.NewLine + Environment.NewLine + hint;
-    }
-
-    protected override void OnFormClosed(FormClosedEventArgs e)
-    {
-        RestoreEditor();
-        base.OnFormClosed(e);
-    }
-
-    private void RestoreEditor()
-    {
-        if (editorRestored || editor == null || editor.IsDisposed)
-            return;
-        editorRestored = true;
-        inspection?.Dispose();
-        editor.PlateView.ClearValidationFinding();
-        if (editor.PlateManager.CurrentIndex != originalPlate)
-            editor.PlateManager.LoadAt(originalPlate);
-        editor.PlateView.RestoreViewport(originalViewport);
-        editor.PlateView.OverlapDisplay = originalOverlapDisplay;
-    }
-
-    protected override async void OnShown(EventArgs e)
-    {
-        base.OnShown(e);
-        await ValidateAsync();
-    }
-
-    internal async Task ValidateAsync()
-    {
-        if (started)
-            return;
-        started = true;
-        analyzing = true;
-        try
-        {
-            var report = await analyze(nest, cancellation.Token);
-            if (closeRequested || IsDisposed)
-                return;
-            populating = true;
-            foreach (var finding in report.Findings)
-            {
-                var index = warningGrid.Rows.Add(finding.PlateNumber, finding.PartNumber, finding.OtherPartNumber,
-                    finding.Kind, finding.Message);
-                warningGrid.Rows[index].Tag = finding;
-            }
-            populating = false;
-            ShowSelectedFinding();
-            reportBox.Text = report.ToDisplayText("Nest validation");
-            if (editor != null && warningGrid.CurrentRow?.Tag is PostVerificationFinding selected)
-                ShowFindingDetails(selected);
-            reportBox.SelectionStart = 0;
-            reportBox.SelectionLength = 0;
-            summaryLabel.Text = report.Findings.Any(finding => finding.Kind == PostVerificationKind.Incomplete)
-                ? "Validation incomplete. Review the findings; this nest has not passed all checks."
-                : report.HasWarnings ? "Warnings found. Review the findings below."
-                : "Validation complete. No warnings found by these checks.";
-        }
-        catch (OperationCanceledException) when (cancellation.IsCancellationRequested)
-        {
-            closeRequested = true;
-        }
-        catch (Exception ex)
-        {
-            if (!IsDisposed)
-            {
-                summaryLabel.Text = "Validation failed. This nest has not passed the checks.";
-                reportBox.Text = "Validation could not finish. Close this window and try again."
-                    + Environment.NewLine + Environment.NewLine + ex.Message;
-            }
-        }
-        finally
-        {
-            analyzing = false;
-            if (!IsDisposed)
-            {
-                closeButton.Text = "Close";
-                if (closeRequested)
-                {
-                    DialogResult = DialogResult.Cancel;
-                    Close();
-                }
-            }
-        }
-    }
-
-    protected override void OnFormClosing(FormClosingEventArgs e)
-    {
-        if (analyzing)
-        {
-            closeRequested = true;
-            cancellation.Cancel();
-            closeButton.Enabled = false;
-            summaryLabel.Text = "Canceling validation...";
-            e.Cancel = true;
-        }
-        base.OnFormClosing(e);
-    }
-
-    protected override void Dispose(bool disposing)
-    {
-        if (disposing && !disposedResources)
-        {
-            disposedResources = true;
-            RestoreEditor();
-            inspection?.Dispose();
-            cancellation.Cancel();
-            cancellation.Dispose();
-        }
-        base.Dispose(disposing);
-    }
-}
diff --git a/OpenNest/Forms/ValidationInspectionScope.cs b/OpenNest/Forms/ValidationInspectionScope.cs
index 32865ee..bf29b31 100644
--- a/OpenNest/Forms/ValidationInspectionScope.cs
+++ b/OpenNest/Forms/ValidationInspectionScope.cs
@@ -19,11 +19,6 @@ internal sealed class ValidationInspectionScope : IDisposable
     private Form closingHost;
     private readonly bool previousInspection;
 
-    public ValidationInspectionScope(EditNestForm editor, Form inspector)
-        : this(editor, inspector, null, inspector.Close)
-    {
-    }
-
     public ValidationInspectionScope(EditNestForm editor, Control inspector, Control header, Action close)
     {
         view = editor.PlateView;
diff --git a/docs/cutting-planner.md b/docs/cutting-planner.md
index ff46770..72326b1 100644
--- a/docs/cutting-planner.md
+++ b/docs/cutting-planner.md
@@ -361,6 +361,8 @@ unlocking inspection. Planning is not live-nest validation or posting consent. T
 panel's **Validate Nest (live programs)** mode separately checks current installed
 programs across all plates and navigates typed findings on the live canvas; it
 never certifies an unapplied proposal. Posting still initiates its own fresh review.
+The former standalone planning dialog is retired; only the docked Plan/Validate
+panel is wired in the editor. Non-editor callers still use the shared analyzer.
 
 - The panel starts from the plate's cutting settings (or the last-used settings) and plans
   at once. `Cutting Settings...` edits them and `Keep the current part order` fixes the
diff --git a/docs/post-verification.md b/docs/post-verification.md
index 8420955..9d3f4cc 100644
--- a/docs/post-verification.md
+++ b/docs/post-verification.md
@@ -42,7 +42,9 @@ cancellation and waits for the worker to stop before restoring editing controls.
 Switching to Plan mode also waits for any validation worker; it does not promote
 a live validation report into a plan check. Closing the editor or main window
 joins the worker before continuing the close. Posting while inspection is open
-is refused; close the panel and use the fresh posting review.
+is refused; close the panel and use the fresh posting review. The former floating
+validator window is retired; non-editor checks remain available through the
+shared `PostVerificationAnalyzer` without an editor UI dependency.
 
 ## Posting workflow
 
diff --git a/docs/windows-acceptance.md b/docs/windows-acceptance.md
index a6016d3..66c3a79 100644
--- a/docs/windows-acceptance.md
+++ b/docs/windows-acceptance.md
@@ -36,7 +36,7 @@ removing or renaming required coverage requires an intentional manifest change.
 The whole suites still run, not just this manifest's subset.
 
 The areas are BOM import, Nest Info material preservation, saved-nest browsing,
-nesting/commit policy, PDF export, the cutting dialog, automatic cutoffs,
+nesting/commit policy, PDF export, docked cutting planning and validation, automatic cutoffs,
 overlap/posting consent, UI lifetime, import/export failures, and MCP processes.
 The manifest is public test coverage only. Private tracker IDs, plans, customer
 data, and acceptance notes stay out of the repository and CI artifacts.
diff --git a/scripts/windows-acceptance.json b/scripts/windows-acceptance.json
index ccd8ca3..36d43a9 100644
--- a/scripts/windows-acceptance.json
+++ b/scripts/windows-acceptance.json
@@ -353,7 +353,7 @@
     },
     {
       "id": "cutting-planner",
-      "title": "Current/all-plate cutting dialog",
+      "title": "Docked cutting planning and live validation",
       "required_tests": [
         {
           "project": "OpenNest.WinForms.Tests",
@@ -372,42 +372,58 @@
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.AllPlates_SkipsEmptyPlatesAndRefusesTheBatchWhenOnePlateIsBlocked",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.AllPlatesNavigatesReadyAndBlockedWithoutPartialApply",
           "minimum_cases": 1
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.ApplyAfterALiveEdit_ChangesNothingAndReplanRecovers",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.StaleApplyClearsPreviewAndAcceptanceWithoutChangingPrograms",
           "minimum_cases": 1
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.BlockedPlate_KeepsApplyDisabledAndShowsTheCurrentParts",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.WarningAcceptanceResetsOnReplanAndSettingsOrderChange",
           "minimum_cases": 1
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.BusyEditor_DoesNotStartPlanningUntilItIsFree",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.CloseDuringWorkerRetainsPanelAndInspectionLockUntilCompletion",
           "minimum_cases": 1
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.ClosingWhilePlanning_CancelsAndWaitsForTheWorker",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.ConstructorKeepsItsOwnCopyOfSettings",
           "minimum_cases": 1
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.Constructor_PlansWithItsOwnCopyOfTheSettings",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.BusyMenuRefusesPlanningAndFreeMenuOpensDockedPanel",
           "minimum_cases": 1
         },
         {
           "project": "OpenNest.WinForms.Tests",
-          "method": "OpenNest.WinForms.Tests.Forms.CuttingPlanFormTests.PlanThenApply_InstallsThePlanAndRedrawsTheEditorInPlateOrder",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingInspectionPanelTests.ReadyApplyInstallsExactPreviewAndRefreshesLiveView",
+          "minimum_cases": 1
+        },
+        {
+          "project": "OpenNest.WinForms.Tests",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingValidationPanelTests.ValidateMenuUsesSharedPanelAndRealAllPlateFindingsRestoreOriginalView",
+          "minimum_cases": 1
+        },
+        {
+          "project": "OpenNest.WinForms.Tests",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingValidationPanelTests.ExternalCloseJoinsValidationBeforeReleasingMdiGuard",
+          "minimum_cases": 3
+        },
+        {
+          "project": "OpenNest.WinForms.Tests",
+          "method": "OpenNest.WinForms.Tests.Forms.CuttingValidationPanelTests.ModeSwitchJoinsBothWorkersAndDiscardsOldResultsWithoutUnlocking",
           "minimum_cases": 1
         }
       ],
       "remaining_acceptance": [
-        "Selected-part side-panel migration and legacy automatic-path retirement are separate unfinished work.",
+        "Native operator check of docked panel readability, multi-plate navigation, Escape/X/Cancel, and final post review; automated form tests are not visual acceptance.",
+        "Selected-part Auto Assign migration and legacy automatic-algorithm retirement are separate work.",
         "Actual job and NC/controller safety are not certified."
       ]
     },