merge: integrate refactor/menubar-reorg

Brings in the Plate menu reorganization, Database-mode drag-and-drop
open, the SavedNestsForm look fixes and the Irregular block-fill work
budget fix.

Conflicts:
- MainForm.Designer.cs: keep the branch's Plate menu order (Arrange
  submenu, View in CAD last) and add master's Plan Cutting item ahead
  of the lead-in commands.
- SavedNestsForm.cs: keep master's browser rewrite (details, preview,
  columns) and apply the branch's intent to it: open maximized with
  MaximizedBounds clear of the taskbar, the lighter grid palette on all
  three grids, and B/KB/MB/GB file sizes.

OpenNest.Engine/NestingEngines/Irregular/BlockCatalog.cs

@@ -17,6 +17,8 @@ namespace OpenNest.Engine.NestingEngines.Irregular;
 internal sealed class BlockCatalog : IDisposable
 {
     private readonly double spacing;
+    private readonly WorkCounter counter;
+    private readonly long budget;
     private readonly Dictionary<int, Drawing> drawings = new();
     private readonly Dictionary<int, List<Orientation>> orientations = new();
     private readonly Dictionary<int, int> attempts = new();
@@ -24,9 +26,11 @@ internal sealed class BlockCatalog : IDisposable
     private readonly Dictionary<(int Type, int Quantity, double Length, double Width), IReadOnlyList<Placed>> cache = new();
 
     public BlockCatalog(double spacing, IReadOnlyList<PartType> types,
-        IReadOnlyDictionary<int, IReadOnlyList<PairPose>> pairs)
+        IReadOnlyDictionary<int, IReadOnlyList<PairPose>> pairs, WorkCounter counter, long budget)
     {
         this.spacing = spacing;
+        this.counter = counter;
+        this.budget = budget;
         foreach (var type in types)
         {
             var poses = type.Orientations.ToList();
@@ -65,7 +69,7 @@ internal sealed class BlockCatalog : IDisposable
         var key = (type.Index, quantity, rectangle.Length, rectangle.Width);
         if (cache.TryGetValue(key, out var cached))
             return cached;
-        if (rectangle.Area() < 3 * type.Area || attempts.GetValueOrDefault(type.Index) >= 8)
+        if (rectangle.Area() < 3 * type.Area || attempts.GetValueOrDefault(type.Index) >= 8 || counter.Value >= budget)
             return Array.Empty<Placed>();
         attempts[type.Index] = attempts.GetValueOrDefault(type.Index) + 1;
         var result = Build(type, quantity, rectangle, token);
@@ -75,6 +79,11 @@ internal sealed class BlockCatalog : IDisposable
 
     private IReadOnlyList<Placed> Build(PartType type, int quantity, Box rectangle, CancellationToken token)
     {
+        // PrivatePlateFill.Run below is a full independent NFP-based pack whose own operations
+        // never touch this solve's effort meter; charge it here using the same factors - demand
+        // and outline complexity - that drive its real cost, so the shared budget actually sees it.
+        var vertices = type.Orientations.Count > 0 ? type.Orientations[0].Outline.Count : 1;
+        counter.Add((long)quantity * quantity * System.Math.Max(1, vertices));
         if (!drawings.TryGetValue(type.Index, out var drawing))
             drawings[type.Index] = drawing = DrawingJobMapper.CreateDrawing(type.Part);
         try

OpenNest.Engine/NestingEngines/Irregular/IrregularNestingEngine.cs

@@ -48,7 +48,7 @@ public sealed class IrregularNestingEngine : INestingEngine
         ArgumentNullException.ThrowIfNull(job);
         token.ThrowIfCancellationRequested();
         var types = PartCatalog.Build(job);
-        using var solver = new Solver(job, types, progress, token);
+        using var solver = new Solver(job, types, progress, token, WorkBudget);
 
         // Pair-only orientations may fit stock even when the sampled single poses do not.
         // Demand that neither a single nor a pair can fit is reported unplaced.
@@ -86,7 +86,8 @@ public sealed class IrregularNestingEngine : INestingEngine
         NestJob job,
         IReadOnlyList<PartType> types,
         IProgress<NestJobProgress>? progress,
-        CancellationToken token
+        CancellationToken token,
+        long workBudget
     ) : IDisposable
     {
         public void Dispose()
@@ -104,7 +105,7 @@ public sealed class IrregularNestingEngine : INestingEngine
         {
             var spacing = System.Math.Max(0, stock.PartSpacing);
             if (!blocks.TryGetValue(spacing, out var found))
-                blocks[spacing] = found = new BlockCatalog(spacing, types, PairsFor(stock));
+                blocks[spacing] = found = new BlockCatalog(spacing, types, PairsFor(stock), Work, workBudget);
             return found;
         }