Add an isolated native WPF node editor and demo

NativeWpf/README.md

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+# Native WPF implementation
+
+This directory is self-contained. It adds a native WPF implementation without changing the repository's existing WinForms library, WinForms demo, legacy WPF host demo, or original solution.
+
+## Projects
+
+- `ST.Library.UI.WPF`: dependency-free native WPF controls rendered through the original `System.Drawing.Graphics` contract and presented by a DPI-aware WPF `WriteableBitmap`.
+- `WpfNodeEditorDemo`: full-window node canvas with context menus, automatic layout, save/open actions, an execution command, and a node-anchored reflection property panel provided by the `ColorVision.UI` 1.5.7 NuGet package.
+- `STNodeEditor.Wpf.sln`: standalone solution for the two projects above.
+
+The control library has no NuGet dependency and does not reference `System.Windows.Forms`, `WindowsFormsIntegration`, or a third-party rendering package. The demo uses a native WPF visual tree with no `WindowsFormsHost`; only the demo references `ColorVision.UI` for its reflection-based property editors and theme resources.
+
+Node creation is available from the integrated `+` button and the canvas context menu, so the demo does not reserve space for a node tree. Selecting one node opens its reflected `STNodePropertyAttribute` properties beside the node while leaving the rest of the window available to the canvas.
+
+The demo uses direct cursor-centered wheel zoom in `0.05` steps across the editor's full `0.2` to `5.0` scale range. The canvas lock button controls blank-area left-drag explicitly: unlocked pans the canvas, locked draws a selection rectangle, and middle-button drag always pans. Manual lock state is not changed by clicking a node.
+
+The demo keeps the historical `WpfNodeEdittorDemo` assembly name so existing STND files retain the same node module identity; only the project folder and UI namespace use the corrected spelling.
+
+## Run
+
+Open `STNodeEditor.Wpf.sln`, select `WpfNodeEditorDemo`, and press F5. From PowerShell, the equivalent commands are:
+
+```powershell
+dotnet build .\STNodeEditor.Wpf.sln
+dotnet run --project .\WpfNodeEditorDemo\WpfNodeEditorDemo.csproj
+```
+
+The WPF library targets both `net8.0-windows` and `net10.0-windows`; the demo targets `net8.0-windows` and runs as x64 because the published `ColorVision.UI` assemblies are AMD64. This does not alter the target framework or source of any existing project.

NativeWpf/ST.Library.UI.WPF/Lang.cs

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+using System;
+using System.Collections.Generic;
+using System.Resources;
+
+namespace ST.Library.UI;
+
+public static class Lang
+{
+	private static readonly List<ResourceManager> _externalManagers = new();
+
+	public static void RegisterResourceManager(ResourceManager manager)
+	{
+		if (manager != null && !_externalManagers.Contains(manager))
+		{
+			_externalManagers.Add(manager);
+		}
+	}
+
+	public static string Get(string key)
+	{
+		return GetOrDefault(key);
+	}
+
+	public static string GetOrDefault(string key)
+	{
+		for (int i = _externalManagers.Count - 1; i >= 0; i--)
+		{
+			try
+			{
+				string value = _externalManagers[i].GetString(key);
+				if (value != null) return value;
+			}
+			catch { }
+		}
+
+		return key;
+	}
+
+}

NativeWpf/ST.Library.UI.WPF/NodeEditor/AlertLocation.cs

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+namespace ST.Library.UI.NodeEditor;
+
+public enum AlertLocation
+{
+	Left,
+	Top,
+	Right,
+	Bottom,
+	Center,
+	LeftTop,
+	RightTop,
+	RightBottom,
+	LeftBottom
+}

NativeWpf/ST.Library.UI.WPF/NodeEditor/CanvasMoveArgs.cs

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+namespace ST.Library.UI.NodeEditor;
+
+public enum CanvasMoveArgs
+{
+	Left = 1,
+	Top = 2,
+	All = 4
+}

NativeWpf/ST.Library.UI.WPF/NodeEditor/ConnectionInfo.cs

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+namespace ST.Library.UI.NodeEditor;
+
+public struct ConnectionInfo
+{
+	public STNodeOption Input;
+
+	public STNodeOption Output;
+}

NativeWpf/ST.Library.UI.WPF/NodeEditor/ConnectionStatus.cs

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+using System.ComponentModel;
+
+namespace ST.Library.UI.NodeEditor;
+
+public enum ConnectionStatus
+{
+	[Description("不存在所有者")]
+	NoOwner,
+	[Description("相同的所有者")]
+	SameOwner,
+	[Description("均为输入或者输出选项")]
+	SameInputOrOutput,
+	[Description("不同的数据类型")]
+	ErrorType,
+	[Description("单连接节点")]
+	SingleOption,
+	[Description("出现环形路径")]
+	Loop,
+	[Description("已存在的连接")]
+	Exists,
+	[Description("空白选项")]
+	EmptyOption,
+	[Description("已经连接")]
+	Connected,
+	[Description("连接被断开")]
+	DisConnected,
+	[Description("节点被锁定")]
+	Locked,
+	[Description("操作被拒绝")]
+	Reject,
+	[Description("正在被连接")]
+	Connecting,
+	[Description("正在断开连接")]
+	DisConnecting
+}

NativeWpf/ST.Library.UI.WPF/NodeEditor/DrawingTools.cs

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+using System.Drawing;
+
+namespace ST.Library.UI.NodeEditor;
+
+public struct DrawingTools
+{
+	public Graphics Graphics;
+
+	public Pen Pen;
+
+	public SolidBrush SolidBrush;
+}

NativeWpf/ST.Library.UI.WPF/NodeEditor/NodeFindInfo.cs

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+namespace ST.Library.UI.NodeEditor;
+
+public struct NodeFindInfo
+{
+	public STNode Node;
+
+	public STNodeOption NodeOption;
+
+	public string Mark;
+
+	public string[] MarkLines;
+}