add:浮动栏自定义

Ink Canvas/Controls/Toolbar/ToolbarItemConfig.cs

@@ -0,0 +1,33 @@
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace Ink_Canvas.Controls.Toolbar
+{
+    /// <summary>
+    /// 单个工具栏按钮的用户配置（可见性、顺序、所属 slot、插入位置）。
+    /// 由 Settings.Toolbar 持久化。
+    /// </summary>
+    public class ToolbarItemConfig
+    {
+        [JsonProperty("visible")]
+        public bool Visible { get; set; } = true;
+
+        [JsonProperty("order")]
+        public int Order { get; set; }
+
+        [JsonProperty("slot")]
+        public ToolbarSlot Slot { get; set; } = ToolbarSlot.FloatingBarMain;
+
+        [JsonProperty("position")]
+        public ToolbarInsertPosition Position { get; set; } = ToolbarInsertPosition.Prepend;
+
+        [JsonProperty("anchorName")]
+        public string AnchorName { get; set; }
+    }
+
+    public class ToolbarLayoutSettings
+    {
+        [JsonProperty("items")]
+        public Dictionary<string, ToolbarItemConfig> Items { get; set; } = new Dictionary<string, ToolbarItemConfig>();
+    }
+}