添加窗口任务栏功能，添加窗口的管理功能

Runtime/Form/WindowEntry.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+namespace XericUI.Form
+{
+    /// <summary>
+    /// 窗口数据描述对象 — 由 UIFormManager 创建和持有。
+    /// 描述一个窗口实例的标识信息、运行时引用、显示状态和层级关系。
+    /// </summary>
+    public class WindowEntry
+    {
+        #region 基本标识
+
+        /// <summary>唯一 ID（GUID）</summary>
+        public string Id { get; }
+
+        /// <summary>窗口标题</summary>
+        public string Title;
+
+        /// <summary>窗口图标（任务栏和标题栏使用）</summary>
+        public Sprite Icon;
+
+        /// <summary>任务栏图标着色</summary>
+        public Color TintColor = Color.white;
+
+        #endregion
+
+        #region 实例引用
+
+        /// <summary>运行时窗口实例</summary>
+        public UIFormController Controller;
+
+        /// <summary>窗口预制体引用</summary>
+        public RectTransform Prefab;
+
+        #endregion
+
+        #region 显示状态
+
+        /// <summary>当前窗口状态</summary>
+        public WindowState State;
+
+        /// <summary>是否在任务栏上显示图标</summary>
+        public bool ShowInTaskBar = true;
+
+        #endregion
+
+        #region 层级关系
+
+        /// <summary>父窗口 Entry（关闭父窗口时级联关闭子窗口）</summary>
+        public WindowEntry ParentEntry { get; private set; }
+
+        /// <summary>子窗口 Entry 列表</summary>
+        public readonly List<WindowEntry> ChildEntries = new List<WindowEntry>();
+
+        /// <summary>添加子窗口依赖</summary>
+        public void AddChild(WindowEntry child)
+        {
+            if (child == null || ChildEntries.Contains(child)) return;
+            child.ParentEntry = this;
+            ChildEntries.Add(child);
+        }
+
+        /// <summary>移除子窗口依赖</summary>
+        public void RemoveChild(WindowEntry child)
+        {
+            if (child == null) return;
+            child.ParentEntry = null;
+            ChildEntries.Remove(child);
+        }
+
+        #endregion
+
+        #region 进度
+
+        /// <summary>任务栏进度 (0-1)</summary>
+        public float Progress;
+
+        /// <summary>是否在任务栏显示进度条</summary>
+        public bool ShowProgress;
+
+        #endregion
+
+        #region 构造
+
+        public WindowEntry(string id)
+        {
+            Id = id ?? System.Guid.NewGuid().ToString();
+        }
+
+        public WindowEntry() : this(null) { }
+
+        #endregion
+    }
+
+    #region 委托
+
+    /// <summary>窗口 Entry 事件委托</summary>
+    public delegate void WindowEntryEventHandler(WindowEntry entry);
+
+    #endregion
+}