重构中day1，写了很多，不知道怎么说清楚

Workbench/Services/KeyEventService.cs

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+/*
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.Services
+{
+    delegate void KeyDownEventHandler(Key key);
+    delegate void KeyUpEventHandler(Key key);
+
+    /// <summary>
+    /// 全局事件服务
+    /// </summary>
+    internal interface IKeyEventService
+    {
+        event KeyDownEventHandler KeyDown;
+        event KeyUpEventHandler KeyUp;
+
+        /// <summary>
+        /// 获取某个按键状态
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        bool GetKeyState(Key key);
+        /// <summary>
+        /// 设置某个按键的状态
+        /// </summary>
+        /// <param name="key"></param>
+        /// <param name="state"></param>
+        void SetKeyState(Key key, bool statestate);
+    }
+
+    /// <summary>
+    /// 管理按键状态
+    /// </summary>
+    internal class KeyEventService : IKeyEventService
+    {
+
+        /// <summary>
+        /// 按键按下
+        /// </summary>
+        public event KeyDownEventHandler KeyDown;
+        /// <summary>
+        /// 按键松开
+        /// </summary>
+        public event KeyUpEventHandler KeyUp;
+
+        public KeyEventService()
+        {
+            var arr = Enum.GetValues<Key>();
+            KeysState = new bool[arr.Length];
+
+            // 绑定快捷键
+            //HotKeyManager.SetHotKey(saveMenuItem, new KeyGesture(Key.S, KeyModifiers.Control));
+        }
+
+        private readonly bool[] KeysState;
+        public bool GetKeyState(Key key)
+        {
+            return KeysState[(int)key];
+        }
+        public void SetKeyState(Key key, bool state)
+        {
+            if (state)
+            {
+                KeyDown?.Invoke(key);
+            }
+            else
+            {
+                KeyUp?.Invoke(key);
+            }
+            //Debug.WriteLine($"按键事件：{key} - {state}");
+            KeysState[(int)key] = state;
+        }
+    }
+}
+*/