命令树优化，测试编辑区域优化

DeviceCommand/Devices/IT6720.cs

@@ -133,6 +133,10 @@ namespace DeviceCommand.Devices
                 throw new Exception("IT6720 切换控制模式时通讯校验失败。");
         }
 
+        /// <summary>
+        /// 切换为本地（面板）控制模式，与远程控制互斥
+        /// </summary>
+        /// <param name="ct">取消令牌</param>
         public virtual async Task 切换本地控制模式(CancellationToken ct = default)
         {
             await 切换远程控制模式(false, ct);
@@ -150,6 +154,11 @@ namespace DeviceCommand.Devices
                 throw new Exception("IT6720 设置输出时通讯校验失败。");
         }
 
+        /// <summary>
+        /// 查询电源输出开关状态（由实时测量值的状态字节判断）
+        /// </summary>
+        /// <param name="ct">取消令牌</param>
+        /// <returns>输出开关状态字符串 (ON / OFF)</returns>
         public virtual async Task<string> 查询输出开关状态(CancellationToken ct = default)
         {
             var (_, _, status) = await 查询实时测量值(ct);
@@ -230,18 +239,28 @@ namespace DeviceCommand.Devices
             return (actualCurrent, actualVoltage, statusByte);
         }
 
+        /// <summary>
+        /// 查询电源的实时实际输出电压 (MEASure 相关寄存器)
+        /// </summary>
+        /// <param name="ct">取消令牌</param>
+        /// <returns>实时电压值 (单位: V，保留两位小数)</returns>
         [Monitorable("IT6720 实际电压")]
-        public virtual async Task<string> 查询实际电压(CancellationToken ct = default)
+        public virtual async Task<double> 查询实际电压(CancellationToken ct = default)
         {
             var (_, voltage, _) = await 查询实时测量值(ct);
-            return voltage.ToString("F2", CultureInfo.InvariantCulture);
+            return Math.Round(voltage, 2);
         }
 
+        /// <summary>
+        /// 查询电源的实时实际输出电流 (MEASure 相关寄存器)
+        /// </summary>
+        /// <param name="ct">取消令牌</param>
+        /// <returns>实时电流值 (单位: A，保留两位小数)</returns>
         [Monitorable("IT6720 实际电流")]
-        public virtual async Task<string> 查询实际电流(CancellationToken ct = default)
+        public virtual async Task<double> 查询实际电流(CancellationToken ct = default)
         {
             var (current, _, _) = await 查询实时测量值(ct);
-            return current.ToString("F3", CultureInfo.InvariantCulture);
+            return Math.Round(current, 2);
         }
 
         /// <summary>