重构中day1，写了很多，不知道怎么说清楚

Workbench/Converters/CountToVisibilityConverter.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Data;
+using System.Windows;
+
+namespace Serein.Workbench.Converters
+{
+    public class CountToVisibilityConverter : IValueConverter
+    {
+        public bool Inverse { get; set; } = false; // 可选：反转逻辑
+
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is IEnumerable collection)
+            {
+                int count = 0;
+                foreach (var item in collection) count++;
+                bool visible = count > 0;
+                if (Inverse) visible = !visible;
+                return visible ? Visibility.Visible : Visibility.Collapsed;
+            }
+            return Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => throw new NotImplementedException();
+    }
+
+}