fix: 扫描时界面会因为文件名不同而抖动的问题

src/GUI/Converters/ValueConverters.cs

@@ -100,6 +100,43 @@ public class InverseBoolConverter : IValueConverter
     }
 }
 
+public class HalfDoubleConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is double d && !double.IsNaN(d) && !double.IsInfinity(d))
+            return d / 2.0;
+        return 400.0;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class MiddleTruncateConverter : IValueConverter
+{
+    private const int KeepTail = 10;
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not string text || string.IsNullOrEmpty(text)) return value;
+
+        int maxLength = 60;
+        if (parameter != null && int.TryParse(parameter.ToString(), NumberStyles.Integer, CultureInfo.InvariantCulture, out int parsed))
+            maxLength = parsed;
+
+        if (text.Length <= maxLength) return text;
+
+        int head = maxLength - KeepTail - 3;
+        if (head <= 0) return text[..maxLength];
+
+        return string.Concat(text.AsSpan(0, head), "...", text.AsSpan(text.Length - KeepTail, KeepTail));
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
 public static class ValueConverters
 {
     public static readonly IValueConverter DurationFormat = new DurationFormatConverter();
@@ -109,4 +146,6 @@ public static class ValueConverters
     public static readonly IValueConverter DurationToSliderMax = new DurationToSliderMaxConverter();
     public static readonly IValueConverter PositionFormat = new PositionFormatConverter();
     public static readonly IValueConverter InverseBool = new InverseBoolConverter();
+    public static readonly IValueConverter HalfDouble = new HalfDoubleConverter();
+    public static readonly IValueConverter MiddleTruncate = new MiddleTruncateConverter();
 }