Refactor StundePage and StundenPage layouts: adjust grid structure, improve margin handling, and enhance visuals with new binding and triggers.

Jugenddienst Stunden/Converter/AnyTrueMultiConverter.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using Microsoft.Maui.Controls;
+
+namespace Jugenddienst_Stunden.Converter;
+
+public class AnyTrueMultiConverter : IMultiValueConverter {
+	public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) {
+		foreach (object value in values) {
+			if (value is bool b && b) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) {
+	throw new NotSupportedException();
+}
+
+}