[chore:] changed Student.Result-Field-Type to array

MainWindow.axaml.cs

@@ -166,7 +166,7 @@ public partial class MainWindow : Window
         {
             try
             {
-                for(int i = 0; i<s.Result.Count;i++)
+                for(int i = 0; i<s.Result.Length;i++)
                 {
                     LbResult.Items.Add($"{s.Name} ({s.ID}) - {i+1}. Semester: {s.Result[i]}");
                 }

structs.cs

@@ -59,7 +59,7 @@ public class Student
     public string ID { get; set; } = "";        // ID des Schüler (z.B. NolteSeb)
     public string Name { get; set; } = "";        // Name des Schülers
     public List<string> SelectedCourseNames { get; set; } = new();
-    public List<string>? Result { get; set; } = null;
+    public string[] Result { get; set; } = new string[4];
 
     public Student()
     {