[fix:] first semester priority

crafter.cs

@@ -744,6 +744,87 @@ public class CourseCrafter
         return true;
     }
 
+    bool EnsureFirstSemesterCoverage()
+    {
+        bool changed = false;
+
+        foreach (var student in Settings.Instance.Students)
+        {
+            if (student.SelectedCourseNames.Count == 0)
+                continue;
+
+            var assignments = GetAssignmentsBySemester(student.ID);
+            if (assignments[0] != null)
+                continue;
+
+            if (TryAssignStudentToFirstSemester(student))
+                changed = true;
+        }
+
+        return changed;
+    }
+
+    bool TryAssignStudentToFirstSemester(Student student)
+    {
+        var desiredSports = student.SelectedCourseNames
+            .Select(ResolveSportFromSelection)
+            .Where(sp => sp != null && sp.Semester[0] != 0)
+            .DistinctBy(sp => sp!.Name)
+            .Select(sp => sp!)
+            .ToList();
+
+        foreach (var sport in desiredSports)
+        {
+            // Direkt in bestehendes Kursangebot eintragen
+            var existingCourse = GeneratedCourses
+                .FirstOrDefault(c => c.Semester == 1 && c.Instance.Sport.Name == sport.Name &&
+                                     c.Instance.Students.Count < c.Instance.Sport.MaxStudents);
+
+            if (existingCourse.Instance != null)
+            {
+                existingCourse.Instance.Students.Add(student.ID);
+                students_in_semester[0].Add(student.ID);
+                return true;
+            }
+
+            // Versuche einen Teilnehmer aus einem bestehenden Sem.1-Kurs umzudisponieren
+            var firstSemesterCourses = GeneratedCourses
+                .Where(c => c.Semester == 1 && c.Instance.Sport.Name == sport.Name)
+                .ToList();
+
+            foreach (var course in firstSemesterCourses)
+            {
+                if (course.Instance.Students.Count <= getEffectiveMinStudents(sport, 1))
+                    continue;
+
+                foreach (var otherStudent in course.Instance.Students.ToList())
+                {
+                    if (otherStudent == student.ID)
+                        continue;
+
+                    var targetCourse = GeneratedCourses
+                        .FirstOrDefault(c => c.Semester != 1 && c.Instance.Sport.Name == sport.Name &&
+                                             c.Instance.Students.Count < c.Instance.Sport.MaxStudents &&
+                                             !students_in_semester[c.Semester - 1].Contains(otherStudent));
+
+                    if (targetCourse.Instance == null)
+                        continue;
+
+                    course.Instance.Students.Remove(otherStudent);
+                    students_in_semester[0].Remove(otherStudent);
+                    targetCourse.Instance.Students.Add(otherStudent);
+                    students_in_semester[targetCourse.Semester - 1].Add(otherStudent);
+
+                    course.Instance.Students.Add(student.ID);
+                    students_in_semester[0].Add(student.ID);
+                    return true;
+                }
+            }
+        }
+
+        return false;
+    }
+
     (int Semester, CourseInstance Instance)?[] GetAssignmentsBySemester(string studentId)
     {
         var assignments = new (int Semester, CourseInstance Instance)?[4];
@@ -800,7 +881,8 @@ public class CourseCrafter
 
             if (freeInterestedStudents > maxFreeInterestedStudents ||
                 (freeInterestedStudents == maxFreeInterestedStudents &&
-                 totalCoursesPerSemester[i] < minCourses))
+                 (totalCoursesPerSemester[i] < minCourses ||
+                  (totalCoursesPerSemester[i] == minCourses && semesterNumber < bestSem))))
             {
                 maxFreeInterestedStudents = freeInterestedStudents;
                 minCourses = totalCoursesPerSemester[i];
@@ -811,6 +893,7 @@ public class CourseCrafter
         return bestSem;
     }
 
+    EnsureFirstSemesterCoverage();
     ReloadResult();
 }