Tagesflagge im Sitzplan, Leistungsüberblick mit Zielnoten-Rechner

- Mitarbeit: Tagesflagge (👑 Spitzentag / 😴 Schlaftag / ⚡ Schlechter Tag)
  je Schüler und Sitzung. Primär im Sitzplatz-Dialog (⇧1/2/3, ⇧X) mit
  Badge auf der Sitzplatz-Kachel; Fallback in der Schnelleingabe für
  Lerngruppen ohne Sitzplan.
- Noten: neuer Dialog "Überblick" in der Notenübersicht zeigt Klausuren,
  Mitarbeit- und sonstige Noten eines Schülers samt berechneter
  Zeugnisnote. Zielnoten-Rechner (ReportGradeTargetCalculator) beantwortet
  "was brauche ich noch für Note X", ein Was-wäre-wenn-Rechner simuliert
  eine zusätzliche Klausurnote. Bewerter-/Schülermodus per Umschalter im
  selben Fenster — Bewertermodus zeigt zusätzlich Kursdurchschnitt je
  Klausur und erlaubt das Bearbeiten von Mitarbeit-/Sonstige-Noten.
  Klausurverlauf als Balken-Sparkline wie die bestehende Notenentwicklung.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

LehrerApp.Desktop/ViewModels/Groups/GradeOverviewViewModels.cs

@@ -54,6 +54,7 @@ public partial class GradeOverviewTabViewModel : ObservableObject
     public Func<GradeOverviewRow, Task>? OnManageStudentGrades { get; set; }
     public Func<Task>? OnCollectiveGrade { get; set; }
     public Func<Task>? OnReportGrades { get; set; }
+    public Func<GradeOverviewRow, Task>? OnShowPerformanceOverview { get; set; }
 
     public GradeOverviewTabViewModel(IGradeRepository grades, IExamRepository exams,
         IExamResultRepository results, IStudentRepository students,
@@ -107,6 +108,14 @@ public partial class GradeOverviewTabViewModel : ObservableObject
         Recompute();
     }
 
+    [RelayCommand]
+    private async Task ShowPerformanceOverview()
+    {
+        if (SelectedRow is null || OnShowPerformanceOverview is null) return;
+        await OnShowPerformanceOverview(SelectedRow);
+        Recompute();
+    }
+
     [RelayCommand]
     private async Task CollectiveGrade()
     {

LehrerApp.Desktop/ViewModels/Groups/ParticipationViewModels.cs

@@ -158,6 +158,7 @@ public partial class ParticipationTabViewModel : ObservableObject
             row.OnCompetencyRatingChanged = (sid, code, val) => SaveCompetencyRating(sessionId, sid, code, val);
             row.HomeworkChangedCallback         = (sid, val) => SaveHomework(sessionId, sid, val);
             row.AttendanceChangedCallback       = (sid, val) => SaveAttendance(sessionId, sid, val);
+            row.DayHighlightChangedCallback     = (sid, val) => SaveDayHighlight(sessionId, sid, val);
             StudentRows.Add(row);
         }
         QuickInputCommand.NotifyCanExecuteChanged();
@@ -212,6 +213,15 @@ public partial class ParticipationTabViewModel : ObservableObject
         _entries.Save(entry);
     }
 
+    private void SaveDayHighlight(Guid sessionId, Guid studentId, DayHighlightKind? value)
+    {
+        if (IsReadOnly) return;
+        var entry = _entries.GetBySessionAndStudent(sessionId, studentId)
+                    ?? new ParticipationEntry { SessionId = sessionId, StudentId = studentId };
+        entry.DayHighlight = value;
+        _entries.Save(entry);
+    }
+
     [RelayCommand]
     private void ToggleCompetencyTags() => CompetencyTagsVisible = !CompetencyTagsVisible;
 
@@ -389,6 +399,7 @@ public partial class ParticipationStudentRow : ObservableObject
 
     [ObservableProperty] private HomeworkStatus? _homework;
     [ObservableProperty] private AttendanceStatus? _attendance;
+    [ObservableProperty] private DayHighlightKind? _dayHighlight;
 
     public string AttendanceLabel => AttendanceDisplay.ShortLabel(Attendance);
     public string AttendanceTooltip => AttendanceDisplay.Label(Attendance);
@@ -405,6 +416,7 @@ public partial class ParticipationStudentRow : ObservableObject
     public Action<Guid, string, int?>? OnCompetencyRatingChanged { get; set; }
     public Action<Guid, HomeworkStatus?>?  HomeworkChangedCallback   { get; set; }
     public Action<Guid, AttendanceStatus?>? AttendanceChangedCallback { get; set; }
+    public Action<Guid, DayHighlightKind?>? DayHighlightChangedCallback { get; set; }
 
     public ParticipationStudentRow(Guid id, string name, ParticipationEntry entry,
         List<AspectColumnDef> aspects, List<string> competencyCodes)
@@ -414,6 +426,7 @@ public partial class ParticipationStudentRow : ObservableObject
         _aspectDefs = aspects;
         _homework = HomeworkDisplay.Effective(entry);
         _attendance       = entry.Attendance;
+        _dayHighlight     = entry.DayHighlight;
 
         foreach (var a in aspects)
         {
@@ -463,6 +476,12 @@ public partial class ParticipationStudentRow : ObservableObject
         HomeworkChangedCallback?.Invoke(StudentId, value);
     }
 
+    public void SetDayHighlight(DayHighlightKind? value)
+    {
+        DayHighlight = value;
+        DayHighlightChangedCallback?.Invoke(StudentId, value);
+    }
+
     [RelayCommand]
     private void CycleAttendance()
     {
@@ -614,6 +633,27 @@ public static class AttendanceDisplay
     };
 }
 
+// ── Tagesflagge (Nutzer-Feedback) ──────────────────────────────────────────────
+
+public static class DayHighlightDisplay
+{
+    public static string Symbol(DayHighlightKind? kind) => kind switch
+    {
+        DayHighlightKind.Standout => "👑",
+        DayHighlightKind.Sleepy   => "😴",
+        DayHighlightKind.Rough    => "⚡",
+        _                         => "",
+    };
+
+    public static string Label(DayHighlightKind? kind) => kind switch
+    {
+        DayHighlightKind.Standout => "Spitzentag",
+        DayHighlightKind.Sleepy   => "Schlaftag",
+        DayHighlightKind.Rough    => "Schlechter Tag",
+        _                         => "Keine Markierung",
+    };
+}
+
 // ── Eine Bewertungszelle ──────────────────────────────────────────────────────
 
 public partial class RatingCell : ObservableObject
@@ -800,12 +840,31 @@ public partial class QuickInputViewModel : ObservableObject
     [ObservableProperty] private string _progressText = "";
     [ObservableProperty] private bool   _currentStudentIsAbsent;
     [ObservableProperty] private string _currentStudentAttendanceLabel = "";
+    [ObservableProperty] private DayHighlightKind? _currentStudentDayHighlight;
 
     /// Dimmt Name/Aspektliste, wenn der aktuelle Schüler abwesend ist — kein Blockieren der
     /// Eingabe (manche Bewertungssysteme wollen trotzdem einen Eintrag, z.B. "0 Punkte"), nur ein
     /// visueller Hinweis, dass eine Bewertung hier normalerweise keinen Sinn ergibt.
     public double CurrentStudentContentOpacity => CurrentStudentIsAbsent ? 0.4 : 1.0;
 
+    /// Tagesflagge (Nutzer-Feedback): Fallback für Kurse ohne Sitzplan — im Sitzplatz-Dialog gibt
+    /// es dieselbe Auswahl bereits über SeatAssessmentViewModel.DayHighlightChoices.
+    public string CurrentStudentDayHighlightSymbol => DayHighlightDisplay.Symbol(CurrentStudentDayHighlight);
+    public string CurrentStudentDayHighlightLabel => DayHighlightDisplay.Label(CurrentStudentDayHighlight);
+
+    public void SetDayHighlight(DayHighlightKind? value)
+    {
+        if (_rows.Count == 0) return;
+        _rows[StudentIndex].SetDayHighlight(value);
+        CurrentStudentDayHighlight = value;
+    }
+
+    partial void OnCurrentStudentDayHighlightChanged(DayHighlightKind? value)
+    {
+        OnPropertyChanged(nameof(CurrentStudentDayHighlightSymbol));
+        OnPropertyChanged(nameof(CurrentStudentDayHighlightLabel));
+    }
+
     public ObservableCollection<QuickAspectRow> AspectRows { get; } = [];
 
     /// Wechselt je nach Typ des aktuell gewählten Aspekts (3.1.3) — Scale3/Binary haben andere
@@ -824,7 +883,8 @@ public partial class QuickInputViewModel : ObservableObject
                 _ => "1–5 bewerten",
             };
             return $"{ratingHint}  ·  Q/W/E/R/T Aspekt wählen  ·  Leertaste/↓ nächster Aspekt  ·  ↑ vorheriger Aspekt  ·  " +
-                   "Enter/→ nächster Schüler  ·  Backspace/← vorheriger Schüler  ·  +/− anpassen  ·  Entf nicht bewertet  ·  Esc schließen";
+                   "Enter/→ nächster Schüler  ·  Backspace/← vorheriger Schüler  ·  +/− anpassen  ·  Entf nicht bewertet  ·  " +
+                   "⇧1/2/3 Tagesflagge, ⇧0 löschen  ·  Esc schließen";
         }
     }
 
@@ -852,6 +912,7 @@ public partial class QuickInputViewModel : ObservableObject
         ProgressText = $"{index + 1} / {_rows.Count}";
         CurrentStudentIsAbsent = row.IsAbsent;
         CurrentStudentAttendanceLabel = row.AttendanceTooltip;
+        CurrentStudentDayHighlight = row.DayHighlight;
 
         AspectRows.Clear();
         foreach (var (a, i) in _aspects.Select((a, i) => (a, i)))

LehrerApp.Desktop/ViewModels/Groups/SeatingPlanViewModels.cs

@@ -547,11 +547,13 @@ public partial class SeatCellViewModel : ObservableObject
     [ObservableProperty] private double _lessonOpacity = 1.0;
     [ObservableProperty] private string _attendanceBadge = "";
     [ObservableProperty] private string _homeworkBadge = "";
+    [ObservableProperty] private string _dayHighlightBadge = "";
     [ObservableProperty] private int _raisedHandCount;
     [ObservableProperty] private int _calledOnCount;
     public ObservableCollection<SituationTagChoice> SituationTags { get; } = [];
     public bool HasAttendanceBadge => AttendanceBadge.Length > 0;
     public bool HasHomeworkBadge => HomeworkBadge.Length > 0;
+    public bool HasDayHighlightBadge => DayHighlightBadge.Length > 0;
     public bool ShowLessonOverview => IsOccupied && !CanEdit;
     [ObservableProperty] private bool _canRecordLesson;
     public bool IsOccupied => SelectedOption.StudentId.HasValue;
@@ -644,6 +646,7 @@ public partial class SeatCellViewModel : ObservableObject
         var attendance = entry?.Attendance;
         AttendanceBadge = attendance is null ? "" : AttendanceDisplay.ShortLabel(attendance);
         HomeworkBadge = entry is null ? "" : HomeworkDisplay.Symbol(HomeworkDisplay.Effective(entry));
+        DayHighlightBadge = DayHighlightDisplay.Symbol(entry?.DayHighlight);
         RaisedHandCount = entry?.RaisedHandCount ?? 0;
         CalledOnCount = entry?.CalledOnCount ?? 0;
         LessonOpacity = attendance is not null and not AttendanceStatus.Present
@@ -652,6 +655,7 @@ public partial class SeatCellViewModel : ObservableObject
         foreach (var choice in SituationTags) choice.IsSelected = selected.Contains(choice.Text);
         OnPropertyChanged(nameof(HasAttendanceBadge));
         OnPropertyChanged(nameof(HasHomeworkBadge));
+        OnPropertyChanged(nameof(HasDayHighlightBadge));
     }
 }
 
@@ -677,6 +681,7 @@ public partial class SeatAssessmentViewModel : ObservableObject
     [ObservableProperty] private int _selectedAspectIndex;
     [ObservableProperty] private string _attendanceLabel = "Noch nicht kontrolliert";
     [ObservableProperty] private string _homeworkLabel = "Keine Hausaufgabe aufgegeben";
+    [ObservableProperty] private string _dayHighlightLabel = "Keine Markierung";
 
     public string StudentName { get; }
     public string SessionDisplay { get; }
@@ -687,6 +692,7 @@ public partial class SeatAssessmentViewModel : ObservableObject
     public ObservableCollection<SeatAssessmentAspectRow> AspectRows { get; } = [];
     public ObservableCollection<SeatAttendanceChoice> AttendanceChoices { get; } = [];
     public ObservableCollection<SeatHomeworkChoice> HomeworkChoices { get; } = [];
+    public ObservableCollection<SeatDayHighlightChoice> DayHighlightChoices { get; } = [];
 
     public SeatAssessmentViewModel(IParticipationSessionRepository sessions,
         IParticipationRepository entries, IParticipationAspectRepository aspects,
@@ -729,6 +735,7 @@ public partial class SeatAssessmentViewModel : ObservableObject
 
         BuildAttendanceChoices();
         BuildHomeworkChoices();
+        BuildDayHighlightChoices();
         RefreshStatusChoices();
         SelectAspect(0);
     }
@@ -761,6 +768,17 @@ public partial class SeatAssessmentViewModel : ObservableObject
         HomeworkChoices.Add(new("·", "Keine aufgegeben", "⌥X", null, SetHomework));
     }
 
+    private void BuildDayHighlightChoices()
+    {
+        DayHighlightChoices.Add(new(DayHighlightDisplay.Symbol(DayHighlightKind.Standout),
+            DayHighlightDisplay.Label(DayHighlightKind.Standout), "⇧1", DayHighlightKind.Standout, SetDayHighlight));
+        DayHighlightChoices.Add(new(DayHighlightDisplay.Symbol(DayHighlightKind.Sleepy),
+            DayHighlightDisplay.Label(DayHighlightKind.Sleepy), "⇧2", DayHighlightKind.Sleepy, SetDayHighlight));
+        DayHighlightChoices.Add(new(DayHighlightDisplay.Symbol(DayHighlightKind.Rough),
+            DayHighlightDisplay.Label(DayHighlightKind.Rough), "⇧3", DayHighlightKind.Rough, SetDayHighlight));
+        DayHighlightChoices.Add(new("·", "Keine Markierung", "⇧X", null, SetDayHighlight));
+    }
+
     public void SelectAspect(int index)
     {
         if (index < 0 || index >= AspectRows.Count) return;
@@ -827,6 +845,17 @@ public partial class SeatAssessmentViewModel : ObservableObject
         if (clear || digit is 0 or 1 or 3 or 4 or 5 or 7 or 8) SetHomework(status);
     }
 
+    public void ApplyDayHighlightShortcut(int? digit, bool clear)
+    {
+        if (!CanEdit) return;
+        var kind = clear ? null : digit switch
+        {
+            1 => DayHighlightKind.Standout, 2 => DayHighlightKind.Sleepy, 3 => DayHighlightKind.Rough,
+            _ => (DayHighlightKind?)null,
+        };
+        if (clear || digit is 1 or 2 or 3) SetDayHighlight(kind);
+    }
+
     private void ApplyRating(string key, int? value)
     {
         if (!CanEdit || _entry is null) return;
@@ -857,13 +886,23 @@ public partial class SeatAssessmentViewModel : ObservableObject
         RefreshStatusChoices();
     }
 
+    private void SetDayHighlight(DayHighlightKind? kind)
+    {
+        if (!CanEdit || _entry is null) return;
+        _entry.DayHighlight = kind;
+        _entries.Save(_entry);
+        RefreshStatusChoices();
+    }
+
     private void RefreshStatusChoices()
     {
         AttendanceLabel = AttendanceDisplay.Label(_entry?.Attendance);
         HomeworkLabel = HomeworkDisplay.Label(_entry is null ? null : HomeworkDisplay.Effective(_entry));
+        DayHighlightLabel = DayHighlightDisplay.Label(_entry?.DayHighlight);
         foreach (var choice in AttendanceChoices) choice.IsSelected = choice.Status == _entry?.Attendance;
         var homework = _entry is null ? null : HomeworkDisplay.Effective(_entry);
         foreach (var choice in HomeworkChoices) choice.IsSelected = choice.Status == homework;
+        foreach (var choice in DayHighlightChoices) choice.IsSelected = choice.Kind == _entry?.DayHighlight;
     }
 }
 
@@ -966,6 +1005,17 @@ public partial class SeatHomeworkChoice(string symbol, string label, string shor
     [RelayCommand] private void Apply() => apply(Status);
 }
 
+public partial class SeatDayHighlightChoice(string symbol, string label, string shortcut,
+    DayHighlightKind? kind, Action<DayHighlightKind?> apply) : ObservableObject
+{
+    public string Symbol { get; } = symbol;
+    public string Label { get; } = label;
+    public string Shortcut { get; } = shortcut;
+    public DayHighlightKind? Kind { get; } = kind;
+    [ObservableProperty] private bool _isSelected;
+    [RelayCommand] private void Apply() => apply(Kind);
+}
+
 public partial class SeatingPlanDialogViewModel : ObservableObject
 {
     private readonly ISeatingPlanRepository _plans;

LehrerApp.Desktop/ViewModels/Groups/StudentPerformanceOverviewViewModel.cs

@@ -0,0 +1,310 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using LehrerApp.Core.Interfaces;
+using LehrerApp.Core.Models;
+using LehrerApp.Core.Services;
+using LehrerApp.Desktop.ViewModels.Students;
+using System.Collections.ObjectModel;
+using System.Globalization;
+
+namespace LehrerApp.Desktop.ViewModels.Groups;
+
+// ── Schüler-Leistungsüberblick + Zielnoten-Rechner (Nutzer-Feedback) ─────────────
+//
+// Zeigt die Leistungen eines einzelnen Schülers in einem Kurs im Überblick — Klausuren,
+// Mitarbeit- und sonstige Noten, die daraus berechnete Zeugnisnote sowie zwei Rechner
+// ("Zielnote": was brauche ich noch? / "Was-wäre-wenn": wie wirkt sich eine zusätzliche
+// Klausurnote aus?). Bewusst pro Kurs statt fächerübergreifend, da Gewichtungsschema und
+// Notensystem am Kurs hängen. Zwei Modi über IsTeacherMode: im Bewertermodus zusätzlich
+// Kursdurchschnitt je Klausur und Bearbeitbarkeit der Mitarbeit-/Sonstige-Noten; im
+// Schülermodus ausschließlich die eigenen Werte, rein lesend — gedacht, um den Bildschirm im
+// Gespräch umzudrehen. Exam-Noten bleiben bewusst nur lesbar: eine Korrektur läuft weiterhin
+// über den bestehenden ExamGradingDialog, der die Punkte-Struktur konsistent hält — direktes
+// Überschreiben von Exam.Grade hier könnte mit ExamResult.Points/TotalPoints auseinanderlaufen.
+public partial class StudentPerformanceOverviewViewModel : ObservableObject
+{
+    private readonly IGradeRepository _grades;
+    private readonly IExamRepository _exams;
+    private readonly IExamResultRepository _results;
+    private readonly IGroupMembershipRepository _memberships;
+    private readonly IGradingSchemeRepository _schemes;
+    private readonly GradingService _grading;
+
+    private readonly Guid _groupId;
+    private readonly Guid _studentId;
+    private readonly GroupType _groupType;
+    private readonly GradingSystem _gradingSystem;
+    private readonly string _schoolYear;
+
+    private GradingScheme _scheme = new();
+    private double? _examsAverage;
+    private double? _participationAverage;
+    private double? _otherAverage;
+    private List<(string Grade, double Weight)> _examGradesRaw = [];
+    private List<(string Grade, double Weight)> _participationGradesRaw = [];
+    private List<(string Grade, double Weight)> _otherGradesRaw = [];
+
+    public string StudentName { get; }
+    public string GroupLabel { get; }
+
+    [ObservableProperty] private ParticipationPeriodOption _selectedPeriod;
+    [ObservableProperty] private bool _isTeacherMode = true;
+    [ObservableProperty] private string _schemeSummary = "";
+    [ObservableProperty] private string? _examsAverageDisplay;
+    [ObservableProperty] private string? _participationAverageDisplay;
+    [ObservableProperty] private string? _otherAverageDisplay;
+    [ObservableProperty] private string _currentReportGradeDisplay = "";
+
+    [ObservableProperty] private string _targetGradeText = "";
+    [ObservableProperty] private GradeBucketKind _targetBucket = GradeBucketKind.Exams;
+    [ObservableProperty] private string _targetResultDisplay = "";
+
+    [ObservableProperty] private string _whatIfExamGradeText = "";
+    [ObservableProperty] private string _whatIfResultDisplay = "";
+
+    public List<ParticipationPeriodOption> PeriodOptions { get; } =
+    [
+        new(ParticipationPeriod.FullYear, "Gesamtes Schuljahr"),
+        new(ParticipationPeriod.H1, "1. Halbjahr"),
+        new(ParticipationPeriod.H2, "2. Halbjahr"),
+    ];
+
+    public string[] TargetBucketOptions { get; } = ["Klausuren", "Mitarbeit", "Sonstige"];
+
+    public string TargetBucketName
+    {
+        get => TargetBucket switch
+        {
+            GradeBucketKind.Participation => "Mitarbeit",
+            GradeBucketKind.Other => "Sonstige",
+            _ => "Klausuren",
+        };
+        set => TargetBucket = value switch
+        {
+            "Mitarbeit" => GradeBucketKind.Participation,
+            "Sonstige" => GradeBucketKind.Other,
+            _ => GradeBucketKind.Exams,
+        };
+    }
+
+    public ObservableCollection<StudentExamRow> ExamRows { get; } = [];
+    /// Eigener Verlauf (Nutzer-Feedback): dieselbe Balken-Sparkline wie die bestehende
+    /// Notenentwicklung im Schülerdetail (2.5), hier nur auf die Klausuren dieses Kurses
+    /// beschränkt statt aller Lerngruppen — passt zum Kursdurchschnitt-Vergleich je Klausur.
+    public StudentGradeHistoryGroup ExamHistory { get; } = new("Klausurverlauf");
+    public ObservableCollection<StudentSimpleGradeRow> ParticipationRows { get; } = [];
+    public ObservableCollection<StudentSimpleGradeRow> OtherRows { get; } = [];
+
+    public StudentPerformanceOverviewViewModel(IGradeRepository grades, IExamRepository exams,
+        IExamResultRepository results, IGroupMembershipRepository memberships,
+        IGradingSchemeRepository schemes, GradingService grading,
+        Guid groupId, Guid studentId, GroupType groupType, GradingSystem gradingSystem,
+        string studentName, string groupLabel, string schoolYear)
+    {
+        _grades = grades; _exams = exams; _results = results; _memberships = memberships;
+        _schemes = schemes; _grading = grading;
+        _groupId = groupId; _studentId = studentId; _groupType = groupType;
+        _gradingSystem = gradingSystem; _schoolYear = schoolYear;
+        StudentName = studentName; GroupLabel = groupLabel;
+
+        _selectedPeriod = PeriodOptions[0];
+        Recompute();
+    }
+
+    partial void OnSelectedPeriodChanged(ParticipationPeriodOption value) => Recompute();
+
+    public string ModeButtonLabel => IsTeacherMode ? "Modus: Bewerter" : "Modus: Schüler";
+
+    partial void OnIsTeacherModeChanged(bool value) => OnPropertyChanged(nameof(ModeButtonLabel));
+
+    [RelayCommand]
+    private void ToggleMode() => IsTeacherMode = !IsTeacherMode;
+
+    private GradingScheme ResolveScheme() =>
+        _schemes.GetByGroup(_groupId)
+        ?? _schemes.GetDefaultForType(_groupType)
+        ?? new GradingScheme { ExamsPercent = 50, ParticipationPercent = 40, OtherPercent = 10 };
+
+    private void Recompute()
+    {
+        _scheme = ResolveScheme();
+        SchemeSummary = $"Klausuren {_scheme.ExamsPercent:0.#} % · Mitarbeit {_scheme.ParticipationPercent:0.#} % · " +
+                         $"Sonstige {_scheme.OtherPercent:0.#} %";
+
+        var (periodFrom, periodTo) = GroupMembershipService.SchoolYearPeriod(_schoolYear, SelectedPeriod.Period switch
+        {
+            ParticipationPeriod.H1 => SchoolYearPeriodKind.H1,
+            ParticipationPeriod.H2 => SchoolYearPeriodKind.H2,
+            _ => SchoolYearPeriodKind.FullYear,
+        });
+        var membership = _memberships.GetByGroup(_groupId).FirstOrDefault(m => m.StudentId == _studentId);
+
+        // ── Klausuren ─────────────────────────────────────────────────────
+        ExamRows.Clear();
+        ExamHistory.Points.Clear();
+        _examGradesRaw = [];
+        int? previousNoteEquivalent = null;
+        foreach (var exam in _exams.GetByGroup(_groupId)
+                     .Where(e => e.Date >= periodFrom && e.Date <= periodTo)
+                     .Where(e => membership is null || GroupMembershipService.IsActiveOn(membership, e.Date))
+                     .Where(e => !e.Niveau.HasValue || membership?.Niveau == e.Niveau)
+                     .OrderBy(e => e.Date))
+        {
+            var allResults = _results.GetByExam(exam.Id);
+            var own = allResults.FirstOrDefault(r => r.StudentId == _studentId);
+            string? ownGrade = own is { Absent: false, Grade: not null } ? own.Grade : null;
+            if (ownGrade is not null) _examGradesRaw.Add((ownGrade, 1.0));
+
+            var classGrades = allResults.Where(r => !r.Absent && r.Grade is not null)
+                .Select(r => (r.Grade!, 1.0)).ToList();
+            var classAverage = classGrades.Count > 0 ? _grading.WeightedAverage(classGrades) : (double?)null;
+
+            ExamRows.Add(new StudentExamRow(exam.Title, exam.Date, ownGrade,
+                classAverage.HasValue ? FormatGrade(classAverage.Value) : "–"));
+
+            // Gleiche Balken-Sparkline wie die bestehende Notenentwicklung (2.5): Rohwert auf die
+            // 1..6-Notenäquivalent-Achse abbilden, damit Grades1To6 und Points0To15 dieselbe
+            // Balkenhöhen-Formel nutzen können.
+            int? noteEquivalent = ownGrade is not null && int.TryParse(ownGrade, out var raw)
+                ? (_gradingSystem == GradingSystem.Grades1To6 ? raw : int.Parse(PointsNoteMapping.PointsToNote(raw)))
+                : null;
+            var isFailing = noteEquivalent is >= 5;
+            var isDrop = noteEquivalent.HasValue && previousNoteEquivalent.HasValue
+                         && noteEquivalent.Value - previousNoteEquivalent.Value >= 1;
+            var warnings = new List<string>();
+            if (isDrop) warnings.Add("Abfall um ≥ 1 Note");
+            if (isFailing) warnings.Add("Versetzungsgefährdung");
+            ExamHistory.Points.Add(new GradeHistoryPoint(exam.Date, exam.Title, ownGrade ?? "–",
+                noteEquivalent, warnings.Count > 0, string.Join(" · ", warnings)));
+            if (noteEquivalent.HasValue) previousNoteEquivalent = noteEquivalent;
+        }
+        _examsAverage = _examGradesRaw.Count > 0 ? _grading.WeightedAverage(_examGradesRaw) : null;
+
+        // ── Mitarbeit & Sonstige ──────────────────────────────────────────
+        var allGrades = _grades.GetByStudentAndGroup(_studentId, _groupId)
+            .Where(g => g.Date >= periodFrom && g.Date <= periodTo)
+            .Where(g => membership is null || GroupMembershipService.IsActiveOn(membership, g.Date))
+            .OrderBy(g => g.Date).ToList();
+
+        ParticipationRows.Clear();
+        _participationGradesRaw = [];
+        foreach (var g in allGrades.Where(g => g.Category == GradeCategory.Participation))
+        {
+            _participationGradesRaw.Add((g.Value, g.Weight));
+            ParticipationRows.Add(new StudentSimpleGradeRow(g, SaveGrade));
+        }
+        _participationAverage = _participationGradesRaw.Count > 0 ? _grading.WeightedAverage(_participationGradesRaw) : null;
+
+        OtherRows.Clear();
+        _otherGradesRaw = [];
+        foreach (var g in allGrades.Where(g => g.Category != GradeCategory.Participation))
+        {
+            _otherGradesRaw.Add((g.Value, g.Weight));
+            OtherRows.Add(new StudentSimpleGradeRow(g, SaveGrade));
+        }
+        _otherAverage = _otherGradesRaw.Count > 0 ? _grading.WeightedAverage(_otherGradesRaw) : null;
+
+        ExamsAverageDisplay = _examsAverage.HasValue ? FormatGrade(_examsAverage.Value) : null;
+        ParticipationAverageDisplay = _participationAverage.HasValue ? FormatGrade(_participationAverage.Value) : null;
+        OtherAverageDisplay = _otherAverage.HasValue ? FormatGrade(_otherAverage.Value) : null;
+
+        var reportGrade = _grading.CalculateReportGrade(_examGradesRaw, _participationGradesRaw, _otherGradesRaw,
+            _scheme, _gradingSystem, RoundingRule.Commercial);
+        CurrentReportGradeDisplay = reportGrade is null
+            ? "Noch nicht berechenbar — keine Werte im gewählten Zeitraum."
+            : $"Note {reportGrade}";
+
+        RecomputeTarget();
+        RecomputeWhatIf();
+    }
+
+    private void SaveGrade(Grade grade)
+    {
+        _grades.Save(grade);
+        Recompute();
+    }
+
+    partial void OnTargetGradeTextChanged(string value) => RecomputeTarget();
+    partial void OnTargetBucketChanged(GradeBucketKind value)
+    {
+        OnPropertyChanged(nameof(TargetBucketName));
+        RecomputeTarget();
+    }
+
+    private void RecomputeTarget()
+    {
+        if (!TryParseGrade(TargetGradeText, out var target))
+        {
+            TargetResultDisplay = "";
+            return;
+        }
+
+        var result = ReportGradeTargetCalculator.SolveRequiredAverage(target, TargetBucket,
+            _examsAverage, _participationAverage, _otherAverage, _scheme, _gradingSystem);
+
+        TargetResultDisplay = result switch
+        {
+            null => $"{TargetBucketName} fließt laut Gewichtungsschema nicht in die Zeugnisnote ein.",
+            { IsAchievable: true } r => $"Nötiger Schnitt in {TargetBucketName}: {FormatGrade(r.RequiredAverage)}",
+            { IsAchievable: false } r =>
+                $"Mit den übrigen Bereichen rechnerisch nicht mehr erreichbar (bräuchte {FormatGrade(r.RequiredAverage)}).",
+        };
+    }
+
+    partial void OnWhatIfExamGradeTextChanged(string value) => RecomputeWhatIf();
+
+    private void RecomputeWhatIf()
+    {
+        if (string.IsNullOrWhiteSpace(WhatIfExamGradeText))
+        {
+            WhatIfResultDisplay = "";
+            return;
+        }
+
+        var hypothetical = new List<(string Grade, double Weight)>(_examGradesRaw) { (WhatIfExamGradeText.Trim(), 1.0) };
+        var result = _grading.CalculateReportGrade(hypothetical, _participationGradesRaw, _otherGradesRaw,
+            _scheme, _gradingSystem, RoundingRule.Commercial);
+        WhatIfResultDisplay = result is null
+            ? "Ungültige Note."
+            : $"Zeugnisnote mit dieser zusätzlichen Klausurnote: {result}";
+    }
+
+    private static bool TryParseGrade(string text, out double value) =>
+        double.TryParse(text.Trim().Replace(',', '.'), NumberStyles.Float, CultureInfo.InvariantCulture, out value);
+
+    private static string FormatGrade(double value) => value.ToString("0.0", CultureInfo.InvariantCulture);
+}
+
+public class StudentExamRow(string title, DateOnly date, string? ownGrade, string classAverageDisplay)
+{
+    public string Title { get; } = title;
+    public string DateDisplay { get; } = date.ToString("dd.MM.yyyy");
+    public string OwnGradeDisplay { get; } = ownGrade ?? "–";
+    public string ClassAverageDisplay { get; } = classAverageDisplay;
+}
+
+public partial class StudentSimpleGradeRow : ObservableObject
+{
+    private readonly Grade _grade;
+    private readonly Action<Grade> _save;
+
+    public string CategoryLabel { get; }
+    public string DateDisplay { get; }
+    [ObservableProperty] private string _value;
+
+    public StudentSimpleGradeRow(Grade grade, Action<Grade> save)
+    {
+        _grade = grade;
+        _save = save;
+        CategoryLabel = GradeCategoryDisplay.Label(grade.Category);
+        DateDisplay = grade.Date.ToString("dd.MM.yyyy");
+        _value = grade.Value;
+    }
+
+    [RelayCommand]
+    private void Save()
+    {
+        _grade.Value = Value.Trim();
+        _save(_grade);
+    }
+}

LehrerApp.Desktop/Views/Groups/GradeOverviewTabView.axaml

@@ -19,6 +19,9 @@
       <Button Content="Noten verwalten" Command="{Binding ManageStudentGradesCommand}" Margin="12,0,0,0"
               IsVisible="{Binding SelectedRow, Converter={x:Static ObjectConverters.IsNotNull}}"
               IsEnabled="{Binding !IsReadOnly}"/>
+      <Button Content="Überblick" Command="{Binding ShowPerformanceOverviewCommand}" Margin="6,0,0,0"
+              IsVisible="{Binding SelectedRow, Converter={x:Static ObjectConverters.IsNotNull}}"
+              ToolTip.Tip="Leistungsüberblick mit Zielnoten-Rechner für diesen Schüler"/>
       <Button Content="＋ Sammelnote" Command="{Binding CollectiveGradeCommand}" IsEnabled="{Binding !IsReadOnly}"/>
       <Button Content="Zeugnisnoten" Command="{Binding ReportGradesCommand}" IsEnabled="{Binding !IsReadOnly}"/>
       <Button Content="Als PDF" Click="OnExportPdfClick" Margin="12,0,0,0"

LehrerApp.Desktop/Views/Groups/GradeOverviewTabView.axaml.cs

@@ -25,6 +25,7 @@ public partial class GradeOverviewTabView : UserControl
             vm.OnManageStudentGrades = ShowStudentGradesDialog;
             vm.OnCollectiveGrade = ShowCollectiveGradeDialog;
             vm.OnReportGrades = ShowReportGradesDialog;
+            vm.OnShowPerformanceOverview = ShowPerformanceOverviewDialog;
             vm.PropertyChanged += (_, pe) =>
             {
                 if (pe.PropertyName == nameof(GradeOverviewTabViewModel.RebuildColumnsSignal))
@@ -79,6 +80,22 @@ public partial class GradeOverviewTabView : UserControl
         if (owner is not null) await dialog.ShowDialog(owner);
     }
 
+    private async Task ShowPerformanceOverviewDialog(GradeOverviewRow row)
+    {
+        var dialogVm = new StudentPerformanceOverviewViewModel(
+            App.Services.GetRequiredService<IGradeRepository>(),
+            App.Services.GetRequiredService<IExamRepository>(),
+            App.Services.GetRequiredService<IExamResultRepository>(),
+            App.Services.GetRequiredService<IGroupMembershipRepository>(),
+            App.Services.GetRequiredService<IGradingSchemeRepository>(),
+            App.Services.GetRequiredService<GradingService>(),
+            _vm!.GroupId, row.StudentId, _vm.GroupType, _vm.GradingSystem, row.Name, _vm.GroupLabel, _vm.SchoolYear);
+
+        var dialog = new StudentPerformanceOverviewDialog { DataContext = dialogVm };
+        var owner = TopLevel.GetTopLevel(this) as Window;
+        if (owner is not null) await dialog.ShowDialog(owner);
+    }
+
     private async void OnExportPdfClick(object? sender, RoutedEventArgs e)
     {
         var topLevel = TopLevel.GetTopLevel(this);

LehrerApp.Desktop/Views/Groups/ParticipationQuickInputDialog.axaml

@@ -12,8 +12,12 @@
     <!-- Schülername + Fortschritt -->
     <Grid Grid.Row="0" ColumnDefinitions="*,Auto" Margin="0,0,0,16">
       <StackPanel Grid.Column="0">
-        <TextBlock Text="{Binding StudentName}" FontSize="22" FontWeight="SemiBold"
-                   Opacity="{Binding CurrentStudentContentOpacity}"/>
+        <StackPanel Orientation="Horizontal" Spacing="6">
+          <TextBlock Text="{Binding StudentName}" FontSize="22" FontWeight="SemiBold"
+                     Opacity="{Binding CurrentStudentContentOpacity}"/>
+          <TextBlock Text="{Binding CurrentStudentDayHighlightSymbol}" FontSize="20"
+                     VerticalAlignment="Center" ToolTip.Tip="{Binding CurrentStudentDayHighlightLabel}"/>
+        </StackPanel>
         <TextBlock Text="{Binding CurrentAspectLabel}" FontSize="13" Opacity="0.5"
                    IsVisible="{Binding !CurrentStudentIsAbsent}"/>
         <TextBlock Text="{Binding CurrentStudentAttendanceLabel, StringFormat='⚠ Abwesend — {0}'}"

LehrerApp.Desktop/Views/Groups/ParticipationQuickInputDialog.axaml.cs

@@ -1,6 +1,7 @@
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Interactivity;
+using LehrerApp.Core.Models;
 using LehrerApp.Desktop.ViewModels.Groups;
 
 namespace LehrerApp.Desktop.Views.Groups;
@@ -19,6 +20,18 @@ public partial class ParticipationQuickInputDialog : Window
     {
         if (DataContext is not QuickInputViewModel vm) { base.OnKeyDown(e); return; }
 
+        if (e.KeyModifiers.HasFlag(KeyModifiers.Shift))
+        {
+            switch (e.Key)
+            {
+                case Key.D1 or Key.NumPad1: vm.SetDayHighlight(DayHighlightKind.Standout); e.Handled = true; break;
+                case Key.D2 or Key.NumPad2: vm.SetDayHighlight(DayHighlightKind.Sleepy);   e.Handled = true; break;
+                case Key.D3 or Key.NumPad3: vm.SetDayHighlight(DayHighlightKind.Rough);    e.Handled = true; break;
+                case Key.D0 or Key.NumPad0: vm.SetDayHighlight(null);                      e.Handled = true; break;
+            }
+            if (e.Handled) return;
+        }
+
         switch (e.Key)
         {
             case Key.D0 or Key.NumPad0: vm.SetRatingByNumber(0); e.Handled = true; break;

LehrerApp.Desktop/Views/Groups/SeatAssessmentDialog.axaml

@@ -128,10 +128,30 @@
             </ItemsControl.ItemTemplate>
           </ItemsControl>
         </StackPanel>
+
+        <StackPanel Spacing="7">
+          <TextBlock Text="TAGESFLAGGE" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+          <TextBlock Text="{Binding DayHighlightLabel}" FontSize="12"/>
+          <ItemsControl ItemsSource="{Binding DayHighlightChoices}">
+            <ItemsControl.ItemsPanel><ItemsPanelTemplate><WrapPanel/></ItemsPanelTemplate></ItemsControl.ItemsPanel>
+            <ItemsControl.ItemTemplate>
+              <DataTemplate x:DataType="vm:SeatDayHighlightChoice">
+                <Button Classes="choice" Classes.selected="{Binding IsSelected}"
+                        Command="{Binding ApplyCommand}" Margin="2">
+                  <StackPanel Orientation="Horizontal" Spacing="5">
+                    <TextBlock Text="{Binding Symbol}" FontWeight="Bold"/>
+                    <TextBlock Text="{Binding Label}"/>
+                    <TextBlock Text="{Binding Shortcut}" FontSize="9" Opacity="0.5" VerticalAlignment="Center"/>
+                  </StackPanel>
+                </Button>
+              </DataTemplate>
+            </ItemsControl.ItemTemplate>
+          </ItemsControl>
+        </StackPanel>
       </StackPanel>
     </ScrollViewer>
 
     <TextBlock Grid.Row="2" Margin="0,12,0,0" FontSize="10" Opacity="0.55" TextWrapping="Wrap"
-               Text="Mitarbeit: Q/W/E/R/T Aspekt · 1–5 Bewertung · +/− anpassen · Backspace löschen · ←/→ Aspekt  |  Anwesenheit: Strg+1/2/5/7/9/0, Strg+X  |  Hausaufgaben: ⌥+1/3/4/5/7/8/0, ⌥+X  |  Esc schließen"/>
+               Text="Mitarbeit: Q/W/E/R/T Aspekt · 1–5 Bewertung · +/− anpassen · Backspace löschen · ←/→ Aspekt  |  Anwesenheit: Strg+1/2/5/7/9/0, Strg+X  |  Hausaufgaben: ⌥+1/3/4/5/7/8/0, ⌥+X  |  Tagesflagge: ⇧1/2/3, ⇧X  |  Esc schließen"/>
   </Grid>
 </Window>

LehrerApp.Desktop/Views/Groups/SeatAssessmentDialog.axaml.cs

@@ -36,6 +36,12 @@ public partial class SeatAssessmentDialog : Window
             e.Handled = clear || digit is not null;
             return;
         }
+        if (e.KeyModifiers.HasFlag(KeyModifiers.Shift))
+        {
+            if (clear || digit is not null) vm.ApplyDayHighlightShortcut(digit, clear);
+            e.Handled = clear || digit is not null;
+            return;
+        }
         if (digit is not null)
         {
             vm.SetRatingByNumber(digit.Value);

LehrerApp.Desktop/Views/Groups/SeatingPlanTabView.axaml

@@ -154,6 +154,9 @@
                           <TextBlock Text="{Binding HomeworkBadge}" Foreground="White" FontSize="10"
                                      ToolTip.Tip="Hausaufgabe"/>
                         </Border>
+                        <TextBlock Text="{Binding DayHighlightBadge}" FontSize="14"
+                                   IsVisible="{Binding HasDayHighlightBadge}"
+                                   ToolTip.Tip="Tagesflagge"/>
                       </StackPanel>
                       <!-- Strichliste Meldungen (Nutzer-Feedback): schnelles Mitzählen ohne den
                            vollen Bewertungsdialog zu öffnen -->

LehrerApp.Desktop/Views/Groups/StudentPerformanceOverviewDialog.axaml

@@ -0,0 +1,184 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="clr-namespace:LehrerApp.Desktop.ViewModels.Groups"
+        xmlns:students="clr-namespace:LehrerApp.Desktop.ViewModels.Students"
+        x:Class="LehrerApp.Desktop.Views.Groups.StudentPerformanceOverviewDialog"
+        x:DataType="vm:StudentPerformanceOverviewViewModel"
+        Title="Leistungsüberblick"
+        Width="920" Height="720" MinWidth="700" MinHeight="520"
+        CanResize="True" WindowStartupLocation="CenterOwner">
+
+  <Grid RowDefinitions="Auto,Auto,*,Auto" Margin="24">
+
+    <Grid Grid.Row="0" ColumnDefinitions="*,Auto">
+      <StackPanel Grid.Column="0" Spacing="2">
+        <TextBlock Text="{Binding StudentName}" Classes="dialogtitle"/>
+        <TextBlock Text="{Binding GroupLabel}" FontSize="12" Opacity="0.6"/>
+      </StackPanel>
+      <Button Grid.Column="1" Content="{Binding ModeButtonLabel}"
+              Command="{Binding ToggleModeCommand}" VerticalAlignment="Top"
+              ToolTip.Tip="Zwischen Bewerter- und Schülermodus umschalten"/>
+    </Grid>
+
+    <StackPanel Grid.Row="1" Orientation="Horizontal" Spacing="12" Margin="0,12,0,10">
+      <StackPanel Orientation="Horizontal" Spacing="6">
+        <TextBlock Text="Zeitraum:" VerticalAlignment="Center"/>
+        <ComboBox ItemsSource="{Binding PeriodOptions}" SelectedItem="{Binding SelectedPeriod}" MinWidth="170"/>
+      </StackPanel>
+      <TextBlock Text="{Binding SchemeSummary}" FontSize="12" Opacity="0.6" VerticalAlignment="Center"
+                 IsVisible="{Binding IsTeacherMode}"/>
+    </StackPanel>
+
+    <ScrollViewer Grid.Row="2">
+      <Grid ColumnDefinitions="*,300">
+        <StackPanel Grid.Column="0" Spacing="18" Margin="0,0,16,0">
+
+          <StackPanel Spacing="6">
+            <Grid ColumnDefinitions="*,Auto">
+              <TextBlock Grid.Column="0" Text="KLAUSUREN" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+              <TextBlock Grid.Column="1" Text="{Binding ExamsAverageDisplay, StringFormat='Ø {0}'}"
+                         FontSize="12" Opacity="0.7" IsVisible="{Binding ExamsAverageDisplay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </Grid>
+            <ItemsControl ItemsSource="{Binding ExamRows}">
+              <ItemsControl.ItemTemplate>
+                <DataTemplate x:DataType="vm:StudentExamRow">
+                  <Grid ColumnDefinitions="Auto,*,80,80" Margin="0,4">
+                    <TextBlock Grid.Column="0" Text="{Binding DateDisplay}" FontSize="12" Opacity="0.6" Width="80"/>
+                    <TextBlock Grid.Column="1" Text="{Binding Title}" FontSize="13"/>
+                    <TextBlock Grid.Column="2" Text="{Binding OwnGradeDisplay}" FontWeight="SemiBold"
+                               HorizontalAlignment="Right"/>
+                    <TextBlock Grid.Column="3" Text="{Binding ClassAverageDisplay}" Opacity="0.55"
+                               HorizontalAlignment="Right"
+                               IsVisible="{Binding $parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"
+                               ToolTip.Tip="Kursdurchschnitt dieser Klausur"/>
+                  </Grid>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <TextBlock Text="Keine Klausuren im gewählten Zeitraum." Classes="emptyhint"
+                       IsVisible="{Binding !ExamRows.Count}"/>
+
+            <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled"
+                          IsVisible="{Binding !!ExamHistory.Points.Count}">
+              <ItemsControl ItemsSource="{Binding ExamHistory.Points}">
+                <ItemsControl.ItemsPanel>
+                  <ItemsPanelTemplate><StackPanel Orientation="Horizontal" Spacing="10"/></ItemsPanelTemplate>
+                </ItemsControl.ItemsPanel>
+                <ItemsControl.ItemTemplate>
+                  <DataTemplate x:DataType="students:GradeHistoryPoint">
+                    <StackPanel Width="46" VerticalAlignment="Bottom" ToolTip.Tip="{Binding TooltipText}">
+                      <Border Classes="historybar" Height="{Binding BarHeight}" Width="16" CornerRadius="2"
+                              HorizontalAlignment="Center" VerticalAlignment="Bottom"
+                              Classes.warning="{Binding IsWarning}"/>
+                      <TextBlock Text="{Binding Value}" FontSize="11" FontWeight="SemiBold"
+                                 HorizontalAlignment="Center" Margin="0,3,0,0"/>
+                      <TextBlock Text="{Binding DateDisplay}" FontSize="9" Opacity="0.5"
+                                 HorizontalAlignment="Center"/>
+                    </StackPanel>
+                  </DataTemplate>
+                </ItemsControl.ItemTemplate>
+                <ItemsControl.Styles>
+                  <Style Selector="Border.historybar">
+                    <Setter Property="Background" Value="{DynamicResource SystemControlBackgroundAccentBrush}"/>
+                  </Style>
+                  <Style Selector="Border.historybar.warning">
+                    <Setter Property="Background" Value="#E53935"/>
+                  </Style>
+                </ItemsControl.Styles>
+              </ItemsControl>
+            </ScrollViewer>
+          </StackPanel>
+
+          <StackPanel Spacing="6">
+            <Grid ColumnDefinitions="*,Auto">
+              <TextBlock Grid.Column="0" Text="MITARBEIT" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+              <TextBlock Grid.Column="1" Text="{Binding ParticipationAverageDisplay, StringFormat='Ø {0}'}"
+                         FontSize="12" Opacity="0.7" IsVisible="{Binding ParticipationAverageDisplay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </Grid>
+            <ItemsControl ItemsSource="{Binding ParticipationRows}">
+              <ItemsControl.ItemTemplate>
+                <DataTemplate x:DataType="vm:StudentSimpleGradeRow">
+                  <Grid ColumnDefinitions="Auto,*,70,Auto" Margin="0,4">
+                    <TextBlock Grid.Column="0" Text="{Binding DateDisplay}" FontSize="12" Opacity="0.6" Width="80"/>
+                    <TextBlock Grid.Column="1" Text="{Binding CategoryLabel}" FontSize="13"/>
+                    <TextBox Grid.Column="2" Text="{Binding Value}"
+                             IsVisible="{Binding $parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"/>
+                    <TextBlock Grid.Column="2" Text="{Binding Value}" FontWeight="SemiBold" HorizontalAlignment="Right"
+                               IsVisible="{Binding !$parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"/>
+                    <Button Grid.Column="3" Content="Speichern" Command="{Binding SaveCommand}" FontSize="11" Padding="8,3" Margin="6,0,0,0"
+                            IsVisible="{Binding $parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"/>
+                  </Grid>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <TextBlock Text="Keine Mitarbeitsnote im gewählten Zeitraum." Classes="emptyhint"
+                       IsVisible="{Binding !ParticipationRows.Count}"/>
+          </StackPanel>
+
+          <StackPanel Spacing="6">
+            <Grid ColumnDefinitions="*,Auto">
+              <TextBlock Grid.Column="0" Text="SONSTIGE" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+              <TextBlock Grid.Column="1" Text="{Binding OtherAverageDisplay, StringFormat='Ø {0}'}"
+                         FontSize="12" Opacity="0.7" IsVisible="{Binding OtherAverageDisplay, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </Grid>
+            <ItemsControl ItemsSource="{Binding OtherRows}">
+              <ItemsControl.ItemTemplate>
+                <DataTemplate x:DataType="vm:StudentSimpleGradeRow">
+                  <Grid ColumnDefinitions="Auto,*,70,Auto" Margin="0,4">
+                    <TextBlock Grid.Column="0" Text="{Binding DateDisplay}" FontSize="12" Opacity="0.6" Width="80"/>
+                    <TextBlock Grid.Column="1" Text="{Binding CategoryLabel}" FontSize="13"/>
+                    <TextBox Grid.Column="2" Text="{Binding Value}"
+                             IsVisible="{Binding $parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"/>
+                    <TextBlock Grid.Column="2" Text="{Binding Value}" FontWeight="SemiBold" HorizontalAlignment="Right"
+                               IsVisible="{Binding !$parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"/>
+                    <Button Grid.Column="3" Content="Speichern" Command="{Binding SaveCommand}" FontSize="11" Padding="8,3" Margin="6,0,0,0"
+                            IsVisible="{Binding $parent[ItemsControl].((vm:StudentPerformanceOverviewViewModel)DataContext).IsTeacherMode}"/>
+                  </Grid>
+                </DataTemplate>
+              </ItemsControl.ItemTemplate>
+            </ItemsControl>
+            <TextBlock Text="Keine sonstigen Noten im gewählten Zeitraum." Classes="emptyhint"
+                       IsVisible="{Binding !OtherRows.Count}"/>
+          </StackPanel>
+
+          <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}" CornerRadius="8" Padding="14">
+            <StackPanel Spacing="2">
+              <TextBlock Text="ZEUGNISNOTE (BERECHNET)" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+              <TextBlock Text="{Binding CurrentReportGradeDisplay}" FontSize="18" FontWeight="SemiBold"/>
+            </StackPanel>
+          </Border>
+        </StackPanel>
+
+        <StackPanel Grid.Column="1" Spacing="16">
+          <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}" CornerRadius="8" Padding="14">
+            <StackPanel Spacing="8">
+              <TextBlock Text="ZIELNOTE: WAS BRAUCHE ICH NOCH?" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+              <StackPanel Orientation="Horizontal" Spacing="6">
+                <TextBlock Text="Ziel:" VerticalAlignment="Center"/>
+                <TextBox Text="{Binding TargetGradeText}" Width="70" PlaceholderText="z.B. 2"/>
+                <TextBlock Text="in" VerticalAlignment="Center"/>
+                <ComboBox ItemsSource="{Binding TargetBucketOptions}" SelectedItem="{Binding TargetBucketName}" MinWidth="110"/>
+              </StackPanel>
+              <TextBlock Text="{Binding TargetResultDisplay}" TextWrapping="Wrap" FontSize="13"/>
+            </StackPanel>
+          </Border>
+
+          <Border Background="{DynamicResource SystemControlBackgroundAltHighBrush}" CornerRadius="8" Padding="14">
+            <StackPanel Spacing="8">
+              <TextBlock Text="WAS-WÄRE-WENN" FontSize="11" FontWeight="Bold" Opacity="0.5"/>
+              <StackPanel Orientation="Horizontal" Spacing="6">
+                <TextBlock Text="Zusätzliche Klausurnote:" VerticalAlignment="Center" TextWrapping="Wrap"/>
+                <TextBox Text="{Binding WhatIfExamGradeText}" Width="70" PlaceholderText="z.B. 3"/>
+              </StackPanel>
+              <TextBlock Text="{Binding WhatIfResultDisplay}" TextWrapping="Wrap" FontSize="13"/>
+            </StackPanel>
+          </Border>
+        </StackPanel>
+      </Grid>
+    </ScrollViewer>
+
+    <Grid Grid.Row="3" ColumnDefinitions="*,Auto" Margin="0,16,0,0">
+      <Button Grid.Column="1" Content="Schließen" Click="OnClose"/>
+    </Grid>
+  </Grid>
+</Window>

LehrerApp.Desktop/Views/Groups/StudentPerformanceOverviewDialog.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace LehrerApp.Desktop.Views.Groups;
+
+public partial class StudentPerformanceOverviewDialog : Window
+{
+    public StudentPerformanceOverviewDialog() => InitializeComponent();
+
+    private void OnClose(object? sender, RoutedEventArgs e) => Close();
+}