docker

docker-compose.yml

@@ -28,9 +28,14 @@ services:
       - DB_PROVIDER=PostgreSQL
       - ConnectionStrings__DefaultConnection=Host=db;Database=timetracker;Username=timetracker_user;Password=SecretPassword123;
       - EnableHttpsRedirect=false
+      - TenantSettings__BaseDomain=timetracker.marc-wieland.de
+    volumes:
+      - dpkeys:/home/app/.aspnet/DataProtection-Keys
     depends_on:
       - db
 
 volumes:
   pgdata:
     name: timetracker_pgdata
+  dpkeys:
+    name: timetracker_dpkeys

timetracker.Client/Components/Pages/Changelog.razor

@@ -65,6 +65,9 @@
             new("Neu",     "Userprofil angelegt"),
             new("Upgrade",     "Früheste Gehenszeit wird angezeigt"),
             new("Upgrade", "Pausen werden dynamisch berechnet"),
+            new("Neu", "Excel-Export"),
+            new("Neu", "Multi-Tenant Integration"),
+            new("Upgrade", "Verbesserte Single-User Ansicht")
         ], Highlighted: true),
         new("1.4", "08.06.2026", true,
         [

timetracker.Client/Components/Pages/Home.razor

@@ -6,6 +6,7 @@
 @inject ISnackbar Snackbar
 @inject AuthenticationStateProvider AuthStateProvider
 @inject IJSRuntime JSRuntime
+@inject NavigationManager NavigationManager
 
 <PageTitle>KW @_kw – Wochenübersicht – Timetracker</PageTitle>
 
@@ -34,6 +35,10 @@ else
                     </MudText>
                 </MudStack>
                 <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="0">
+                    <MudTooltip Text="Woche als Excel exportieren">
+                        <MudIconButton Icon="@Icons.Material.Filled.Download"
+                                       Style="color: var(--mud-palette-primary-text)" OnClick="ExportWeekExcel" />
+                    </MudTooltip>
                     @if (!IsCurrentWeek)
                     {
                         <MudButton Variant="Variant.Text" Style="color: var(--mud-palette-primary-text)"
@@ -491,6 +496,10 @@ else
     private async Task PrevWeek() { _monday = _monday.AddDays(-7); await LoadWeek(); }
     private async Task NextWeek() { _monday = _monday.AddDays(7); await LoadWeek(); }
     private async Task GoToCurrentWeek() { _monday = GetMonday(DateOnly.FromDateTime(DateTime.Today)); await LoadWeek(); }
+    private void ExportWeekExcel()
+    {
+        NavigationManager.NavigateTo($"api/tracker/export/week?monday={_monday:yyyy-MM-dd}", forceLoad: true);
+    }
 
     private static DateOnly GetMonday(DateOnly date)
     {

timetracker.Client/Components/Pages/Month.razor

@@ -4,6 +4,7 @@
 @inject ITimetrackerService TrackerService
 @inject IHolidayService HolidayService
 @inject AuthenticationStateProvider AuthStateProvider
+@inject NavigationManager NavigationManager
 
 <PageTitle>@_deCulture.DateTimeFormat.GetMonthName(_month) @_year – Monatsübersicht – Timetracker</PageTitle>
 
@@ -32,6 +33,10 @@ else
                     </MudText>
                 </MudStack>
                 <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="0">
+                    <MudTooltip Text="Monat als Excel exportieren">
+                        <MudIconButton Icon="@Icons.Material.Filled.Download"
+                                       Style="color: var(--mud-palette-primary-text)" OnClick="ExportMonthExcel" />
+                    </MudTooltip>
                     @if (!IsCurrentMonth)
                     {
                         <MudButton Variant="Variant.Text" Style="color: var(--mud-palette-primary-text)"
@@ -268,6 +273,11 @@ else
         await LoadMonth();
     }
 
+    private void ExportMonthExcel()
+    {
+        NavigationManager.NavigateTo($"api/tracker/export/month?year={_year}&month={_month}", forceLoad: true);
+    }
+
     private static string FormatTs(TimeSpan ts, bool sign = false)
     {
         var neg = ts < TimeSpan.Zero;

timetracker.Client/Components/Pages/Stats.razor

@@ -3,6 +3,7 @@
 @attribute [Authorize]
 @inject ITimetrackerService TrackerService
 @inject AuthenticationStateProvider AuthStateProvider
+@inject NavigationManager NavigationManager
 @using System.Security.Claims
 @using timetracker.Shared
 
@@ -211,6 +212,75 @@ else
                 </MudCard>
             </MudItem>
 
+            @* ── Excel Export ── *@
+            <MudItem xs="12">
+                <MudCard Elevation="3" Class="rounded-xl">
+                    <MudCardHeader>
+                        <CardHeaderContent>
+                            <MudText Typo="Typo.h6" Style="font-weight:700; color: var(--mud-palette-text-primary)">Excel-Datenexport</MudText>
+                            <MudText Typo="Typo.caption" Color="Color.Secondary">Lade deine erfassten Arbeitszeiten in verschiedenen Zeiträumen als formatierte Excel-Datei herunter.</MudText>
+                        </CardHeaderContent>
+                    </MudCardHeader>
+                    <MudCardContent>
+                        <MudGrid Spacing="3">
+                            @* Wochenexport *@
+                            <MudItem xs="12" sm="4">
+                                <MudStack Spacing="3">
+                                    <MudText Typo="Typo.subtitle2" Style="font-weight:700">Wochenexport</MudText>
+                                    <MudDatePicker Label="Woche wählen" @bind-Date="_exportWeekDate" PickerVariant="PickerVariant.Dialog" Variant="Variant.Outlined" Color="Color.Primary" />
+                                    <MudButton StartIcon="@Icons.Material.Filled.Download" Variant="Variant.Filled" Color="Color.Primary" OnClick="ExportWeek" FullWidth="true">
+                                        Woche exportieren
+                                    </MudButton>
+                                </MudStack>
+                            </MudItem>
+
+                            @* Monatsexport *@
+                            <MudItem xs="12" sm="4">
+                                <MudStack Spacing="3">
+                                    <MudText Typo="Typo.subtitle2" Style="font-weight:700">Monatsexport</MudText>
+                                    <MudStack Row="true" Spacing="2">
+                                        <MudSelect T="int" Label="Monat" @bind-Value="_exportMonth" Variant="Variant.Outlined">
+                                            @for (int m = 1; m <= 12; m++)
+                                            {
+                                                var monthVal = m;
+                                                <MudSelectItem Value="@monthVal">@_deCulture.DateTimeFormat.GetMonthName(monthVal)</MudSelectItem>
+                                            }
+                                        </MudSelect>
+                                        <MudSelect T="int" Label="Jahr" @bind-Value="_exportMonthYear" Variant="Variant.Outlined">
+                                            @for (int y = DateTime.Today.Year - 5; y <= DateTime.Today.Year + 1; y++)
+                                            {
+                                                var yearVal = y;
+                                                <MudSelectItem Value="@yearVal">@yearVal</MudSelectItem>
+                                            }
+                                        </MudSelect>
+                                    </MudStack>
+                                    <MudButton StartIcon="@Icons.Material.Filled.Download" Variant="Variant.Filled" Color="Color.Primary" OnClick="ExportMonth" FullWidth="true">
+                                        Monat exportieren
+                                    </MudButton>
+                                </MudStack>
+                            </MudItem>
+
+                            @* Jahresexport *@
+                            <MudItem xs="12" sm="4">
+                                <MudStack Spacing="3">
+                                    <MudText Typo="Typo.subtitle2" Style="font-weight:700">Jahresexport</MudText>
+                                    <MudSelect T="int" Label="Jahr" @bind-Value="_exportYear" Variant="Variant.Outlined">
+                                        @for (int y = DateTime.Today.Year - 5; y <= DateTime.Today.Year + 1; y++)
+                                        {
+                                            var yearVal = y;
+                                            <MudSelectItem Value="@yearVal">@yearVal</MudSelectItem>
+                                        }
+                                    </MudSelect>
+                                    <MudButton StartIcon="@Icons.Material.Filled.Download" Variant="Variant.Filled" Color="Color.Primary" OnClick="ExportYear" FullWidth="true">
+                                        Jahr exportieren
+                                    </MudButton>
+                                </MudStack>
+                            </MudItem>
+                        </MudGrid>
+                    </MudCardContent>
+                </MudCard>
+            </MudItem>
+            
             @* ── Diagnostics Panel ── *@
             <MudItem xs="12">
                 <MudExpansionPanels>
@@ -264,6 +334,12 @@ else
     private double _weekOvertimeHours;
     private double _maxHoursValue = 10.0;
 
+    // Excel Export variables
+    private DateTime? _exportWeekDate = DateTime.Today;
+    private int _exportMonth = DateTime.Today.Month;
+    private int _exportMonthYear = DateTime.Today.Year;
+    private int _exportYear = DateTime.Today.Year;
+    
     // Debug variables
     private int _rawDbDaysCount = 0;
     private Dictionary<DateOnly, string> _dbMatchStatus = new();
@@ -373,6 +449,25 @@ else
         return $"{prefix}{(int)abs.TotalHours}:{abs.Minutes:D2}";
     }
 
+    private void ExportWeek()
+    {
+        if (_exportWeekDate.HasValue)
+        {
+            var date = DateOnly.FromDateTime(_exportWeekDate.Value);
+            NavigationManager.NavigateTo($"api/tracker/export/week?monday={date:yyyy-MM-dd}", forceLoad: true);
+        }
+    }
+
+    private void ExportMonth()
+    {
+        NavigationManager.NavigateTo($"api/tracker/export/month?year={_exportMonthYear}&month={_exportMonth}", forceLoad: true);
+    }
+
+    private void ExportYear()
+    {
+        NavigationManager.NavigateTo($"api/tracker/export/year?year={_exportYear}", forceLoad: true);
+    }
+
     private sealed class DayStat
     {
         public DateOnly Date { get; set; }

timetracker.Server/Data/ExcelExporter.cs

@@ -0,0 +1,278 @@
+using ClosedXML.Excel;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using timetracker.Shared;
+
+namespace timetracker.Data;
+
+public static class ExcelExporter
+{
+    public static async Task<byte[]> GenerateExcelExportAsync(
+        int userId,
+        DateOnly startDate,
+        DateOnly endDate,
+        string title,
+        ITimetrackerService trackerService,
+        TimetrackerDbContext db)
+    {
+        var settings = await trackerService.GetSettingsAsync(userId);
+
+        var workDays = await db.WorkDays
+            .Include(w => w.Breaks)
+            .Where(w => w.UserId == userId && w.Date >= startDate && w.Date <= endDate)
+            .ToDictionaryAsync(w => w.Date);
+
+        var holidaysList = await db.PublicHolidays
+            .Where(h => h.Date >= startDate && h.Date <= endDate)
+            .ToListAsync();
+
+        var state = settings.GermanState;
+        var holidayMap = holidaysList
+            .Where(h => string.IsNullOrEmpty(h.Counties) || (!string.IsNullOrEmpty(state) && h.Counties.Split(',').Contains(state)))
+            .ToDictionary(h => h.Date, h => h.Name);
+
+        var vacationMap = await db.VacationDays
+            .Where(v => v.UserId == userId && v.Date >= startDate && v.Date <= endDate)
+            .ToDictionaryAsync(v => v.Date, v => v.Note ?? "Urlaub");
+
+        var user = await db.Users.FindAsync(userId);
+        var userName = user != null ? user.Username : "Mitarbeiter";
+
+        var rows = new List<ExportRow>();
+
+        for (var date = startDate; date <= endDate; date = date.AddDays(1))
+        {
+            bool isWorkDay = settings.IsWorkDay(date.DayOfWeek);
+            bool isHoliday = holidayMap.ContainsKey(date);
+            bool isVacation = vacationMap.ContainsKey(date);
+
+            double targetHours = (isWorkDay && !isHoliday && !isVacation) ? settings.DailyTargetHours : 0.0;
+
+            string status = "Wochenende";
+            if (isHoliday) status = "Feiertag";
+            else if (isVacation) status = "Urlaub";
+            else if (isWorkDay) status = "Arbeitstag";
+
+            TimeSpan? startTime = null;
+            TimeSpan? endTime = null;
+            TimeSpan breakTime = TimeSpan.Zero;
+            double actualHours = 0.0;
+
+            string note = "";
+            if (isHoliday) note = holidayMap[date];
+            else if (isVacation) note = vacationMap[date];
+
+            if (workDays.TryGetValue(date, out var wd))
+            {
+                if (wd.StartTime.HasValue) startTime = wd.StartTime.Value.ToTimeSpan();
+                if (wd.EndTime.HasValue) endTime = wd.EndTime.Value.ToTimeSpan();
+
+                if (startTime.HasValue && endTime.HasValue)
+                {
+                    var gross = endTime.Value - startTime.Value;
+                    if (gross > TimeSpan.Zero)
+                    {
+                        var breakTotal = wd.Breaks
+                            .Where(b => b.StartTime.HasValue && b.EndTime.HasValue && b.EndTime > b.StartTime)
+                            .Aggregate(TimeSpan.Zero, (s, b) =>
+                                s + (b.EndTime!.Value.ToTimeSpan() - b.StartTime!.Value.ToTimeSpan()));
+
+                        var minMinutes = gross.TotalHours >= 9.0 ? 45 : 30;
+                        var minBreak = TimeSpan.FromMinutes(Math.Max(minMinutes, settings.MinimumBreakMinutes));
+                        var finalBreak = breakTotal > minBreak ? breakTotal : minBreak;
+
+                        breakTime = finalBreak;
+                        actualHours = (gross - finalBreak).TotalHours;
+                        if (actualHours < 0) actualHours = 0.0;
+                    }
+                }
+            }
+
+            rows.Add(new ExportRow
+            {
+                Date = date,
+                Status = status,
+                StartTime = startTime,
+                EndTime = endTime,
+                BreakTime = breakTime,
+                ActualHours = actualHours,
+                TargetHours = targetHours,
+                DiffHours = actualHours - targetHours,
+                Note = note
+            });
+        }
+
+        return ExportToExcel(title, userName, startDate, endDate, rows);
+    }
+
+    public static byte[] ExportToExcel(
+        string title,
+        string userName,
+        DateOnly startDate,
+        DateOnly endDate,
+        List<ExportRow> rows)
+    {
+        using var workbook = new XLWorkbook();
+        var worksheet = workbook.Worksheets.Add("Arbeitszeiten");
+
+        // Gitterlinien explizit einblenden
+        worksheet.ShowGridLines = true;
+
+        // Title Block
+        worksheet.Cell("A1").Value = title;
+        worksheet.Cell("A1").Style.Font.Bold = true;
+        worksheet.Cell("A1").Style.Font.FontSize = 16;
+        worksheet.Cell("A1").Style.Font.FontColor = XLColor.FromHtml("#0F172A"); // Slate 900
+
+        // Info Block
+        worksheet.Cell("A2").Value = $"Mitarbeiter: {userName}";
+        worksheet.Cell("A2").Style.Font.FontSize = 11;
+        worksheet.Cell("A2").Style.Font.Italic = true;
+
+        worksheet.Cell("A3").Value = $"Zeitraum: {startDate:dd.MM.yyyy} bis {endDate:dd.MM.yyyy}";
+        worksheet.Cell("A3").Style.Font.FontSize = 11;
+        worksheet.Cell("A3").Style.Font.Italic = true;
+
+        // Tabellenüberschriften (Zeile 5)
+        string[] headers = {
+            "Datum", "Wochentag", "Status", "Beginn", "Ende",
+            "Pause", "Netto (Ist)", "Soll-Stunden", "Differenz (Gleitzeit)", "Notiz / Feiertag / Urlaub"
+        };
+
+        for (int i = 0; i < headers.Length; i++)
+        {
+            var cell = worksheet.Cell(5, i + 1);
+            cell.Value = headers[i];
+            cell.Style.Font.Bold = true;
+            cell.Style.Font.FontColor = XLColor.White;
+            cell.Style.Fill.BackgroundColor = XLColor.FromHtml("#0EA5E9"); // Primary color (Sky 500)
+            cell.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
+        }
+
+        // Datenzeilen
+        int currentRow = 6;
+        var deCulture = new CultureInfo("de-DE");
+        foreach (var r in rows)
+        {
+            worksheet.Cell(currentRow, 1).Value = r.Date.ToString("dd.MM.yyyy");
+            worksheet.Cell(currentRow, 2).Value = r.Date.ToString("dddd", deCulture);
+            worksheet.Cell(currentRow, 3).Value = r.Status;
+
+            if (r.StartTime.HasValue)
+            {
+                worksheet.Cell(currentRow, 4).Value = r.StartTime.Value.ToString(@"hh\:mm");
+            }
+            else
+            {
+                worksheet.Cell(currentRow, 4).Value = "—";
+            }
+
+            if (r.EndTime.HasValue)
+            {
+                worksheet.Cell(currentRow, 5).Value = r.EndTime.Value.ToString(@"hh\:mm");
+            }
+            else
+            {
+                worksheet.Cell(currentRow, 5).Value = "—";
+            }
+
+            worksheet.Cell(currentRow, 6).Value = r.BreakTime.TotalMinutes > 0 ? r.BreakTime.ToString(@"hh\:mm") : "—";
+
+            worksheet.Cell(currentRow, 7).Value = r.ActualHours;
+            worksheet.Cell(currentRow, 7).Style.NumberFormat.Format = "0.00";
+
+            worksheet.Cell(currentRow, 8).Value = r.TargetHours;
+            worksheet.Cell(currentRow, 8).Style.NumberFormat.Format = "0.00";
+
+            worksheet.Cell(currentRow, 9).Value = r.DiffHours;
+            worksheet.Cell(currentRow, 9).Style.NumberFormat.Format = "+0.00;-0.00;0.00";
+
+            if (r.DiffHours > 0)
+            {
+                worksheet.Cell(currentRow, 9).Style.Font.FontColor = XLColor.FromHtml("#16A34A"); // Green 600
+                worksheet.Cell(currentRow, 9).Style.Font.Bold = true;
+            }
+            else if (r.DiffHours < 0)
+            {
+                worksheet.Cell(currentRow, 9).Style.Font.FontColor = XLColor.FromHtml("#DC2626"); // Red 600
+                worksheet.Cell(currentRow, 9).Style.Font.Bold = true;
+            }
+
+            worksheet.Cell(currentRow, 10).Value = r.Note;
+
+            // Zebra-Streifen
+            if (currentRow % 2 == 0)
+            {
+                for (int col = 1; col <= headers.Length; col++)
+                {
+                    worksheet.Cell(currentRow, col).Style.Fill.BackgroundColor = XLColor.FromHtml("#F8FAFC"); // Slate 50
+                }
+            }
+
+            // Rahmenlinien
+            for (int col = 1; col <= headers.Length; col++)
+            {
+                worksheet.Cell(currentRow, col).Style.Border.BottomBorder = XLBorderStyleValues.Thin;
+                worksheet.Cell(currentRow, col).Style.Border.BottomBorderColor = XLColor.FromHtml("#E2E8F0");
+            }
+
+            currentRow++;
+        }
+
+        // Summenzeile
+        currentRow++;
+
+        worksheet.Cell(currentRow, 6).Value = "Gesamt:";
+        worksheet.Cell(currentRow, 6).Style.Font.Bold = true;
+        worksheet.Cell(currentRow, 6).Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Right;
+
+        var actualSumRange = $"G6:G{currentRow - 2}";
+        worksheet.Cell(currentRow, 7).FormulaA1 = $"SUM({actualSumRange})";
+        worksheet.Cell(currentRow, 7).Style.Font.Bold = true;
+        worksheet.Cell(currentRow, 7).Style.NumberFormat.Format = "0.00";
+
+        var targetSumRange = $"H6:H{currentRow - 2}";
+        worksheet.Cell(currentRow, 8).FormulaA1 = $"SUM({targetSumRange})";
+        worksheet.Cell(currentRow, 8).Style.Font.Bold = true;
+        worksheet.Cell(currentRow, 8).Style.NumberFormat.Format = "0.00";
+
+        var diffSumRange = $"I6:I{currentRow - 2}";
+        worksheet.Cell(currentRow, 9).FormulaA1 = $"SUM({diffSumRange})";
+        worksheet.Cell(currentRow, 9).Style.Font.Bold = true;
+        worksheet.Cell(currentRow, 9).Style.NumberFormat.Format = "+0.00;-0.00;0.00";
+
+        // Summenrahmen
+        for (int col = 6; col <= 9; col++)
+        {
+            worksheet.Cell(currentRow, col).Style.Border.TopBorder = XLBorderStyleValues.Thin;
+            worksheet.Cell(currentRow, col).Style.Border.TopBorderColor = XLColor.Black;
+            worksheet.Cell(currentRow, col).Style.Border.BottomBorder = XLBorderStyleValues.Double;
+            worksheet.Cell(currentRow, col).Style.Border.BottomBorderColor = XLColor.Black;
+        }
+
+        // Spaltenbreiten automatisch anpassen
+        worksheet.Columns().AdjustToContents();
+
+        using var memoryStream = new MemoryStream();
+        workbook.SaveAs(memoryStream);
+        return memoryStream.ToArray();
+    }
+}
+
+public class ExportRow
+{
+    public DateOnly Date { get; set; }
+    public string Status { get; set; } = "";
+    public TimeSpan? StartTime { get; set; }
+    public TimeSpan? EndTime { get; set; }
+    public TimeSpan BreakTime { get; set; }
+    public double ActualHours { get; set; }
+    public double TargetHours { get; set; }
+    public double DiffHours { get; set; }
+    public string Note { get; set; } = "";
+}

timetracker.Server/Data/Migrations/20260624210436_AddTenantBranding.cs

@@ -1,4 +1,4 @@
-using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Migrations;
 
 #nullable disable
 
@@ -13,7 +13,6 @@ namespace timetracker.Data.Migrations
             migrationBuilder.AddColumn<bool>(
                 name: "IsTenantAdmin",
                 table: "Users",
-                type: "INTEGER",
                 nullable: false,
                 defaultValue: false);
 

timetracker.Server/Data/Migrations/20260625184756_PendingChanges.Designer.cs

@@ -0,0 +1,265 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using timetracker.Data;
+
+#nullable disable
+
+namespace timetracker.Data.Migrations
+{
+    [DbContext(typeof(TimetrackerDbContext))]
+    [Migration("20260625184756_PendingChanges")]
+    partial class PendingChanges
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "10.0.9");
+
+            modelBuilder.Entity("timetracker.Shared.AppSettings", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<double>("DailyTargetHours")
+                        .HasColumnType("REAL");
+
+                    b.Property<DateOnly?>("FlexTimeStartDate")
+                        .HasColumnType("TEXT");
+
+                    b.Property<double>("FlexTimeStartingBalanceHours")
+                        .HasColumnType("REAL");
+
+                    b.Property<string>("GermanState")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("MinimumBreakMinutes")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int?>("TenantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("VacationDaysPerYear")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkFriday")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkMonday")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkSaturday")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkSunday")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkThursday")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkTuesday")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("WorkWednesday")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("AppSettings");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.BreakEntry", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<TimeOnly?>("EndTime")
+                        .HasColumnType("TEXT");
+
+                    b.Property<TimeOnly?>("StartTime")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("WorkDayId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkDayId");
+
+                    b.ToTable("BreakEntries");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.PublicHoliday", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Counties")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("PublicHolidays");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.Tenant", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsApproved")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PrimaryColor")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("SecondaryColor")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Subdomain")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Subdomain")
+                        .IsUnique();
+
+                    b.ToTable("Tenants");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.User", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("IsTenantAdmin")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("PasswordHash")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PasswordSalt")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("TenantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TenantId");
+
+                    b.ToTable("Users");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.VacationDay", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Note")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("TenantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("VacationDays");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.WorkDay", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateOnly>("Date")
+                        .HasColumnType("TEXT");
+
+                    b.Property<TimeOnly?>("EndTime")
+                        .HasColumnType("TEXT");
+
+                    b.Property<TimeOnly?>("StartTime")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("TenantId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("UserId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("WorkDays");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.BreakEntry", b =>
+                {
+                    b.HasOne("timetracker.Shared.WorkDay", "WorkDay")
+                        .WithMany("Breaks")
+                        .HasForeignKey("WorkDayId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("WorkDay");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.User", b =>
+                {
+                    b.HasOne("timetracker.Shared.Tenant", "Tenant")
+                        .WithMany()
+                        .HasForeignKey("TenantId");
+
+                    b.Navigation("Tenant");
+                });
+
+            modelBuilder.Entity("timetracker.Shared.WorkDay", b =>
+                {
+                    b.Navigation("Breaks");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

timetracker.Server/Data/Migrations/20260625184756_PendingChanges.cs

@@ -0,0 +1,22 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace timetracker.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class PendingChanges : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+
+        }
+    }
+}

timetracker.Server/Data/Migrations/TimetrackerDbContextModelSnapshot.cs

@@ -15,7 +15,7 @@ namespace timetracker.Data.Migrations
         protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
-            modelBuilder.HasAnnotation("ProductVersion", "10.0.8");
+            modelBuilder.HasAnnotation("ProductVersion", "10.0.9");
 
             modelBuilder.Entity("timetracker.Shared.AppSettings", b =>
                 {

timetracker.Server/Data/TenantProvider.cs

@@ -37,7 +37,7 @@ public class TenantProvider : ITenantProvider
             }
 
             // Resolve and cache in HttpContext.Items
-            ResolveTenantAsync().GetAwaiter().GetResult();
+            ResolveTenant();
 
             if (httpContext.Items.TryGetValue("TenantId", out cachedId))
             {
@@ -48,27 +48,27 @@ public class TenantProvider : ITenantProvider
         }
     }
 
-    public async Task<Tenant?> GetCurrentTenantAsync()
+    public Task<Tenant?> GetCurrentTenantAsync()
     {
         var httpContext = _httpContextAccessor.HttpContext;
-        if (httpContext == null) return null;
+        if (httpContext == null) return Task.FromResult<Tenant?>(null);
 
         if (httpContext.Items.TryGetValue("CurrentTenant", out var cachedTenant))
         {
-            return (Tenant?)cachedTenant;
+            return Task.FromResult((Tenant?)cachedTenant);
         }
 
-        await ResolveTenantAsync();
+        ResolveTenant();
 
         if (httpContext.Items.TryGetValue("CurrentTenant", out cachedTenant))
         {
-            return (Tenant?)cachedTenant;
+            return Task.FromResult((Tenant?)cachedTenant);
         }
 
-        return null;
+        return Task.FromResult<Tenant?>(null);
     }
 
-    private async Task ResolveTenantAsync()
+    private void ResolveTenant()
     {
         var httpContext = _httpContextAccessor.HttpContext;
         if (httpContext == null) return;
@@ -82,9 +82,9 @@ public class TenantProvider : ITenantProvider
 
         if (!string.IsNullOrEmpty(subdomain))
         {
-            await using var db = await _dbContextFactory.CreateDbContextAsync();
+            using var db = _dbContextFactory.CreateDbContext();
-            var tenant = await db.Tenants
+            var tenant = db.Tenants
-                .FirstOrDefaultAsync(t => t.Subdomain.ToLower() == subdomain.ToLower());
+                .FirstOrDefault(t => t.Subdomain.ToLower() == subdomain.ToLower());
 
             if (tenant != null)
             {

timetracker.Server/Program.cs

@@ -114,14 +114,16 @@ if (dbProvider.Equals("PostgreSQL", StringComparison.OrdinalIgnoreCase))
     var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") 
         ?? builder.Configuration["ConnectionStrings:DefaultConnection"];
     builder.Services.AddDbContextFactory<TimetrackerDbContext>(options =>
-        options.UseNpgsql(connectionString));
+        options.UseNpgsql(connectionString)
+               .ConfigureWarnings(w => w.Ignore(Microsoft.EntityFrameworkCore.Diagnostics.RelationalEventId.PendingModelChangesWarning)));
 }
 else
 {
     var dbPath = Environment.GetEnvironmentVariable("TIMETRACKER_DB_PATH")
         ?? Path.Combine(builder.Environment.ContentRootPath, "timetracker.db");
     builder.Services.AddDbContextFactory<TimetrackerDbContext>(options =>
-        options.UseSqlite($"Data Source={dbPath}"));
+        options.UseSqlite($"Data Source={dbPath}")
+               .ConfigureWarnings(w => w.Ignore(Microsoft.EntityFrameworkCore.Diagnostics.RelationalEventId.PendingModelChangesWarning)));
 }
 
 var app = builder.Build();
@@ -131,13 +133,149 @@ using (var scope = app.Services.CreateScope())
 {
     var factory = scope.ServiceProvider.GetRequiredService<IDbContextFactory<TimetrackerDbContext>>();
     await using var db = await factory.CreateDbContextAsync();
+    
     if (dbProvider.Equals("PostgreSQL", StringComparison.OrdinalIgnoreCase))
     {
-        await db.Database.EnsureCreatedAsync();
+        try
+        {
+            var conn = db.Database.GetDbConnection();
+            if (conn.State != System.Data.ConnectionState.Open)
+            {
+                await conn.OpenAsync();
+            }
+
+            // Check if AppSettings table already exists
+            using (var cmdCheck = conn.CreateCommand())
+            {
+                cmdCheck.CommandText = "SELECT EXISTS (SELECT FROM pg_tables WHERE schemaname = 'public' AND tablename = 'AppSettings');";
+                var appSettingsExists = (bool)(await cmdCheck.ExecuteScalarAsync() ?? false);
+
+                if (appSettingsExists)
+                {
+                    // Ensure __EFMigrationsHistory table exists
+                    using (var cmdCreateHistory = conn.CreateCommand())
+                    {
+                        cmdCreateHistory.CommandText = @"
+                            CREATE TABLE IF NOT EXISTS ""__EFMigrationsHistory"" (
+                                ""MigrationId"" character varying(150) NOT NULL,
+                                ""ProductVersion"" character varying(32) NOT NULL,
+                                CONSTRAINT ""PK___EFMigrationsHistory"" PRIMARY KEY (""MigrationId"")
+                            );";
+                        await cmdCreateHistory.ExecuteNonQueryAsync();
+                    }
+
+                    // Check if the initial migration is already recorded
+                    using (var cmdCheckHistory = conn.CreateCommand())
+                    {
+                        cmdCheckHistory.CommandText = @"SELECT COUNT(*) FROM ""__EFMigrationsHistory"" WHERE ""MigrationId"" = '20260520133634_Initial';";
+                        var historyCount = Convert.ToInt32(await cmdCheckHistory.ExecuteScalarAsync() ?? 0);
+
+                        if (historyCount == 0)
+                        {
+                            // Seed the history table with the migrations that were already created by EnsureCreated in older versions
+                            using (var cmdInsertHistory = conn.CreateCommand())
+                            {
+                                cmdInsertHistory.CommandText = @"
+                                    INSERT INTO ""__EFMigrationsHistory"" (""MigrationId"", ""ProductVersion"") VALUES
+                                    ('20260520133634_Initial', '10.0.9'),
+                                    ('20260520200000_AddPublicHolidays', '10.0.9'),
+                                    ('20260522081459_AddMultiUser', '10.0.9'),
+                                    ('20260607213215_AddFlexTimeAndHolidayState', '10.0.9');";
+                                await cmdInsertHistory.ExecuteNonQueryAsync();
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Fehler beim Vorbereiten der PostgreSQL Migrationshistorie: {ex.Message}");
+        }
     }
-    else
+
+    await db.Database.MigrateAsync();
+
+    if (dbProvider.Equals("PostgreSQL", StringComparison.OrdinalIgnoreCase))
     {
-        await db.Database.MigrateAsync();
+        try
+        {
+            var conn = db.Database.GetDbConnection();
+            if (conn.State != System.Data.ConnectionState.Open)
+            {
+                await conn.OpenAsync();
+            }
+
+            // Check if column IsTenantAdmin in Users table is of type integer
+            using (var cmdCheckType = conn.CreateCommand())
+            {
+                cmdCheckType.CommandText = @"
+                    SELECT data_type 
+                    FROM information_schema.columns 
+                    WHERE table_name = 'Users' AND column_name = 'IsTenantAdmin';";
+                var dataType = await cmdCheckType.ExecuteScalarAsync() as string;
+                if (dataType != null && dataType.Equals("integer", StringComparison.OrdinalIgnoreCase))
+                {
+                    // Alter the column type to boolean
+                    using (var cmdAlterType = conn.CreateCommand())
+                    {
+                        cmdAlterType.CommandText = @"
+                            ALTER TABLE ""Users"" 
+                            ALTER COLUMN ""IsTenantAdmin"" TYPE boolean 
+                            USING (""IsTenantAdmin"" <> 0);";
+                        await cmdAlterType.ExecuteNonQueryAsync();
+                    }
+                }
+            }
+
+            // Check if column IsApproved in Tenants table is of type integer
+            using (var cmdCheckApproved = conn.CreateCommand())
+            {
+                cmdCheckApproved.CommandText = @"
+                    SELECT data_type 
+                    FROM information_schema.columns 
+                    WHERE table_name = 'Tenants' AND column_name = 'IsApproved';";
+                var dataType = await cmdCheckApproved.ExecuteScalarAsync() as string;
+                if (dataType != null && dataType.Equals("integer", StringComparison.OrdinalIgnoreCase))
+                {
+                    // Alter the column type to boolean
+                    using (var cmdAlterApproved = conn.CreateCommand())
+                    {
+                        cmdAlterApproved.CommandText = @"
+                            ALTER TABLE ""Tenants"" 
+                            ALTER COLUMN ""IsApproved"" TYPE boolean 
+                            USING (""IsApproved"" <> 0);";
+                        await cmdAlterApproved.ExecuteNonQueryAsync();
+                    }
+                }
+            }
+
+            // Check if column CreatedAt in Tenants table is of type text or character varying
+            using (var cmdCheckCreatedAt = conn.CreateCommand())
+            {
+                cmdCheckCreatedAt.CommandText = @"
+                    SELECT data_type 
+                    FROM information_schema.columns 
+                    WHERE table_name = 'Tenants' AND column_name = 'CreatedAt';";
+                var dataType = await cmdCheckCreatedAt.ExecuteScalarAsync() as string;
+                if (dataType != null && (dataType.Equals("text", StringComparison.OrdinalIgnoreCase) || dataType.Equals("character varying", StringComparison.OrdinalIgnoreCase)))
+                {
+                    // Alter the column type to timestamp without time zone
+                    using (var cmdAlterCreatedAt = conn.CreateCommand())
+                    {
+                        cmdAlterCreatedAt.CommandText = @"
+                            ALTER TABLE ""Tenants"" 
+                            ALTER COLUMN ""CreatedAt"" TYPE timestamp without time zone 
+                            USING (""CreatedAt""::timestamp without time zone);";
+                        await cmdAlterCreatedAt.ExecuteNonQueryAsync();
+                    }
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Fehler beim Konvertieren der PostgreSQL-Spaltentypen (IsTenantAdmin/IsApproved/CreatedAt): {ex.Message}");
+        }
     }
 }
 
@@ -459,6 +597,83 @@ trackerApi.MapGet("/month", async (ClaimsPrincipal claimsPrincipal, [FromQuery]
     return Results.Ok(days);
 });
 
+trackerApi.MapGet("/export/week", async (ClaimsPrincipal claimsPrincipal, [FromQuery] string monday, ITimetrackerService trackerService, TimetrackerDbContext db) =>
+{
+    var idClaim = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+    if (!int.TryParse(idClaim, out var userId)) return Results.Unauthorized();
+
+    if (DateOnly.TryParse(monday, out var date))
+    {
+        var mondayDate = date;
+        int diff = ((int)mondayDate.DayOfWeek - (int)DayOfWeek.Monday + 7) % 7;
+        mondayDate = mondayDate.AddDays(-diff);
+        var sundayDate = mondayDate.AddDays(6);
+
+        var fileBytes = await ExcelExporter.GenerateExcelExportAsync(
+            userId,
+            mondayDate,
+            sundayDate,
+            $"Wochenbericht KW {System.Globalization.ISOWeek.GetWeekOfYear(new DateTime(mondayDate.Year, mondayDate.Month, mondayDate.Day))}",
+            trackerService,
+            db);
+
+        return Results.File(
+            fileBytes,
+            "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+            $"Wochenbericht_KW_{System.Globalization.ISOWeek.GetWeekOfYear(new DateTime(mondayDate.Year, mondayDate.Month, mondayDate.Day))}_{mondayDate:yyyyMMdd}.xlsx");
+    }
+    return Results.BadRequest("Ungültiges Datum.");
+});
+
+trackerApi.MapGet("/export/month", async (ClaimsPrincipal claimsPrincipal, [FromQuery] int year, [FromQuery] int month, ITimetrackerService trackerService, TimetrackerDbContext db) =>
+{
+    var idClaim = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+    if (!int.TryParse(idClaim, out var userId)) return Results.Unauthorized();
+
+    if (month < 1 || month > 12) return Results.BadRequest("Ungültiger Monat.");
+
+    var startDate = new DateOnly(year, month, 1);
+    var endDate = startDate.AddMonths(1).AddDays(-1);
+
+    var deCulture = new System.Globalization.CultureInfo("de-DE");
+    var monthName = deCulture.DateTimeFormat.GetMonthName(month);
+
+    var fileBytes = await ExcelExporter.GenerateExcelExportAsync(
+        userId,
+        startDate,
+        endDate,
+        $"Monatsbericht {monthName} {year}",
+        trackerService,
+        db);
+
+    return Results.File(
+        fileBytes,
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+        $"Monatsbericht_{monthName}_{year}.xlsx");
+});
+
+trackerApi.MapGet("/export/year", async (ClaimsPrincipal claimsPrincipal, [FromQuery] int year, ITimetrackerService trackerService, TimetrackerDbContext db) =>
+{
+    var idClaim = claimsPrincipal.FindFirst(ClaimTypes.NameIdentifier)?.Value;
+    if (!int.TryParse(idClaim, out var userId)) return Results.Unauthorized();
+
+    var startDate = new DateOnly(year, 1, 1);
+    var endDate = new DateOnly(year, 12, 31);
+
+    var fileBytes = await ExcelExporter.GenerateExcelExportAsync(
+        userId,
+        startDate,
+        endDate,
+        $"Jahresbericht {year}",
+        trackerService,
+        db);
+
+    return Results.File(
+        fileBytes,
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+        $"Jahresbericht_{year}.xlsx");
+});
+
 // ── Holiday-API-Endpoints (Protected) ─────────────────────────────────────────
 var holidaysApi = app.MapGroup("/api/holidays").RequireAuthorization();
 

timetracker.Server/timetracker.Server.csproj

@@ -8,11 +8,13 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="ClosedXML" Version="0.105.0" />
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="10.0.8" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="*" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.8" />
     <PackageReference Include="MudBlazor" Version="9.4.0" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.2" />
+    <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="3.0.3" />
   </ItemGroup>
 
   <ItemGroup>