Add "Technical Debt TODOs" section to AGENTS.md

Added a new section in AGENTS.md to document technical debt tasks.
Outlined three specific areas for improvement:
- Refactor `EnvelopeSenderPage.razor` to reduce complexity.
- Move sender dashboard logic to dedicated services/extensions.
- Keep `EnvelopeSenderPage.razor` focused on UI/state orchestration.

These changes aim to improve code modularity, maintainability, and
separation of concerns.

AGENTS.md

@@ -236,6 +236,12 @@ Manual testing workflow:
 3. Test sender login at `/sender/login`
 4. Test receiver flow at `/envelope/login/{envelopeKey}`
 
+## Technical Debt TODOs
+
+- Refactor `EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/EnvelopeSenderPage.razor` to reduce complexity.
+- Move sender dashboard business/status logic into dedicated services and extension methods (for example effective status resolution, tab classification, receiver signed/rejected detection, and grid-layout filter sanitation).
+- Keep `EnvelopeSenderPage.razor` focused on UI composition/state orchestration; avoid embedding heavy domain logic directly in the Razor component.
+
 ## Database
 
 **SQL Server** (DD_ECM)

EnvelopeGenerator.Server/EnvelopeGenerator.Server.Client/Services/AnnotationService.cs

@@ -26,4 +26,24 @@ public class AnnotationService(IHttpClientFactory httpClientFactory)
         var result = await response.Content.ReadFromJsonAsync<List<AnnotationDto>>(_jsonOptions, cancel);
         return result ?? [];
     }
+
+    public async Task RejectAsync(string envelopeKey, string? reason, CancellationToken cancel = default)
+    {
+        using var http = httpClientFactory.CreateClient("EnvelopeGenerator.Server");
+
+        var response = await http.PostAsJsonAsync(
+            $"/api/Annotation/reject/{Uri.EscapeDataString(envelopeKey)}",
+            reason,
+            _jsonOptions,
+            cancel);
+
+        if (!response.IsSuccessStatusCode)
+        {
+            var body = await response.Content.ReadAsStringAsync(cancel);
+            throw new HttpRequestException(
+                $"Failed to reject envelope {envelopeKey}: {(int)response.StatusCode} {response.StatusCode} - {body}",
+                null,
+                response.StatusCode);
+        }
+    }
 }

EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/EnvelopeSenderPage.razor

@@ -262,7 +262,7 @@
                                             var envelope = cellContext.DataItem as EnvelopeDto;
                                             if (envelope != null)
                                             {
-                                                var statusInfo = GetStatusInfo(envelope.Status);
+                                                var statusInfo = GetStatusInfo(GetEffectiveEnvelopeStatus(envelope));
                                                 <div class="status-badge status-badge--@statusInfo.CssClass">
                                                     <span class="status-dot status-dot--@statusInfo.DotColor"></span>
                                                     @statusInfo.Label
@@ -314,12 +314,20 @@
                                                 {
                                                     <div style="display: flex; align-items: center; gap: 1rem; padding: 0.5rem; background: white; border-radius: 6px; border: 1px solid #e5e7eb;">
                                                         @{
+                                                            var isRejected = IsReceiverRejected(envelope, receiver);
                                                             var isSigned = IsReceiverSigned(envelope, receiver);
                                                             var accessCode = receiver.AccessCode;
                                                             var hasAccessCode = !string.IsNullOrWhiteSpace(accessCode);
                                                         }
-                                                        <span class="receiver-badge receiver-badge--@(isSigned ? "signed" : "unsigned")" style="min-width: 100px;">
-                                                            @if (isSigned)
+                                                        <span class="receiver-badge receiver-badge--@(isRejected ? "unsigned" : (isSigned ? "signed" : "unsigned"))" style="min-width: 100px;">
+                                                            @if (isRejected)
+                                                            {
+                                                                <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" viewBox="0 0 16 16">
+                                                                    <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z" />
+                                                                </svg>
+                                                                <span>@GetStatusLabel(EnvelopeStatus.DocumentRejected)</span>
+                                                            }
+                                                            else if (isSigned)
                                                             {
                                                                 <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" viewBox="0 0 16 16">
                                                                     <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z" />
@@ -590,10 +598,11 @@
         {
             _allEnvelopes = await EnvelopeService.GetAsync() ?? [];
 
-            // Split into active and completed based on status
+            // Split into active and completed based on effective status
+            // (history-aware: rejected envelopes should not stay in active tab).
             var envelopes = _allEnvelopes.ToList();
-            _activeEnvelopes = envelopes.Where(e => ((EnvelopeStatus)e.Status).IsActive()).ToList();
-            _completedEnvelopes = envelopes.Where(e => ((EnvelopeStatus)e.Status).IsCompleted()).ToList();
+            _activeEnvelopes = envelopes.Where(e => GetEffectiveEnvelopeStatus(e).IsActive()).ToList();
+            _completedEnvelopes = envelopes.Where(e => GetEffectiveEnvelopeStatus(e).IsCompleted()).ToList();
         }
         catch (Exception ex)
         {
@@ -745,13 +754,13 @@
 
     bool IsEnvelopeSent(EnvelopeDto envelope)
     {
-        var status = (EnvelopeStatus)envelope.Status;
+        var status = GetEffectiveEnvelopeStatus(envelope);
         return status >= EnvelopeStatus.EnvelopeQueued;
     }
 
     bool IsEnvelopeEditable(EnvelopeDto envelope)
     {
-        var status = (EnvelopeStatus)envelope.Status;
+        var status = GetEffectiveEnvelopeStatus(envelope);
         return status is EnvelopeStatus.EnvelopeCreated or EnvelopeStatus.EnvelopeSaved;
     }
 
@@ -800,7 +809,7 @@
     IReadOnlyList<StatusFilterItem> GetStatusFilterItems(IEnumerable<EnvelopeDto>? source)
     {
         return (source ?? Enumerable.Empty<EnvelopeDto>())
-            .Select(x => x.Status)
+            .Select(GetEffectiveEnvelopeStatus)
             .Distinct()
             .OrderBy(x => x)
             .Select(x => new StatusFilterItem(x, GetStatusLabel(x)))
@@ -818,7 +827,7 @@
 
     bool IsReceiverSigned(EnvelopeDto envelope, EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver.EnvelopeReceiverDto receiver)
     {
-        var status = (EnvelopeStatus)envelope.Status;
+        var status = GetEffectiveEnvelopeStatus(envelope);
         if (status is EnvelopeStatus.EnvelopeCompletelySigned or EnvelopeStatus.MessageCompletionSent)
             return true;
 
@@ -841,6 +850,43 @@
         return false;
     }
 
+    bool IsReceiverRejected(EnvelopeDto envelope, EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver.EnvelopeReceiverDto receiver)
+    {
+        var status = GetEffectiveEnvelopeStatus(envelope);
+        var histories = envelope.Histories?.Where(h =>
+            h.Status is EnvelopeStatus.DocumentRejected or EnvelopeStatus.EnvelopeRejected).ToList() ?? [];
+
+        if (histories.Count == 0)
+            return false;
+
+        if (histories.Any(h => h.Receiver?.Id == receiver.ReceiverId))
+            return true;
+
+        var receiverEmail = receiver.Receiver?.EmailAddress;
+        if (!string.IsNullOrWhiteSpace(receiverEmail) &&
+            histories.Any(h => string.Equals(h.UserReference, receiverEmail, StringComparison.OrdinalIgnoreCase)))
+            return true;
+
+        if (!string.IsNullOrWhiteSpace(receiver.Name) &&
+            histories.Any(h => string.Equals(h.UserReference, receiver.Name, StringComparison.OrdinalIgnoreCase)))
+            return true;
+
+        return status == EnvelopeStatus.EnvelopeRejected && (envelope.EnvelopeReceivers?.Count() ?? 0) == 1;
+    }
+
+    EnvelopeStatus GetEffectiveEnvelopeStatus(EnvelopeDto envelope)
+    {
+        var rawStatus = envelope.Status;
+
+        if (rawStatus is EnvelopeStatus.EnvelopeRejected or EnvelopeStatus.EnvelopeWithdrawn)
+            return rawStatus;
+
+        var hasRejectedHistory = (envelope.Histories ?? Enumerable.Empty<HistoryDto>())
+            .Any(h => h.Status is EnvelopeStatus.DocumentRejected or EnvelopeStatus.EnvelopeRejected);
+
+        return hasRejectedHistory ? EnvelopeStatus.EnvelopeRejected : rawStatus;
+    }
+
     DateTime GetHistoryDate(HistoryDto history)
     {
         return history.ActionDate ?? history.AddedWhen;
@@ -983,13 +1029,18 @@
         // If cache is empty (LoadFromServerAsync failed), skip layout restore silently.
         var prefs = UserPreferencesService.GetCached();
         if (prefs is not null && prefs.GridLayouts.TryGetValue(CurrentGridKey, out var json))
-            e.Layout = JsonSerializer.Deserialize<GridPersistentLayout>(json);
+        {
+            var layout = JsonSerializer.Deserialize<GridPersistentLayout>(json);
+            SanitizeLayoutFilters(layout);
+            e.Layout = layout;
+        }
     }
 
     async Task OnGridLayoutAutoSaving(GridPersistentLayoutEventArgs e)
     {
         try
         {
+            SanitizeLayoutFilters(e.Layout);
             var json = JsonSerializer.Serialize(e.Layout);
             await UserPreferencesService.SaveGridLayoutAsync(CurrentGridKey, json);
         }
@@ -999,5 +1050,55 @@
         }
     }
 
+    // Keep column/order personalization, but never persist/restore data filters.
+    // Tab counters are based on tab datasets; persisted grid filters can hide rows and
+    // make the grid appear empty or incomplete.
+    static void SanitizeLayoutFilters(GridPersistentLayout? layout)
+    {
+        if (layout is null)
+            return;
+
+        ClearWritableProperty(layout, "FilterCriteria");
+        ClearWritableProperty(layout, "SearchText");
+
+        if (layout.Columns is not System.Collections.IEnumerable columns)
+            return;
+
+        foreach (var column in columns)
+        {
+            if (column is null)
+                continue;
+
+            ClearWritableProperty(column, "FilterCriteria");
+            ClearWritableProperty(column, "FilterValues");
+            ClearWritableProperty(column, "FilterValue");
+            ClearWritableProperty(column, "SearchText");
+        }
+    }
+
+    static void ClearWritableProperty(object target, string propertyName)
+    {
+        var prop = target.GetType()
+            .GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public)
+            .FirstOrDefault(p => p.Name == propertyName && p.GetIndexParameters().Length == 0);
+
+        if (prop is null || !prop.CanWrite)
+            return;
+
+        var propertyType = prop.PropertyType;
+        object? value;
+
+        if (!propertyType.IsValueType || Nullable.GetUnderlyingType(propertyType) is not null)
+        {
+            value = null;
+        }
+        else
+        {
+            value = Activator.CreateInstance(propertyType);
+        }
+
+        prop.SetValue(target, value);
+    }
+
     private sealed record StatusFilterItem(EnvelopeStatus Value, string Text);
 }

EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/ReceiverPage.razor

@@ -6,6 +6,7 @@
 @using EnvelopeGenerator.Server.Client.Models.Constants
 @using EnvelopeGenerator.Server.Client.Services
 @using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver
+@using EnvelopeGenerator.Domain.Constants
 @using Microsoft.JSInterop
 @using DevExpress.Blazor
 @using System.Drawing
@@ -16,6 +17,7 @@
 @inject EnvelopeGenerator.Server.Client.Services.AuthService AuthService
 @inject EnvelopeGenerator.Server.Services.EnvelopeReceiverAuthorizationService ReceiverAuthorizationService
 @inject EnvelopeGenerator.Server.Services.EnvelopeReceiverPageDataService PageDataService
+@inject AnnotationService AnnotationService
 @inject AppVersionService AppVersion
 @inject IMemoryCache MemoryCache
 @inject ILogger<ReceiverPage> Logger
@@ -125,6 +127,17 @@
                             <span class="pdf-toolbar__btn-text">Unterschreiben</span>
                         </button>
                     }
+
+                    <button class="pdf-toolbar__btn pdf-toolbar__btn--reject"
+                            @onclick="OpenRejectPopup"
+                            disabled="@_isRejectSubmitting"
+                            title="Ablehnen"
+                            style="flex-shrink: 0;">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                            <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z" />
+                        </svg>
+                        <span class="pdf-toolbar__btn-text">Ablehnen</span>
+                    </button>
                 </div>
             </div>
 
@@ -342,6 +355,75 @@
     </FooterContentTemplate>
 </DxPopup>
 
+@* Rejection Popup *@
+<DxPopup @bind-Visible="_rejectPopupVisible"
+         HeaderText="Dokument ablehnen"
+         Width="500px"
+         MaxWidth="95vw"
+         ShowFooter="true"
+         CloseOnOutsideClick="false"
+         ShowCloseButton="false"
+         CloseOnEscape="false">
+    <BodyContentTemplate>
+        <div style="display: flex; align-items: flex-start; gap: 0.9rem; padding: 0.2rem 0 0.8rem;">
+            <div style="flex-shrink: 0; width: 36px; height: 36px; border-radius: 999px; background: #fee2e2; color: #b91c1c; display: inline-flex; align-items: center; justify-content: center;">
+                <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" viewBox="0 0 16 16">
+                    <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z" />
+                </svg>
+            </div>
+            <div style="min-width: 0;">
+                <div style="font-size: 0.95rem; font-weight: 600; color: #1f2937; margin-bottom: 0.3rem;">
+                    Möchten Sie dieses Dokument wirklich ablehnen?
+                </div>
+                <div style="font-size: 0.84rem; color: #6b7280; line-height: 1.45;">
+                    Diese Aktion markiert den Umschlag als abgelehnt und informiert den Absender.
+                </div>
+            </div>
+        </div>
+
+        <div>
+            <label for="rp-reject-reason" class="form-label" style="font-size: 0.875rem; font-weight: 500; color: #495057;">
+                Grund <span style="color: #6c757d; font-weight: 400;">(optional)</span>
+            </label>
+            <textarea id="rp-reject-reason"
+                      class="form-control"
+                      rows="4"
+                      maxlength="1000"
+                      value="@_rejectReason"
+                      @oninput="args => _rejectReason = args.Value?.ToString() ?? string.Empty"
+                      placeholder="Grund der Ablehnung"
+                      style="border: 2px solid #e9ecef; border-radius: 8px; padding: 0.625rem; resize: vertical;"></textarea>
+        </div>
+
+        @if (!string.IsNullOrWhiteSpace(_rejectValidationMessage))
+        {
+            <div style="background: #fee2e2; border-left: 4px solid #dc2626; padding: 0.75rem 1rem; margin-top: 1rem; border-radius: 4px;">
+                <span style="color: #b91c1c; font-size: 0.875rem; font-weight: 500;">@_rejectValidationMessage</span>
+            </div>
+        }
+    </BodyContentTemplate>
+    <FooterContentTemplate>
+        <div class="d-flex gap-2 justify-content-end w-100" style="padding: 0.5rem 0;">
+            <button class="btn btn-outline-secondary"
+                    @onclick="CloseRejectPopup"
+                    disabled="@_isRejectSubmitting"
+                    style="border-radius: 6px; padding: 0.625rem 1.25rem; font-weight: 500;">
+                Zurück
+            </button>
+            <button class="btn btn-danger"
+                    @onclick="SubmitRejectAsync"
+                    disabled="@_isRejectSubmitting"
+                    style="border-radius: 6px; padding: 0.625rem 1.5rem; font-weight: 600;">
+                @if (_isRejectSubmitting)
+                {
+                    <span class="spinner-border spinner-border-sm me-1" role="status"></span>
+                }
+                Ablehnen
+            </button>
+        </div>
+    </FooterContentTemplate>
+</DxPopup>
+
 @code {
     // ----- Constants -----
     const string SignatureTabDraw  = "draw";
@@ -387,6 +469,12 @@
     string _signerPosition         = string.Empty;
     string _signaturePlace         = string.Empty;
 
+    // ----- Rejection popup state -----
+    bool _rejectPopupVisible;
+    bool _isRejectSubmitting;
+    string _rejectReason = string.Empty;
+    string? _rejectValidationMessage;
+
     // ----- Lifecycle -----
     protected override async Task OnInitializedAsync()
     {
@@ -423,6 +511,11 @@
             _envelopeReceiver = await PageDataService.GetEnvelopeReceiverAsync(EnvelopeKey);
             if (_envelopeReceiver is null)
                 Logger.LogWarning("Envelope receiver data is null for {EnvelopeKey}", EnvelopeKey);
+            else if (IsRejected(_envelopeReceiver))
+            {
+                Navigation.NavigateTo($"/envelope/{Uri.EscapeDataString(EnvelopeKey)}/rejected", forceLoad: true);
+                return;
+            }
 
             // Build initial report (no signature image yet)
             _report = BuildReport(_pdfBytes, _signatures, capturedSignature: null);
@@ -468,6 +561,16 @@
     }
 
     // ----- Report builder -----
+    static bool IsRejected(EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver.EnvelopeReceiverDto envelopeReceiver)
+    {
+        var status = envelopeReceiver.Envelope?.Status;
+        if (status is EnvelopeStatus.DocumentRejected or EnvelopeStatus.EnvelopeRejected)
+            return true;
+
+        return envelopeReceiver.Envelope?.Histories?.Any(h =>
+            h.Status is EnvelopeStatus.DocumentRejected or EnvelopeStatus.EnvelopeRejected) == true;
+    }
+
     /// <summary>
     /// Builds an XtraReport wrapping the PDF bytes.
     /// If a signature is captured and there are signature fields, the signature image is
@@ -701,6 +804,56 @@
             forceLoad: true);
     }
 
+    void OpenRejectPopup()
+    {
+        _rejectValidationMessage = null;
+        _rejectPopupVisible = true;
+    }
+
+    void CloseRejectPopup()
+    {
+        if (_isRejectSubmitting)
+            return;
+
+        _rejectPopupVisible = false;
+    }
+
+    async Task SubmitRejectAsync()
+    {
+        if (_isRejectSubmitting)
+            return;
+
+        _isRejectSubmitting = true;
+        _rejectValidationMessage = null;
+        await InvokeAsync(StateHasChanged);
+
+        try
+        {
+            var reason = string.IsNullOrWhiteSpace(_rejectReason)
+                ? null
+                : _rejectReason.Trim();
+
+            if (string.IsNullOrWhiteSpace(EnvelopeKey))
+            {
+                _rejectValidationMessage = "Envelope-Schluessel fehlt.";
+                _isRejectSubmitting = false;
+                await InvokeAsync(StateHasChanged);
+                return;
+            }
+
+            await AnnotationService.RejectAsync(EnvelopeKey, reason);
+
+            Navigation.NavigateTo($"/envelope/login/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Failed to reject envelope {EnvelopeKey}", EnvelopeKey);
+            _rejectValidationMessage = "Die Ablehnung konnte nicht gespeichert werden. Bitte versuchen Sie es erneut.";
+            _isRejectSubmitting = false;
+            await InvokeAsync(StateHasChanged);
+        }
+    }
+
     async Task<string?> GetActiveSignatureDataUrlAsync()
     {
         if (_activeSignatureTab == SignatureTabDraw)

EnvelopeGenerator.Server/EnvelopeGenerator.Server/Components/Pages/ReceiverRejectedPage.razor

@@ -0,0 +1,105 @@
+@page "/envelope/{EnvelopeKey}/rejected"
+@rendermode InteractiveServer
+@using EnvelopeGenerator.Application.Resources
+@using EnvelopeGenerator.Domain.Constants
+@using EnvelopeGenerator.Domain.Interfaces
+@using Microsoft.Extensions.Localization
+@inject NavigationManager Navigation
+@inject EnvelopeGenerator.Server.Services.EnvelopeReceiverAuthorizationService ReceiverAuthorizationService
+@inject EnvelopeGenerator.Server.Services.EnvelopeReceiverPageDataService PageDataService
+@inject IStringLocalizer<Resource> UiLocalizer
+
+<div class="envelope-viewer-layout" style="justify-content: center; align-items: center; padding: 1.5rem;">
+    <div style="width: min(920px, 100%); background: rgba(255,255,255,0.96); border-radius: 20px; box-shadow: 0 18px 48px rgba(15,23,42,0.22); overflow: hidden;">
+        <div style="padding: 1.2rem 1.4rem; border-bottom: 1px solid rgba(15,23,42,0.08); background: linear-gradient(135deg, rgba(239,68,68,0.12) 0%, rgba(220,38,38,0.08) 100%);">
+            <div style="font-size: 1rem; font-weight: 700; color: #991b1b;">@L("DocRejected", "Dokument abgelehnt")</div>
+        </div>
+
+        <div style="padding: 2rem 1.5rem;">
+            <div style="display: flex; justify-content: center; margin-bottom: 1rem;">
+                <div style="width: 90px; height: 90px; border-radius: 999px; background: #fee2e2; display: inline-flex; align-items: center; justify-content: center; color: #b91c1c;">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" fill="currentColor" viewBox="0 0 16 16">
+                        <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z" />
+                    </svg>
+                </div>
+            </div>
+
+            <h2 style="text-align: center; font-size: 1.4rem; color: #7f1d1d; margin-bottom: 0.75rem;">
+                @(_isReadAndConfirm
+                    ? L("RejectionInfo1Confirmation", "Dieses Dokument wurde als nicht bestaetigt markiert.")
+                    : L("RejectionInfo1", "Dieses Dokument wurde abgelehnt."))
+            </h2>
+
+            <p style="text-align: center; margin: 0 auto; max-width: 760px; color: #374151; line-height: 1.6;">
+                @((MarkupString)_messageLine2)
+            </p>
+
+            <div style="margin-top: 1.4rem; text-align: center;">
+                <a href="/" class="btn btn-outline-secondary" style="font-weight: 600;">Portal Startseite</a>
+            </div>
+        </div>
+    </div>
+</div>
+
+@code {
+    [Parameter] public string? EnvelopeKey { get; set; }
+
+    bool _isReadAndConfirm;
+    string _messageLine2 = string.Empty;
+
+    protected override async Task OnInitializedAsync()
+    {
+        if (string.IsNullOrWhiteSpace(EnvelopeKey))
+        {
+            Navigation.NavigateTo("/");
+            return;
+        }
+
+        var user = await ReceiverAuthorizationService.AuthorizeAsync(EnvelopeKey);
+        if (user is null)
+        {
+            Navigation.NavigateTo($"/envelope/login/{Uri.EscapeDataString(EnvelopeKey)}");
+            return;
+        }
+
+        var envelopeReceiver = await PageDataService.GetEnvelopeReceiverAsync(EnvelopeKey);
+        if (envelopeReceiver is null)
+        {
+            Navigation.NavigateTo($"/envelope/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+            return;
+        }
+
+        if (!IsRejected(envelopeReceiver))
+        {
+            Navigation.NavigateTo($"/envelope/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+            return;
+        }
+
+        _isReadAndConfirm = envelopeReceiver.Envelope?.IsReadAndConfirm() ?? false;
+
+        var senderName = envelopeReceiver.Envelope?.User is null
+            ? string.Empty
+            : $"{envelopeReceiver.Envelope.User.Prename} {envelopeReceiver.Envelope.User.Name}".Trim();
+        var senderEmail = envelopeReceiver.Envelope?.User?.Email ?? string.Empty;
+        var envelopeTitle = envelopeReceiver.Envelope?.Title ?? string.Empty;
+
+        var template = L("RejectionInfo2", "Das Dokument \"{2}\" von {0} ({1}) wurde abgelehnt.");
+        _messageLine2 = string.Format(template, senderName, senderEmail, envelopeTitle);
+    }
+
+    static bool IsRejected(EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver.EnvelopeReceiverDto envelopeReceiver)
+    {
+        var status = envelopeReceiver.Envelope?.Status;
+        if (status is EnvelopeStatus.DocumentRejected or EnvelopeStatus.EnvelopeRejected)
+            return true;
+
+        return envelopeReceiver.Envelope?.Histories?.Any(h =>
+            h.Status is EnvelopeStatus.DocumentRejected or EnvelopeStatus.EnvelopeRejected) == true;
+    }
+
+    string L(string key, string fallback)
+    {
+        var value = UiLocalizer[key];
+        return value.ResourceNotFound ? fallback : value.Value;
+    }
+}

EnvelopeGenerator.Server/EnvelopeGenerator.Server/Controllers/AnnotationController.cs

@@ -100,11 +100,12 @@ public class AnnotationController : ControllerBase
     /// <summary>
     /// Rejects the document for the current receiver.
     /// </summary>
+    /// <param name="envelopeKey">Envelope key route parameter.</param>
     /// <param name="reason">Optional rejection reason.</param>
     [Authorize(Policy = AuthPolicy.Receiver)]
-    [HttpPost("reject")]
+    [HttpPost("reject/{envelopeKey}")]
     [Obsolete("Use MediatR")]
-    public async Task<IActionResult> Reject([FromBody] string? reason = null)
+    public async Task<IActionResult> Reject([FromRoute] string envelopeKey, [FromBody] string? reason = null)
     {
         var signature = User.ReceiverSignature();
         var uuid = User.EnvelopeUuid();

EnvelopeGenerator.Server/EnvelopeGenerator.Server/Extensions/ReceiverClaimExtensions.cs

@@ -67,7 +67,7 @@ public static class ReceiverClaimExtensions
     /// Gets the authenticated receiver email address from the claims.
     /// </summary>
     public static string ReceiverMail(this ClaimsPrincipal user)
-        => user.GetRequiredClaimValue(JwtRegisteredClaimNames.Email);
+        => user.GetRequiredClaimValue(JwtRegisteredClaimNames.Email, ClaimTypes.Email);
 
     /// <summary>
     /// Gets the authenticated envelope identifier from the claims.
@@ -120,4 +120,4 @@ public static class ReceiverClaimExtensions
     {
         return Role.Receiver.Authorized.Any(user.IsInRole);
     }
-}
+}

EnvelopeGenerator.Server/EnvelopeGenerator.Server/wwwroot/css/envelope-viewer.css

@@ -609,6 +609,29 @@ body.resizing {
     cursor: not-allowed;
 }
 
+.pdf-toolbar__btn--reject {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    min-width: auto;
+    padding: 0.5rem 0.75rem;
+    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08) 0%, rgba(220, 38, 38, 0.08) 100%);
+    border: 1px solid rgba(239, 68, 68, 0.3);
+    color: #b91c1c;
+}
+
+.pdf-toolbar__btn--reject:hover:not(:disabled) {
+    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
+    border-color: transparent;
+    color: #ffffff;
+    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
+}
+
+.pdf-toolbar__btn--reject:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+}
+
 .pdf-toolbar__btn-text {
     font-size: 0.813rem;
     font-weight: 600;
@@ -1211,6 +1234,18 @@ body.resizing {
     color: #a5b4fc;
 }
 
+[data-sf-theme="blazing-dark"] .pdf-toolbar__btn--reject {
+    background: rgba(239, 68, 68, 0.15);
+    border-color: rgba(248, 113, 113, 0.4);
+    color: #fca5a5;
+}
+
+[data-sf-theme="blazing-dark"] .pdf-toolbar__btn--reject:hover:not(:disabled) {
+    background: rgba(239, 68, 68, 0.35);
+    border-color: rgba(248, 113, 113, 0.6);
+    color: #ffffff;
+}
+
 /* Error container */
 [data-sf-theme="blazing-dark"] .error-container .alert-danger {
     background: rgba(239, 68, 68, 0.12);