Merge branch 'master' into feat/blazor-receiver-ui

Integrate YARP to forward all /api/** requests from the browser to the backend EnvelopeGenerator.API service. Add Yarp.ReverseProxy package, configure proxy routes and clusters in appsettings.json, and register YARP in Program.cs. Add API base URL configuration and register ReceiverApiClient, LocalizationService, and ReceiverAuthState as scoped services to support both server and client scenarios. This improves API/UI separation and authentication handling.

EnvelopeGenerator.API/Controllers/AnnotationController.cs

@@ -1,5 +1,6 @@
 using DigitalData.Core.Abstraction.Application.DTO;
 using DigitalData.Core.Exceptions;
+using EnvelopeGenerator.Application.Common.Dto;
 using EnvelopeGenerator.Application.Common.Extensions;
 using EnvelopeGenerator.Application.Common.Interfaces.Services;
 using EnvelopeGenerator.Application.Common.Notifications.DocSigned;
@@ -7,11 +8,13 @@ using EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
 using EnvelopeGenerator.Application.Histories.Queries;
 using EnvelopeGenerator.Domain.Constants;
 using EnvelopeGenerator.API.Extensions;
+using EnvelopeGenerator.API.Models;
 using MediatR;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
+using System.Dynamic;
 
 namespace EnvelopeGenerator.API.Controllers;
 
@@ -115,4 +118,127 @@ public class AnnotationController : ControllerBase
         _logger.LogNotice(histRes.Notices);
         return StatusCode(500, histRes.Messages);
     }
+
+    /// <summary>
+    /// Returns the signature placeholders (id, page, x, y, width, height)
+    /// the authenticated receiver must sign on the current envelope.
+    /// Used by the Blazor receiver UI to render a custom signature overlay
+    /// on top of the DevExpress PDF viewer.
+    /// </summary>
+    [Authorize(Policy = AuthPolicy.Receiver)]
+    [HttpGet("elements")]
+    public async Task<IActionResult> GetElements(CancellationToken cancel)
+    {
+        var signature = User.GetReceiverSignatureOfReceiver();
+        var uuid = User.GetEnvelopeUuidOfReceiver();
+
+        var envelopeReceiver = await _mediator.ReadEnvelopeReceiverAsync(uuid, signature, cancel)
+            ?? throw new NotFoundException("Envelope receiver is not found.");
+
+        var elements = envelopeReceiver.Envelope?.Documents?.FirstOrDefault()?.Elements
+            ?? Enumerable.Empty<Application.Common.Dto.SignatureDto>();
+
+        // Only expose what the overlay needs (no internal columns).
+        var payload = elements
+            .Where(e => e.ReceiverId == envelopeReceiver.ReceiverId)
+            .Select(e => new
+            {
+                id       = e.Id,
+                page     = e.Page,
+                x        = e.X,
+                y        = e.Y,
+                width    = e.Width,
+                height   = e.Height,
+                required = e.Required,
+                tooltip  = e.Tooltip,
+            });
+
+        return Ok(payload);
+    }
+
+    /// <summary>
+    /// Signs the document for the authenticated receiver using a Blazor /
+    /// DevExpress friendly payload (one PNG image per placeholder, plus
+    /// optional position / city per placeholder).
+    ///
+    /// Internally produces a <see cref="PsPdfKitAnnotation"/> wrapping a
+    /// list of <see cref="AnnotationCreateDto"/> entries so that the
+    /// existing notification pipeline (mail / status / annotation persistence)
+    /// is fully reused. The Instant JSON is left blank because the Blazor
+    /// pipeline does not depend on PSPDFKit-side rendering.
+    /// </summary>
+    [Authorize(Policy = AuthPolicy.Receiver)]
+    [HttpPost("blazor")]
+    public async Task<IActionResult> SignBlazor([FromBody] BlazorSignaturePayload payload, CancellationToken cancel)
+    {
+        if (payload is null || payload.Signatures.Count == 0)
+            return BadRequest();
+
+        var signature = User.GetReceiverSignatureOfReceiver();
+        var uuid = User.GetEnvelopeUuidOfReceiver();
+
+        var envelopeReceiver = await _mediator.ReadEnvelopeReceiverAsync(uuid, signature, cancel)
+            ?? throw new NotFoundException("Envelope receiver is not found.");
+
+        if (await _mediator.IsSignedAsync(uuid, signature, cancel))
+            return Problem(statusCode: StatusCodes.Status409Conflict);
+
+        if (await _mediator.AnyHistoryAsync(uuid, new[] { EnvelopeStatus.EnvelopeRejected, EnvelopeStatus.DocumentRejected }, cancel))
+            return Problem(statusCode: StatusCodes.Status423Locked);
+
+        // Build a structured AnnotationCreateDto list out of the lightweight
+        // payload. One DTO per (element, kind) tuple, mirroring how the legacy
+        // PSPDFKit pipeline produced multiple form fields per placeholder.
+        var structured = new List<AnnotationCreateDto>();
+        foreach (var entry in payload.Signatures)
+        {
+            structured.Add(new AnnotationCreateDto
+            {
+                ElementId = entry.ElementId,
+                Name      = $"{entry.ElementId}#signature",
+                Type      = "signature",
+                Value     = entry.SignatureDataUrl,
+            });
+            if (!string.IsNullOrWhiteSpace(entry.Position))
+            {
+                structured.Add(new AnnotationCreateDto
+                {
+                    ElementId = entry.ElementId,
+                    Name      = $"{entry.ElementId}#position",
+                    Type      = "position",
+                    Value     = entry.Position!,
+                });
+            }
+            if (!string.IsNullOrWhiteSpace(entry.City))
+            {
+                structured.Add(new AnnotationCreateDto
+                {
+                    ElementId = entry.ElementId,
+                    Name      = $"{entry.ElementId}#city",
+                    Type      = "city",
+                    Value     = entry.City!,
+                });
+            }
+            structured.Add(new AnnotationCreateDto
+            {
+                ElementId = entry.ElementId,
+                Name      = $"{entry.ElementId}#date",
+                Type      = "date",
+                Value     = entry.SignedAt.ToString("o"),
+            });
+        }
+
+        // No PSPDFKit Instant JSON for the Blazor flow — pass an empty object.
+        var psPdfKitAnnotation = new PsPdfKitAnnotation(new ExpandoObject(), structured);
+
+        var docSignedNotification = await _mediator
+            .ReadEnvelopeReceiverAsync(uuid, signature, cancel)
+            .ToDocSignedNotification(psPdfKitAnnotation)
+            ?? throw new NotFoundException("Envelope receiver is not found.");
+
+        await _mediator.PublishSafely(docSignedNotification, cancel);
+        await HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
+
+        return Ok();
+    }
 }

EnvelopeGenerator.API/Controllers/ReceiverAuthController.cs

@@ -0,0 +1,407 @@
+using EnvelopeGenerator.API.Models;
+using EnvelopeGenerator.Application.Common.Extensions;
+using EnvelopeGenerator.Application.Common.Interfaces.Services;
+using EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
+using EnvelopeGenerator.Domain.Constants;
+using EnvelopeGenerator.API.Extensions;
+using MediatR;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Mvc;
+using OtpNet;
+
+namespace EnvelopeGenerator.API.Controllers;
+
+/// <summary>
+/// REST-API für den Empfänger-Authentifizierungs-Flow.
+/// 
+/// Entspricht der Logik in EnvelopeGenerator.Web.Controllers.EnvelopeController
+/// (Main + LogInEnvelope), aber gibt JSON statt Views zurück.
+/// 
+/// Der Blazor-Client (ReceiverUI) ruft diese Endpunkte auf.
+/// 
+/// FLOW:
+/// 1. Client ruft GET  /api/receiverauth/{key}/status     → Prüft Status
+/// 2. Client ruft POST /api/receiverauth/{key}/access-code → Sendet AccessCode
+/// 3. Client ruft POST /api/receiverauth/{key}/tfa         → Sendet TFA-Code
+/// 
+/// Nach erfolgreicher Authentifizierung wird ein Cookie gesetzt (SignInEnvelopeAsync).
+/// Danach kann der Client die Dokument-Daten über die bestehenden Envelope-Endpunkte laden.
+/// </summary>
+[Route("api/[controller]")]
+[ApiController]
+public class ReceiverAuthController : ControllerBase
+{
+    private readonly ILogger<ReceiverAuthController> _logger;
+    private readonly IMediator _mediator;
+    private readonly IEnvelopeReceiverService _envRcvService;
+    private readonly IEnvelopeHistoryService _historyService;
+    private readonly IAuthenticator _authenticator;
+    private readonly IReceiverService _rcvService;
+    private readonly IEnvelopeSmsHandler _envSmsHandler;
+
+    public ReceiverAuthController(
+        ILogger<ReceiverAuthController> logger,
+        IMediator mediator,
+        IEnvelopeReceiverService envRcvService,
+        IEnvelopeHistoryService historyService,
+        IAuthenticator authenticator,
+        IReceiverService rcvService,
+        IEnvelopeSmsHandler envSmsHandler)
+    {
+        _logger = logger;
+        _mediator = mediator;
+        _envRcvService = envRcvService;
+        _historyService = historyService;
+        _authenticator = authenticator;
+        _rcvService = rcvService;
+        _envSmsHandler = envSmsHandler;
+    }
+
+    // ══════════════════════════════════════════════════════════════
+    // ENDPUNKT 1: STATUS PRÜFEN
+    // Entspricht: Web.EnvelopeController.Main()
+    // ══════════════════════════════════════════════════════════════
+
+    /// <summary>
+    /// Prüft den aktuellen Status eines Umschlags für den Empfänger.
+    /// Entscheidet ob: NotFound, Rejected, Signed, AccessCode nötig, oder direkt anzeigen.
+    /// </summary>
+    /// <param name="key">Der EnvelopeReceiver-Key aus der URL (Base64-kodiert)</param>
+    /// <param name="cancel">Cancellation-Token</param>
+    /// <returns>ReceiverAuthResponse mit dem aktuellen Status</returns>
+    [HttpGet("{key}/status")]
+    public async Task<IActionResult> GetStatus([FromRoute] string key, CancellationToken cancel)
+    {
+        try
+        {
+            // ── Key dekodieren ──
+            if (!key.TryDecode(out var decoded))
+                return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+            // ── ReadOnly-Links ──
+            if (decoded.GetEncodeType() == EncodeType.EnvelopeReceiverReadOnly)
+            {
+                return Ok(new ReceiverAuthResponse
+                {
+                    Status = "show_document",
+                    ReadOnly = true
+                });
+            }
+
+            // ── EnvelopeReceiver laden (Light-Query: ohne Documents/Elements) ──
+            var er = await _mediator.Send(
+                new ReadEnvelopeReceiverLightQuery { Key = key }, cancel);
+            if (er is null)
+                return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+            // ── Abgelehnt? ──
+            var rejRcvrs = await _historyService.ReadRejectingReceivers(er.Envelope!.Id);
+            if (rejRcvrs.Any())
+            {
+                await HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
+                return Ok(new ReceiverAuthResponse
+                {
+                    Status = "rejected",
+                    Title = er.Envelope.Title,
+                    SenderEmail = er.Envelope.User?.Email
+                });
+            }
+
+            // ── Bereits signiert? ──
+            if (await _historyService.IsSigned(
+                    envelopeId: er.Envelope.Id,
+                    userReference: er.Receiver!.EmailAddress))
+            {
+                await HttpContext.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
+                return Ok(new ReceiverAuthResponse
+                {
+                    Status = "already_signed",
+                    Title = er.Envelope.Title,
+                    SenderEmail = er.Envelope.User?.Email
+                });
+            }
+
+            // ── Kein AccessCode nötig? → Direkt SignIn ──
+            if (!er.Envelope.UseAccessCode)
+            {
+                (string? uuid, string? signature) = decoded.ParseEnvelopeReceiverId();
+                var erSecretRes = await _envRcvService.ReadWithSecretByUuidSignatureAsync(
+                    uuid: uuid!, signature: signature!);
+
+                if (erSecretRes.IsFailed)
+                    return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+                await HttpContext.SignInEnvelopeAsync(erSecretRes.Data, Role.ReceiverFull);
+
+                return Ok(new ReceiverAuthResponse
+                {
+                    Status = "show_document",
+                    Title = er.Envelope.Title,
+                    Message = er.Envelope.Message,
+                    SenderEmail = er.Envelope.User?.Email,
+                    ReadOnly = er.Envelope.ReadOnly
+                });
+            }
+
+            // ── AccessCode nötig ──
+            // HINWEIS: Die E-Mail mit dem AccessCode wird NICHT hier gesendet.
+            // Das passiert bereits im Web-Projekt, wenn der Link generiert wird.
+            // Der Blazor-Flow übernimmt erst NACH dem E-Mail-Versand.
+            bool accessCodeAlreadyRequested = await _historyService.AccessCodeAlreadyRequested(
+                envelopeId: er.Envelope.Id,
+                userReference: er.Receiver.EmailAddress);
+
+            if (!accessCodeAlreadyRequested)
+            {
+                // AccessCode wurde noch nie angefordert — das bedeutet der Empfänger
+                // kommt zum ersten Mal. Wir zeichnen es auf, aber die E-Mail
+                // wurde bereits vom Web-Projekt gesendet.
+                await _historyService.RecordAsync(
+                    er.EnvelopeId, er.Receiver.EmailAddress, EnvelopeStatus.AccessCodeRequested);
+            }
+
+            // ── Prüfe ob der Nutzer bereits eingeloggt ist ──
+            if (User.IsInRole(Role.ReceiverFull))
+            {
+                return Ok(new ReceiverAuthResponse
+                {
+                    Status = "show_document",
+                    Title = er.Envelope.Title,
+                    Message = er.Envelope.Message,
+                    SenderEmail = er.Envelope.User?.Email,
+                    ReadOnly = er.Envelope.ReadOnly
+                });
+            }
+
+            return Ok(new ReceiverAuthResponse
+            {
+                Status = "requires_access_code",
+                Title = er.Envelope.Title,
+                SenderEmail = er.Envelope.User?.Email,
+                TfaEnabled = er.Envelope.TFAEnabled,
+                HasPhoneNumber = er.HasPhoneNumber
+            });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error checking status for key {Key}", key);
+            return StatusCode(500, new ReceiverAuthResponse
+            {
+                Status = "error",
+                ErrorMessage = "Ein unerwarteter Fehler ist aufgetreten."
+            });
+        }
+    }
+
+    // ══════════════════════════════════════════════════════════════
+    // ENDPUNKT 2: ACCESS-CODE PRÜFEN
+    // ══════════════════════════════════════════════════════════════
+
+    /// <summary>
+    /// Prüft den eingegebenen Zugangscode.
+    /// Bei Erfolg: SignIn oder TFA-Weiterleitung.
+    /// Bei Fehler: Fehlermeldung zurückgeben.
+    /// </summary>
+    [HttpPost("{key}/access-code")]
+    public async Task<IActionResult> SubmitAccessCode(
+        [FromRoute] string key,
+        [FromBody] AccessCodeRequest request,
+        CancellationToken cancel)
+    {
+        try
+        {
+            // ── Key dekodieren + Daten laden ──
+            (string? uuid, string? signature) = key.DecodeEnvelopeReceiverId();
+            if (uuid is null || signature is null)
+                return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+            var erSecretRes = await _envRcvService.ReadWithSecretByUuidSignatureAsync(
+                uuid: uuid, signature: signature);
+
+            if (erSecretRes.IsFailed)
+                return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+            var erSecret = erSecretRes.Data;
+
+            // ── AccessCode prüfen ──
+            if (erSecret.AccessCode != request.AccessCode)
+            {
+                await _historyService.RecordAsync(
+                    erSecret.EnvelopeId,
+                    erSecret.Receiver!.EmailAddress,
+                    EnvelopeStatus.AccessCodeIncorrect);
+
+                return Unauthorized(new ReceiverAuthResponse
+                {
+                    Status = "requires_access_code",
+                    Title = erSecret.Envelope!.Title,
+                    SenderEmail = erSecret.Envelope.User?.Email,
+                    TfaEnabled = erSecret.Envelope.TFAEnabled,
+                    HasPhoneNumber = erSecret.HasPhoneNumber,
+                    ErrorMessage = "Falscher Zugangscode."
+                });
+            }
+
+            // ── AccessCode korrekt ──
+            await _historyService.RecordAsync(
+                erSecret.EnvelopeId,
+                erSecret.Receiver!.EmailAddress,
+                EnvelopeStatus.AccessCodeCorrect);
+
+            // ── TFA erforderlich? ──
+            if (erSecret.Envelope!.TFAEnabled)
+            {
+                var rcv = erSecret.Receiver;
+                if (rcv.TotpSecretkey is null)
+                {
+                    rcv.TotpSecretkey = _authenticator.GenerateTotpSecretKey();
+                    await _rcvService.UpdateAsync(rcv);
+                }
+
+                await HttpContext.SignInEnvelopeAsync(erSecret, Role.ReceiverTFA);
+
+                if (request.PreferSms)
+                {
+                    var (smsRes, expiration) = await _envSmsHandler.SendTotpAsync(erSecret);
+
+                    return Ok(new ReceiverAuthResponse
+                    {
+                        Status = "requires_tfa",
+                        TfaType = "sms",
+                        TfaExpiration = expiration,
+                        Title = erSecret.Envelope.Title,
+                        SenderEmail = erSecret.Envelope.User?.Email,
+                        HasPhoneNumber = erSecret.HasPhoneNumber
+                    });
+                }
+                else
+                {
+                    return Ok(new ReceiverAuthResponse
+                    {
+                        Status = "requires_tfa",
+                        TfaType = "authenticator",
+                        Title = erSecret.Envelope.Title,
+                        SenderEmail = erSecret.Envelope.User?.Email,
+                        HasPhoneNumber = erSecret.HasPhoneNumber
+                    });
+                }
+            }
+
+            // ── Kein TFA → Direkt SignIn ──
+            await HttpContext.SignInEnvelopeAsync(erSecret, Role.ReceiverFull);
+
+            return Ok(new ReceiverAuthResponse
+            {
+                Status = "show_document",
+                Title = erSecret.Envelope.Title,
+                Message = erSecret.Envelope.Message,
+                SenderEmail = erSecret.Envelope.User?.Email,
+                ReadOnly = erSecret.Envelope.ReadOnly
+            });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error submitting access code for key {Key}", key);
+            return StatusCode(500, new ReceiverAuthResponse
+            {
+                Status = "error",
+                ErrorMessage = "Ein unerwarteter Fehler ist aufgetreten."
+            });
+        }
+    }
+
+    // ══════════════════════════════════════════════════════════════
+    // ENDPUNKT 3: TFA-CODE PRÜFEN
+    // ══════════════════════════════════════════════════════════════
+
+    /// <summary>
+    /// Prüft den TFA-Code (SMS oder Authenticator).
+    /// Setzt voraus, dass der Nutzer bereits mit ReceiverTFA-Rolle eingeloggt ist.
+    /// </summary>
+    [HttpPost("{key}/tfa")]
+    public async Task<IActionResult> SubmitTfaCode(
+        [FromRoute] string key,
+        [FromBody] TfaCodeRequest request,
+        CancellationToken cancel)
+    {
+        try
+        {
+            if (!User.IsInRole(Role.ReceiverTFA))
+                return Unauthorized(new ReceiverAuthResponse
+                {
+                    Status = "requires_access_code",
+                    ErrorMessage = "Bitte zuerst den Zugangscode eingeben."
+                });
+
+            (string? uuid, string? signature) = key.DecodeEnvelopeReceiverId();
+            if (uuid is null || signature is null)
+                return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+            var erSecretRes = await _envRcvService.ReadWithSecretByUuidSignatureAsync(
+                uuid: uuid, signature: signature);
+
+            if (erSecretRes.IsFailed)
+                return NotFound(new ReceiverAuthResponse { Status = "not_found" });
+
+            var erSecret = erSecretRes.Data;
+
+            if (erSecret.Receiver!.TotpSecretkey is null)
+            {
+                _logger.LogError("TotpSecretkey is null for receiver {Signature}", signature);
+                return StatusCode(500, new ReceiverAuthResponse
+                {
+                    Status = "error",
+                    ErrorMessage = "TFA-Konfiguration fehlt."
+                });
+            }
+
+            bool codeValid;
+
+            if (request.Type == "sms")
+            {
+                codeValid = _envSmsHandler.VerifyTotp(request.Code, erSecret.Receiver.TotpSecretkey);
+            }
+            else
+            {
+                codeValid = _authenticator.VerifyTotp(
+                    request.Code,
+                    erSecret.Receiver.TotpSecretkey,
+                    window: VerificationWindow.RfcSpecifiedNetworkDelay);
+            }
+
+            if (!codeValid)
+            {
+                return Unauthorized(new ReceiverAuthResponse
+                {
+                    Status = "requires_tfa",
+                    TfaType = request.Type,
+                    Title = erSecret.Envelope!.Title,
+                    SenderEmail = erSecret.Envelope.User?.Email,
+                    HasPhoneNumber = erSecret.HasPhoneNumber,
+                    ErrorMessage = "Falscher Code."
+                });
+            }
+
+            await HttpContext.SignInEnvelopeAsync(erSecret, Role.ReceiverFull);
+
+            return Ok(new ReceiverAuthResponse
+            {
+                Status = "show_document",
+                Title = erSecret.Envelope!.Title,
+                Message = erSecret.Envelope.Message,
+                SenderEmail = erSecret.Envelope.User?.Email,
+                ReadOnly = erSecret.Envelope.ReadOnly
+            });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error submitting TFA code for key {Key}", key);
+            return StatusCode(500, new ReceiverAuthResponse
+            {
+                Status = "error",
+                ErrorMessage = "Ein unerwarteter Fehler ist aufgetreten."
+            });
+        }
+    }
+}

EnvelopeGenerator.API/Models/BlazorSignaturePayload.cs

@@ -0,0 +1,42 @@
+namespace EnvelopeGenerator.API.Models;
+
+/// <summary>
+/// Lightweight payload used by the Blazor receiver UI to submit signatures.
+/// Each entry corresponds to one signature placeholder rendered as an
+/// overlay on top of the DevExpress PDF viewer.
+///
+/// The legacy MVC flow ships a full PSPDFKit InstantJSON payload via
+/// <see cref="EnvelopeGenerator.Application.Common.Notifications.DocSigned.PsPdfKitAnnotation"/>.
+/// That format is browser-library specific. The Blazor client uses a
+/// transport-neutral DTO instead: only what the server actually needs
+/// to persist the signed document (image + metadata per placeholder).
+///
+/// Conversion to the internal <c>PsPdfKitAnnotation</c> happens inside
+/// <see cref="EnvelopeGenerator.API.Controllers.AnnotationController"/>.
+/// </summary>
+public class BlazorSignaturePayload
+{
+    /// <summary>The receiver-specific signed placeholders for this envelope.</summary>
+    public List<BlazorSignatureEntry> Signatures { get; set; } = new();
+}
+
+/// <summary>
+/// A single signed placeholder.
+/// </summary>
+public class BlazorSignatureEntry
+{
+    /// <summary>The receiver's <c>DocumentReceiverElement.Id</c> being signed.</summary>
+    public int ElementId { get; set; }
+
+    /// <summary>Signature image as a data URL (e.g. "data:image/png;base64,...").</summary>
+    public string SignatureDataUrl { get; set; } = string.Empty;
+
+    /// <summary>Optional position / job title entered by the receiver.</summary>
+    public string? Position { get; set; }
+
+    /// <summary>Optional city / location entered by the receiver.</summary>
+    public string? City { get; set; }
+
+    /// <summary>Capture timestamp (client local time).</summary>
+    public DateTime SignedAt { get; set; }
+}

EnvelopeGenerator.API/Models/ReceiverAuthResponse.cs

@@ -0,0 +1,78 @@
+namespace EnvelopeGenerator.API.Models;
+
+/// <summary>
+/// Einheitliche Antwort des ReceiverAuthControllers.
+/// 
+/// WARUM ein einziges Response-Objekt für alle Endpunkte?
+/// - Der Client braucht nur ein Format zu verstehen
+/// - Der Status-String bestimmt, welche Felder relevant sind
+/// - Entspricht dem, was der Web-Controller bisher über ViewData verteilt hat
+/// 
+/// Status-Werte und was sie bedeuten:
+/// - "requires_access_code" → AccessCode-Eingabe zeigen
+/// - "requires_tfa"         → TFA-Code-Eingabe zeigen (nach AccessCode)
+/// - "show_document"        → Dokument laden und anzeigen
+/// - "already_signed"       → Info-Seite "Bereits unterschrieben"
+/// - "rejected"             → Info-Seite "Abgelehnt"
+/// - "not_found"            → Fehler-Seite "Nicht gefunden"
+/// - "expired"              → Fehler-Seite "Link abgelaufen"
+/// </summary>
+public class ReceiverAuthResponse
+{
+    /// <summary>Aktueller Status des Empfänger-Flows</summary>
+    public required string Status { get; init; }
+
+    /// <summary>Titel des Umschlags (z.B. "Vertragsdokument")</summary>
+    public string? Title { get; init; }
+
+    /// <summary>Nachricht des Absenders</summary>
+    public string? Message { get; init; }
+
+    /// <summary>E-Mail des Absenders (für Rückfragen-Hinweis)</summary>
+    public string? SenderEmail { get; init; }
+
+    /// <summary>Name des Empfängers</summary>
+    public string? ReceiverName { get; init; }
+
+    /// <summary>Ob TFA für diesen Umschlag aktiviert ist</summary>
+    public bool TfaEnabled { get; init; }
+
+    /// <summary>Ob der Empfänger eine Telefonnummer hat (für SMS-TFA)</summary>
+    public bool HasPhoneNumber { get; init; }
+
+    /// <summary>Ob das Dokument nur gelesen werden soll (ReadAndConfirm)</summary>
+    public bool ReadOnly { get; init; }
+
+    /// <summary>TFA-Typ: "sms" oder "authenticator" (wenn Status = "requires_tfa")</summary>
+    public string? TfaType { get; init; }
+
+    /// <summary>Ablaufzeit des SMS-Codes (für Countdown-Timer)</summary>
+    public DateTime? TfaExpiration { get; init; }
+
+    /// <summary>Fehlermeldung (z.B. "Falscher Zugangscode")</summary>
+    public string? ErrorMessage { get; init; }
+}
+
+/// <summary>
+/// Request-Body für POST /api/receiverauth/{key}/access-code
+/// </summary>
+public class AccessCodeRequest
+{
+    /// <summary>Der vom Empfänger eingegebene Zugangscode</summary>
+    public required string AccessCode { get; init; }
+
+    /// <summary>Ob SMS statt Authenticator bevorzugt wird</summary>
+    public bool PreferSms { get; init; }
+}
+
+/// <summary>
+/// Request-Body für POST /api/receiverauth/{key}/tfa
+/// </summary>
+public class TfaCodeRequest
+{
+    /// <summary>Der eingegebene TFA-Code (6-stellig)</summary>
+    public required string Code { get; init; }
+
+    /// <summary>"sms" oder "authenticator"</summary>
+    public required string Type { get; init; }
+}

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/ReadEnvelopeReceiverLightQuery.cs

@@ -0,0 +1,60 @@
+using AutoMapper;
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver;
+using EnvelopeGenerator.Application.Common.Extensions;
+using EnvelopeGenerator.Application.Common.Query;
+using EnvelopeGenerator.Application.Envelopes.Queries;
+using EnvelopeGenerator.Application.Receivers.Queries;
+using EnvelopeGenerator.Domain.Entities;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
+
+/// <summary>
+/// Leichte Variante von <see cref="ReadEnvelopeReceiverQuery"/>:
+/// Lädt NUR Envelope (mit Histories + User) und Receiver.
+/// Lädt NICHT Documents/Elements.
+/// 
+/// Verwendung: Status-Prüfungen wo keine Dokument-Daten benötigt werden
+/// (z.B. ReceiverAuthController.GetStatus).
+/// </summary>
+public record ReadEnvelopeReceiverLightQuery
+    : EnvelopeReceiverQueryBase<ReadEnvelopeQuery, ReadReceiverQuery>, IRequest<EnvelopeReceiverDto?>;
+
+/// <summary>
+/// Handler für <see cref="ReadEnvelopeReceiverLightQuery"/>.
+/// </summary>
+public class ReadEnvelopeReceiverLightQueryHandler
+    : IRequestHandler<ReadEnvelopeReceiverLightQuery, EnvelopeReceiverDto?>
+{
+    private readonly IRepository<EnvelopeReceiver> _repo;
+    private readonly IMapper _mapper;
+
+    /// <summary>
+    /// Konstruktor.
+    /// </summary>
+    /// <param name="repo">EnvelopeReceiver-Repository</param>
+    /// <param name="mapper">AutoMapper</param>
+    public ReadEnvelopeReceiverLightQueryHandler(IRepository<EnvelopeReceiver> repo, IMapper mapper)
+    {
+        _repo = repo;
+        _mapper = mapper;
+    }
+
+    /// <summary>
+    /// Lädt einen EnvelopeReceiver ohne Documents/Elements.
+    /// </summary>
+    public async Task<EnvelopeReceiverDto?> Handle(ReadEnvelopeReceiverLightQuery request, CancellationToken cancel)
+    {
+        var envRcv = await _repo.Query
+            .Where(request, notnull: false)
+            .AsNoTracking()
+            .Include(er => er.Envelope).ThenInclude(e => e!.Histories)
+            .Include(er => er.Envelope).ThenInclude(e => e!.User)
+            .Include(er => er.Receiver)
+            .FirstOrDefaultAsync(cancel);
+
+        return envRcv is null ? null : _mapper.Map<EnvelopeReceiverDto>(envRcv);
+    }
+}

EnvelopeGenerator.ReceiverUI/App.razor

@@ -1,10 +0,0 @@
-<Router AppAssembly="@typeof(Program).Assembly">
-    <Found Context="routeData">
-        <RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
-    </Found>
-    <NotFound>
-        <LayoutView Layout="@typeof(MainLayout)">
-            <p>Sorry, there's nothing at this address.</p>
-        </LayoutView>
-    </NotFound>
-</Router>

EnvelopeGenerator.ReceiverUI/Data/Adjustment.cs

@@ -1,44 +0,0 @@
-namespace EnvelopeGenerator.ReceiverUI.Data {
-    public class Adjustment
-    {
-        public static Adjustment CreateBalanceForward(DateTime dt, int random)
-        {
-            var rnd = new DeterministicRandom(random);
-            Adjustment res = new Adjustment();
-            res.currentDateTime = dt;
-            res.currentDescription = "Balance Forward";
-            res.currentAmount = rnd.Random(10, 300) * 10;
-            return res;
-        }
-        public static Adjustment CreatePayment(DateTime dt, int random)
-        {
-            var rnd = new DeterministicRandom(random);
-            Adjustment res = new Adjustment();
-            res.currentDateTime = dt;
-            res.currentDescription = "Payment";
-            res.currentAmount = -rnd.Random(1, 40) * 10;
-            return res;
-        }
-        public static Adjustment CreateCharge(DateTime dt, int random)
-        {
-            var rnd = new DeterministicRandom(random);
-            Adjustment res = new Adjustment();
-            res.currentDateTime = dt;
-            res.currentDescription = rnd.GetRandomItem(bills);
-            res.currentAmount = rnd.Random(10, 50) * 10;
-            return res;
-        }
-
-        DateTime currentDateTime;
-        string currentDescription = "";
-        double currentAmount = 0;
-        static readonly string[] bills = new string[] { "Bill - Insurance", "Bill - Electricity", "Bill - Rent", "Bill - Phone", "Bill - Office Supplies" };
-        public DateTime Date { get { return currentDateTime; } }
-        public string Description { get { return currentDescription; } }
-        public double Amount { get { return currentAmount; } }
-
-        public Adjustment()
-        {
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Data/Customer.cs

@@ -1,64 +0,0 @@
-using DevExpress.DataAccess.Sql;
-using DevExpress.DataAccess.Sql.DataApi;
-
-namespace EnvelopeGenerator.ReceiverUI.Data {
-    public class Customer {
-        static List<Customer> currentCustomers = new List<Customer>();
-
-        public static List<Customer> Customers { get { return currentCustomers; } }
-        static Customer() {
-            try {
-                SqlDataSource ds = new SqlDataSource("NWindConnectionString");
-                SelectQuery query = SelectQueryFluentBuilder
-                    .AddTable("Customers")
-                    .SelectAllColumns()
-                    .Build("Customers");
-                ds.Queries.Add(query);
-                ds.RebuildResultSchema();
-                ds.Fill();
-                ITable src = ds.Result["Customers"];
-                foreach(var row in src) {
-                    currentCustomers.Add(new Customer() {
-                        CustomerID = row.GetValue<string>("CustomerID"),
-                        Address = row.GetValue<string>("Address"),
-                        CompanyName = row.GetValue<string>("CompanyName"),
-                        ContactName = row.GetValue<string>("ContactName"),
-                        ContactTitle = row.GetValue<string>("ContactTitle"),
-                        Country = row.GetValue<string>("Country"),
-                        City = row.GetValue<string>("City"),
-                        Fax = row.GetValue<string>("Fax"),
-                        Phone = row.GetValue<string>("Phone"),
-                        PostalCode = row.GetValue<string>("PostalCode"),
-                        Region = row.GetValue<string>("Region")
-                    });
-                }
-            } catch {
-                currentCustomers.Add(new Customer() { 
-                    Address = "Obere Str. 57",
-                    City = "Berlin",
-                    CompanyName = "Alfreds Futterkiste",
-                    ContactName = "Maria Anders",
-                    ContactTitle = "Sales Representative",
-                    Country = "Germany",
-                    CustomerID = "ALFKI",
-                    Fax = "030-0076545",
-                    Phone = "030-0074321",
-                    PostalCode = "12209"
-                });
-            }
-        }
-
-        public string CustomerID { get; set; }
-        public string CompanyName { get; set; }
-        public string ContactName { get; set; }
-        public string ContactTitle { get; set; }
-        public string Address { get; set; }
-        public string City { get; set; }
-        public string PostalCode { get; set; }
-        public string Region { get; set; }
-        public string Country { get; set; }
-        public string Phone { get; set; }
-        public string Fax { get; set; }
-
-    }
-}

EnvelopeGenerator.ReceiverUI/Data/DataItem.cs

@@ -1,71 +0,0 @@
-namespace EnvelopeGenerator.ReceiverUI.Data {
-    public class DataItem {
-        static readonly string[] accountType = new string[] { "Energy", "Manufacturing", "Estate", "Food", "Services" };
-        public string CustomerID { get; set; }
-        public string CompanyName { get; set; }
-        public string ContactName { get; set; }
-        public string ContactTitle { get; set; }
-        public string Address { get; set; }
-        public string City { get; set; }
-        public string PostalCode { get; set; }
-        public string Region { get; set; }
-        public string Country { get; set; }
-        public string Phone { get; set; }
-        public string Fax { get; set; }
-        public string Email { get; set; }
-        public string Invoice { get; set; }
-        public string CustomerAccount { get; set; }
-        public string CustomerIdentifiers { get; set; }
-        public DateTime BillingDate { get; set; }
-        public DateTime BillingPeriodStart { get; set; }
-        public DateTime BillingPeriodEnd { get; set; }
-        public string Terms { get; set; }
-        public string TermsID { get; set; }
-        public Adjustment[] Adjustments { get; set; }
-
-        public DataItem(int i) {
-            var rnd = new DeterministicRandom(i);
-            Customer c = rnd.GetRandomItem(Customer.Customers);
-            CustomerID = c.CustomerID;
-            CompanyName = c.CompanyName;
-            ContactName = c.ContactName;
-            ContactTitle = c.ContactTitle;
-            Address = c.Address;
-            City = c.City;
-            PostalCode = c.PostalCode;
-            Region = c.Region;
-            Country = c.Country;
-            Phone = c.Phone;
-            Fax = c.Fax;
-            Email = ContactName.Split(' ')[0].Replace(' ', '.').ToLower() + "@" + CompanyName.Split(' ')[0].ToLower() + ".com";
-            Invoice = string.Format("{0}{1}-{2}", rnd.RandomChar, rnd.Random(100, 1000), rnd.Random(100, 1000));
-            CustomerAccount = rnd.GetRandomItem(accountType);
-            CustomerIdentifiers = string.Format("{0}-{1}", rnd.Random(1000, 10000), rnd.Random(10, 100));
-            BillingPeriodStart = rnd.RandomTime();
-            BillingPeriodEnd = rnd.RandomTime(BillingPeriodStart, 7 * 24, 30 * 24);
-            BillingDate = rnd.RandomTime(BillingPeriodEnd, 7 * 24, 30 * 24);
-            Term currentTerm = rnd.GetRandomItem(Term.Terms);
-            Terms = currentTerm.Name;
-
-            int adjustmentsCount = rnd.Random(6) + 4;
-            Adjustments = new Adjustment[adjustmentsCount];
-            int h = (int)((BillingPeriodEnd - BillingPeriodStart).TotalHours / adjustmentsCount);
-
-            Adjustments[0] = Adjustment.CreateBalanceForward(rnd.RandomTime(BillingPeriodStart, 0, h), rnd.Random(10000));
-
-            int[] items = rnd.RandomList(adjustmentsCount - 1, 2);
-
-            for(int j = 1; j < Adjustments.Length; j++) {
-                DateTime nextDate = rnd.RandomTime(BillingPeriodStart.AddHours(h * j), 0, h);
-                    switch(items[j - 1]) {
-                        case 0:
-                            Adjustments[j] = Adjustment.CreateCharge(nextDate, rnd.Random(10000));
-                            break;
-                        case 1:
-                            Adjustments[j] = Adjustment.CreatePayment(nextDate, rnd.Random(10000));
-                            break;
-                    }
-            }
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Data/DataItemList.cs

@@ -1,70 +0,0 @@
-using System.Collections;
-
-namespace EnvelopeGenerator.ReceiverUI.Data {
-    public class DataItemList : IList<DataItem>, IList {
-        readonly int rowCount;
-
-        public DataItem this[int index] { get { return new DataItem(index); } set { } }
-        public int Count { get { return rowCount; } }
-        public bool IsReadOnly { get { return false; } }
-        public bool IsFixedSize { get { return false; } }
-        public object SyncRoot { get { return true; } }
-        public bool IsSynchronized { get { return true; } }
-        object IList.this[int index] { get { return new DataItem(index); } set { } }
-
-        public DataItemList(int rowCount) {
-            this.rowCount = rowCount;
-        }
-        public IEnumerator<DataItem> GetEnumerator() {
-            throw new NotImplementedException();
-        }
-        public int Add(object value) {
-            throw new NotImplementedException();
-        }
-        public bool Contains(object value) {
-            throw new NotImplementedException();
-        }
-        public void Clear() {
-            throw new NotImplementedException();
-        }
-        public int IndexOf(object value) {
-            throw new NotImplementedException();
-        }
-        public void Insert(int index, object value) {
-            throw new NotImplementedException();
-        }
-        public void Remove(object value) {
-            throw new NotImplementedException();
-        }
-        public void RemoveAt(int index) {
-            throw new NotImplementedException();
-        }
-        public void CopyTo(Array array, int index) {
-            throw new NotImplementedException();
-        }
-        IEnumerator IEnumerable.GetEnumerator() {
-            throw new NotImplementedException();
-        }
-        public int IndexOf(DataItem item) {
-            throw new NotImplementedException();
-        }
-        public void Insert(int index, DataItem item) {
-            throw new NotImplementedException();
-        }
-        public void Add(DataItem item) {
-            throw new NotImplementedException();
-        }
-        public bool Contains(DataItem item) {
-            throw new NotImplementedException();
-        }
-        public void CopyTo(DataItem[] array, int arrayIndex) {
-            throw new NotImplementedException();
-        }
-        public bool Remove(DataItem item) {
-            throw new NotImplementedException();
-        }
-        void ICollection<DataItem>.CopyTo(DataItem[] array, int arrayIndex) {
-            CopyTo(array, arrayIndex);
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Data/DeterministicRandom.cs

@@ -1,60 +0,0 @@
-namespace EnvelopeGenerator.ReceiverUI.Data {
-    class DeterministicRandom {
-        const int randomCount = 10000;
-        static readonly int[] deterministicRandomNumbers;
-        static readonly DateTime time;
-        int rnd;
-        int Next {
-            get {
-                rnd = deterministicRandomNumbers[rnd % randomCount];
-                return rnd;
-            }
-        }
-        public char RandomChar {
-            get {
-                return (char)((int)'A' + Random(0, 26));
-            }
-        }
-        public int[] RandomList(int count, int to) {
-            int[] res = new int[count];
-            for(int i = 0; i < Math.Min(count, to); i++)
-                res[i] = i;
-            for(int i = to; i < count; i++)
-                res[i] = Random(to);
-
-            for(int i = 0; i < count; i++) {
-                int ind = Random(count);
-                int temp = res[ind];
-                res[ind] = res[i];
-                res[i] = temp;
-            }
-            return res;
-        }
-        public int Random(int to) {
-            return Random(0, to);
-        }
-        public int Random(int from, int to) {
-            return Next % Math.Max(1, to - from) + from;
-        }
-        public T GetRandomItem<T>(IList<T> list) {
-            return list[Next % list.Count];
-        }
-        public DateTime RandomTime() {
-            return RandomTime(time, 0, 30 * 24);
-        }
-        public DateTime RandomTime(DateTime from, int fromHours, int toHours) {
-            return from.AddHours(Next % (toHours - fromHours) + fromHours);
-        }
-
-        static DeterministicRandom() {
-            time = DateTime.Now.AddDays(-62);
-            Random currentRandom = new Random(randomCount);
-            deterministicRandomNumbers = new int[randomCount];
-            for(int i = 0; i < randomCount; i++)
-                deterministicRandomNumbers[i] = currentRandom.Next(randomCount);
-        }
-        public DeterministicRandom(int i) {
-            this.rnd = i + (i >> 10) + (i >> 20);
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Data/Term.cs

@@ -1,15 +0,0 @@
-namespace EnvelopeGenerator.ReceiverUI.Data {
-    public struct Term {
-        public static readonly Term[] Terms = new Term[] {
-            new Term("Payment seven days after invoice date" ),
-            new Term("Payment ten days after invoice date" ),
-            new Term("End of month" ),
-            new Term("21st of the month following invoice date" ),
-        };
-        readonly string currentName;
-        public string Name { get { return currentName; } }
-        public Term(string currentName) {
-            this.currentName = currentName;
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/EnvelopeGenerator.ReceiverUI.csproj

@@ -1,42 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <WasmBuildNative>true</WasmBuildNative>
-	<InvariantGlobalization>false</InvariantGlobalization>
-	<BlazorWebAssemblyLoadAllGlobalizationData>true</BlazorWebAssemblyLoadAllGlobalizationData>
-	  
-	<Nullable>enable</Nullable>
-	<PackageId>EnvelopeGenerator.ReceiverUI</PackageId>
-	<Authors>Digital Data GmbH</Authors>
-	<Company>Digital Data GmbH</Company>
-	<Product>EnvelopeGenerator.ReceiverUI</Product>
-	<PackageIcon>Assets\icon.ico</PackageIcon>
-	<PackageTags>digital data envelope generator web</PackageTags>
-	<Description>EnvelopeGenerator.ReceiverUI is a Blazor WebAssembly application developed to manage signing processes. It uses Entity Framework Core (EF Core) for database operations. The user interface for signing processes is developed with Razor View Engine (.cshtml files) and JavaScript under wwwroot, integrated with PSPDFKit. This integration allows users to view and sign documents seamlessly.</Description>
-	<Version>1.0.1</Version>
-	<!-- NuGet package version -->
-	<AssemblyVersion>1.0.1.0</AssemblyVersion>
-	<!-- Assembly version for API compatibility -->
-	<FileVersion>1.0.1.0</FileVersion>
-	<!-- Windows file version -->
-	<Copyright>Copyright © 2026 Digital Data GmbH. All rights reserved.</Copyright>
-	  
-  </PropertyGroup>
-  <ItemGroup>
-    <PackageReference Include="HarfBuzzSharp.NativeAssets.WebAssembly" Version="8.3.1.2" />
-    <PackageReference Include="SkiaSharp.NativeAssets.WebAssembly" Version="3.119.1" />
-    <PackageReference Include="SkiaSharp.Views.Blazor" Version="3.119.1" />
-    <NativeFileReference Include="$(HarfBuzzSharpStaticLibraryPath)\2.0.23\*.a" />
-  </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.11" />
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.11" PrivateAssets="all" />
-    <PackageReference Include="DevExpress.Drawing.Skia" Version="25.2.3" />
-    <PackageReference Include="DevExpress.Blazor.Reporting.JSBasedControls" Version="25.2.3" />
-    <PackageReference Include="DevExpress.Blazor.Reporting.Viewer" Version="25.2.3" />
-  </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Properties\PublishProfiles\" />
-  </ItemGroup>
-</Project>

EnvelopeGenerator.ReceiverUI/NOTICE.txt

@@ -1,12 +0,0 @@
-The following open source libraries are used and included within thеse sample/demonstration projects:
-
-Bootstrap (Open Source – MIT License)
-Copyright (c) 2011-2021 Twitter, Inc. / Copyright (c) 2011-2021 The Bootstrap Authors
-https://github.com/twbs/bootstrap/blob/main/LICENSE
-
-open-iconic (Open Source – MIT License and SIL Open Font License)
-Copyright (c) 2014 Waybury
-https://github.com/iconic/open-iconic/blob/master/ICON-LICENSE
-https://github.com/iconic/open-iconic/blob/master/FONT-LICENSE
-
-The open source libraries included in these sample/demonstration projects are done so pursuant to each individual open source library license and subject to the disclaimers and limitations on liability set forth in each open source library license.

EnvelopeGenerator.ReceiverUI/Pages/DocumentViewer.razor

@@ -1,5 +0,0 @@
-@page "/documentviewer"
-
-<DxDocumentViewer ReportName="LargeDatasetReport" CssClass="dx-blazor-reporting-container" Height="@null" Width="@null">
-    <DxDocumentViewerTabPanelSettings Width="340" />
-</DxDocumentViewer>

EnvelopeGenerator.ReceiverUI/Pages/Index.razor

@@ -1,40 +0,0 @@
-@page "/"
-@inject NavigationManager NavigationManager
-
-<div class="d-flex justify-content-center align-items-center" style="min-height: 70vh;">
-    <div class="card shadow-sm border-0" style="max-width: 560px; width: 100%;">
-        <div class="card-body p-5 text-center">
-            <div class="rounded-circle bg-primary bg-opacity-10 d-inline-flex align-items-center justify-content-center mb-4" style="width: 72px; height: 72px;">
-                <span class="oi oi-document text-primary" aria-hidden="true" style="font-size: 2rem;"></span>
-            </div>
-            <h2 class="mb-3">Empfänger-UI</h2>
-            <p class="text-muted mb-4">
-                Sie werden zur Empfänger-UI weitergeleitet. Bitte warten Sie einen Moment.
-            </p>
-
-            <DxLoadingPanel Visible="true"
-                            Text=""
-                            IndicatorVisible="false"
-                            IndicatorAreaVisible="false"
-                            IsContentBlocked="false"
-                            ApplyBackgroundShading="false">
-                <div class="d-flex flex-column align-items-center gap-3 py-3">
-                    <div class="spinner-border text-primary" role="status" style="width: 2rem; height: 2rem;">
-                        <span class="visually-hidden">Wird geladen...</span>
-                    </div>
-                    <div class="text-muted small">Weiterleitung wird vorbereitet...</div>
-                </div>
-            </DxLoadingPanel>
-        </div>
-    </div>
-</div>
-
-@code {
-    protected override async Task OnAfterRenderAsync(bool firstRender) {
-        if(!firstRender)
-            return;
-
-        await Task.Delay(1200);
-        NavigationManager.NavigateTo("/receiver");
-    }
-}

EnvelopeGenerator.ReceiverUI/Pages/ReportDesigner.razor

@@ -1,19 +0,0 @@
-@page "/sender"
-@using DevExpress.DataAccess.Json;
-@using EnvelopeGenerator.ReceiverUI.Services;
-
-<DxReportDesigner ReportName="LargeDatasetReport" CssClass="dx-blazor-reporting-container" Height="@null" Width="@null" AllowMDI="true" DataSources="DataSources">
-    <DxReportDesignerWizardSettings UseFullscreenWizard="true" />
-</DxReportDesigner>
-
-@code {
-    Dictionary<string, object> DataSources = new Dictionary<string, object>();
-    protected override async Task OnInitializedAsync() {
-        await base.OnInitializedAsync();
-        var connection = CustomDataSourceWizardJsonDataConnectionStorage.GetDefaultConnection();
-        JsonDataSource jsonDataSource = new JsonDataSource();
-        jsonDataSource.JsonSource = connection.GetJsonSource();
-        await jsonDataSource.FillAsync();
-        DataSources.Add("Northwind", jsonDataSource);
-    }
-}

EnvelopeGenerator.ReceiverUI/Pages/ReportViewer.razor

@@ -1,360 +0,0 @@
-@page "/receiver"
-@using System.Drawing
-@using DevExpress.Drawing
-@using DevExpress.Utils
-@using DevExpress.XtraPrinting
-@using DevExpress.XtraPrinting.Drawing
-@using XtraReport = DevExpress.XtraReports.UI.XtraReport
-@using BottomMarginBand = DevExpress.XtraReports.UI.BottomMarginBand
-@using XRLabel = DevExpress.XtraReports.UI.XRLabel
-@using XRPictureBox = DevExpress.XtraReports.UI.XRPictureBox
-@using XRControl = DevExpress.XtraReports.UI.XRControl
-@using ImageSizeMode = DevExpress.XtraPrinting.ImageSizeMode
-@using EnvelopeGenerator.ReceiverUI.Services;
-@inject IJSRuntime JSRuntime
-@inject InMemoryReportStorageWebExtension ReportStorage
-
-<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
-<link href="_content/DevExpress.Blazor.Reporting.Viewer/css/dx-blazor-reporting-components.bs5.css" rel="stylesheet" />
-
-<div class="receiver-page-layout">
-
-<div class="receiver-signature-panel">
-<div class="card m-3">
-    <div class="card-body">
-        <h5 class="card-title">Unterschrift</h5>
-        <p class="card-text text-muted mb-2">
-            @if(SignatureApplied) {
-                <span>Die Unterschrift wurde dem Bericht hinzugefuegt. Sie koennen die Unterschrift erneuern oder das signierte PDF exportieren.</span>
-            } else {
-                <span>Bitte fuegen Sie vor dem PDF-Export Ihre Unterschrift hinzu.</span>
-            }
-        </p>
-        @if(!string.IsNullOrWhiteSpace(SignatureValidationMessage)) {
-            <div class="text-danger mb-2">@SignatureValidationMessage</div>
-        }
-        <div class="d-flex gap-2 flex-wrap">
-            <button class="btn btn-primary" @onclick="OpenSignaturePopupAsync">
-                @(SignatureApplied ? "Unterschrift erneuern" : "Unterschrift hinzufuegen")
-            </button>
-            <button class="btn btn-success" disabled="@(!SignatureApplied)" @onclick="ExportSignedPdfAsync">Signiertes PDF exportieren</button>
-        </div>
-    </div>
-</div>
-</div>
-
-<DxPopup @bind-Visible="SignaturePopupVisible"
-         HeaderText="Unterschrift erfassen"
-         Width="620px"
-         ShowFooter="true"
-         CloseOnEscape="true"
-         CloseOnOutsideClick="false">
-    <BodyContentTemplate>
-        <ul class="nav nav-tabs mb-3">
-            <li class="nav-item">
-                <button type="button" class="nav-link @(ActiveSignatureTab == SignatureTabDraw ? "active" : null)" @onclick="() => SetSignatureTabAsync(SignatureTabDraw)">Zeichnen</button>
-            </li>
-            <li class="nav-item">
-                <button type="button" class="nav-link @(ActiveSignatureTab == SignatureTabText ? "active" : null)" @onclick="() => SetSignatureTabAsync(SignatureTabText)">Text</button>
-            </li>
-            <li class="nav-item">
-                <button type="button" class="nav-link @(ActiveSignatureTab == SignatureTabImage ? "active" : null)" @onclick="() => SetSignatureTabAsync(SignatureTabImage)">Bild</button>
-            </li>
-        </ul>
-
-        @if(ActiveSignatureTab == SignatureTabDraw) {
-            <p class="text-muted mb-2">Bitte unterschreiben Sie im folgenden Feld.</p>
-            <canvas id="receiver-signature-pad" width="520" height="160" class="border rounded bg-white w-100" style="max-width: 520px; touch-action: none;"></canvas>
-        } else if(ActiveSignatureTab == SignatureTabText) {
-            <p class="text-muted mb-2">Geben Sie Ihre Unterschrift als Text ein und waehlen Sie eine Schriftart.</p>
-            <div class="row g-2 mb-2">
-                <div class="col-12 col-md-7">
-                    <input class="form-control" placeholder="Ihre Unterschrift" value="@TypedSignatureText" @oninput="OnTypedSignatureChanged" />
-                </div>
-                <div class="col-12 col-md-5">
-                    <select class="form-select" value="@TypedSignatureFont" @onchange="OnTypedSignatureFontChanged">
-                        @foreach(var font in TypedSignatureFonts) {
-                            <option value="@font.Value" style="font-family: @font.Value">@font.Text</option>
-                        }
-                    </select>
-                </div>
-            </div>
-            <canvas id="receiver-typed-signature-pad" width="520" height="160" class="border rounded bg-white w-100" style="max-width: 520px;"></canvas>
-        } else {
-            <p class="text-muted mb-2">Laden Sie ein Bild Ihrer Unterschrift hoch.</p>
-            <input id="receiver-signature-image-input" class="form-control mb-2" type="file" accept="image/png,image/jpeg,image/webp" />
-            <canvas id="receiver-image-signature-pad" width="520" height="160" class="border rounded bg-white w-100" style="max-width: 520px;"></canvas>
-        }
-
-
-        <div class="border-top mt-3 pt-3">
-            <p class="text-muted mb-2">Bitte geben Sie die folgenden Angaben ein. Das Datum wird automatisch hinzugefuegt.</p>
-            <div class="row g-2">
-                <div class="col-12 col-md-6">
-                    <label class="form-label" for="receiver-signer-name">Vor- und Nachname *</label>
-                    <input id="receiver-signer-name" class="form-control" value="@SignerFullName" @oninput="args => SignerFullName = args.Value?.ToString() ?? string.Empty" />
-                </div>
-                <div class="col-12 col-md-6">
-                    <label class="form-label" for="receiver-signer-position">Position</label>
-                    <input id="receiver-signer-position" class="form-control" value="@SignerPosition" @oninput="args => SignerPosition = args.Value?.ToString() ?? string.Empty" />
-                </div>
-                <div class="col-12 col-md-6">
-                    <label class="form-label" for="receiver-signature-place">Ort *</label>
-                    <input id="receiver-signature-place" class="form-control" value="@SignaturePlace" @oninput="args => SignaturePlace = args.Value?.ToString() ?? string.Empty" />
-                </div>
-            </div>
-        </div>
-
-        @if(!string.IsNullOrWhiteSpace(PopupValidationMessage)) {
-            <div class="text-danger mt-2">@PopupValidationMessage</div>
-        }
-    </BodyContentTemplate>
-    <FooterContentTemplate>
-        <div class="d-flex gap-2 flex-wrap justify-content-end w-100">
-            <button class="btn btn-outline-secondary" @onclick="RenewSignatureAsync">Unterschrift erneuern</button>
-            <button class="btn btn-primary" @onclick="ApplySignatureAsync">Zum Bericht hinzufuegen</button>
-            <button class="btn btn-secondary" @onclick="CloseSignaturePopup">Schliessen</button>
-        </div>
-    </FooterContentTemplate>
-</DxPopup>
-
-<div class="receiver-viewer-wrapper">
-@if(Report is not null) {
-    <DxReportViewer @key="ViewerKey" @ref="reportViewer" Report="Report" RootCssClasses="w-100 h-100" />
-}
-</div>
-
-</div>
-
-@code {
-    const string SignatureTabDraw = "draw";
-    const string SignatureTabText = "text";
-    const string SignatureTabImage = "image";
-    const string DrawCanvasId = "receiver-signature-pad";
-    const string TypedCanvasId = "receiver-typed-signature-pad";
-    const string ImageInputId = "receiver-signature-image-input";
-    const string ImageCanvasId = "receiver-image-signature-pad";
-
-    readonly (string Text, string Value)[] TypedSignatureFonts = {
-        ("Brush Script", "'Brush Script MT', cursive"),
-        ("Segoe Script", "'Segoe Script', cursive"),
-        ("Lucida Handwriting", "'Lucida Handwriting', cursive"),
-        ("Comic Sans", "'Comic Sans MS', cursive"),
-        ("Cursive", "cursive")
-    };
-
-    DxReportViewer reportViewer;
-    XtraReport? Report;
-    bool SignatureApplied;
-    bool SignaturePopupVisible;
-    string? SignatureValidationMessage;
-    string? PopupValidationMessage;
-    string ActiveSignatureTab = SignatureTabDraw;
-    string TypedSignatureText = string.Empty;
-    string TypedSignatureFont = "'Brush Script MT', cursive";
-    string SignerFullName = string.Empty;
-    string SignerPosition = string.Empty;
-    string SignaturePlace = string.Empty;
-    int ViewerKey;
-
-    protected override async Task OnInitializedAsync() {
-        Report = CreateReportInstance();
-
-        await Task.CompletedTask;
-    }
-
-    async Task OpenSignaturePopupAsync() {
-        ActiveSignatureTab = SignatureTabDraw;
-        SignaturePopupVisible = true;
-        SignatureValidationMessage = null;
-        PopupValidationMessage = null;
-        await InvokeAsync(StateHasChanged);
-        await Task.Delay(50);
-        await InitializeActiveSignatureTabAsync();
-    }
-
-    async Task SetSignatureTabAsync(string tab) {
-        ActiveSignatureTab = tab;
-        PopupValidationMessage = null;
-        await InvokeAsync(StateHasChanged);
-        await Task.Delay(50);
-        await InitializeActiveSignatureTabAsync();
-    }
-
-    async Task InitializeActiveSignatureTabAsync() {
-        if(ActiveSignatureTab == SignatureTabDraw) {
-            await JSRuntime.InvokeVoidAsync("receiverSignature.initialize", DrawCanvasId);
-        } else if(ActiveSignatureTab == SignatureTabText) {
-            await JSRuntime.InvokeVoidAsync("receiverSignature.initializeTyped", TypedCanvasId);
-            await RenderTypedSignatureAsync();
-        } else {
-            await JSRuntime.InvokeVoidAsync("receiverSignature.initializeImage", ImageInputId, ImageCanvasId);
-        }
-    }
-
-    async Task RenewSignatureAsync() {
-        PopupValidationMessage = null;
-
-        if(ActiveSignatureTab == SignatureTabDraw) {
-            await JSRuntime.InvokeVoidAsync("receiverSignature.clear", DrawCanvasId);
-        } else if(ActiveSignatureTab == SignatureTabText) {
-            TypedSignatureText = string.Empty;
-            await JSRuntime.InvokeVoidAsync("receiverSignature.clearTyped", TypedCanvasId);
-        } else {
-            await JSRuntime.InvokeVoidAsync("receiverSignature.clearImage", ImageInputId, ImageCanvasId);
-        }
-    }
-
-    void CloseSignaturePopup() {
-        PopupValidationMessage = null;
-        SignaturePopupVisible = false;
-    }
-
-    async Task OnTypedSignatureChanged(Microsoft.AspNetCore.Components.ChangeEventArgs args) {
-        TypedSignatureText = args.Value?.ToString() ?? string.Empty;
-        await RenderTypedSignatureAsync();
-    }
-
-    async Task OnTypedSignatureFontChanged(Microsoft.AspNetCore.Components.ChangeEventArgs args) {
-        TypedSignatureFont = args.Value?.ToString() ?? TypedSignatureFont;
-        await RenderTypedSignatureAsync();
-    }
-
-    async Task RenderTypedSignatureAsync() {
-        await JSRuntime.InvokeVoidAsync("receiverSignature.renderTypedSignature", TypedCanvasId, TypedSignatureText, TypedSignatureFont);
-    }
-
-    async Task ApplySignatureAsync() {
-        if(string.IsNullOrWhiteSpace(SignerFullName)) {
-            PopupValidationMessage = "Bitte geben Sie Vor- und Nachname ein.";
-            return;
-        }
-
-        if(string.IsNullOrWhiteSpace(SignaturePlace)) {
-            PopupValidationMessage = "Bitte geben Sie den Ort ein.";
-            return;
-        }
-
-        var signatureDataUrl = await GetActiveSignatureDataUrlAsync();
-
-        if(string.IsNullOrWhiteSpace(signatureDataUrl)) {
-            PopupValidationMessage = "Die Unterschrift ist fuer den PDF-Export erforderlich.";
-            return;
-        }
-
-        PopupValidationMessage = null;
-        SignatureValidationMessage = null;
-        Report = CreateSignedReportInstance(signatureDataUrl, SignerFullName.Trim(), SignerPosition.Trim(), SignaturePlace.Trim());
-        SignatureApplied = true;
-        SignaturePopupVisible = false;
-        ViewerKey++;
-    }
-
-    async Task<string?> GetActiveSignatureDataUrlAsync() {
-        if(ActiveSignatureTab == SignatureTabDraw)
-            return await JSRuntime.InvokeAsync<string?>("receiverSignature.getDataUrl", DrawCanvasId);
-
-        if(ActiveSignatureTab == SignatureTabText) {
-            await RenderTypedSignatureAsync();
-            return await JSRuntime.InvokeAsync<string?>("receiverSignature.getTypedDataUrl", TypedCanvasId);
-        }
-
-        return await JSRuntime.InvokeAsync<string?>("receiverSignature.getImageDataUrl", ImageCanvasId);
-    }
-
-    async Task ExportSignedPdfAsync() {
-        if(!SignatureApplied || Report is null) {
-            SignatureValidationMessage = "Bitte fuegen Sie die Unterschrift zuerst zum Bericht hinzu.";
-            return;
-        }
-
-        try {
-            SignatureValidationMessage = null;
-            await reportViewer.ExportToAsync(ExportFormat.Pdf);
-        } catch(Exception) {
-            SignatureValidationMessage = "Das signierte PDF konnte nicht exportiert werden. Bitte laden Sie die Seite neu und versuchen Sie es erneut.";
-        }
-    }
-
-    XtraReport CreateReportInstance() {
-        return ReportStorage.TryGetReport("LargeDatasetReport", out var savedReport)
-            ? savedReport
-            : PredefinedReports.ReportsFactory.GetReport("LargeDatasetReport");
-    }
-
-    XtraReport CreateSignedReportInstance(string signatureDataUrl, string signerFullName, string signerPosition, string signaturePlace) {
-        var report = CreateReportInstance();
-        AddSignature(report, signatureDataUrl, signerFullName, signerPosition, signaturePlace);
-        return report;
-    }
-
-    static void AddSignature(XtraReport report, string signatureDataUrl, string signerFullName, string signerPosition, string signaturePlace) {
-        var imageBytes = Convert.FromBase64String(signatureDataUrl[(signatureDataUrl.IndexOf(',') + 1)..]);
-        using var imageStream = new MemoryStream(imageBytes);
-        var imageSource = new ImageSource(DXImage.FromStream(imageStream));
-        var bottomMargin = report.Bands.OfType<BottomMarginBand>().FirstOrDefault();
-
-        if(bottomMargin is null) {
-            bottomMargin = new BottomMarginBand();
-            report.Bands.Add(bottomMargin);
-        }
-
-        RemoveExistingSignature(bottomMargin);
-
-        // Layout constants
-        const float sigX         = 390F;
-        const float sigWidth     = 230F;
-        const float sigImgHeight = 70F;
-        const float infoHeight   = 65F;  // up to 4 lines at 8pt
-        const float innerGap     = 5F;
-        const float bottomPad    = 6F;
-        const float defaultTopPad = 8F;
-        const float maxBandHeight = 210F;
-
-        float requiredHeight = defaultTopPad + sigImgHeight + innerGap + infoHeight + bottomPad;
-
-        // Grow band if needed, but cap at maxBandHeight to avoid overlapping page content
-        bottomMargin.HeightF = Math.Min(maxBandHeight, Math.Max(bottomMargin.HeightF, requiredHeight));
-
-        // If band is tighter than required, compress top padding so content still fits
-        float topPad = Math.Max(0F, bottomMargin.HeightF - bottomPad - infoHeight - innerGap - sigImgHeight);
-
-        float imageY = topPad;
-        float labelY = imageY + sigImgHeight + innerGap;
-
-        var signatureInformation = string.IsNullOrWhiteSpace(signerPosition)
-            ? $"Empfaengerunterschrift\n{signerFullName}\n{signaturePlace}, {DateTime.Now:d}"
-            : $"Empfaengerunterschrift\n{signerFullName}\n{signerPosition}\n{signaturePlace}, {DateTime.Now:d}";
-
-        var signature = new XRPictureBox {
-            Name = "receiverSignatureImage",
-            ImageSource = imageSource,
-            BoundsF = new RectangleF(sigX, imageY, sigWidth, sigImgHeight),
-            Sizing = ImageSizeMode.ZoomImage,
-            Borders = BorderSide.Bottom,
-            BorderColor = System.Drawing.Color.FromArgb(73, 80, 87)
-        };
-
-        var signatureLabel = new XRLabel {
-            Name = "receiverSignatureLabel",
-            Text = signatureInformation,
-            Multiline = true,
-            BoundsF = new RectangleF(sigX, labelY, sigWidth, infoHeight),
-            Font = new DXFont("Open Sans", 8F, DXFontStyle.Regular),
-            ForeColor = System.Drawing.Color.FromArgb(73, 80, 87),
-            TextAlignment = TextAlignment.TopLeft
-        };
-
-        bottomMargin.Controls.AddRange(new XRControl[] { signature, signatureLabel });
-    }
-
-    static void RemoveExistingSignature(BottomMarginBand bottomMargin) {
-        var controls = bottomMargin.Controls
-            .Cast<XRControl>()
-            .Where(control => control.Name is "receiverSignatureLabel" or "receiverSignatureImage")
-            .ToArray();
-
-        foreach(var control in controls)
-            bottomMargin.Controls.Remove(control);
-    }
-}

EnvelopeGenerator.ReceiverUI/PredefinedReports/Report.resx

@@ -1,123 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<root>
-  <!-- 
-    Microsoft ResX Schema 
-    
-    Version 2.0
-    
-    The primary goals of this format is to allow a simple XML format 
-    that is mostly human readable. The generation and parsing of the 
-    various data types are done through the TypeConverter classes 
-    associated with the data types.
-    
-    Example:
-    
-    ... ado.net/XML headers & schema ...
-    <resheader name="resmimetype">text/microsoft-resx</resheader>
-    <resheader name="version">2.0</resheader>
-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
-        <value>[base64 mime encoded serialized .NET Framework object]</value>
-    </data>
-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
-        <comment>This is a comment</comment>
-    </data>
-                
-    There are any number of "resheader" rows that contain simple 
-    name/value pairs.
-    
-    Each data row contains a name, and value. The row also contains a 
-    type or mimetype. Type corresponds to a .NET class that support 
-    text/value conversion through the TypeConverter architecture. 
-    Classes that don't support this are serialized and stored with the 
-    mimetype set.
-    
-    The mimetype is used for serialized objects, and tells the 
-    ResXResourceReader how to depersist the object. This is currently not 
-    extensible. For a given mimetype the value must be set accordingly:
-    
-    Note - application/x-microsoft.net.object.binary.base64 is the format 
-    that the ResXResourceWriter will generate, however the reader can 
-    read any of the formats listed below.
-    
-    mimetype: application/x-microsoft.net.object.binary.base64
-    value   : The object must be serialized with 
-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
-            : and then encoded with base64 encoding.
-    
-    mimetype: application/x-microsoft.net.object.soap.base64
-    value   : The object must be serialized with 
-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
-            : and then encoded with base64 encoding.
-
-    mimetype: application/x-microsoft.net.object.bytearray.base64
-    value   : The object must be serialized into a byte array 
-            : using a System.ComponentModel.TypeConverter
-            : and then encoded with base64 encoding.
-    -->
-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
-    <xsd:element name="root" msdata:IsDataSet="true">
-      <xsd:complexType>
-        <xsd:choice maxOccurs="unbounded">
-          <xsd:element name="metadata">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" />
-              </xsd:sequence>
-              <xsd:attribute name="name" use="required" type="xsd:string" />
-              <xsd:attribute name="type" type="xsd:string" />
-              <xsd:attribute name="mimetype" type="xsd:string" />
-              <xsd:attribute ref="xml:space" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="assembly">
-            <xsd:complexType>
-              <xsd:attribute name="alias" type="xsd:string" />
-              <xsd:attribute name="name" type="xsd:string" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="data">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
-              <xsd:attribute ref="xml:space" />
-            </xsd:complexType>
-          </xsd:element>
-          <xsd:element name="resheader">
-            <xsd:complexType>
-              <xsd:sequence>
-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
-              </xsd:sequence>
-              <xsd:attribute name="name" type="xsd:string" use="required" />
-            </xsd:complexType>
-          </xsd:element>
-        </xsd:choice>
-      </xsd:complexType>
-    </xsd:element>
-  </xsd:schema>
-  <resheader name="resmimetype">
-    <value>text/microsoft-resx</value>
-  </resheader>
-  <resheader name="version">
-    <value>2.0</value>
-  </resheader>
-  <resheader name="reader">
-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-  <resheader name="writer">
-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-  </resheader>
-  <metadata name="objectDataSource1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
-    <value>17, 17</value>
-  </metadata>
-</root>

EnvelopeGenerator.ReceiverUI/PredefinedReports/ReportsFactory.cs

@@ -1,14 +0,0 @@
-using DevExpress.XtraReports.UI;
-
-namespace EnvelopeGenerator.ReceiverUI.PredefinedReports {
-    public static class ReportsFactory
-    {
-        public static readonly Dictionary<string, Func<XtraReport>> Reports = new() {
-            ["LargeDatasetReport"] = () => new PredefinedReports.Report()
-        };
-
-        public static XtraReport GetReport(string reportName) {
-            return Reports[reportName]();
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Program.cs

@@ -1,32 +0,0 @@
-using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
-using Microsoft.AspNetCore.Components.Web;
-using EnvelopeGenerator.ReceiverUI;
-using DevExpress.DataAccess.Web;
-using EnvelopeGenerator.ReceiverUI.Services;
-using DevExpress.XtraReports.Services;
-using DevExpress.Blazor.Reporting;
-using DevExpress.XtraReports.Web.Extensions;
-
-var builder = WebAssemblyHostBuilder.CreateDefault(args);
-builder.RootComponents.Add<App>("#app");
-builder.RootComponents.Add<HeadOutlet>("head::after");
-builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
-
-builder.Services.AddDevExpressWebAssemblyBlazorReportViewer();
-
-builder.Services.AddDevExpressBlazorReportingWebAssembly(configure => {
-    configure.UseDevelopmentMode();
-});
-builder.Services.AddScoped<IDataSourceWizardJsonConnectionStorage, CustomDataSourceWizardJsonDataConnectionStorage>();
-builder.Services.AddScoped<IJsonDataConnectionProviderFactory, CustomJsonDataConnectionProviderFactory>();
-builder.Services.AddScoped<IObjectDataSourceWizardTypeProvider, ObjectDataSourceWizardCustomTypeProvider>();
-DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EnvelopeGenerator.ReceiverUI.Data.DataItemList));
-DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EnvelopeGenerator.ReceiverUI.PredefinedReports.Report));
-builder.Services.AddSingleton<InMemoryReportStorageWebExtension>();
-builder.Services.AddSingleton<ReportStorageWebExtension>(sp => sp.GetRequiredService<InMemoryReportStorageWebExtension>());
-builder.Services.AddScoped<IReportProviderAsync, CustomReportProvider>();
-ReportStorageWebExtension.RegisterExtensionGlobal(new InMemoryReportStorageWebExtension());
-
-var host = builder.Build();
-await FontLoader.LoadFonts(host.Services.GetRequiredService<HttpClient>(), new List<string> { "opensans.ttf" });
-await host.RunAsync();

EnvelopeGenerator.ReceiverUI/Properties/PublishProfiles/IISProfile.pubxml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- https://go.microsoft.com/fwlink/?LinkID=208121. -->
-<Project>
-  <PropertyGroup>
-    <WebPublishMethod>Package</WebPublishMethod>
-    <LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
-    <LastUsedPlatform>Any CPU</LastUsedPlatform>
-    <SiteUrlToLaunchAfterPublish />
-    <LaunchSiteAfterPublish>true</LaunchSiteAfterPublish>
-    <ExcludeApp_Data>false</ExcludeApp_Data>
-    <ProjectGuid>fb2d306b-1042-4a70-31ed-f991a1599371</ProjectGuid>
-    <DesktopBuildPackageLocation>M:\App&amp;Service\0 DD - Smart UP\signFLOW\ReceiverUI\net8\$(Version)\EnvelopeGenerator.ReceiverUI.zip</DesktopBuildPackageLocation>
-    <PackageAsSingleFile>true</PackageAsSingleFile>
-    <DeployIisAppPath>EnvelopeGenerator.ReceiverUI</DeployIisAppPath>
-    <_TargetId>IISWebDeployPackage</_TargetId>
-  </PropertyGroup>
-</Project>

EnvelopeGenerator.ReceiverUI/Properties/launchSettings.json

@@ -1,12 +0,0 @@
-{
-  "profiles": {
-    "EnvelopeGenerator.ReceiverUI": {
-      "commandName": "Project",
-      "launchBrowser": true,
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      },
-      "applicationUrl": "https://localhost:52936;http://localhost:52937"
-    }
-  }
-}

EnvelopeGenerator.ReceiverUI/Services/CustomDataSourceWizardJsonDataConnectionStorage.cs

@@ -1,40 +0,0 @@
-using DevExpress.DataAccess.Json;
-using DevExpress.DataAccess.Web;
-using DevExpress.DataAccess.Wizard.Services;
-
-namespace EnvelopeGenerator.ReceiverUI.Services
-{
-    public class CustomDataSourceWizardJsonDataConnectionStorage : IDataSourceWizardJsonConnectionStorage
-    {
-        public static JsonDataConnection GetDefaultConnection() {
-            var uriJsonSource = new UriJsonSource() {
-                Uri = new Uri(@"https://raw.githubusercontent.com/DevExpress-Examples/DataSources/master/JSON/customers.json"),
-            };
-            return new JsonDataConnection(uriJsonSource) { StoreConnectionNameOnly = true, Name = "NWindProductsJson" };
-        }
-        public static List<JsonDataConnection> GetConnections() {
-            var connections = new List<JsonDataConnection> {
-                GetDefaultConnection()
-            };
-            return connections;
-        }
-
-        bool IJsonConnectionStorageService.CanSaveConnection => false;
-        bool IJsonConnectionStorageService.ContainsConnection(string connectionName) {
-            return GetConnections().Any(x => x.Name == connectionName);
-        }
-
-        IEnumerable<JsonDataConnection> IJsonConnectionStorageService.GetConnections() {
-            return GetConnections();
-        }
-
-        JsonDataConnection IJsonDataConnectionProviderService.GetJsonDataConnection(string name) {
-            var connection = GetConnections().FirstOrDefault(x => x.Name == name);
-            if(connection == null)
-                throw new InvalidOperationException();
-            return connection;
-        }
-
-        void IJsonConnectionStorageService.SaveConnection(string connectionName, JsonDataConnection connection, bool saveCredentials) { }
-    }
-}

EnvelopeGenerator.ReceiverUI/Services/CustomJsonDataConnectionProviderFactory.cs

@@ -1,24 +0,0 @@
-using DevExpress.DataAccess.Json;
-using DevExpress.DataAccess.Web;
-namespace EnvelopeGenerator.ReceiverUI.Services
-{
-    public class CustomJsonDataConnectionProviderFactory : IJsonDataConnectionProviderFactory {
-        public IJsonDataConnectionProviderService Create() {
-            return new WebDocumentViewerJsonDataConnectionProvider(CustomDataSourceWizardJsonDataConnectionStorage.GetConnections());
-        }
-    }
-
-    public class WebDocumentViewerJsonDataConnectionProvider : IJsonDataConnectionProviderService
-    {
-        readonly List<JsonDataConnection> jsonDataConnections;
-        public WebDocumentViewerJsonDataConnectionProvider(List<JsonDataConnection> jsonDataConnections) {
-            this.jsonDataConnections = jsonDataConnections;
-        }
-        public JsonDataConnection GetJsonDataConnection(string name) {
-            var connection = jsonDataConnections.FirstOrDefault(x => x.Name == name);
-            if(connection == null)
-                throw new InvalidOperationException();
-            return connection;
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Services/CustomReportProvider.cs

@@ -1,21 +0,0 @@
-using DevExpress.XtraReports.UI;
-using DevExpress.XtraReports.Services;
-using EnvelopeGenerator.ReceiverUI.PredefinedReports;
-
-namespace EnvelopeGenerator.ReceiverUI.Services
-{
-    public class CustomReportProvider : IReportProviderAsync {
-        private readonly InMemoryReportStorageWebExtension reportStorage;
-
-        public CustomReportProvider(InMemoryReportStorageWebExtension reportStorage) {
-            this.reportStorage = reportStorage;
-        }
-
-        public Task<XtraReport> GetReportAsync(string id, ReportProviderContext context) {
-            if(reportStorage.TryGetReport(id, out var savedReport))
-                return Task.FromResult(savedReport);
-
-            return Task.FromResult(ReportsFactory.GetReport(id));
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Services/FontLoader.cs

@@ -1,12 +0,0 @@
-using DevExpress.Drawing;
-
-namespace EnvelopeGenerator.ReceiverUI.Services {
-    public static class FontLoader {
-        public async static Task LoadFonts(HttpClient httpClient, List<string> fontNames) {
-            foreach(var fontName in fontNames) {
-                var fontBytes = await httpClient.GetByteArrayAsync($"fonts/{fontName}");
-                DXFontRepository.Instance.AddFont(fontBytes);
-            }
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Services/InMemoryReportStorageWebExtension.cs

@@ -1,83 +0,0 @@
-using DevExpress.XtraReports.UI;
-using DevExpress.XtraReports.Web.Extensions;
-using EnvelopeGenerator.ReceiverUI.PredefinedReports;
-
-namespace EnvelopeGenerator.ReceiverUI.Services;
-
-public class InMemoryReportStorageWebExtension : ReportStorageWebExtension
-{
-    private const string DefaultReportName = "LargeDatasetReport";
-    private static readonly Dictionary<string, byte[]> Reports = new(StringComparer.OrdinalIgnoreCase);
-
-    public override bool CanSetData(string url) => IsValidUrl(url);
-
-    public override byte[] GetData(string url)
-    {
-        url = NormalizeUrl(url);
-
-        if (Reports.TryGetValue(url, out var reportLayout))
-            return reportLayout;
-
-        if (ReportsFactory.Reports.TryGetValue(url, out var reportFactory))
-            return SaveReport(reportFactory());
-
-        throw new DevExpress.XtraReports.Web.ClientControls.FaultException($"Report '{url}' was not found.");
-    }
-
-    public override Dictionary<string, string> GetUrls()
-    {
-        var urls = ReportsFactory.Reports.Keys
-            .Concat(Reports.Keys)
-            .Distinct(StringComparer.OrdinalIgnoreCase)
-            .ToDictionary(name => name, name => name, StringComparer.OrdinalIgnoreCase);
-
-        return urls;
-    }
-
-    public override bool IsValidUrl(string url)
-    {
-        return !string.IsNullOrWhiteSpace(url)
-            && url.IndexOfAny(Path.GetInvalidFileNameChars()) < 0;
-    }
-
-    public override void SetData(XtraReport report, string url)
-    {
-        url = NormalizeUrl(url);
-        Reports[url] = SaveReport(report);
-    }
-
-    public override string SetNewData(XtraReport report, string defaultUrl)
-    {
-        var url = NormalizeUrl(defaultUrl);
-        Reports[url] = SaveReport(report);
-        return url;
-    }
-
-    public bool TryGetReport(string url, out XtraReport report)
-    {
-        url = NormalizeUrl(url);
-
-        if (!Reports.ContainsKey(url))
-        {
-            report = null!;
-            return false;
-        }
-
-        using var stream = new MemoryStream(Reports[url]);
-        report = XtraReport.FromXmlStream(stream, true);
-        report.Name = url;
-        return true;
-    }
-
-    private static string NormalizeUrl(string url)
-    {
-        return string.IsNullOrWhiteSpace(url) ? DefaultReportName : url;
-    }
-
-    private static byte[] SaveReport(XtraReport report)
-    {
-        using var stream = new MemoryStream();
-        report.SaveLayoutToXml(stream);
-        return stream.ToArray();
-    }
-}

EnvelopeGenerator.ReceiverUI/Services/ObjectDataSourceWizardCustomTypeProvider.cs

@@ -1,9 +0,0 @@
-using DevExpress.DataAccess.Web;
-
-namespace EnvelopeGenerator.ReceiverUI.Services {
-    public class ObjectDataSourceWizardCustomTypeProvider : IObjectDataSourceWizardTypeProvider {
-        public IEnumerable<Type> GetAvailableTypes(string context) {
-            return new[] { typeof(Data.DataItemList) };
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Shared/Header.razor

@@ -1,21 +0,0 @@
-<nav class="navbar header-navbar p-0">
-    <button class="navbar-toggler bg-primary d-block" @onclick="OnToggleClick">
-        <span class="navbar-toggler-icon"></span>
-    </button>
-    <div class="ms-3 fw-bold title pe-4">EnvelopeGenerator.ReceiverUI</div>
-</nav>
-
-@code {
-    [Parameter] public bool ToggleOn { get; set; }
-    [Parameter] public EventCallback<bool> ToggleOnChanged { get; set; }
-
-    async Task OnToggleClick() => await Toggle();
-
-    async Task Toggle(bool? value = null) {
-        var newValue = value ?? !ToggleOn;
-        if(ToggleOn != newValue) {
-            ToggleOn = newValue;
-            await ToggleOnChanged.InvokeAsync(ToggleOn);
-        }
-    }
-}

EnvelopeGenerator.ReceiverUI/Shared/Header.razor.css

@@ -1,39 +0,0 @@
-.navbar.header-navbar {
-    flex-grow: 0;
-    flex-wrap: nowrap;
-    border: none;
-    background-color: inherit;
-    border-radius: 0;
-    height: 3.5rem;
-    min-height: 3.5rem;
-    box-shadow: 0px 2px 6px 0px rgba(0, 0, 0, 0.12);
-    justify-content: flex-start;
-}
-
-.header-navbar .navbar-toggler {
-    outline: none;
-    border-radius: 0;
-    padding-left: .75rem;
-    padding-right: .75rem;
-    box-shadow: none;
-    align-self: stretch;
-}
-
-.header-navbar .navbar-toggler .navbar-toggler-icon {
-    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(255,255,255, 1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 8h24M4 16h24M4 24h24'/%3E%3C/svg%3E");
-    background-color: transparent !important;
-    height: 2rem;
-    width: 2rem;
-}
-
-.title {
-    font-size: 1.1rem;
-    text-overflow: ellipsis;
-    overflow: hidden;
-}
-
-@media (max-width: 350px) {
-    .title {
-        font-size: inherit;
-    }
-}

EnvelopeGenerator.ReceiverUI/Shared/MainLayout.razor

@@ -1,26 +0,0 @@
-@using EnvelopeGenerator.ReceiverUI.Services;
-@inherits LayoutComponentBase
-
-<div class="page">
-<main>
-        <div class="top-row px-4">
-            <a href="https://docs.microsoft.com/aspnet/" target="_blank">About</a>
-        </div>
-
-        <article class="content">
-            @Body
-        </article>
-    </main>
-</div>
-
-@code {
-    [Inject] HttpClient Http { get; set; }
-    List<string> RequiredFonts = new() {
-        "opensans.ttf"
-    };
-
-    protected async override Task OnInitializedAsync() {
-        await FontLoader.LoadFonts(Http, RequiredFonts);
-        await base.OnInitializedAsync();
-    }
-}

EnvelopeGenerator.ReceiverUI/Shared/MainLayout.razor.css

@@ -1,81 +0,0 @@
-.page {
-    position: relative;
-    display: flex;
-    flex-direction: column;
-    overflow: auto;
-}
-
-main {
-    flex: 1;
-}
-
-.sidebar {
-    background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
-}
-
-.top-row {
-    background-color: #f7f7f7;
-    border-bottom: 1px solid #d6d5d5;
-    justify-content: flex-end;
-    height: 3.5rem;
-    display: flex;
-    align-items: center;
-}
-
-    .top-row ::deep a, .top-row ::deep .btn-link {
-        white-space: nowrap;
-        margin-left: 1.5rem;
-        text-decoration: none;
-    }
-
-    .top-row ::deep a:hover, .top-row ::deep .btn-link:hover {
-        text-decoration: underline;
-    }
-
-    .top-row ::deep a:first-child {
-        overflow: hidden;
-        text-overflow: ellipsis;
-    }
-
-@media (max-width: 640.98px) {
-    .top-row:not(.auth) {
-        display: none;
-    }
-
-    .top-row.auth {
-        justify-content: space-between;
-    }
-
-    .top-row ::deep a, .top-row ::deep .btn-link {
-        margin-left: 0;
-    }
-}
-
-@media (min-width: 641px) {
-    .page {
-        flex-direction: row;
-    }
-
-    .sidebar {
-        width: 300px;
-        height: 100vh;
-        position: sticky;
-        top: 0;
-    }
-
-    .top-row {
-        position: sticky;
-        top: 0;
-        z-index: 1;
-    }
-
-    .top-row.auth ::deep a:first-child {
-        flex: 1;
-        text-align: right;
-        width: 0;
-    }
-
-    .top-row, article {
-        padding: 2rem !important;
-    }
-}

EnvelopeGenerator.ReceiverUI/Shared/NavMenu.razor

@@ -1,46 +0,0 @@
-<div class="top-row ps-3 navbar navbar-dark">
-    <div class="container-fluid">
-        <a class="navbar-brand" href="">EnvelopeGenerator.ReceiverUI</a>
-        <button title="Navigation menu" class="navbar-toggler" @onclick="ToggleNavMenu">
-            <span class="navbar-toggler-icon"></span>
-        </button>
-    </div>
-</div>
-
-<div class="@NavMenuCssClass" @onclick="ToggleNavMenu">
-    <nav class="flex-column">
-        @*
-        <div class="nav-item px-3">
-            <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
-                <span class="oi oi-home" aria-hidden="true"></span> Home
-            </NavLink>
-        </div>
-        <div class="nav-item px-3">
-            <NavLink class="nav-link" href="documentviewer">
-                <span class="oi oi-plus" aria-hidden="true"></span> Document Viewer (JS-Based)
-            </NavLink>
-        </div>
-        *@
-        <div class="nav-item px-3">
-            <NavLink class="nav-link" href="receiver">
-                <span class="oi oi-plus" aria-hidden="true"></span> Empfänger-UI
-            </NavLink>
-        </div>
-        <div class="nav-item px-3">
-            <NavLink class="nav-link" href="sender">
-                <span class="oi oi-plus" aria-hidden="true"></span> Umschlag-UI
-            </NavLink>
-        </div>
-    </nav>
-</div>
-
-@code {
-    private bool collapseNavMenu = true;
-
-    private string NavMenuCssClass => collapseNavMenu ? "collapse" : null;
-
-    private void ToggleNavMenu()
-    {
-        collapseNavMenu = !collapseNavMenu;
-    }
-}

EnvelopeGenerator.ReceiverUI/Shared/NavMenu.razor.css

@@ -1,63 +0,0 @@
-.navbar-toggler {
-    background-color: rgba(255, 255, 255, 0.1);
-}
-
-.top-row {
-    height: 3.5rem;
-    background-color: rgba(0,0,0,0.4);
-}
-
-.navbar-brand {
-    font-size: 1.1rem;
-}
-
-.oi {
-    width: 2rem;
-    font-size: 1.1rem;
-    vertical-align: text-top;
-    top: -2px;
-}
-
-.nav-item {
-    font-size: 0.9rem;
-    padding-bottom: 0.5rem;
-}
-
-    .nav-item:first-of-type {
-        padding-top: 1rem;
-    }
-
-    .nav-item:last-of-type {
-        padding-bottom: 1rem;
-    }
-
-    .nav-item ::deep a {
-        color: #d7d7d7;
-        border-radius: 4px;
-        height: 3rem;
-        display: flex;
-        align-items: center;
-        line-height: 3rem;
-        white-space: nowrap;
-    }
-
-.nav-item ::deep a.active {
-    background-color: rgba(255,255,255,0.25);
-    color: white;
-}
-
-.nav-item ::deep a:hover {
-    background-color: rgba(255,255,255,0.1);
-    color: white;
-}
-
-@media (min-width: 641px) {
-    .navbar-toggler {
-        display: none;
-    }
-
-    .sidebar .collapse {
-        /* Never collapse the sidebar for wide screens */
-        display: block;
-    }
-}

EnvelopeGenerator.ReceiverUI/_Imports.razor

@@ -1,9 +0,0 @@
-@using System.Net.Http
-@using Microsoft.AspNetCore.Components.Forms
-@using Microsoft.AspNetCore.Components.Routing
-@using Microsoft.AspNetCore.Components.Web
-@using Microsoft.JSInterop
-@using EnvelopeGenerator.ReceiverUI
-@using EnvelopeGenerator.ReceiverUI.Shared
-@using DevExpress.Blazor.Reporting
-@using DevExpress.Blazor

EnvelopeGenerator.ReceiverUI/appsettings.Development.json

@@ -1,10 +0,0 @@
-{
-  "Logging": {
-    "IncludeScopes": false,
-    "LogLevel": {
-      "Default": "Information",
-      "System": "Information",
-      "Microsoft": "Information"
-    }
-  }
-}

EnvelopeGenerator.ReceiverUI/appsettings.json

@@ -1,10 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft": "Warning",
-      "Microsoft.Hosting.Lifetime": "Information",
-      "DevExpress": "Warning"
-    }
-  }
-}

EnvelopeGenerator.ReceiverUI/wwwroot/browserNotSupported.html

@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
-
-</head>
-<body>
-    <div class="d-flex flex-column justify-content-center align-items-center vh-100">
-        <div class="d-flex">
-            <img class="mt-2 me-4" src="images/sad.svg" width="60" height="60" />
-            <div>
-                <div class="h1">Your browser is not supported.</div>
-                <p style="font-size: 1rem; opacity: 0.75;" class="m-0">In .NET 5.0, Blazor does not support Microsoft Internet Explorer and Microsoft Edge Legacy (refer to <a target="_blank" href="https://docs.devexpress.com/Blazor/401588/common-concepts/supported-browsers">Supported Browsers</a>).<br />Please use a different browser to run EnvelopeGenerator.ReceiverUI.</p>
-            </div>
-        </div>
-    </div>
-</body>
-</html>

EnvelopeGenerator.ReceiverUI/wwwroot/css/app.css

@@ -1,73 +0,0 @@
-@import url('open-iconic/font/css/open-iconic-bootstrap.min.css');
-
-html, body {
-    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
-    padding: 0;
-}
-
-html, body {
-    height: 100%;
-    overflow: hidden;
-}
-
-article {
-    height: calc(100vh - 70px);
-    display: flex;
-    flex-direction: column;
-    overflow: hidden;
-    padding-left: 0 !important;
-    padding-right: 0 !important;
-}
-
-.receiver-page-layout {
-    display: flex;
-    flex-direction: column;
-    height: 100%;
-    overflow: hidden;
-}
-
-.receiver-signature-panel {
-    flex: 0 0 auto;
-}
-
-.receiver-viewer-wrapper {
-    flex: 1 1 0;
-    min-height: 0;
-    overflow: hidden;
-}
-
-.valid.modified:not([type=checkbox]) {
-    outline: 1px solid #26b050;
-}
-
-.invalid {
-    outline: 1px solid red;
-}
-
-.validation-message {
-    color: red;
-}
-
-#blazor-error-ui {
-    background: lightyellow;
-    bottom: 0;
-    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
-    display: none;
-    left: 0;
-    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
-    position: fixed;
-    width: 100%;
-    z-index: 1000;
-}
-
-#blazor-error-ui .dismiss {
-    cursor: pointer;
-    position: absolute;
-    right: 0.75rem;
-    top: 0.5rem;
-}
-
-.dx-blazor-reporting-container {
-    height: calc(100vh - 130px) !important;
-    width: 100% !important;
-}

EnvelopeGenerator.ReceiverUI/wwwroot/images/sad.svg

@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 24.1.1, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<svg version="1.1" id="_x31_" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 viewBox="0 0 62 62" style="enable-background:new 0 0 62 62;" xml:space="preserve">
-<style type="text/css">
-	.st0{fill-rule:evenodd;clip-rule:evenodd;}
-</style>
-<path id="_x32_" class="st0" d="M31,61C14.4,61,1,47.6,1,31S14.4,1,31,1s30,13.4,30,30S47.6,61,31,61z M31,5C16.6,5,5,16.6,5,31
-	s11.6,26,26,26s26-11.6,26-26S45.4,5,31,5z M52,34.5L49.5,37L46,33.5L42.5,37L40,34.5l3.5-3.5L40,27.5l2.5-2.5l3.5,3.5l3.5-3.5
-	l2.5,2.5L48.5,31L52,34.5z M43,44c0,1.1-0.9,2-2,2H21c-1.1,0-2-0.9-2-2s0.9-2,2-2h20C42.1,42,43,42.9,43,44z M19.5,37L16,33.5
-	L12.5,37L10,34.5l3.5-3.5L10,27.5l2.5-2.5l3.5,3.5l3.5-3.5l2.5,2.5L18.5,31l3.5,3.5L19.5,37z"/>
-</svg>

EnvelopeGenerator.ReceiverUI/wwwroot/index.html

@@ -1,69 +0,0 @@
-<!DOCTYPE html>
-<html>
-
-<head>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
-    <title>EnvelopeGenerator.ReceiverUI</title>
-    <base href="/" />
-    <link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />
-    <link href="EnvelopeGenerator.ReceiverUI.styles.css" rel="stylesheet" />
-    <link href="css/app.css" rel="stylesheet" />
-    <style type="text/css">
-        .splash-screen {
-            display: flex;
-            justify-content: center;
-            align-items: center;
-            flex-flow: column nowrap;
-            height: 100vh;
-            font-family: "Segoe UI",Roboto,"Helvetica Neue","-apple-system",BlinkMacSystemFont,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
-            font-size: .88rem;
-            font-weight: 400;
-            line-height: 1.5;
-            text-align: center;
-        }
-
-        .splash-screen .spinner-border {
-            border: .2em solid;
-            border-color: #5f368d #bfbfbf #bfbfbf;
-            width: 120px;
-            height: 120px;
-        }
-
-        .splash-screen-caption {
-            font-size: 1.5rem;
-            font-weight: 600;
-            margin-top: 1.5rem;
-        }
-
-        .splash-screen-text {
-            color: #a1a1a1;
-            margin-top: .5rem;
-        }
-    </style>
-</head>
-
-<body>
-    <div id="app">
-        <script type="text/javascript">
-            if(/MSIE \d|Trident.*rv:|Edge\//.test(window.navigator.userAgent))
-                window.location.href = "browserNotSupported.html";
-        </script>
-        <div class="splash-screen">
-            <div class="spinner-border"></div>
-            <div class="splash-screen-caption">EnvelopeGenerator.ReceiverUI</div>
-            <div class="splash-screen-text">Loading...</div>
-        </div>
-    </div>
-
-    <div id="blazor-error-ui">
-        An unhandled error has occurred.
-        <a href="" class="reload">Reload</a>
-        <a class="dismiss">X</a>
-    </div>
-    <script src="_content/DevExpress.Blazor.Resources/js/preload-script.js"></script>
-    <script src="js/receiver-signature.js"></script>
-    <script src="_framework/blazor.webassembly.js"></script>
-</body>
-
-</html>

EnvelopeGenerator.ReceiverUI/wwwroot/js/receiver-signature.js

@@ -1,221 +0,0 @@
-window.receiverSignature = (() => {
-    const pads = new Map();
-    const typedSignatures = new Map();
-    const imageSignatures = new Map();
-
-    function getPosition(canvas, event) {
-        const rect = canvas.getBoundingClientRect();
-        const source = event.touches && event.touches.length ? event.touches[0] : event;
-        return {
-            x: (source.clientX - rect.left) * (canvas.width / rect.width),
-            y: (source.clientY - rect.top) * (canvas.height / rect.height)
-        };
-    }
-
-    function clearCanvas(canvas) {
-        canvas.getContext('2d').clearRect(0, 0, canvas.width, canvas.height);
-    }
-
-    function initialize(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        if (!canvas || pads.has(canvasId))
-            return;
-
-        const context = canvas.getContext('2d');
-        context.lineWidth = 2.5;
-        context.lineCap = 'round';
-        context.lineJoin = 'round';
-        context.strokeStyle = '#111';
-
-        const state = { drawing: false, hasSignature: false };
-        pads.set(canvasId, state);
-
-        const start = event => {
-            event.preventDefault();
-            const pos = getPosition(canvas, event);
-            state.drawing = true;
-            context.beginPath();
-            context.moveTo(pos.x, pos.y);
-        };
-
-        const move = event => {
-            if (!state.drawing)
-                return;
-
-            event.preventDefault();
-            const pos = getPosition(canvas, event);
-            context.lineTo(pos.x, pos.y);
-            context.stroke();
-            state.hasSignature = true;
-        };
-
-        const end = event => {
-            if (!state.drawing)
-                return;
-
-            event.preventDefault();
-            state.drawing = false;
-        };
-
-        canvas.addEventListener('mousedown', start);
-        canvas.addEventListener('mousemove', move);
-        window.addEventListener('mouseup', end);
-        canvas.addEventListener('touchstart', start, { passive: false });
-        canvas.addEventListener('touchmove', move, { passive: false });
-        canvas.addEventListener('touchend', end, { passive: false });
-    }
-
-    function initializeTyped(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        if (!canvas || typedSignatures.has(canvasId))
-            return;
-
-        typedSignatures.set(canvasId, { hasSignature: false });
-    }
-
-    function initializeImage(inputId, canvasId) {
-        const input = document.getElementById(inputId);
-        const canvas = document.getElementById(canvasId);
-        if (!input || !canvas || imageSignatures.has(canvasId))
-            return;
-
-        const state = { hasSignature: false };
-        imageSignatures.set(canvasId, state);
-
-        input.addEventListener('change', () => {
-            const file = input.files && input.files.length ? input.files[0] : null;
-            if (!file || !file.type.startsWith('image/')) {
-                clearCanvas(canvas);
-                state.hasSignature = false;
-                return;
-            }
-
-            const reader = new FileReader();
-            reader.onload = () => {
-                const image = new Image();
-                image.onload = () => {
-                    const context = canvas.getContext('2d');
-                    clearCanvas(canvas);
-
-                    const padding = 10;
-                    const maxWidth = canvas.width - padding * 2;
-                    const maxHeight = canvas.height - padding * 2;
-                    const scale = Math.min(maxWidth / image.width, maxHeight / image.height, 1);
-                    const width = image.width * scale;
-                    const height = image.height * scale;
-                    const x = (canvas.width - width) / 2;
-                    const y = (canvas.height - height) / 2;
-
-                    context.drawImage(image, x, y, width, height);
-                    state.hasSignature = true;
-                };
-                image.src = reader.result;
-            };
-            reader.readAsDataURL(file);
-        });
-    }
-
-    function clear(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        const state = pads.get(canvasId);
-        if (!canvas || !state)
-            return;
-
-        clearCanvas(canvas);
-        state.hasSignature = false;
-    }
-
-    function clearTyped(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        const state = typedSignatures.get(canvasId);
-        if (!canvas || !state)
-            return;
-
-        clearCanvas(canvas);
-        state.hasSignature = false;
-    }
-
-    function clearImage(inputId, canvasId) {
-        const input = document.getElementById(inputId);
-        const canvas = document.getElementById(canvasId);
-        const state = imageSignatures.get(canvasId);
-        if (!canvas || !state)
-            return;
-
-        if (input)
-            input.value = '';
-
-        clearCanvas(canvas);
-        state.hasSignature = false;
-    }
-
-    function renderTypedSignature(canvasId, text, fontFamily) {
-        const canvas = document.getElementById(canvasId);
-        const state = typedSignatures.get(canvasId);
-        if (!canvas || !state)
-            return;
-
-        const value = (text || '').trim();
-        clearCanvas(canvas);
-
-        if (!value) {
-            state.hasSignature = false;
-            return;
-        }
-
-        const context = canvas.getContext('2d');
-        const maxWidth = canvas.width - 30;
-        let fontSize = 54;
-
-        do {
-            context.font = `italic ${fontSize}px ${fontFamily || 'cursive'}`;
-            fontSize -= 2;
-        } while (context.measureText(value).width > maxWidth && fontSize > 24);
-
-        context.fillStyle = '#111';
-        context.textBaseline = 'middle';
-        context.textAlign = 'center';
-        context.fillText(value, canvas.width / 2, canvas.height / 2);
-        state.hasSignature = true;
-    }
-
-    function getDataUrl(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        const state = pads.get(canvasId);
-        if (!canvas || !state || !state.hasSignature)
-            return null;
-
-        return canvas.toDataURL('image/png');
-    }
-
-    function getTypedDataUrl(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        const state = typedSignatures.get(canvasId);
-        if (!canvas || !state || !state.hasSignature)
-            return null;
-
-        return canvas.toDataURL('image/png');
-    }
-
-    function getImageDataUrl(canvasId) {
-        const canvas = document.getElementById(canvasId);
-        const state = imageSignatures.get(canvasId);
-        if (!canvas || !state || !state.hasSignature)
-            return null;
-
-        return canvas.toDataURL('image/png');
-    }
-
-    return {
-        initialize,
-        initializeTyped,
-        initializeImage,
-        clear,
-        clearTyped,
-        clearImage,
-        renderTypedSignature,
-        getDataUrl,
-        getTypedDataUrl,
-        getImageDataUrl
-    };
-})();

EnvelopeGenerator.sln

@@ -35,7 +35,11 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.Tests", "
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.API", "EnvelopeGenerator.API\EnvelopeGenerator.API.csproj", "{EC768913-6270-14F4-1DD3-69C87A659462}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.ReceiverUI", "EnvelopeGenerator.ReceiverUI\EnvelopeGenerator.ReceiverUI.csproj", "{FB2D306B-1042-4A70-31ED-F991A1599371}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "receiverUI", "receiverUI", "{73D8F466-90AA-4F95-9BD1-7CDBB8565162}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.ReceiverUI.Web", "receiverUI\EnvelopeGenerator.ReceiverUI.Web\EnvelopeGenerator.ReceiverUI.Web\EnvelopeGenerator.ReceiverUI.Web.csproj", "{AAD4720E-D175-44B5-B431-DB0BA636CD20}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.ReceiverUI.Web.Client", "receiverUI\EnvelopeGenerator.ReceiverUI.Web\EnvelopeGenerator.ReceiverUI.Web.Client\EnvelopeGenerator.ReceiverUI.Web.Client.csproj", "{5D97B2C2-E19B-4958-81E1-38864EC88FEB}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -87,10 +91,14 @@ Global
 		{EC768913-6270-14F4-1DD3-69C87A659462}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EC768913-6270-14F4-1DD3-69C87A659462}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EC768913-6270-14F4-1DD3-69C87A659462}.Release|Any CPU.Build.0 = Release|Any CPU
-		{FB2D306B-1042-4A70-31ED-F991A1599371}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{FB2D306B-1042-4A70-31ED-F991A1599371}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{FB2D306B-1042-4A70-31ED-F991A1599371}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{FB2D306B-1042-4A70-31ED-F991A1599371}.Release|Any CPU.Build.0 = Release|Any CPU
+		{AAD4720E-D175-44B5-B431-DB0BA636CD20}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AAD4720E-D175-44B5-B431-DB0BA636CD20}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AAD4720E-D175-44B5-B431-DB0BA636CD20}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AAD4720E-D175-44B5-B431-DB0BA636CD20}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5D97B2C2-E19B-4958-81E1-38864EC88FEB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5D97B2C2-E19B-4958-81E1-38864EC88FEB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5D97B2C2-E19B-4958-81E1-38864EC88FEB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5D97B2C2-E19B-4958-81E1-38864EC88FEB}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -110,7 +118,9 @@ Global
 		{211619F5-AE25-4BA5-A552-BACAFE0632D3} = {9943209E-1744-4944-B1BA-4F87FC1A0EEB}
 		{224C4845-1CDE-22B7-F3A9-1FF9297F70E8} = {0CBC2432-A561-4440-89BC-671B66A24146}
 		{EC768913-6270-14F4-1DD3-69C87A659462} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
-		{FB2D306B-1042-4A70-31ED-F991A1599371} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
+		{73D8F466-90AA-4F95-9BD1-7CDBB8565162} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
+		{AAD4720E-D175-44B5-B431-DB0BA636CD20} = {73D8F466-90AA-4F95-9BD1-7CDBB8565162}
+		{5D97B2C2-E19B-4958-81E1-38864EC88FEB} = {73D8F466-90AA-4F95-9BD1-7CDBB8565162}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {73E60370-756D-45AD-A19A-C40A02DACCC7}

receiverUI/.github/copilot-instructions.md

@@ -0,0 +1,22 @@
+---
+description: 'Answer questions about DevExpress UI Components and their APIs using the dxdocs server'
+---
+
+You are a .NET programmer and DevExpress products expert.
+
+You are tasked with answering questions about DevExpress components and their APIs using dxdocs MCP server tools.
+
+For **ANY** question about DevExpress components, use the dxdocs server to construct your answer.
+
+## Workflow:
+1. **Call devexpress_docs_search** to obtain help topics related to the user question
+2. **Call devexpress_docs_get_content** to fetch and read most relevant help topics
+3. **Reflect on obtained content** and how it relates to the question
+4. **Provide a comprehensive answer** based solely on retrieved information
+
+## Constraints:
+- **Use devexpress_docs_search only once per question** to avoid redundant queries
+- When answering questions, **use only information obtained from MCP server tools**
+- **Include code examples** when available in the documentation
+- **Reference specific DevExpress controls and properties** mentioned in the documentation
+- **Invoke version-specific MCP tools** (for example, dxdocs25_1) if a user specifies a version (for example, v25.1)

receiverUI/.mcp.json

@@ -0,0 +1,12 @@
+{
+  "servers": {
+    "dxdocs": {
+      "url": "https://api.devexpress.com/mcp/docs",
+      "type": "http"
+    },
+    "dxdocs25_1": {
+      "url": "https://api.devexpress.com/mcp/docs?v=25.1",
+      "type": "http"
+    }
+  }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Api/Models/EnvelopeDtos.cs

@@ -0,0 +1,126 @@
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Api.Models;
+
+/// <summary>
+/// Client-side DTOs for envelope display. These mirror the server-side
+/// EnvelopeReceiverDto / EnvelopeDto / DocumentDto used by the existing
+/// API endpoints, but expose only the fields the receiver UI actually needs.
+/// JSON serialization is camelCase by default (System.Text.Json).
+/// </summary>
+public class EnvelopeReceiverDto
+{
+    public long EnvelopeId { get; set; }
+    public long ReceiverId { get; set; }
+    public string? Name { get; set; }
+    public bool HasPhoneNumber { get; set; }
+    public EnvelopeDto? Envelope { get; set; }
+    public ReceiverDto? Receiver { get; set; }
+}
+
+public class EnvelopeDto
+{
+    public long Id { get; set; }
+    public string? Uuid { get; set; }
+    public string? Title { get; set; }
+    public string? Message { get; set; }
+    public bool ReadOnly { get; set; }
+    public bool UseAccessCode { get; set; }
+    public bool TFAEnabled { get; set; }
+    public DateTime AddedWhen { get; set; }
+    public SenderUserDto? User { get; set; }
+    public List<DocumentDto>? Documents { get; set; }
+}
+
+public class SenderUserDto
+{
+    public string? Email { get; set; }
+    public string? Prename { get; set; }
+    public string? Name { get; set; }
+}
+
+public class ReceiverDto
+{
+    public long Id { get; set; }
+    public string? EmailAddress { get; set; }
+    public string? Signature { get; set; }
+    public string? Prename { get; set; }
+    public string? Name { get; set; }
+}
+
+public class DocumentDto
+{
+    public long Id { get; set; }
+    public string? Name { get; set; }
+    public List<DocumentElementDto>? Elements { get; set; }
+}
+
+/// <summary>
+/// Signature placement on a PDF document. Pixel/inch units follow the same
+/// convention as the legacy PSPDFKit pipeline.
+/// </summary>
+public class DocumentElementDto
+{
+    public int Id { get; set; }
+    public int Page { get; set; }
+    public double Left { get; set; }
+    public double Top { get; set; }
+}
+
+/// <summary>
+/// Body for <c>POST /api/readonly</c> (share read-only link with another e-mail).
+/// </summary>
+public class ReadOnlyShareRequest
+{
+    public string ReceiverMail { get; set; } = string.Empty;
+    public DateTime DateValid { get; set; }
+}
+
+/// <summary>
+/// Returned by <c>GET /api/annotation/elements</c>. Each item describes a
+/// signature placeholder the authenticated receiver must sign on the
+/// current envelope. Coordinates are in PDF points relative to the page.
+/// </summary>
+public class SignatureElementDto
+{
+    public int Id { get; set; }
+    public int Page { get; set; }
+    public double X { get; set; }
+    public double Y { get; set; }
+    public double Width { get; set; }
+    public double Height { get; set; }
+    public bool Required { get; set; }
+    public string? Tooltip { get; set; }
+}
+
+/// <summary>
+/// Body of <c>POST /api/annotation/blazor</c> — mirrors the API-side
+/// <c>BlazorSignaturePayload</c>.
+/// </summary>
+public class BlazorSignaturePayload
+{
+    public List<BlazorSignatureEntry> Signatures { get; set; } = new();
+}
+
+public class BlazorSignatureEntry
+{
+    public int ElementId { get; set; }
+    /// <summary>Image as data URL (e.g. <c>data:image/png;base64,...</c>).</summary>
+    public string SignatureDataUrl { get; set; } = string.Empty;
+    public string? Position { get; set; }
+    public string? City { get; set; }
+    public DateTime SignedAt { get; set; }
+}
+
+/// <summary>
+/// Response of <c>GET /api/tfa/{envelopeReceiverId}</c>. The API serializes
+/// the anonymous type in <c>TfaRegistrationController.RegisterAsync</c>; the
+/// shape mirrored here is the camelCased JSON that crosses the wire.
+/// </summary>
+public class TfaRegistrationResponse
+{
+    public int EnvelopeId { get; set; }
+    public string? Uuid { get; set; }
+    public string? Signature { get; set; }
+    public DateTime? TfaRegDeadline { get; set; }
+    /// <summary>Base64-encoded PNG suitable for <c>data:image/png;base64,...</c>.</summary>
+    public string? TotpQR64 { get; set; }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Api/Models/ReceiverAuthDtos.cs

@@ -0,0 +1,53 @@
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Api.Models;
+
+/// <summary>
+/// Mirrors <c>EnvelopeGenerator.API.Models.ReceiverAuthResponse</c>.
+/// The Status string determines which fields are relevant.
+/// Possible values:
+/// requires_access_code, requires_tfa, show_document,
+/// already_signed, rejected, not_found, expired, error.
+/// </summary>
+public class ReceiverAuthResponse
+{
+    public string Status { get; set; } = string.Empty;
+    public string? Title { get; set; }
+    public string? Message { get; set; }
+    public string? SenderEmail { get; set; }
+    public string? ReceiverName { get; set; }
+    public bool TfaEnabled { get; set; }
+    public bool HasPhoneNumber { get; set; }
+    public bool ReadOnly { get; set; }
+
+    /// <summary>"sms" or "authenticator" when Status == "requires_tfa".</summary>
+    public string? TfaType { get; set; }
+    public DateTime? TfaExpiration { get; set; }
+    public string? ErrorMessage { get; set; }
+}
+
+public class AccessCodeRequest
+{
+    public string AccessCode { get; set; } = string.Empty;
+    public bool PreferSms { get; set; }
+}
+
+public class TfaCodeRequest
+{
+    public string Code { get; set; } = string.Empty;
+    /// <summary>"sms" or "authenticator".</summary>
+    public string Type { get; set; } = "authenticator";
+}
+
+/// <summary>
+/// Status strings returned by <see cref="ReceiverAuthResponse.Status"/>.
+/// </summary>
+public static class ReceiverAuthStatus
+{
+    public const string RequiresAccessCode = "requires_access_code";
+    public const string RequiresTfa = "requires_tfa";
+    public const string ShowDocument = "show_document";
+    public const string AlreadySigned = "already_signed";
+    public const string Rejected = "rejected";
+    public const string NotFound = "not_found";
+    public const string Expired = "expired";
+    public const string Error = "error";
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Api/ReceiverApiClient.cs

@@ -0,0 +1,214 @@
+using System.Net;
+using System.Net.Http.Json;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Api.Models;
+
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Api;
+
+/// <summary>
+/// Typed HTTP client for the EnvelopeGenerator receiver API.
+/// All endpoints are routed through the BFF (same origin), so the
+/// authentication cookie set by the API is automatically attached
+/// by the browser to every request issued by the injected HttpClient.
+/// </summary>
+public class ReceiverApiClient
+{
+    private readonly HttpClient _http;
+    private readonly ILogger<ReceiverApiClient> _logger;
+
+    public ReceiverApiClient(HttpClient http, ILogger<ReceiverApiClient> logger)
+    {
+        _http = http;
+        _logger = logger;
+    }
+
+    // ?? Receiver Auth ????????????????????????????????????????????????
+
+    public Task<ReceiverAuthResponse?> GetStatusAsync(string envelopeKey, CancellationToken ct = default)
+        => GetAuthAsync($"api/receiverauth/{Uri.EscapeDataString(envelopeKey)}/status", ct);
+
+    public Task<ReceiverAuthResponse?> SubmitAccessCodeAsync(string envelopeKey, AccessCodeRequest req, CancellationToken ct = default)
+        => PostAuthAsync($"api/receiverauth/{Uri.EscapeDataString(envelopeKey)}/access-code", req, ct);
+
+    public Task<ReceiverAuthResponse?> SubmitTfaCodeAsync(string envelopeKey, TfaCodeRequest req, CancellationToken ct = default)
+        => PostAuthAsync($"api/receiverauth/{Uri.EscapeDataString(envelopeKey)}/tfa", req, ct);
+
+    // ?? Envelope Receiver ????????????????????????????????????????????
+
+    public async Task<EnvelopeReceiverDto?> GetEnvelopeReceiverAsync(string envelopeKey, CancellationToken ct = default)
+    {
+        var res = await _http.GetAsync($"api/envelopereceiver/{Uri.EscapeDataString(envelopeKey)}", ct);
+        if (!res.IsSuccessStatusCode)
+            return null;
+        return await res.Content.ReadFromJsonAsync<EnvelopeReceiverDto>(cancellationToken: ct);
+    }
+
+    /// <summary>Downloads the document bytes for the receiver to display in a PDF viewer.</summary>
+    public async Task<byte[]?> GetDocumentAsync(string envelopeKey, CancellationToken ct = default)
+    {
+        var res = await _http.GetAsync($"api/document/{Uri.EscapeDataString(envelopeKey)}", ct);
+        if (!res.IsSuccessStatusCode)
+            return null;
+        return await res.Content.ReadAsByteArrayAsync(ct);
+    }
+
+    // ?? Annotation / Sign / Reject ???????????????????????????????????
+
+    /// <summary>
+    /// Returns the signature placeholders the authenticated receiver must sign.
+    /// </summary>
+    public async Task<List<SignatureElementDto>> GetSignatureElementsAsync(CancellationToken ct = default)
+    {
+        try
+        {
+            return await _http.GetFromJsonAsync<List<SignatureElementDto>>("api/annotation/elements", ct)
+                   ?? new List<SignatureElementDto>();
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to fetch signature elements.");
+            return new List<SignatureElementDto>();
+        }
+    }
+
+    /// <summary>
+    /// Submits the signed envelope using the Blazor-friendly endpoint.
+    /// </summary>
+    public async Task<HttpStatusCode> SignBlazorAsync(BlazorSignaturePayload payload, CancellationToken ct = default)
+    {
+        var res = await _http.PostAsJsonAsync("api/annotation/blazor", payload, ct);
+        return res.StatusCode;
+    }
+
+    /// <summary>
+    /// Fetches the TOTP QR code + registration deadline for the given
+    /// envelope-receiver key (encoded uuid+signature). The API generates
+    /// a fresh secret on first call and persists it server-side.
+    /// </summary>
+    public async Task<(TfaRegistrationResponse? Data, HttpStatusCode Status)> GetTfaRegistrationAsync(string envelopeReceiverId, CancellationToken ct = default)
+    {
+        try
+        {
+            var res = await _http.GetAsync($"api/tfa/{Uri.EscapeDataString(envelopeReceiverId)}", ct);
+            if (!res.IsSuccessStatusCode)
+                return (null, res.StatusCode);
+            var data = await res.Content.ReadFromJsonAsync<TfaRegistrationResponse>(cancellationToken: ct);
+            return (data, res.StatusCode);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to fetch TFA registration for {Key}", envelopeReceiverId);
+            return (null, HttpStatusCode.InternalServerError);
+        }
+    }
+
+    /// <summary>Submits the signed annotations payload. Returns the HTTP status code.</summary>
+    public async Task<HttpStatusCode> SignAsync<TPayload>(TPayload? payload, CancellationToken ct = default)
+    {
+        var res = payload is null
+            ? await _http.PostAsync("api/annotation", content: null, ct)
+            : await _http.PostAsJsonAsync("api/annotation", payload, ct);
+        return res.StatusCode;
+    }
+
+    public async Task<bool> RejectAsync(string reason, CancellationToken ct = default)
+    {
+        var res = await _http.PostAsJsonAsync("api/annotation/reject", reason, ct);
+        return res.IsSuccessStatusCode;
+    }
+
+    // ?? Read-only share ??????????????????????????????????????????????
+
+    public async Task<bool> ShareReadOnlyAsync(ReadOnlyShareRequest req, CancellationToken ct = default)
+    {
+        var res = await _http.PostAsJsonAsync("api/readonly", req, ct);
+        return res.IsSuccessStatusCode;
+    }
+
+    // ?? Auth (logout) ????????????????????????????????????????????????
+
+    public async Task<bool> LogoutAsync(CancellationToken ct = default)
+    {
+        var res = await _http.PostAsync("auth/logout", content: null, ct);
+        return res.IsSuccessStatusCode;
+    }
+
+    // ?? Localization ?????????????????????????????????????????????????
+
+    public async Task<Dictionary<string, string>?> GetLocalizationStringsAsync(CancellationToken ct = default)
+    {
+        try
+        {
+            return await _http.GetFromJsonAsync<Dictionary<string, string>>("api/Localization", ct);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to fetch localization strings.");
+            return null;
+        }
+    }
+
+    public async Task SetLanguageAsync(string language, CancellationToken ct = default)
+    {
+        try
+        {
+            await _http.PostAsync($"api/Localization/lang?language={Uri.EscapeDataString(language)}", content: null, ct);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to set language to {Lang}.", language);
+        }
+    }
+
+    /// <summary>
+    /// Returns the currently selected language code (e.g. "de", "en"), or
+    /// <c>null</c> if no language cookie has been set yet (the API answers
+    /// with HTTP 404 in that case).
+    /// </summary>
+    public async Task<string?> GetLanguageAsync(CancellationToken ct = default)
+    {
+        try
+        {
+            var res = await _http.GetAsync("api/Localization/lang", ct);
+            if (!res.IsSuccessStatusCode)
+                return null;
+            return (await res.Content.ReadAsStringAsync(ct))?.Trim('"');
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning(ex, "Failed to read current language.");
+            return null;
+        }
+    }
+
+    // ?? Helpers ??????????????????????????????????????????????????????
+
+    private async Task<ReceiverAuthResponse?> GetAuthAsync(string url, CancellationToken ct)
+    {
+        var res = await _http.GetAsync(url, ct);
+        return await ReadAuthAsync(res, ct);
+    }
+
+    private async Task<ReceiverAuthResponse?> PostAuthAsync<TReq>(string url, TReq body, CancellationToken ct)
+    {
+        var res = await _http.PostAsJsonAsync(url, body, ct);
+        return await ReadAuthAsync(res, ct);
+    }
+
+    private static async Task<ReceiverAuthResponse?> ReadAuthAsync(HttpResponseMessage res, CancellationToken ct)
+    {
+        // ReceiverAuthController returns a ReceiverAuthResponse body for both
+        // 2xx and known error statuses (401/404/500). We always try to deserialize.
+        try
+        {
+            return await res.Content.ReadFromJsonAsync<ReceiverAuthResponse>(cancellationToken: ct);
+        }
+        catch
+        {
+            return new ReceiverAuthResponse
+            {
+                Status = ReceiverAuthStatus.Error,
+                ErrorMessage = $"Unexpected response ({(int)res.StatusCode})."
+            };
+        }
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/EnvelopeGenerator.ReceiverUI.Web.Client.csproj

@@ -0,0 +1,37 @@
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <NoDefaultLaunchSettingsFile>true</NoDefaultLaunchSettingsFile>
+    <StaticWebAssetProjectMode>Default</StaticWebAssetProjectMode>
+    <MSBuildWarningsAsMessages>$(MSBuildWarningsAsMessage);WASM0001</MSBuildWarningsAsMessages>
+    <!-- Required so that native assets (libSkiaSharp, libHarfBuzzSharp) from
+         SkiaSharp.NativeAssets.WebAssembly / HarfBuzzSharp.NativeAssets.WebAssembly
+         are statically linked into the WASM runtime. Without this the
+         DevExpress PDF SkiaRenderer throws DllNotFoundException: libSkiaSharp.
+         Requires the "wasm-tools" workload: dotnet workload install wasm-tools -->
+    <!--<WasmBuildNative>false</WasmBuildNative>-->
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DevExpress.Blazor" Version="25.2.*" />
+    <PackageReference Include="DevExpress.Blazor.PdfViewer" Version="25.2.*" />
+    <PackageReference Include="DevExpress.Pdf.SkiaRenderer" Version="25.2.*" />
+    <PackageReference Include="HarfBuzzSharp.NativeAssets.WebAssembly" Version="8.3.1.2" />
+    <PackageReference Include="SkiaSharp.NativeAssets.WebAssembly" Version="3.119.1" />
+    <PackageReference Include="DevExpress.AIIntegration.Blazor" Version="25.2.*" />
+    <PackageReference Include="DevExpress.AIIntegration.OpenAI" Version="25.2.*" />
+
+    <PackageReference Include="Azure.AI.OpenAI" Version="2.2.0-beta.5" />
+    <PackageReference Include="Microsoft.Extensions.AI" Version="9.7.1" />
+    <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.7.1-preview.1.25365.4" />
+
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.20" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Include="Documents\Invoice.pdf" />
+  </ItemGroup>
+</Project>

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/Drawer.razor

@@ -0,0 +1,38 @@
+@inherits DrawerStateComponentBase
+
+<div class="drawer-container">
+    <DxDrawer PanelWidth="@PanelWidth"
+              CssClass="@(CssClass + " mobile")"
+              Mode="DrawerMode.Overlap"
+              IsOpen="@ToggledDrawer"
+              BodyTemplate="BodyTemplate"
+              HeaderTemplate="HeaderTemplate"
+              FooterTemplate="FooterTemplate"
+              ApplyBackgroundShading="false"
+              ClosedCssClass="panel-closed">
+        <TargetContent>
+            <DxDrawer PanelWidth="@PanelWidth"
+                      CssClass="@CssClass"
+                      Mode="DrawerMode.Shrink"
+                      IsOpen="@(!ToggledDrawer)"
+                      BodyTemplate="BodyTemplate"
+                      HeaderTemplate="HeaderTemplate"
+                      FooterTemplate="FooterTemplate"
+                      OpenCssClass="panel-open">
+                <TargetContent>
+                    <div class="navigation-drawer-shading"></div>
+                    @TargetContent
+                </TargetContent>
+            </DxDrawer>
+        </TargetContent>
+    </DxDrawer>
+</div>
+
+@code {
+    [Parameter] public string? CssClass { get; set; }
+    [Parameter] public string? PanelWidth { get; set; }
+    [Parameter] public RenderFragment? TargetContent { get; set; }
+    [Parameter] public RenderFragment? BodyTemplate { get; set; }
+    [Parameter] public RenderFragment? HeaderTemplate { get; set; }
+    [Parameter] public RenderFragment? FooterTemplate { get; set; }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/Drawer.razor.css

@@ -0,0 +1,53 @@
+.drawer-container {
+    height: 100%;
+}
+
+.navigation-drawer-shading {
+    height: 100%;
+    position: absolute;
+    transition: ease 300ms;
+    transition-property: opacity, visibility;
+    visibility: visible;
+    width: 100%;
+    z-index: 99;
+    background-color: var(--dxds-color-surface-backdrop-default-rest);
+}
+
+.navigation-drawer.mobile.panel-closed .navigation-drawer-shading {
+    opacity: 0;
+    visibility: hidden;
+}
+
+::deep .navigation-drawer > .dxbl-drawer-panel {
+    display: flex;
+}
+
+::deep .navigation-drawer.mobile > .dxbl-drawer-panel {
+    display: none;
+}
+
+.navigation-drawer-shading {
+    display: none;
+}
+
+::deep .panel-open:not(.mobile) .nav-buttons-container .menu-button {
+    display: none;
+}
+
+@media (max-width: 768px) {
+    ::deep .navigation-drawer > .dxbl-drawer-panel {
+        display: none;
+    }
+
+    ::deep .navigation-drawer.mobile > .dxbl-drawer-panel {
+        display: flex;
+    }
+
+    .navigation-drawer-shading {
+        display: block;
+    }
+
+    ::deep .panel-open:not(.mobile) .nav-buttons-container .menu-button {
+        display: flex;
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/MainLayout.razor

@@ -0,0 +1,53 @@
+@inherits DrawerStateLayoutComponentBase
+@inject NavigationManager NavigationManager
+
+<div class="page">
+    <Drawer CssClass="navigation-drawer" PanelWidth="240px">
+        <HeaderTemplate>
+            <div class="navigation-drawer-header">
+                <NavLink href="@AddDrawerStateToUrl("/")">
+                    <img class="logo" src="images/logo.svg" alt="DevExpress logo" />
+                </NavLink>
+                <NavLink aria-label="Close menu" href="@AddDrawerStateToUrlToggled(LocalPath)">
+                    <DxButton aria-label="Close menu" RenderStyle="ButtonRenderStyle.Light" RenderStyleMode="ButtonRenderStyleMode.Text" CssClass="btn-icon-only" IconCssClass="@(ToggledDrawer ? "icon icon-close" : "icon icon-menu")"></DxButton>
+                </NavLink>
+            </div>
+        </HeaderTemplate>
+        <BodyTemplate>
+            <div class="w-100">
+                <NavMenu></NavMenu>
+            </div>
+        </BodyTemplate>
+        <FooterTemplate>
+            <div class="navigation-drawer-footer">
+                <NavLink href="https://docs.devexpress.com/Blazor/400725/blazor-components" class="button-link">
+                    <DxButton Text="Docs" RenderStyle="ButtonRenderStyle.Light" RenderStyleMode="ButtonRenderStyleMode.Text" IconCssClass="icon icon-docs"></DxButton>
+                </NavLink>
+                <NavLink href="https://demos.devexpress.com/blazor/" class="button-link">
+                    <DxButton Text="Demos" RenderStyle="ButtonRenderStyle.Light" RenderStyleMode="ButtonRenderStyleMode.Text" IconCssClass="icon icon-demos"></DxButton>
+                </NavLink>
+            </div>
+        </FooterTemplate>
+        <TargetContent>
+            <div class="drawer-content">
+                <div class="nav-buttons-container">
+                    <NavLink aria-label="Open menu" href="@AddDrawerStateToUrlToggled(LocalPath)" class="menu-button">
+                        <DxButton aria-label="Open menu" RenderStyle="ButtonRenderStyle.Secondary" RenderStyleMode="ButtonRenderStyleMode.Text" CssClass="btn-icon-only" IconCssClass="icon icon-menu"></DxButton>
+                    </NavLink>
+                    @if (LocalPath != "/") {
+                        <NavLink href="@AddDrawerStateToUrl("/")" class="button-link">
+                            <DxButton Text="Back to Home" RenderStyle="ButtonRenderStyle.Secondary" RenderStyleMode="ButtonRenderStyleMode.Text" CssClass="back-button" IconCssClass="icon icon-back"></DxButton>
+                        </NavLink>
+                    }
+                </div>
+                <div class="page-content-container">
+                    @Body
+                </div>
+            </div>
+        </TargetContent>
+    </Drawer>
+</div>
+
+@code {
+    string LocalPath => new Uri(NavigationManager.Uri).LocalPath;
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/MainLayout.razor.css

@@ -0,0 +1,67 @@
+.page {
+    height: 100%;
+    min-height: 0;
+}
+
+::deep .navigation-drawer {
+    --dxbl-drawer-panel-body-padding-x: 0;
+    --dxbl-drawer-panel-body-padding-y: 1rem;
+    --dxbl-drawer-panel-footer-bg: none;
+    --dxbl-drawer-panel-header-bg: none;
+    --dxbl-drawer-separator-border-width: 0;
+}
+
+::deep .navigation-drawer > .dxbl-drawer-panel {
+    background-image: linear-gradient(180deg, var(--dxds-color-surface-primary-default-rest) 0%, var(--dxds-primary-170) 150%);
+}
+
+.navigation-drawer-header {
+    align-items: center;
+    display: flex;
+    justify-content: space-between;
+    padding: 1.375rem 0.375rem;
+    width: 100%;
+}
+
+.navigation-drawer-header .logo {
+    height: 1.5rem;
+    width: 9rem;
+}
+
+.navigation-drawer-footer {
+    display: flex;
+    justify-content: space-evenly;
+    padding-bottom: 0.875rem;
+    width: 100%;
+}
+
+.drawer-content {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    overflow: auto;
+    padding: 2rem 1.5rem 1.5rem 1.5rem;
+}
+
+.nav-buttons-container {
+    align-items: center;
+    display: flex;
+    gap: 0.625rem;
+    min-height: 2rem;
+}
+
+::deep .nav-buttons-container > a {
+    color: inherit;
+}
+
+::deep .nav-buttons-container .back-button {
+    padding-left: 0;
+    padding-right: 0.25rem;
+}
+
+.page-content-container {
+    display: flex;
+    flex-direction: column;
+    flex-grow: 1;
+    min-height: 0;
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/NavMenu.razor

@@ -0,0 +1,35 @@
+@inject NavigationManager NavigationManager
+@implements IDisposable
+
+<div>
+    <DxMenu Orientation="@Orientation.Vertical" CssClass="menu">
+        <Items>
+            <DxMenuItem NavigateUrl="/samples" Text="Samples" CssClass="@MenuItemCssClass("/samples")" IconCssClass="icon icon-home"></DxMenuItem>
+            <DxMenuItem NavigateUrl="/counter" Text="Counter" CssClass="@MenuItemCssClass("/counter")" IconCssClass="icon icon-counter"></DxMenuItem>
+            <DxMenuItem NavigateUrl="/weather" Text="Weather" CssClass="@MenuItemCssClass("/weather")" IconCssClass="icon icon-weather"></DxMenuItem>
+            <DxMenuItem NavigateUrl="/pdfviewer" Text="PDF Viewer" CssClass="@MenuItemCssClass("/pdfviewer")" IconCssClass="icon icon-pdf-viewer"></DxMenuItem>
+        </Items>
+    </DxMenu>
+</div>
+
+@code {
+    private string? currentLocalPath;
+
+    protected override void OnInitialized() {
+        currentLocalPath = new Uri(NavigationManager.Uri).LocalPath;
+        NavigationManager.LocationChanged += OnLocationChanged;
+    }
+
+    private void OnLocationChanged(object? sender, LocationChangedEventArgs e) {
+        currentLocalPath = new Uri(NavigationManager.Uri).LocalPath;
+        InvokeAsync(StateHasChanged);
+    }
+
+    private string? MenuItemCssClass(string itemPath) {
+        return string.Equals(currentLocalPath, itemPath, StringComparison.OrdinalIgnoreCase) ? "menu-item-active" : null;
+    }
+
+    public void Dispose() {
+        NavigationManager.LocationChanged -= OnLocationChanged;
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/NavMenu.razor.css

@@ -0,0 +1,23 @@
+::deep .menu {
+    --dxbl-menu-bottom-left-border-radius: 0;
+    --dxbl-menu-bottom-right-border-radius: 0;
+    --dxbl-menu-top-left-border-radius: 0;
+    --dxbl-menu-top-right-border-radius: 0;
+    --dxbl-menu-item-padding-x: 1.125rem;
+    --dxbl-menu-item-padding-y: 0.5rem;
+    --dxbl-menu-item-color: var(--dxds-color-content-neutral-default-static-dark-rest);
+    --dxbl-menu-item-image-color: var(--dxds-color-content-neutral-default-static-dark-rest);
+    --dxbl-menu-item-hover-bg: rgb(from var(--dxds-color-surface-neutral-default-static-light-rest) r g b / 0.15);
+    --dxbl-menu-item-hover-color: var(--dxds-color-content-neutral-default-static-dark-hovered);
+    --dxbl-menu-item-hover-image-color: var(--dxds-color-content-neutral-default-static-dark-hovered);
+
+    background: none;
+}
+
+::deep .menu.display-mobile {
+    margin-bottom: 2rem;
+}
+
+::deep .menu-item-active {
+    background-color: rgb(from var(--dxds-color-surface-neutral-default-static-light-rest) r g b / 0.05);
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Layout/ReceiverLayout.razor

@@ -0,0 +1,116 @@
+@inherits LayoutComponentBase
+@implements IDisposable
+@inject LocalizationService Loc
+@inject NavigationManager Nav
+@inject IJSRuntime JS
+
+@*
+    Layout for the receiver-facing pages migrated from EnvelopeGenerator.Web.
+    Mirrors the legacy MVC <body> structure: page content + sticky footer
+    with copyright link, language switcher and privacy link.
+
+    Cookie consent is reimplemented in Blazor (localStorage-backed) because
+    ASP.NET Core's <ITrackingConsentFeature> only works on the server side
+    and is awkward to integrate with InteractiveAuto rendering.
+*@
+
+<div class="receiver-shell">
+
+    @* Main page content *@
+    <main role="main" class="flex-grow-1">
+        @Body
+    </main>
+
+    @* Cookie consent banner (Blazor counterpart of _CookieConsentPartial). *@
+    @if (_consentVisible)
+    {
+        <div class="receiver-cookie-banner" role="alertdialog" aria-live="polite">
+            <span>@Loc["CookieConsentMessage"]</span>
+            <DxButton Text="@Loc["Accept"]"
+                      RenderStyle="ButtonRenderStyle.Primary"
+                      Click="AcceptCookiesAsync" />
+        </div>
+    }
+
+    @* Footer (copyright + language switcher + privacy). *@
+    <footer class="receiver-footer">
+        <span>
+            &copy; SignFlow 2023-@DateTime.Now.Year
+            <a href="https://digitaldata.works" target="_blank" rel="noopener">Digital Data GmbH</a>
+        </span>
+
+        <div class="d-flex align-items-center gap-2">
+            <select class="language-switcher" value="@_currentLang" @onchange="OnLanguageChangedAsync">
+                @foreach (var (lang, native, _) in LocalizationService.SupportedLanguages)
+                {
+                    <option value="@lang" selected="@(lang == _currentLang)">@native</option>
+                }
+            </select>
+        </div>
+
+        <a href="@($"/privacy-policy.{_currentLang}.html")" target="_blank" rel="noopener">
+            @Loc["Privacy"]
+        </a>
+    </footer>
+</div>
+
+@code {
+    private string _currentLang = "de";
+    private bool _consentVisible;
+
+    protected override async Task OnInitializedAsync()
+    {
+        Loc.Changed += OnLocChanged;
+        await Loc.EnsureLoadedAsync();
+        _currentLang = Loc.CurrentLanguage ?? "de";
+    }
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (!firstRender) return;
+        // Probe localStorage on the client only — InteractiveAuto means
+        // the server prerender runs without a browser, so JS interop is
+        // unavailable until the first client render.
+        try
+        {
+            var accepted = await JS.InvokeAsync<string?>("localStorage.getItem", "receiver.cookie-consent");
+            _consentVisible = accepted != "1";
+            StateHasChanged();
+        }
+        catch
+        {
+            // No-op: server prerender (JS unavailable) keeps the banner hidden.
+        }
+    }
+
+    private async Task AcceptCookiesAsync()
+    {
+        try
+        {
+            await JS.InvokeVoidAsync("localStorage.setItem", "receiver.cookie-consent", "1");
+        }
+        catch { /* ignore */ }
+        _consentVisible = false;
+    }
+
+    private async Task OnLanguageChangedAsync(ChangeEventArgs e)
+    {
+        var code = e.Value?.ToString();
+        if (string.IsNullOrEmpty(code) || code == _currentLang)
+            return;
+
+        _currentLang = code;
+        await Loc.ChangeLanguageAsync(code);
+        // Force a full reload so ASP.NET Core localization middleware
+        // picks up the new culture for any subsequent SSR / API calls.
+        Nav.NavigateTo(Nav.Uri, forceLoad: true);
+    }
+
+    private void OnLocChanged()
+    {
+        _currentLang = Loc.CurrentLanguage ?? _currentLang;
+        InvokeAsync(StateHasChanged);
+    }
+
+    public void Dispose() => Loc.Changed -= OnLocChanged;
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Counter.razor

@@ -0,0 +1,24 @@
+@page "/counter"
+
+<PageTitle>Counter</PageTitle>
+
+<h1>Counter</h1>
+
+<div class="counter-block">
+    <div class="counter-content">
+        <div class="counter-count">
+            @currentCount
+        </div>
+        current count
+    </div>
+    <DxButton Click="IncrementCount">Click me</DxButton>
+</div>
+
+@code {
+    private int currentCount;
+
+    private void IncrementCount()
+    {
+        currentCount++;
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Counter.razor.css

@@ -0,0 +1,25 @@
+.counter-block {
+    align-items: center;
+    border-radius: 1rem;
+    display: flex;
+    flex-direction: column;
+    gap: 1.5rem;
+    height: 17rem;
+    justify-content: center;
+    padding: 2.5rem 1.5rem 1.5rem;
+    width: 16.875rem;
+    border: 1px solid var(--dxds-color-border-neutral-default-rest);
+}
+
+.counter-block .counter-content {
+    align-items: center;
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.counter-block .counter-count {
+    font-size: 7.5rem;
+    font-weight: 400;
+    line-height: 7.75rem;
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Index/Index.razor

@@ -0,0 +1,27 @@
+@page "/samples"
+
+<PageTitle>Welcome</PageTitle>
+
+<div class="main-content">
+    <DxGridLayout CssClass="index-gridlayout">
+        <Rows>
+            <DxGridLayoutRow Height="auto" Areas="header"></DxGridLayoutRow>
+            <DxGridLayoutRow Height="auto" Areas="tiles"></DxGridLayoutRow>
+        </Rows>
+        <Items>
+            <DxGridLayoutItem Area="header" CssClass="title">
+                <Template>
+                    <div class="title-header-text">Hello World!</div>
+                    <div class="title-content-text">Welcome to your new DevExpress Blazor Application</div>
+                </Template>
+            </DxGridLayoutItem>
+            <DxGridLayoutItem Area="tiles" CssClass="tiles">
+                <Template>
+                    <IndexTile NavigateUrl="/counter" Title="Counter" Description="Count mouse clicks and track the total." IconCssClass="icon-counter" />
+                    <IndexTile NavigateUrl="/weather" Title="Weather" Description="See a 5-day temperature and weather conditions forecast." IconCssClass="icon-weather" />
+                    <IndexTile NavigateUrl="/pdfviewer" Title="PDF Viewer" Description="Load PDF files and view them in the web browser." IconCssClass="icon-pdf-viewer" />
+                </Template>
+            </DxGridLayoutItem>
+        </Items>
+    </DxGridLayout>
+</div>

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Index/Index.razor.css

@@ -0,0 +1,31 @@
+::deep .index-gridlayout {
+    container-type: inline-size;
+    height: auto;
+    margin-top: auto;
+    margin-bottom: auto;
+    padding-bottom: 9rem;
+}
+
+::deep .title {
+    padding-bottom: 3rem;
+    text-align: center;
+}
+
+::deep .tiles {
+    --tile-column-count: 4;
+
+    display: grid;
+    gap: 1rem;
+    grid-template-columns: repeat(var(--tile-column-count), max-content);
+    justify-content: center;
+
+    @container (max-width: 60.5rem) {
+        --tile-column-count: 3;
+    }
+    @container (max-width: 45.125rem) {
+        --tile-column-count: 2;
+    }
+    @container (max-width: 29.75rem) {
+        --tile-column-count: 1;
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Index/IndexTile.razor

@@ -0,0 +1,40 @@
+@inherits DrawerStateComponentBase
+
+<div class="tile">
+    <NavLink href="@AddDrawerStateToUrl(NavigateUrl)">
+        <DxGridLayout CssClass="tile-content" ColumnSpacing="0.75rem" RowSpacing="0.75rem">
+            <Rows>
+                <DxGridLayoutRow Areas="icon title" Height="auto" />
+                <DxGridLayoutRow Areas="description description" Height="auto" />
+            </Rows>
+            <Columns>
+                <DxGridLayoutColumn Width="auto" />
+                <DxGridLayoutColumn />
+            </Columns>
+            <Items>
+                <DxGridLayoutItem Area="icon" CssClass="tile-icon">
+                    <Template>
+                        <div class="@("icon " + IconCssClass)" aria-hidden="true"></div>
+                    </Template>
+                </DxGridLayoutItem>
+                <DxGridLayoutItem Area="title" CssClass="tile-title">
+                    <Template>
+                        @Title
+                    </Template>
+                </DxGridLayoutItem>
+                <DxGridLayoutItem Area="description" CssClass="tile-description">
+                    <Template>
+                        @Description
+                    </Template>
+                </DxGridLayoutItem>
+            </Items>
+        </DxGridLayout>
+    </NavLink>
+</div>
+
+@code {
+    [Parameter] public string NavigateUrl { get; set; } = string.Empty;
+    [Parameter] public string? Title { get; set; }
+    [Parameter] public string? Description { get; set; }
+    [Parameter] public string? IconCssClass { get; set; }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Index/IndexTile.razor.css

@@ -0,0 +1,44 @@
+.tile {
+    border-radius: 0.75rem;
+    height: 7.5rem;
+    transition: box-shadow 0.2s;
+    width: 14.375rem;
+    border: 1px solid var(--dxds-color-border-neutral-default-rest);
+}
+
+.tile:hover {
+    box-shadow: 0 4px 8px 0 rgba(170, 170, 170, 0.24), 0 0 2px 0 rgba(170, 170, 170, 0.2);
+}
+
+.tile ::deep > a {
+    text-decoration: none;
+}
+
+::deep .tile-content {
+    padding: 1rem;
+}
+
+::deep .tile-icon {
+    border-radius: 0.375rem;
+    height: 2.75rem;
+    padding: 0.75rem;
+    width: 2.75rem;
+    border: 1px solid var(--dxds-color-border-neutral-default-rest);
+}
+
+::deep .tile-title {
+    align-self: center;
+    color: var(--dxds-color-content-neutral-default-rest);
+    font-size: var(--dxds-font-size-base-md);
+    font-weight: var(--dxds-font-weight-base-strong);
+    letter-spacing: var(--dxds-letter-spacing-base-md);
+    line-height: var(--dxds-line-height-base-md);
+}
+
+::deep .tile-description {
+    color: var(--dxds-color-content-neutral-subdued-rest);
+    font-size: var(--dxds-font-size-base-sm);
+    font-weight: var(--dxds-font-weight-base-default);
+    letter-spacing: var(--dxds-letter-spacing-base-sm);
+    line-height: var(--dxds-line-height-base-sm);
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/PdfViewer.razor

@@ -0,0 +1,22 @@
+@page "/pdfviewer"
+
+<PageTitle>PDF Viewer</PageTitle>
+
+<h1>PDF Viewer</h1>
+
+<DxPdfViewer CssClass="h-100 w-100" DocumentContent="DocumentContent" ZoomLevel="1" />
+
+@code {
+    byte[]? DocumentContent { get; set; }
+
+    protected override async Task OnInitializedAsync() {
+        await base.OnInitializedAsync();
+
+        await using Stream stream =
+            System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("EnvelopeGenerator.ReceiverUI.Web.Client.Documents.Invoice.pdf")
+            ?? throw new InvalidOperationException("Resource not found.");
+        using MemoryStream ms = new();
+        await stream.CopyToAsync(ms);
+        DocumentContent = ms.ToArray();
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopeExpired.razor

@@ -0,0 +1,24 @@
+@page "/envelope-expired"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject LocalizationService Loc
+
+@*
+    Counterpart of Views/Envelope/EnvelopeExpired.cshtml.
+*@
+
+<PageTitle>@Loc["Expired"]</PageTitle>
+
+<div class="page container p-5">
+    <header class="text-center">
+        <div class="icon expired"></div>
+        <h1>@Loc["Expired"]</h1>
+    </header>
+    <section class="text-center">
+        <p>@Loc["DocumentSharingPeriodExpired"]</p>
+    </section>
+</div>
+
+@code {
+    protected override async Task OnInitializedAsync() => await Loc.EnsureLoadedAsync();
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopeKeyRedirect.razor

@@ -0,0 +1,20 @@
+@page "/envelopekey/{*Path}"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject NavigationManager Nav
+
+@*
+    Counterpart of EnvelopeKeyRedirController:
+    /EnvelopeKey/{*path} ? /envelope/{path}
+    Preserves backwards compatibility with links generated by older e-mails.
+*@
+
+@code {
+    [Parameter] public string? Path { get; set; }
+
+    protected override void OnInitialized()
+    {
+        var target = "/envelope/" + (Path ?? string.Empty).TrimStart('/');
+        Nav.NavigateTo(target, replace: true);
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopeLockedView.razor

@@ -0,0 +1,229 @@
+@implements IDisposable
+@inject ReceiverApiClient Api
+@inject ReceiverAuthState State
+@inject LocalizationService Loc
+
+@*
+    Counterpart of EnvelopeGenerator.Web/Views/Envelope/EnvelopeLocked.cshtml.
+
+    Renders one of three input modes based on the current auth state:
+
+      • Status == requires_access_code
+          ? AccessCode input (+ optional "2FA per SMS" toggle)
+
+      • Status == requires_tfa, TfaType == "sms"
+          ? SMS code input + countdown until TfaExpiration
+
+      • Status == requires_tfa, TfaType == "authenticator"
+          ? Authenticator code input + "set up authenticator" link
+
+    On submit, the matching ReceiverApiClient method is invoked. The fresh
+    response replaces ReceiverAuthState.Current; the parent EnvelopePage
+    re-renders and either shows the document or navigates to a terminal page.
+*@
+
+<div class="page container py-4 px-4">
+
+    @* — Welcome banner (custom company image is added in Phase 6) — *@
+    <header class="text-center">
+        <div class="header-1 alert alert-secondary" role="alert">
+            <h3 class="text">@Loc["WelcomeToTheESignPortal"]</h3>
+        </div>
+
+        <div class="icon locked @(IsTfa ? "tfa" : "") mt-4 mb-1">
+            <svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" fill="currentColor"
+                 class="bi bi-shield-lock" viewBox="0 0 16 16">
+                <path d="M5.338 1.59a61 61 0 0 0-2.837.856.48.48 0 0 0-.328.39c-.554 4.157.726 7.19 2.253 9.188a10.7 10.7 0 0 0 2.287 2.233c.346.244.652.42.893.533q.18.085.293.118a1 1 0 0 0 .101.025 1 1 0 0 0 .1-.025q.114-.034.294-.118c.24-.113.547-.29.893-.533a10.7 10.7 0 0 0 2.287-2.233c1.527-1.997 2.807-5.031 2.253-9.188a.48.48 0 0 0-.328-.39c-.651-.213-1.75-.56-2.837-.855C9.552 1.29 8.531 1.067 8 1.067c-.53 0-1.552.223-2.662.524zM5.072.56C6.157.265 7.31 0 8 0s1.843.265 2.928.56c1.11.3 2.229.655 2.887.87a1.54 1.54 0 0 1 1.044 1.262c.596 4.477-.787 7.795-2.465 9.99a11.8 11.8 0 0 1-2.517 2.453 7 7 0 0 1-1.048.625c-.28.132-.581.24-.829.24s-.548-.108-.829-.24a7 7 0 0 1-1.048-.625 11.8 11.8 0 0 1-2.517-2.453C1.928 10.487.545 7.169 1.141 2.692A1.54 1.54 0 0 1 2.185 1.43 63 63 0 0 1 5.072.56" />
+                <path d="M9.5 6.5a1.5 1.5 0 0 1-1 1.415l.385 1.99a.5.5 0 0 1-.491.595h-.788a.5.5 0 0 1-.49-.595l.384-1.99a1.5 1.5 0 1 1 2-1.415" />
+            </svg>
+        </div>
+        <h1>@Loc[$"LockedTitle{CodeKey}"]</h1>
+    </header>
+
+    @* — "Set up authenticator" hint, shown only on the authenticator step — *@
+    @if (IsAuthenticator)
+    {
+        <section class="text-center">
+            <p class="m-0 p-0">
+                @Loc["AuthenticatorSetup_Prefix"]
+                <a class="icon-link m-0 p-0" href="@($"/tfa/{EnvelopeKey}")" target="_blank" style="text-decoration:none">
+                    @Loc["AuthenticatorSetup_Link"] <i class="bi bi-box-arrow-up-right"></i>
+                </a>
+                @Loc["AuthenticatorSetup_Suffix"]
+            </p>
+        </section>
+    }
+
+    <section class="text-center">
+        <p>@Loc[$"LockedBody{CodeKey}"]</p>
+    </section>
+
+    <div class="row m-0 p-0">
+        <div class="access-code-panel justify-content-center align-items-center p-0 m-0">
+            <EditForm Model="this" OnValidSubmit="HandleSubmit" Context="editContext"
+                      id="form-access-code" class="form form-floating mb-0">
+                <div class="form-floating access-code-form-floating">
+
+                    <input id="access_code" type="password" class="form-control"
+                           placeholder="@Loc[$"LockedCodeLabel{CodeKey}"]"
+                           @bind="Code" @bind:event="oninput"
+                           disabled="@_submitting" required />
+                    <label for="access_code">@Loc[$"LockedCodeLabel{CodeKey}"]</label>
+
+                    <DxButton SubmitFormOnClick="true" Enabled="@(!_submitting)"
+                              RenderStyle="ButtonRenderStyle.Primary"
+                              CssClass="btn btn-primary">
+                        <span class="material-symbols-outlined">login</span>
+                    </DxButton>
+
+                    @if (ShowSmsToggle)
+                    {
+                        <div class="form-check form-switch tfa-sms">
+                            <input class="form-check-input" type="checkbox" role="switch"
+                                   id="flexSwitchCheckChecked"
+                                   @bind="PreferSms"
+                                   disabled="@(!State.Current!.HasPhoneNumber)" />
+                            <label class="form-check-label" for="flexSwitchCheckChecked">2FA per SMS</label>
+                        </div>
+                    }
+
+                    @if (IsSms && _smsRemaining is not null)
+                    {
+                        <div id="sms-timer" class="alert alert-primary" role="alert">@_smsRemaining</div>
+                    }
+                </div>
+            </EditForm>
+        </div>
+    </div>
+
+    @if (!string.IsNullOrEmpty(State.Current?.ErrorMessage))
+    {
+        <div id="access-code-error-message" class="alert alert-danger row" role="alert">
+            @State.Current.ErrorMessage
+        </div>
+    }
+
+    <section class="no-receiver-explanation text-center">
+        <details>
+            <summary>@Loc[$"LockedFooterTitle{CodeKey}"]</summary>
+            <p>
+                @Loc.Format($"LockedFooterBody{CodeKey}",
+                    State.Current?.SenderEmail ?? string.Empty,
+                    $"Envelope - {State.Current?.Title}",
+                    string.Empty)
+            </p>
+        </details>
+    </section>
+</div>
+
+@code {
+    [Parameter] public string EnvelopeKey { get; set; } = string.Empty;
+
+    private string Code { get; set; } = string.Empty;
+    private bool PreferSms { get; set; }
+    private bool _submitting;
+    private System.Threading.Timer? _smsTimer;
+    private string? _smsRemaining;
+
+    // — Mode helpers ????????????????????????????????????????????????
+    private bool IsAccessCodeStep => State.Current?.Status == ReceiverAuthStatus.RequiresAccessCode;
+    private bool IsTfa            => State.Current?.Status == ReceiverAuthStatus.RequiresTfa;
+    private bool IsSms            => IsTfa && State.Current?.TfaType == "sms";
+    private bool IsAuthenticator  => IsTfa && State.Current?.TfaType == "authenticator";
+
+    /// <summary>
+    /// Mirrors the legacy view's "codeKeyName" suffix used to pick the right
+    /// resource string ("LockedTitleAccess", "LockedTitleSms", ...).
+    /// </summary>
+    private string CodeKey => IsSms ? "Sms" : IsAuthenticator ? "Authenticator" : "Access";
+
+    private bool ShowSmsToggle =>
+        IsAccessCodeStep
+        && (State.Current?.TfaEnabled ?? false);
+
+    protected override async Task OnInitializedAsync()
+    {
+        await Loc.EnsureLoadedAsync();
+        State.Changed += OnStateChanged;
+        ResetSmsTimer();
+    }
+
+    private void OnStateChanged()
+    {
+        ResetSmsTimer();
+        InvokeAsync(StateHasChanged);
+    }
+
+    private async Task HandleSubmit()
+    {
+        if (_submitting || string.IsNullOrWhiteSpace(Code))
+            return;
+
+        _submitting = true;
+        try
+        {
+            ReceiverAuthResponse? res;
+            if (IsAccessCodeStep)
+            {
+                res = await Api.SubmitAccessCodeAsync(EnvelopeKey, new AccessCodeRequest
+                {
+                    AccessCode = Code,
+                    PreferSms  = PreferSms
+                });
+            }
+            else // TFA step
+            {
+                res = await Api.SubmitTfaCodeAsync(EnvelopeKey, new TfaCodeRequest
+                {
+                    Code = Code,
+                    Type = State.Current?.TfaType ?? "authenticator"
+                });
+            }
+
+            Code = string.Empty;
+            State.Set(EnvelopeKey, res);
+        }
+        finally
+        {
+            _submitting = false;
+        }
+    }
+
+    // — SMS countdown ???????????????????????????????????????????????
+    private void ResetSmsTimer()
+    {
+        _smsTimer?.Dispose();
+        _smsTimer = null;
+        _smsRemaining = null;
+
+        if (!IsSms || State.Current?.TfaExpiration is not DateTime exp)
+            return;
+
+        UpdateRemaining(exp);
+        _smsTimer = new System.Threading.Timer(_ =>
+        {
+            UpdateRemaining(exp);
+            InvokeAsync(StateHasChanged);
+        }, null, 1000, 1000);
+    }
+
+    private void UpdateRemaining(DateTime expiration)
+    {
+        var diff = expiration - DateTime.Now;
+        if (diff <= TimeSpan.Zero)
+        {
+            _smsRemaining = "00:00";
+            _smsTimer?.Dispose();
+            _smsTimer = null;
+            return;
+        }
+        _smsRemaining = $"{(int)diff.TotalMinutes:00}:{diff.Seconds:00}";
+    }
+
+    public void Dispose()
+    {
+        State.Changed -= OnStateChanged;
+        _smsTimer?.Dispose();
+    }
+}
+

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopeNotFound.razor

@@ -0,0 +1,24 @@
+@page "/envelope-not-found"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject LocalizationService Loc
+
+@*
+    Counterpart of the "EnvelopeNotFound" view (rendered by
+    EnvelopeGenerator.Web.Extensions.ViewExtensions.ViewEnvelopeNotFound()).
+*@
+
+<PageTitle>@Loc["EnvelopeNotFoundTitle"]</PageTitle>
+
+<div class="page container p-5">
+    <header class="text-center">
+        <h1>@Loc["EnvelopeNotFoundTitle"]</h1>
+    </header>
+    <section class="text-center">
+        <p>@Loc["EnvelopeNotFoundBody"]</p>
+    </section>
+</div>
+
+@code {
+    protected override async Task OnInitializedAsync() => await Loc.EnsureLoadedAsync();
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopePage.razor

@@ -0,0 +1,110 @@
+@page "/envelope/{Key}"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject ReceiverApiClient Api
+@inject ReceiverAuthState State
+@inject LocalizationService Loc
+@inject NavigationManager Nav
+
+@*
+    Counterpart of EnvelopeGenerator.Web/Controllers/EnvelopeController.Main.
+
+    Behavior:
+      1. Calls GET /api/receiverauth/{key}/status.
+      2. Routes to a sub-view based on the response Status:
+         - requires_access_code / requires_tfa ? EnvelopeLockedView (Phase 3)
+         - show_document                       ? ShowEnvelopeView    (Phase 4)
+         - already_signed                      ? /envelope-signed
+         - rejected                            ? /envelope-rejected
+         - not_found                           ? /envelope-not-found
+         - expired                             ? /envelope-expired
+         - error                               ? inline error banner
+
+    Sub-views are simple placeholders here; they are filled with real UI
+    in later phases. The routing skeleton just needs to compile and
+    transition correctly.
+*@
+
+<PageTitle>@(Auth?.Title ?? Loc["SignDoc"])</PageTitle>
+
+@if (_loading)
+{
+    <div class="page container p-5 text-center">
+        <DxLoadingPanel Visible="true" IsContentBlocked="false" ApplyBackgroundShading="false" />
+    </div>
+}
+else if (Auth is null)
+{
+    <div class="page container p-5 text-center">
+        <p class="alert alert-danger">@Loc["UnexpectedErrorTitle"]</p>
+    </div>
+}
+else
+{
+    switch (Auth.Status)
+    {
+        case ReceiverAuthStatus.RequiresAccessCode:
+        case ReceiverAuthStatus.RequiresTfa:
+            <EnvelopeLockedView EnvelopeKey="@Key" />
+            break;
+
+        case ReceiverAuthStatus.ShowDocument:
+            <ShowEnvelopeView EnvelopeKey="@Key" />
+            break;
+
+        default:
+            <div class="page container p-5 text-center">
+                <p class="alert alert-warning">@(Auth.ErrorMessage ?? Loc["UnexpectedErrorTitle"])</p>
+            </div>
+            break;
+    }
+}
+
+@code {
+    [Parameter] public string Key { get; set; } = string.Empty;
+
+    private bool _loading = true;
+    private ReceiverAuthResponse? Auth => State.Current;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await Loc.EnsureLoadedAsync();
+        State.Changed += OnStateChanged;
+    }
+
+    protected override async Task OnParametersSetAsync()
+    {
+        // Re-fetch status if the route key changed or no response loaded yet.
+        if (State.EnvelopeKey != Key || State.Current is null)
+        {
+            _loading = true;
+            var res = await Api.GetStatusAsync(Key);
+            State.Set(Key, res);
+            RedirectIfTerminal(res);
+            _loading = false;
+        }
+        else
+        {
+            _loading = false;
+        }
+    }
+
+    private void RedirectIfTerminal(ReceiverAuthResponse? res)
+    {
+        if (res is null) return;
+        var target = res.Status switch
+        {
+            ReceiverAuthStatus.AlreadySigned => "/envelope-signed",
+            ReceiverAuthStatus.Rejected      => "/envelope-rejected",
+            ReceiverAuthStatus.NotFound      => "/envelope-not-found",
+            ReceiverAuthStatus.Expired       => "/envelope-expired",
+            _ => null
+        };
+        if (target is not null)
+            Nav.NavigateTo(target, replace: true);
+    }
+
+    private void OnStateChanged() => InvokeAsync(StateHasChanged);
+
+    public void Dispose() => State.Changed -= OnStateChanged;
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopeRejected.razor

@@ -0,0 +1,39 @@
+@page "/envelope-rejected"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject ReceiverAuthState State
+@inject LocalizationService Loc
+
+@*
+    Counterpart of Views/Envelope/EnvelopeRejected.cshtml.
+    Reads envelope title / sender info from the cached auth response,
+    which is populated by EnvelopePage before navigation occurs.
+*@
+
+<PageTitle>@Loc["DocRejected"]</PageTitle>
+
+<div class="page container p-5">
+    <header class="text-center">
+        <div class="icon rejected"></div>
+        <h1>@Loc["RejectionInfo1"]</h1>
+    </header>
+    <section class="text-center">
+        <small class="text-body-secondary">
+            @(Loc["RejectionInfo2"])
+        </small>
+        @if (State.Current is not null)
+        {
+            <p class="mt-3">
+                <strong>@State.Current.Title</strong>
+                @if (!string.IsNullOrEmpty(State.Current.SenderEmail))
+                {
+                    <span> — <a href="mailto:@State.Current.SenderEmail">@State.Current.SenderEmail</a></span>
+                }
+            </p>
+        }
+    </section>
+</div>
+
+@code {
+    protected override async Task OnInitializedAsync() => await Loc.EnsureLoadedAsync();
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/EnvelopeSigned.razor

@@ -0,0 +1,31 @@
+@page "/envelope-signed"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject LocalizationService Loc
+
+@*
+    Counterpart of Views/Envelope/EnvelopeSigned.cshtml.
+    Full styling (icon + section card) is migrated in Phase 6.
+*@
+
+<PageTitle>@Loc["DocumentSuccessfullySigned"]</PageTitle>
+
+<div class="page container p-5">
+    <header class="text-center">
+        <div class="icon signed">
+            <svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" fill="currentColor"
+                 class="bi bi-check2-circle" viewBox="0 0 16 16">
+                <path d="M2.5 8a5.5 5.5 0 0 1 8.25-4.764.5.5 0 0 0 .5-.866A6.5 6.5 0 1 0 14.5 8a.5.5 0 0 0-1 0 5.5 5.5 0 1 1-11 0z" />
+                <path d="M15.354 3.354a.5.5 0 0 0-.708-.708L8 9.293 5.354 6.646a.5.5 0 1 0-.708.708l3 3a.5.5 0 0 0 .708 0l7-7z" />
+            </svg>
+        </div>
+        <h1>@Loc["DocumentSuccessfullySigned"]</h1>
+    </header>
+    <section class="text-center">
+        <p>@Loc["DocumentSignedConfirmationMessage"]</p>
+    </section>
+</div>
+
+@code {
+    protected override async Task OnInitializedAsync() => await Loc.EnsureLoadedAsync();
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/Error404.razor

@@ -0,0 +1,88 @@
+@page "/error404"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject LocalizationService Loc
+@inject NavigationManager Nav
+@inject IJSRuntime JS
+
+@*
+    Counterpart of HomeController.Error404 ? Views/Shared/_Error.cshtml.
+
+    The legacy view fully replaces the document with a black-space themed
+    layout. In Blazor we keep the receiver layout intact (so the user can
+    still reach the language switcher) and only scope error-space.css to
+    this page via <HeadContent>. JS animation (visor + cord) is initialized
+    once after the canvas elements are in the DOM.
+*@
+
+<HeadContent>
+    <link rel="stylesheet" href="/css/error-space.css" />
+</HeadContent>
+
+<PageTitle>404</PageTitle>
+
+<div class="error-space-stage" style="position:relative; height:80vh; overflow:hidden">
+    <div class="moon"></div>
+    <div class="moon__crater moon__crater1"></div>
+    <div class="moon__crater moon__crater2"></div>
+    <div class="moon__crater moon__crater3"></div>
+
+    <div class="star star1"></div>
+    <div class="star star2"></div>
+    <div class="star star3"></div>
+    <div class="star star4"></div>
+    <div class="star star5"></div>
+
+    <div class="error">
+        <div class="error__title">404</div>
+        <div class="error__subtitle">@Loc["PageNotFound"]</div>
+        <div class="error__description">@Loc["PageNotFoundDescription"]</div>
+        <a href="/" class="error__button error__button--active">@Loc["Home"]</a>
+    </div>
+
+    <div class="astronaut">
+        <div class="astronaut__backpack"></div>
+        <div class="astronaut__body"></div>
+        <div class="astronaut__body__chest"></div>
+        <div class="astronaut__arm-left1"></div>
+        <div class="astronaut__arm-left2"></div>
+        <div class="astronaut__arm-right1"></div>
+        <div class="astronaut__arm-right2"></div>
+        <div class="astronaut__arm-thumb-left"></div>
+        <div class="astronaut__arm-thumb-right"></div>
+        <div class="astronaut__leg-left"></div>
+        <div class="astronaut__leg-right"></div>
+        <div class="astronaut__foot-left"></div>
+        <div class="astronaut__foot-right"></div>
+        <div class="astronaut__wrist-left"></div>
+        <div class="astronaut__wrist-right"></div>
+
+        <div class="astronaut__cord">
+            <canvas id="cord" height="500" width="500"></canvas>
+        </div>
+
+        <div class="astronaut__head">
+            <canvas id="visor" width="60" height="60"></canvas>
+            <div class="astronaut__head-visor-flare1"></div>
+            <div class="astronaut__head-visor-flare2"></div>
+        </div>
+    </div>
+</div>
+
+@code {
+    protected override async Task OnInitializedAsync() => await Loc.EnsureLoadedAsync();
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (!firstRender) return;
+        try
+        {
+            const string js = "if (!window.__errSpaceLoaded) { window.__errSpaceLoaded = true; var s = document.createElement('script'); s.src = '/js/error-space.js'; document.body.appendChild(s); }";
+            await JS.InvokeVoidAsync("eval", js);
+        }
+        catch
+        {
+            // Animation is purely decorative — failing to load it is fine.
+        }
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/Home.razor

@@ -0,0 +1,42 @@
+@page "/"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject LocalizationService Loc
+
+<PageTitle>@Loc["Home"]</PageTitle>
+
+@*
+    Counterpart of EnvelopeGenerator.Web/Views/Home/Main.cshtml.
+
+    The legacy view animates the description with typed.js. The Blazor
+    version omits the typewriter effect because it adds another JS
+    dependency for marginal value; the static description is shown
+    instead. Custom company / app logos are loaded from /img/ if
+    available, otherwise gracefully hidden via onerror.
+*@
+
+<div class="page container py-4 px-4">
+    <header class="text-center">
+        <div class="header-1 alert alert-secondary" role="alert">
+            <h3 class="text">@Loc["WelcomeToTheESignPortal"]</h3>
+            <img class="dd-locked-logo" src="/img/company.svg"
+                 onerror="this.style.display='none'" alt="" />
+        </div>
+        <div class="icon mt-4 mb-1">
+            <img class="signFlow-logo" src="/img/sign_flow_horizontal.svg"
+                 onerror="this.style.display='none'" alt="signFLOW" />
+        </div>
+    </header>
+    <section class="text-center">
+        <div class="alert alert-light" role="alert">
+            <p class="home-description">@Loc["HomePageDescription"]</p>
+        </div>
+    </section>
+</div>
+
+@code {
+    protected override async Task OnInitializedAsync()
+    {
+        await Loc.EnsureLoadedAsync();
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/ShowEnvelopeView.razor

@@ -0,0 +1,461 @@
+@implements IDisposable
+@inject ReceiverApiClient Api
+@inject ReceiverAuthState State
+@inject LocalizationService Loc
+@inject NavigationManager Nav
+@inject ILogger<ShowEnvelopeView> Logger
+
+@*
+    Counterpart of EnvelopeGenerator.Web/Views/Envelope/ShowEnvelope.cshtml.
+
+    Sign flow (Phase 5):
+      • Document is rendered by DxPdfViewer for review.
+      • A side panel lists every signature placeholder the receiver has
+        to sign (GET /api/annotation/elements). Each entry opens
+        SignaturePadDialog to capture the signature image (+ optional
+        position / city) and stores the result locally.
+      • Complete validates that every placeholder is signed, then submits
+        the BlazorSignaturePayload (POST /api/annotation/blazor) and
+        navigates to /envelope-signed.
+      • Reset clears every captured signature locally (no server call).
+      • Reject and read-only share popups behave as in Phase 4.
+
+    Why a side-panel signing UX instead of overlaying widgets on the PDF?
+      • DevExpress DxPdfViewer does not expose a public surface for
+        programmatic widget annotations the way PSPDFKit did.
+      • A side panel is fully keyboard / screen-reader accessible, works
+        identically on mobile, and avoids fragile coordinate math against
+        DevExpress' internal DOM. The visual position on the PDF is still
+        communicated via the "Page P" badge per entry.
+*@
+
+<div class="envelope-view">
+
+    @* — Top toolbar / action buttons (desktop) — *@
+    @if (!IsReadOnly)
+    {
+        <div id="flex-action-panel" class="btn-group btn_group position-fixed bottom-0 end-0 d-flex align-items-center"
+             role="group">
+            <DxButton CssClass="btn_complete btn btn-success btn-desktop"
+                      Text="@Loc["Complete"]"
+                      Click="OnCompleteClick"
+                      Enabled="@(!_busy)" />
+            <DxButton CssClass="btn_reject btn btn-danger btn-desktop"
+                      Text="@Loc["Reject"]"
+                      Click="OnRejectClick"
+                      Enabled="@(!_busy)" />
+            <DxButton CssClass="btn_refresh btn btn-secondary btn-desktop"
+                      IconCssClass="bi bi-arrow-counterclockwise"
+                      Text="@Loc["Reset"]"
+                      Click="OnResetClick"
+                      Enabled="@(!_busy && _captured.Count > 0)" />
+        </div>
+    }
+
+    @* — Envelope info card — *@
+    <div class="dd-cards-container">
+        <div class="dd-card">
+            <div class="dd-card-preview">
+                <img src="/img/sign_flow_horizontal.svg" class="app-logo"
+                     onerror="this.style.display='none'" alt="signFLOW" />
+                @if (!IsReadOnly)
+                {
+                    <div class="progress-container">
+                        <div id="signed-count-bar" class="progress"></div>
+                        <span class="progress-text">
+                            <span id="signed-count">@SignedCount</span>/<span id="signature-count">@_elements.Count</span>
+                            @Loc["Signatures"]
+                        </span>
+                    </div>
+                }
+            </div>
+            <div class="dd-card-info">
+                <h2>@(State.Current?.Title)</h2>
+                @if (!string.IsNullOrEmpty(State.Current?.Message))
+                {
+                    <div class="markdown">@State.Current.Message</div>
+                }
+                @if (!string.IsNullOrEmpty(State.Current?.SenderEmail))
+                {
+                    <p>
+                        <small class="text-body-secondary">
+                            <a class="mail-link" href="mailto:@State.Current.SenderEmail">
+                                @State.Current.SenderEmail
+                            </a>
+                        </small>
+                    </p>
+                }
+            </div>
+        </div>
+    </div>
+
+    <div class="row g-3 m-0 envelope-content">
+
+        @* — PDF viewer — *@
+        <div class="col-12 col-lg-8 p-0">
+            <div id="pdfviewer-host" style="min-height:60vh; height:70vh;">
+                @if (_loadingDoc)
+                {
+                    <div class="d-flex align-items-center justify-content-center h-100">
+                        <DxLoadingPanel Visible="true" IsContentBlocked="false" ApplyBackgroundShading="false" />
+                    </div>
+                }
+                else if (_documentBytes is { Length: > 0 })
+                {
+                    <DxPdfViewer DocumentContent="_documentBytes"
+                                 CssClass="h-100 w-100"
+                                 ZoomLevel="1" />
+                }
+                else
+                {
+                    <div class="alert alert-warning m-3" role="alert">
+                        @Loc["DocumentNotFound"]
+                    </div>
+                }
+            </div>
+        </div>
+
+        @* — Side panel: signature placeholders to sign — *@
+        @if (!IsReadOnly)
+        {
+            <aside class="col-12 col-lg-4 p-3">
+                <h5>@Loc["SignaturePlaceholders"]</h5>
+                @if (_loadingElements)
+                {
+                    <DxLoadingPanel Visible="true" IsContentBlocked="false" ApplyBackgroundShading="false" />
+                }
+                else if (_elements.Count == 0)
+                {
+                    <p class="text-body-secondary">@Loc["NoSignatureRequired"]</p>
+                }
+                else
+                {
+                    <ol class="signature-list list-unstyled">
+                        @foreach (var (el, idx) in _elements.Select((e, i) => (e, i + 1)))
+                        {
+                            var signed = _captured.ContainsKey(el.Id);
+                            <li class="signature-item d-flex align-items-center justify-content-between gap-2 p-2 border rounded mb-2 @(signed ? "bg-success-subtle" : "")">
+                                <div>
+                                    <strong>#@idx</strong>
+                                    <span class="badge bg-secondary ms-1">@Loc["Page"] @el.Page</span>
+                                    @if (!string.IsNullOrEmpty(el.Tooltip))
+                                    {
+                                        <div class="small text-body-secondary">@el.Tooltip</div>
+                                    }
+                                    @if (signed)
+                                    {
+                                        <div class="small text-success">
+                                            <i class="bi bi-check2-circle"></i> @Loc["Signed"]
+                                        </div>
+                                    }
+                                </div>
+                                <DxButton Text="@(signed ? Loc["Change"] : Loc["Sign"])"
+                                          RenderStyle="@(signed ? ButtonRenderStyle.Secondary : ButtonRenderStyle.Primary)"
+                                          IconCssClass="bi bi-pen"
+                                          Click="@(() => OpenPadAsync(el))" />
+                            </li>
+                        }
+                    </ol>
+                }
+            </aside>
+        }
+    </div>
+
+    @* — Signature pad dialog — *@
+    <SignaturePadDialog @ref="_padDialog" Confirmed="OnSignatureConfirmed" />
+
+    @* — Confirm-complete popup — *@
+    <DxPopup @bind-Visible="_confirmCompleteVisible"
+             HeaderText="@Loc["ConfirmSigning"]"
+             ShowCloseButton="true"
+             Width="32rem">
+        <BodyContentTemplate Context="confirmCtx">
+            <p>@Loc["ConfirmSigningQ"]</p>
+        </BodyContentTemplate>
+        <FooterContentTemplate Context="confirmFootCtx">
+            <DxButton Text="@Loc["Confirm"]"
+                      RenderStyle="ButtonRenderStyle.Primary"
+                      Click="OnCompleteSubmit" Enabled="@(!_busy)" />
+            <DxButton Text="@Loc["Cancel"]"
+                      RenderStyle="ButtonRenderStyle.Secondary"
+                      Click="@(() => _confirmCompleteVisible = false)" />
+        </FooterContentTemplate>
+    </DxPopup>
+
+    @* — Read-only share popup — *@
+    @if (!IsReadOnly)
+    {
+        <DxPopup @bind-Visible="_shareVisible"
+                 HeaderText="@Loc["EnterRecipientToShareDocument"]"
+                 ShowCloseButton="true"
+                 Width="32rem">
+            <BodyContentTemplate Context="shareCtx">
+                <DxFormLayout>
+                    <DxFormLayoutItem Caption="@Loc["Email"]">
+                        <DxTextBox @bind-Text="_shareEmail" NullText="user@mail.com" />
+                    </DxFormLayoutItem>
+                    <DxFormLayoutItem Caption="@Loc["ValidUntil"]">
+                        <DxDateEdit @bind-Date="_shareValidUntil"
+                                    MinDate="DateTime.Today.AddDays(1)"
+                                    MaxDate="DateTime.Today.AddDays(90)" />
+                    </DxFormLayoutItem>
+                </DxFormLayout>
+                @if (!string.IsNullOrEmpty(_shareError))
+                {
+                    <div class="alert alert-danger mt-2">@_shareError</div>
+                }
+            </BodyContentTemplate>
+            <FooterContentTemplate Context="shareFootCtx">
+                <DxButton Text="@Loc["Send"]" RenderStyle="ButtonRenderStyle.Primary"
+                          IconCssClass="bi bi-send" Click="OnShareSubmit"
+                          Enabled="@(!_busy)" />
+            </FooterContentTemplate>
+        </DxPopup>
+
+        @* — Reject popup — *@
+        <DxPopup @bind-Visible="_rejectVisible"
+                 HeaderText="@Loc["Rejection"]"
+                 ShowCloseButton="true"
+                 Width="32rem">
+            <BodyContentTemplate Context="rejectCtx">
+                <p>@Loc["RejectionReasonQ"]</p>
+                <DxMemo @bind-Text="_rejectReason" Rows="4" />
+            </BodyContentTemplate>
+            <FooterContentTemplate Context="rejectFootCtx">
+                <DxButton Text="@Loc["Complete"]"
+                          RenderStyle="ButtonRenderStyle.Primary"
+                          Click="OnRejectSubmit" Enabled="@(!_busy)" />
+                <DxButton Text="@Loc["Back"]"
+                          RenderStyle="ButtonRenderStyle.Secondary"
+                          Click="@(() => _rejectVisible = false)" />
+            </FooterContentTemplate>
+        </DxPopup>
+    }
+
+    @if (!string.IsNullOrEmpty(_globalError))
+    {
+        <div class="alert alert-danger m-3" role="alert">@_globalError</div>
+    }
+</div>
+
+@code {
+    [Parameter] public string EnvelopeKey { get; set; } = string.Empty;
+
+    private byte[]? _documentBytes;
+    private bool _loadingDoc = true;
+    private bool _loadingElements = true;
+    private bool _busy;
+
+    private List<SignatureElementDto> _elements = new();
+    private readonly Dictionary<int, BlazorSignatureEntry> _captured = new();
+
+    private SignaturePadDialog? _padDialog;
+    private bool _confirmCompleteVisible;
+    private string? _globalError;
+
+    private bool _shareVisible;
+    private string _shareEmail = string.Empty;
+    private DateTime _shareValidUntil = DateTime.Today.AddDays(7);
+    private string? _shareError;
+
+    private bool _rejectVisible;
+    private string _rejectReason = string.Empty;
+
+    private bool IsReadOnly => State.Current?.ReadOnly ?? false;
+    private int SignedCount => _captured.Count;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await Loc.EnsureLoadedAsync();
+        State.Changed += OnStateChanged;
+    }
+
+    protected override async Task OnParametersSetAsync()
+    {
+        if (_documentBytes is null && !string.IsNullOrEmpty(EnvelopeKey))
+        {
+            await LoadDocumentAsync();
+            if (!IsReadOnly)
+                await LoadElementsAsync();
+        }
+    }
+
+    private async Task LoadDocumentAsync()
+    {
+        _loadingDoc = true;
+        try
+        {
+            _documentBytes = await Api.GetDocumentAsync(EnvelopeKey);
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Failed to load document for key {Key}", EnvelopeKey);
+        }
+        finally
+        {
+            _loadingDoc = false;
+        }
+    }
+
+    private async Task LoadElementsAsync()
+    {
+        _loadingElements = true;
+        try
+        {
+            _elements = await Api.GetSignatureElementsAsync();
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Failed to load signature elements.");
+            _elements = new();
+        }
+        finally
+        {
+            _loadingElements = false;
+        }
+    }
+
+    private void OnStateChanged() => InvokeAsync(StateHasChanged);
+
+    // — Signature pad ?????????????????????????????????????????????????
+
+    private async Task OpenPadAsync(SignatureElementDto el)
+    {
+        if (_padDialog is null) return;
+        _captured.TryGetValue(el.Id, out var existing);
+        await _padDialog.ShowAsync(el.Id, existing?.Position, existing?.City);
+    }
+
+    private void OnSignatureConfirmed(BlazorSignatureEntry entry)
+    {
+        _captured[entry.ElementId] = entry;
+        StateHasChanged();
+    }
+
+    // — Toolbar actions ????????????????????????????????????????????????
+
+    private Task OnCompleteClick()
+    {
+        _globalError = null;
+        var missing = _elements.Where(e => !_captured.ContainsKey(e.Id)).ToList();
+        if (missing.Count > 0)
+        {
+            _globalError = Loc.Format("MissingSignaturesFmt", missing.Count);
+            return Task.CompletedTask;
+        }
+        _confirmCompleteVisible = true;
+        return Task.CompletedTask;
+    }
+
+    private async Task OnCompleteSubmit()
+    {
+        if (_busy) return;
+        _busy = true;
+        try
+        {
+            var payload = new BlazorSignaturePayload
+            {
+                Signatures = _captured.Values.ToList()
+            };
+            var status = await Api.SignBlazorAsync(payload);
+            _confirmCompleteVisible = false;
+            if ((int)status >= 200 && (int)status < 300)
+            {
+                Nav.NavigateTo("/envelope-signed", replace: true);
+            }
+            else
+            {
+                _globalError = $"{Loc["UnexpectedErrorTitle"]} ({(int)status})";
+            }
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError(ex, "Sign submit failed.");
+            _globalError = Loc["UnexpectedErrorTitle"];
+        }
+        finally
+        {
+            _busy = false;
+        }
+    }
+
+    private Task OnRejectClick()
+    {
+        _rejectReason = string.Empty;
+        _rejectVisible = true;
+        return Task.CompletedTask;
+    }
+
+    private async Task OnRejectSubmit()
+    {
+        if (_busy) return;
+        _busy = true;
+        try
+        {
+            var ok = await Api.RejectAsync(_rejectReason ?? string.Empty);
+            _rejectVisible = false;
+            if (ok)
+                Nav.NavigateTo("/envelope-rejected", replace: true);
+        }
+        finally
+        {
+            _busy = false;
+        }
+    }
+
+    private void OnResetClick()
+    {
+        _captured.Clear();
+        _globalError = null;
+    }
+
+    // — Share read-only ?????????????????????????????????????????????????
+
+    private async Task OnShareSubmit()
+    {
+        _shareError = null;
+        if (string.IsNullOrWhiteSpace(_shareEmail) ||
+            !System.Text.RegularExpressions.Regex.IsMatch(_shareEmail, @"^\S+@\S+\.\S+$"))
+        {
+            _shareError = Loc["ShrEnvInvalidEmailText"];
+            return;
+        }
+        if (_shareValidUntil < DateTime.Today.AddDays(1))
+        {
+            _shareError = Loc["ShrEnvInvalidDateText"];
+            return;
+        }
+
+        _busy = true;
+        try
+        {
+            var ok = await Api.ShareReadOnlyAsync(new ReadOnlyShareRequest
+            {
+                ReceiverMail = _shareEmail,
+                DateValid = _shareValidUntil
+            });
+            if (ok)
+            {
+                _shareVisible = false;
+                _shareEmail = string.Empty;
+                _shareValidUntil = DateTime.Today.AddDays(7);
+            }
+            else
+            {
+                _shareError = Loc["ShrEnvOperationFailedText"];
+            }
+        }
+        catch
+        {
+            _shareError = Loc["UnexpectedErrorTitle"];
+        }
+        finally
+        {
+            _busy = false;
+        }
+    }
+
+    public void Dispose() => State.Changed -= OnStateChanged;
+}
+
+

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/SignaturePadDialog.razor

@@ -0,0 +1,150 @@
+@implements IAsyncDisposable
+@inject IJSRuntime JS
+@inject LocalizationService Loc
+
+@*
+    Modal dialog that captures one signature for a single placeholder.
+
+    The user is asked to:
+      • draw their signature (mouse / touch),
+      • optionally fill in "position" (job title) and "city",
+      • confirm — which produces a BlazorSignatureEntry and closes the dialog.
+
+    The drawing surface is a plain HTML5 canvas wired up by signature-pad.js
+    (loaded once in App.razor). All JS interop is encapsulated here so the
+    rest of the receiver UI is free of DOM concerns.
+*@
+
+<DxPopup @bind-Visible="_visible"
+         HeaderText="@Loc["YourSignature"]"
+         ShowCloseButton="true"
+         CloseOnEscape="true"
+         Width="36rem"
+         Closed="OnClosed">
+    <BodyContentTemplate Context="padCtx">
+        <div class="signature-pad-container">
+            <canvas id="@_canvasId"
+                    class="signature-pad-canvas"
+                    style="width:100%; height:200px; border:1px solid #cfd6dd; border-radius:.25rem; background:#fff; touch-action:none"></canvas>
+
+            <div class="d-flex gap-2 mt-2">
+                <DxButton Text="@Loc["Clear"]"
+                          RenderStyle="ButtonRenderStyle.Secondary"
+                          IconCssClass="bi bi-eraser"
+                          Click="ClearAsync" />
+            </div>
+
+            <div class="mt-3">
+                <DxFormLayout>
+                    <DxFormLayoutItem Caption="@Loc["Position"]">
+                        <DxTextBox @bind-Text="_position" NullText="@Loc["PositionPlaceholder"]" />
+                    </DxFormLayoutItem>
+                    <DxFormLayoutItem Caption="@Loc["City"]">
+                        <DxTextBox @bind-Text="_city" NullText="@Loc["CityPlaceholder"]" />
+                    </DxFormLayoutItem>
+                </DxFormLayout>
+            </div>
+
+            @if (!string.IsNullOrEmpty(_error))
+            {
+                <div class="alert alert-danger mt-2 mb-0">@_error</div>
+            }
+        </div>
+    </BodyContentTemplate>
+    <FooterContentTemplate Context="footCtx">
+        <DxButton Text="@Loc["Confirm"]"
+                  RenderStyle="ButtonRenderStyle.Primary"
+                  IconCssClass="bi bi-check2"
+                  Click="ConfirmAsync" />
+        <DxButton Text="@Loc["Cancel"]"
+                  RenderStyle="ButtonRenderStyle.Secondary"
+                  Click="@(() => Hide())" />
+    </FooterContentTemplate>
+</DxPopup>
+
+@code {
+    /// <summary>Fired when the user confirms a valid signature.</summary>
+    [Parameter] public EventCallback<BlazorSignatureEntry> Confirmed { get; set; }
+
+    private readonly string _canvasId = $"sigpad_{Guid.NewGuid():N}";
+    private bool _visible;
+    private bool _attached;
+    private int _elementId;
+    private string _position = string.Empty;
+    private string _city = string.Empty;
+    private string? _error;
+
+    /// <summary>Opens the dialog and binds JS interop on the canvas.</summary>
+    public async Task ShowAsync(int elementId, string? defaultPosition = null, string? defaultCity = null)
+    {
+        _elementId = elementId;
+        _position  = defaultPosition ?? string.Empty;
+        _city      = defaultCity     ?? string.Empty;
+        _error     = null;
+        _visible   = true;
+        StateHasChanged();
+
+        // The canvas only exists after the popup is rendered. Wait one
+        // render cycle, then attach the pad.
+        await Task.Yield();
+        try
+        {
+            _attached = await JS.InvokeAsync<bool>("signaturePad.attach", _canvasId);
+        }
+        catch (JSException ex)
+        {
+            _error = ex.Message;
+            _attached = false;
+        }
+    }
+
+    public void Hide()
+    {
+        _visible = false;
+    }
+
+    private async Task ClearAsync()
+    {
+        if (_attached)
+            await JS.InvokeVoidAsync("signaturePad.clear", _canvasId);
+    }
+
+    private async Task ConfirmAsync()
+    {
+        if (!_attached)
+        {
+            _error = Loc["SignaturePadNotReady"];
+            return;
+        }
+
+        var dataUrl = await JS.InvokeAsync<string?>("signaturePad.toDataUrl", _canvasId);
+        if (string.IsNullOrEmpty(dataUrl))
+        {
+            _error = Loc["SignatureRequired"];
+            return;
+        }
+
+        await Confirmed.InvokeAsync(new BlazorSignatureEntry
+        {
+            ElementId        = _elementId,
+            SignatureDataUrl = dataUrl,
+            Position         = string.IsNullOrWhiteSpace(_position) ? null : _position.Trim(),
+            City             = string.IsNullOrWhiteSpace(_city)     ? null : _city.Trim(),
+            SignedAt         = DateTime.Now,
+        });
+
+        await OnClosed();
+        _visible = false;
+    }
+
+    private async Task OnClosed()
+    {
+        if (_attached)
+        {
+            try { await JS.InvokeVoidAsync("signaturePad.detach", _canvasId); } catch { /* ignore */ }
+            _attached = false;
+        }
+    }
+
+    public async ValueTask DisposeAsync() => await OnClosed();
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Receiver/TfaRegistration.razor

@@ -0,0 +1,158 @@
+@page "/tfa/{Key}"
+@layout EnvelopeGenerator.ReceiverUI.Web.Client.Layout.ReceiverLayout
+@rendermode InteractiveAuto
+@inject ReceiverApiClient Api
+@inject LocalizationService Loc
+@inject NavigationManager Nav
+
+@*
+    Counterpart of TFARegController.Reg ? Views/TFAReg/Reg.cshtml.
+
+    The legacy view uses Bootstrap's collapse-based accordion to walk the
+    receiver through 3 steps:
+      1. Install an authenticator app
+      2. Scan the QR code
+      3. Verify the generated 6-digit code
+
+    The Blazor port keeps the exact same step structure but uses
+    DxAccordion so the visual / keyboard behavior matches the rest of
+    the receiver UI. The TOTP QR and registration deadline are fetched
+    from <c>GET /api/tfa/{key}</c> on first render.
+*@
+
+<PageTitle>@Loc["TfaRegistration"]</PageTitle>
+
+<div class="page container p-5">
+    <header class="text-center">
+        <div class="icon locked mt-4 mb-1">
+            <svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" fill="currentColor"
+                 class="bi bi-shield-lock" viewBox="0 0 16 16">
+                <path d="M5.338 1.59a61 61 0 0 0-2.837.856.48.48 0 0 0-.328.39c-.554 4.157.726 7.19 2.253 9.188a10.7 10.7 0 0 0 2.287 2.233c.346.244.652.42.893.533q.18.085.293.118a1 1 0 0 0 .101.025 1 1 0 0 0 .1-.025q.114-.034.294-.118c.24-.113.547-.29.893-.533a10.7 10.7 0 0 0 2.287-2.233c1.527-1.997 2.807-5.031 2.253-9.188a.48.48 0 0 0-.328-.39c-.651-.213-1.75-.56-2.837-.855C9.552 1.29 8.531 1.067 8 1.067c-.53 0-1.552.223-2.662.524zM5.072.56C6.157.265 7.31 0 8 0s1.843.265 2.928.56c1.11.3 2.229.655 2.887.87a1.54 1.54 0 0 1 1.044 1.262c.596 4.477-.787 7.795-2.465 9.99a11.8 11.8 0 0 1-2.517 2.453 7 7 0 0 1-1.048.625c-.28.132-.581.24-.829.24s-.548-.108-.829-.24a7 7 0 0 1-1.048-.625 11.8 11.8 0 0 1-2.517-2.453C1.928 10.487.545 7.169 1.141 2.692A1.54 1.54 0 0 1 2.185 1.43 63 63 0 0 1 5.072.56" />
+                <path d="M9.5 6.5a1.5 1.5 0 0 1-1 1.415l.385 1.99a.5.5 0 0 1-.491.595h-.788a.5.5 0 0 1-.49-.595l.384-1.99a1.5 1.5 0 1 1 2-1.415" />
+            </svg>
+        </div>
+        <h2 class="mb-0">2-Factor Authentication (2FA)</h2>
+        <h2>@Loc["Registration"]</h2>
+    </header>
+
+    @if (_loading)
+    {
+        <div class="text-center mt-4">
+            <DxLoadingPanel Visible="true" IsContentBlocked="false" ApplyBackgroundShading="false" />
+        </div>
+    }
+    else if (_error is not null)
+    {
+        <div class="alert alert-danger mt-4" role="alert">@_error</div>
+        <div class="text-center mt-3">
+            <DxButton Text="@Loc["Back"]"
+                      RenderStyle="ButtonRenderStyle.Secondary"
+                      Click="@(() => Nav.NavigateTo($"/envelope/{Key}"))" />
+        </div>
+    }
+    else if (_data is not null)
+    {
+        <section class="text-center">
+            <p class="p-0 m-0">
+                @if (_data.TfaRegDeadline is DateTime dl)
+                {
+                    @Loc.Format("PageVisibleUntil", dl.ToString("d. MMM, HH:mm", new System.Globalization.CultureInfo("de-DE")))
+                }
+            </p>
+        </section>
+
+        <section class="text-start mt-4">
+            <DxAccordion>
+                <Items>
+                    <DxAccordionItem Text="@Loc["Step1Download2faApplication"]" Expanded="true">
+                        <ContentTemplate>
+                            <p class="text-wrap fw-medium">@Loc["Download2faAppInstruction"]</p>
+                            <p class="text-wrap fw-light">@Loc["Recommended2faApplications"]</p>
+                            <ul class="list-group text-start">
+                                <li class="list-group-item">
+                                    <a href="https://support.google.com/accounts/answer/1066447?hl=de&co=GENIE.Platform%3DAndroid"
+                                       target="_blank" rel="noopener" style="text-decoration:none">
+                                        <samp>Google Authenticator</samp>
+                                    </a>
+                                </li>
+                                <li class="list-group-item">
+                                    <a href="https://support.microsoft.com/de-de/account-billing/microsoft-authenticator-herunterladen-351498fc-850a-45da-b7b6-27e523b8702a"
+                                       target="_blank" rel="noopener" style="text-decoration:none">
+                                        <samp>Microsoft Authenticator</samp>
+                                    </a>
+                                </li>
+                            </ul>
+                        </ContentTemplate>
+                    </DxAccordionItem>
+
+                    <DxAccordionItem Text="@Loc["Step2ScanQrCode"]">
+                        <ContentTemplate>
+                            <div class="text-center m-0 p-0">
+                                @if (!string.IsNullOrEmpty(_data.TotpQR64))
+                                {
+                                    <img class="tfaQrCode"
+                                         src="@($"data:image/png;base64,{_data.TotpQR64}")"
+                                         alt="TOTP QR" />
+                                }
+                            </div>
+                            <p class="text-wrap fw-medium">@Loc["ScanQrCodeInstruction"]</p>
+                        </ContentTemplate>
+                    </DxAccordionItem>
+
+                    <DxAccordionItem Text="@Loc["Step3VerifyTheCode"]">
+                        <ContentTemplate>
+                            <p class="text-wrap fw-medium">
+                                @Loc["VerifyCodeInstructionMain"]
+                                <samp>@Loc["VerifyCodeInstructionSubmit"]</samp>.
+                            </p>
+                            <div class="text-center mt-3">
+                                <DxButton Text="@Loc["BackToEnvelope"]"
+                                          RenderStyle="ButtonRenderStyle.Primary"
+                                          Click="@(() => Nav.NavigateTo($"/envelope/{Key}"))" />
+                            </div>
+                        </ContentTemplate>
+                    </DxAccordionItem>
+                </Items>
+            </DxAccordion>
+        </section>
+    }
+</div>
+
+@code {
+    [Parameter] public string Key { get; set; } = string.Empty;
+
+    private TfaRegistrationResponse? _data;
+    private string? _error;
+    private bool _loading = true;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await Loc.EnsureLoadedAsync();
+
+        _loading = true;
+        try
+        {
+            var (data, status) = await Api.GetTfaRegistrationAsync(Key);
+            if ((int)status >= 200 && (int)status < 300 && data is not null)
+            {
+                _data = data;
+            }
+            else if ((int)status == 410)
+            {
+                _error = Loc["TfaRegDeadlineExpired"];
+            }
+            else if ((int)status == 401)
+            {
+                _error = Loc["UnauthorizedTfaReg"];
+            }
+            else
+            {
+                _error = Loc["UnexpectedErrorTitle"];
+            }
+        }
+        finally
+        {
+            _loading = false;
+        }
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Pages/Weather.razor

@@ -0,0 +1,32 @@
+@page "/weather"
+
+<PageTitle>Weather</PageTitle>
+
+<h1>Weather</h1>
+
+<DxGrid Data="@forecasts">
+    <Columns>
+        <DxGridDataColumn Caption="Date" FieldName="Date" />
+        <DxGridDataColumn Caption="Temperature (C)" FieldName="TemperatureC" />
+        <DxGridDataColumn Caption="Temperature (F)" FieldName="TemperatureF" />
+        <DxGridDataColumn Caption="Summary" FieldName="Summary" />
+    </Columns>
+</DxGrid>
+
+@code {
+    private WeatherForecast[]? forecasts;
+
+    protected override async Task OnInitializedAsync() {
+        DateOnly startDate = DateOnly.FromDateTime(DateTime.Now);
+        string[] summaries = ["Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"];
+        forecasts = Enumerable.Range(1, 5).Select(index => new WeatherForecast(
+                Date: startDate.AddDays(index),
+                TemperatureC: Random.Shared.Next(-20, 55),
+                Summary: summaries[Random.Shared.Next(summaries.Length)]
+            )).ToArray();
+    }
+
+    private record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary) {
+        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Program.cs

@@ -0,0 +1,31 @@
+using EnvelopeGenerator.ReceiverUI.Web.Client.Api;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Services;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Utils;
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+
+var builder = WebAssemblyHostBuilder.CreateDefault(args);
+
+builder.Services.AddDevExpressBlazor(options =>
+{
+    options.SizeMode = DevExpress.Blazor.SizeMode.Medium;
+});
+
+builder.Services.AddChatClient(builder.HostEnvironment.BaseAddress + "api/chat", "proxykey", "proxychat");
+
+builder.Services.AddDevExpressWebAssemblyBlazorPdfViewer();
+
+DevExpress.XtraPrinting.PrintingOptions.Pdf.RenderingEngine = DevExpress.XtraPrinting.XRPdfRenderingEngine.Skia;
+
+// ── Receiver API + Auth + Localization ─────────────────────────────
+// Same-origin HttpClient: the BFF (EnvelopeGenerator.ReceiverUI.Web)
+// reverse-proxies /api/** to EnvelopeGenerator.API and forwards the
+// HttpOnly authentication cookie automatically.
+builder.Services.AddHttpClient<ReceiverApiClient>(client =>
+{
+    client.BaseAddress = new Uri(builder.HostEnvironment.BaseAddress);
+});
+builder.Services.AddScoped<LocalizationService>();
+builder.Services.AddScoped<ReceiverAuthState>();
+
+await builder.Build().RunAsync();
+

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Routes.razor

@@ -0,0 +1,14 @@
+<Router AppAssembly="typeof(Program).Assembly">
+    <Found Context="routeData">
+        <RouteView RouteData="routeData" DefaultLayout="typeof(Layout.MainLayout)" />
+    </Found>
+    <NotFound>
+        @*
+            Mirrors HomeController.Error404 from EnvelopeGenerator.Web,
+            which maps fallback requests to the Error404 view.
+        *@
+        <LayoutView Layout="@typeof(Layout.ReceiverLayout)">
+            <Pages.Receiver.Error404 />
+        </LayoutView>
+    </NotFound>
+</Router>

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Services/LocalizationService.cs

@@ -0,0 +1,119 @@
+using EnvelopeGenerator.ReceiverUI.Web.Client.Api;
+
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Services;
+
+/// <summary>
+/// Pulls all localized strings from the API once and exposes them
+/// via an indexer mimicking <c>IStringLocalizer&lt;Resource&gt;["Key"]</c>
+/// in the legacy MVC Web project.
+///
+/// Missing keys fall back to the key itself (matching the previous behavior
+/// where <c>_localizer["X"].Value</c> returned "X" if not found).
+///
+/// Components consume this service as a scoped dependency and may call
+/// <see cref="EnsureLoadedAsync"/> in <c>OnInitializedAsync</c>.
+/// </summary>
+public class LocalizationService
+{
+    private readonly ReceiverApiClient _api;
+    private readonly ILogger<LocalizationService> _logger;
+    private Dictionary<string, string> _strings = new();
+    private Task? _loadTask;
+    private readonly object _gate = new();
+
+    public LocalizationService(ReceiverApiClient api, ILogger<LocalizationService> logger)
+    {
+        _api = api;
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// Languages exposed in the footer's language switcher. Kept as a
+    /// small in-memory list so the receiver UI does not need an extra
+    /// API roundtrip just to populate a dropdown. Mirrors the cultures
+    /// configured server-side (de-DE, en-US, tr-TR).
+    /// </summary>
+    public static readonly IReadOnlyList<(string Code, string Native, string Flag)> SupportedLanguages =
+        new[]
+        {
+            ("de", "Deutsch",  "fi-de"),
+            ("en", "English",  "fi-gb"),
+            ("tr", "Türkçe",   "fi-tr"),
+        };
+
+    /// <summary>Currently active language code (best effort, set after a switch).</summary>
+    public string? CurrentLanguage { get; private set; }
+
+    /// <summary>Fires whenever the language changes and strings are reloaded.</summary>
+    public event Action? Changed;
+
+    /// <summary>
+    /// Get a localized string by key. Returns the key itself if not found
+    /// (compatible with the legacy <c>_localizer["..."].Value</c> behavior).
+    /// </summary>
+    public string this[string key]
+    {
+        get => _strings.TryGetValue(key, out var v) ? v : key;
+    }
+
+    /// <summary>
+    /// Format a localized template with positional arguments (e.g. "{0}", "{1}").
+    /// </summary>
+    public string Format(string key, params object?[] args)
+    {
+        var template = this[key];
+        try
+        {
+            return string.Format(template, args);
+        }
+        catch (FormatException)
+        {
+            return template;
+        }
+    }
+
+    public IReadOnlyDictionary<string, string> All => _strings;
+
+    /// <summary>
+    /// Loads localization strings from the API. Safe to call multiple times;
+    /// concurrent callers share the same in-flight request.
+    /// </summary>
+    public Task EnsureLoadedAsync(CancellationToken ct = default)
+    {
+        lock (_gate)
+        {
+            return _loadTask ??= LoadCoreAsync(ct);
+        }
+    }
+
+    /// <summary>Forces a reload (e.g. after a language change).</summary>
+    public Task ReloadAsync(CancellationToken ct = default)
+    {
+        lock (_gate)
+        {
+            _loadTask = LoadCoreAsync(ct);
+            return _loadTask;
+        }
+    }
+
+    private async Task LoadCoreAsync(CancellationToken ct)
+    {
+        // Refresh the current language alongside the strings so the
+        // footer dropdown reflects the cookie value picked up by the API.
+        var langTask = _api.GetLanguageAsync(ct);
+        var dict = await _api.GetLocalizationStringsAsync(ct);
+        if (dict is not null)
+            _strings = new Dictionary<string, string>(dict, StringComparer.OrdinalIgnoreCase);
+        else
+            _logger.LogWarning("Localization strings could not be loaded; falling back to keys.");
+        CurrentLanguage = await langTask ?? CurrentLanguage;
+        Changed?.Invoke();
+    }
+
+    public async Task ChangeLanguageAsync(string language, CancellationToken ct = default)
+    {
+        await _api.SetLanguageAsync(language, ct);
+        CurrentLanguage = language;
+        await ReloadAsync(ct);
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Services/ReceiverAuthState.cs

@@ -0,0 +1,34 @@
+using EnvelopeGenerator.ReceiverUI.Web.Client.Api.Models;
+
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Services;
+
+/// <summary>
+/// Holds the current receiver authentication context for the active envelope.
+/// Scoped per circuit (Interactive Server) or per browser tab (Interactive WASM).
+///
+/// Pages observe <see cref="Changed"/> to re-render when the underlying
+/// auth response transitions (e.g. requires_access_code -> requires_tfa
+/// -> show_document).
+/// </summary>
+public class ReceiverAuthState
+{
+    private ReceiverAuthResponse? _current;
+    public string? EnvelopeKey { get; private set; }
+    public ReceiverAuthResponse? Current => _current;
+
+    public event Action? Changed;
+
+    public void Set(string envelopeKey, ReceiverAuthResponse? response)
+    {
+        EnvelopeKey = envelopeKey;
+        _current = response;
+        Changed?.Invoke();
+    }
+
+    public void Clear()
+    {
+        EnvelopeKey = null;
+        _current = null;
+        Changed?.Invoke();
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Services/ServiceExtensions.cs

@@ -0,0 +1,25 @@
+using Azure;
+using Azure.AI.OpenAI;
+using Microsoft.Extensions.AI;
+
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Utils
+{
+    public static class ServiceExtensions
+    {
+        // Demo AI services are rate limited and intended for demonstration purposes only.
+        // DevExpress does not offer a REST API and does not ship any built-in LLMs/SLMs.
+        // Use of demo credentials in production is strictly prohibited.
+        // Specify the Azure OpenAI endpoint, key, and deployment name in the 'appsettings.json' file.
+        public static void AddChatClient(this IServiceCollection services, string aiEndpoint, string aiKey, string deployment)
+        {
+            services.AddDevExpressAI();
+            services.AddScoped<IChatClient>(_ =>
+            {
+                var azureClient = new AzureOpenAIClient(new Uri(aiEndpoint), new AzureKeyCredential(aiKey));
+                return azureClient
+                    .GetChatClient(deployment)
+                    .AsIChatClient();
+            });
+        }
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/Shared/DrawerStateComponentBase.cs

@@ -0,0 +1,77 @@
+using Microsoft.AspNetCore.Components;
+
+namespace EnvelopeGenerator.ReceiverUI.Web.Client.Shared
+{
+    public abstract class DrawerStateComponentBase : ComponentBase
+    {
+        [SupplyParameterFromQuery(Name = DrawerStateUrlBuilder.DrawerStateQueryParameterName)]
+        public bool ToggledDrawer { get; set; }
+
+        [Inject] NavigationManager NavigationManager { get; set; } = null!;
+
+        protected string AddDrawerStateToUrl(string baseUrl)
+        {
+            return DrawerStateUrlBuilder.AddStateToUrl(baseUrl, ToggledDrawer, NavigationManager);
+        }
+
+        protected string AddDrawerStateToUrlToggled(string baseUrl)
+        {
+            return DrawerStateUrlBuilder.AddStateToUrl(baseUrl, !ToggledDrawer, NavigationManager);
+        }
+
+        protected string RemoveDrawerStateFromUrl(string baseUrl)
+        {
+            return DrawerStateUrlBuilder.RemoveStateFromUrl(baseUrl, NavigationManager);
+        }
+    }
+
+    public abstract class DrawerStateLayoutComponentBase : LayoutComponentBase
+    {
+        [SupplyParameterFromQuery(Name = DrawerStateUrlBuilder.DrawerStateQueryParameterName)]
+        public bool ToggledDrawer { get; set; }
+
+        [Inject] NavigationManager NavigationManager { get; set; } = null!;
+
+        protected string AddDrawerStateToUrl(string baseUrl)
+        {
+            return DrawerStateUrlBuilder.AddStateToUrl(baseUrl, ToggledDrawer, NavigationManager);
+        }
+
+        protected string AddDrawerStateToUrlToggled(string baseUrl)
+        {
+            return DrawerStateUrlBuilder.AddStateToUrl(baseUrl, !ToggledDrawer, NavigationManager);
+        }
+
+        protected string RemoveDrawerStateFromUrl(string baseUrl)
+        {
+            return DrawerStateUrlBuilder.RemoveStateFromUrl(baseUrl, NavigationManager);
+        }
+    }
+
+    internal static class DrawerStateUrlBuilder
+    {
+        public const string DrawerStateQueryParameterName = "toggledSidebar";
+
+        public static string AddStateToUrl(string baseUrl, bool toggledDrawer, NavigationManager navigationManager)
+        {
+            return navigationManager.GetUriWithQueryParameters(
+                baseUrl,
+                new Dictionary<string, object?>
+                {
+                    [DrawerStateQueryParameterName] = toggledDrawer ? true : null
+                }
+            );
+        }
+
+        public static string RemoveStateFromUrl(string baseUrl, NavigationManager navigationManager)
+        {
+            return navigationManager.GetUriWithQueryParameters(
+                baseUrl,
+                new Dictionary<string, object?>
+                {
+                    [DrawerStateQueryParameterName] = null
+                }
+            );
+        }
+    }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/_Imports.razor

@@ -0,0 +1,19 @@
+@using System.Net.Http
+@using System.Net.Http.Json
+@using Microsoft.AspNetCore.Components.Forms
+@using Microsoft.AspNetCore.Components.Routing
+@using Microsoft.AspNetCore.Components.Web
+@using Microsoft.AspNetCore.Components.Web.Virtualization
+@using Microsoft.JSInterop
+@using static Microsoft.AspNetCore.Components.Web.RenderMode
+@using EnvelopeGenerator.ReceiverUI.Web.Client
+@using EnvelopeGenerator.ReceiverUI.Web.Client.Shared
+@using EnvelopeGenerator.ReceiverUI.Web.Client.Api
+@using EnvelopeGenerator.ReceiverUI.Web.Client.Api.Models
+@using EnvelopeGenerator.ReceiverUI.Web.Client.Services
+
+@using DevExpress.Blazor
+@using DevExpress.Blazor.PdfViewer
+@using DevExpress.Blazor.Reporting.Models
+@using DevExpress.AIIntegration.Blazor.Chat
+@using DevExpress.AIIntegration.Blazor.HtmlEditor

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/wwwroot/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.Client/wwwroot/appsettings.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.sln

@@ -0,0 +1,50 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.0.0
+MinimumVisualStudioVersion = 16.0.0.0
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EnvelopeGenerator.ReceiverUI.Web", "EnvelopeGenerator.ReceiverUI.Web\EnvelopeGenerator.ReceiverUI.Web.csproj", "{650B3CE7-2E93-4CC4-9F46-466686815EAA}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "EnvelopeGenerator.ReceiverUI.Web.Client", "EnvelopeGenerator.ReceiverUI.Web.Client\EnvelopeGenerator.ReceiverUI.Web.Client.csproj", "{5990939C-7E7B-4CFA-86FF-44CA5756498A}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x64.Build.0 = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Debug|x86.Build.0 = Debug|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x64.ActiveCfg = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x64.Build.0 = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x86.ActiveCfg = Release|Any CPU
+		{5990939C-7E7B-4CFA-86FF-44CA5756498A}.Release|x86.Build.0 = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x64.Build.0 = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Debug|x86.Build.0 = Debug|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x64.ActiveCfg = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x64.Build.0 = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x86.ActiveCfg = Release|Any CPU
+		{650B3CE7-2E93-4CC4-9F46-466686815EAA}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4C26868E-5E7C-458D-82E3-040509D0C71F}
+	EndGlobalSection
+EndGlobal

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Components/App.razor

@@ -0,0 +1,37 @@
+@using Microsoft.AspNetCore.Mvc.ViewFeatures
+@inject IFileVersionProvider FileVersionProvider
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <base href="/" />
+    @DxResourceManager.RegisterTheme(ActiveTheme)
+    @DxResourceManager.RegisterScripts()
+    <link href=@AppendVersion("_content/DevExpress.Blazor.Viewer/css/dx-blazor-viewer-components.fluent.css") rel="stylesheet" />
+    <link href=@AppendVersion("css/site.css") rel="stylesheet" />
+    <link href=@AppendVersion("css/receiver-site.css") rel="stylesheet" />
+    <link href=@AppendVersion("css/card.css") rel="stylesheet" />
+    <link href=@AppendVersion("css/logo.css") rel="stylesheet" />
+    <link href=@AppendVersion("css/receiver-extras.css") rel="stylesheet" />
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css" rel="stylesheet" />
+    <link href=@AppendVersion("EnvelopeGenerator.ReceiverUI.Web.styles.css") rel="stylesheet" />
+    <HeadOutlet @rendermode="InteractiveAuto" />
+</head>
+<body>
+    <Routes @rendermode="InteractiveAuto" />
+    <script src="_framework/blazor.web.js"></script>
+    <script src="js/signature-pad.js"></script>
+</body>
+</html>
+
+@code {
+    static readonly ITheme ActiveTheme = Themes.Fluent.Clone(properties => {
+        properties.Mode = ThemeMode.Light;
+        properties.UseBootstrapStyles = true;
+    });
+
+    private string AppendVersion(string path) => FileVersionProvider.AddFileVersionToPath("/", path);
+
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Components/Pages/Error.razor

@@ -0,0 +1,36 @@
+@page "/Error"
+@using System.Diagnostics
+
+<PageTitle>Error</PageTitle>
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>
+
+@code{
+    [CascadingParameter]
+    private HttpContext? HttpContext { get; set; }
+
+    private string? RequestId { get; set; }
+    private bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+    protected override void OnInitialized() =>
+        RequestId = Activity.Current?.Id ?? HttpContext?.TraceIdentifier;
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Components/_Imports.razor

@@ -0,0 +1,18 @@
+@using System.Net.Http
+@using System.Net.Http.Json
+@using Microsoft.AspNetCore.Components.Forms
+@using Microsoft.AspNetCore.Components.Routing
+@using Microsoft.AspNetCore.Components.Web
+@using Microsoft.AspNetCore.Components.Web.Virtualization
+@using Microsoft.JSInterop
+@using static Microsoft.AspNetCore.Components.Web.RenderMode
+@using EnvelopeGenerator.ReceiverUI.Web
+@using EnvelopeGenerator.ReceiverUI.Web.Components
+@using EnvelopeGenerator.ReceiverUI.Web.Client
+@using EnvelopeGenerator.ReceiverUI.Web.Client.Shared
+
+@using DevExpress.Blazor
+@using DevExpress.Blazor.PdfViewer
+@using DevExpress.Blazor.Reporting.Models
+@using DevExpress.AIIntegration.Blazor.Chat
+@using DevExpress.AIIntegration.Blazor.HtmlEditor

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.csproj

@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DevExpress.Blazor" Version="25.2.*" />
+    <PackageReference Include="DevExpress.Blazor.PdfViewer" Version="25.2.*" />
+    <PackageReference Include="DevExpress.Pdf.SkiaRenderer" Version="25.2.*" />
+    <PackageReference Include="SkiaSharp.NativeAssets.WebAssembly" Version="3.119.1" />
+    <PackageReference Include="HarfBuzzSharp.NativeAssets.WebAssembly" Version="8.3.1.2" />
+    <PackageReference Include="DevExpress.AIIntegration.Blazor" Version="25.2.*" />
+    <PackageReference Include="DevExpress.AIIntegration.OpenAI" Version="25.2.*" />
+    
+    <PackageReference Include="Azure.AI.OpenAI" Version="2.2.0-beta.5" />
+    <PackageReference Include="Microsoft.Extensions.AI" Version="9.7.1" />
+    <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.7.1-preview.1.25365.4" />
+    
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="8.0.20" />
+    <PackageReference Include="Yarp.ReverseProxy" Version="2.2.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\EnvelopeGenerator.ReceiverUI.Web.Client\EnvelopeGenerator.ReceiverUI.Web.Client.csproj" />
+  </ItemGroup>
+</Project>

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Program.cs

@@ -0,0 +1,106 @@
+using EnvelopeGenerator.ReceiverUI.Web.Client.Api;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Services;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Utils;
+using EnvelopeGenerator.ReceiverUI.Web.Components;
+using System.Text;
+
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddRazorComponents()
+    .AddInteractiveServerComponents()
+    .AddInteractiveWebAssemblyComponents();
+
+builder.Services.AddDevExpressBlazor(options =>
+{
+    options.SizeMode = DevExpress.Blazor.SizeMode.Medium;
+});
+
+var aiUri = builder.Configuration.GetSection("AzureOpenAISettings")["Endpoint"];
+var aiKey = builder.Configuration.GetSection("AzureOpenAISettings")["Key"];
+var aiModel = builder.Configuration.GetSection("AzureOpenAISettings")["DeploymentName"];
+
+if (string.IsNullOrEmpty(aiUri) || string.IsNullOrEmpty(aiKey) || string.IsNullOrEmpty(aiModel))
+    throw new InvalidOperationException("Specify the OpenAI endpoint, key, and deployment name in the 'appsettings.json' file.");
+builder.Services.AddChatClient(aiUri, aiKey, aiModel);
+builder.Services.AddHttpClient();
+
+builder.Services.AddMvc();
+
+builder.Services.AddDevExpressServerSideBlazorPdfViewer();
+
+// ── Receiver API + Auth + Localization (for prerender on the server) ─
+// During prerendering the components still need the same scoped services
+// as on the WASM side. Server-side calls go directly to the API
+// (configured via "Api:BaseUrl"); browser-side calls go through YARP.
+// Note: server-side prerender does NOT forward the user's auth cookie yet
+// (will be added in a later phase if interactive prerender is needed).
+var apiBaseUrl = builder.Configuration["Api:BaseUrl"]
+    ?? throw new InvalidOperationException("Api:BaseUrl is missing from configuration.");
+builder.Services.AddHttpClient<ReceiverApiClient>(client =>
+{
+    client.BaseAddress = new Uri(apiBaseUrl.TrimEnd('/') + "/");
+});
+builder.Services.AddScoped<LocalizationService>();
+builder.Services.AddScoped<ReceiverAuthState>();
+
+// ── YARP reverse proxy: forwards /api/** from the browser to the API
+// (same-origin from the browser's POV → HttpOnly auth cookie flows).
+builder.Services.AddReverseProxy()
+    .LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseWebAssemblyDebugging();
+}
+else
+{
+    app.UseExceptionHandler("/Error", createScopeForErrors: true);
+    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
+    app.UseHsts();
+}
+
+app.MapPost("/api/chat/{*path}", async (string path, HttpContext context, CancellationToken ct) =>
+{
+    var httpClientFactory = context.RequestServices.GetRequiredService<IHttpClientFactory>();
+
+    var client = httpClientFactory.CreateClient();
+    client.BaseAddress = new(aiUri);
+    client.DefaultRequestHeaders.Authorization = new("Bearer", aiKey);
+
+    var newPath = path.Replace("proxychat", aiModel);
+    var endpointUri = new Uri(aiUri);
+    var uriBuilder = new UriBuilder(endpointUri)
+    {
+        Path = $"{endpointUri.AbsolutePath}/{newPath}",
+        Query = context.Request.QueryString.Value
+    };
+
+    var body = await new StreamReader(context.Request.Body).ReadToEndAsync(ct);
+
+    var response = await client.PostAsync(uriBuilder.Uri, new StringContent(body, Encoding.UTF8, "application/json"), ct);
+    context.Response.StatusCode = (int)response.StatusCode;
+    await response.Content.CopyToAsync(context.Response.Body, ct);
+});
+
+app.UseHttpsRedirection();
+
+app.UseStaticFiles();
+app.UseAntiforgery();
+
+// Forward all /api/** traffic (except /api/chat which is handled above)
+// to the EnvelopeGenerator.API backend.
+app.MapReverseProxy();
+
+app.MapRazorComponents<App>()
+    .AddInteractiveServerRenderMode()
+    .AddInteractiveWebAssemblyRenderMode()
+    .AddAdditionalAssemblies(typeof(EnvelopeGenerator.ReceiverUI.Web.Client._Imports).Assembly)
+    .AllowAnonymous();
+
+app.Run();
+

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Properties/launchSettings.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
+      "applicationUrl": "http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
+      "applicationUrl": "https://localhost:5001;http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}