refaactor: move css files to WebUI

Enhanced `appsettings.json` with `ApiOptions` and `PdfViewerOptions` for better customization of rendering and zoom behaviors.

Added comprehensive styles in `envelope-viewer.css` for the layout, toolbar, thumbnails, and responsive design of the envelope viewer.

Introduced `receiver-signature.js` to manage signature functionality, including drawing, typed, and image-based signatures, as well as dynamic annotation checkboxes.

Integrated `Typed.js` (UMD version) for typing animations with configurable speeds, looping, and event hooks.

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Data/Adjustment.cs

@@ -0,0 +1,44 @@
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Data/Customer.cs

@@ -0,0 +1,64 @@
+using DevExpress.DataAccess.Sql;
+using DevExpress.DataAccess.Sql.DataApi;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Data/DataItem.cs

@@ -0,0 +1,71 @@
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Data/DataItemList.cs

@@ -0,0 +1,70 @@
+using System.Collections;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Data/DeterministicRandom.cs

@@ -0,0 +1,60 @@
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Data/Term.cs

@@ -0,0 +1,15 @@
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/EnvelopeGenerator.WebUI.Client.csproj

@@ -0,0 +1,36 @@
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <NoDefaultLaunchSettingsFile>true</NoDefaultLaunchSettingsFile>
+    <StaticWebAssetProjectMode>Default</StaticWebAssetProjectMode>
+    <WasmBuildNative>true</WasmBuildNative>
+    <InvariantGlobalization>false</InvariantGlobalization>
+    <BlazorWebAssemblyLoadAllGlobalizationData>true</BlazorWebAssemblyLoadAllGlobalizationData>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DevExpress.Blazor.PdfViewer" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Blazor.Reporting.JSBasedControls" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Blazor.Reporting.Viewer" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Drawing.Skia" Version="25.2.3" />
+    <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="8.0.22" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.11" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Update="PredefinedReports\Report.cs">
+      <SubType>XtraReport</SubType>
+    </Compile>
+  </ItemGroup>
+
+</Project>

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Layout/MainLayout.razor

@@ -0,0 +1,9 @@
+@inherits LayoutComponentBase
+
+@Body
+
+<div id="blazor-error-ui">
+    An unhandled error has occurred.
+    <a href="" class="reload">Reload</a>
+    <a class="dismiss">🗙</a>
+</div>

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Layout/MainLayout.razor.css

@@ -0,0 +1,18 @@
+#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;
+    }

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Models/AnnotationDto.cs

@@ -0,0 +1,32 @@
+namespace EnvelopeGenerator.WebUI.Client.Models;
+
+/// <summary>
+/// Represents a pre-assigned signature annotation position on a specific page.
+/// <br/><br/>
+/// <b>Coordinate unit (X, Y):</b> Inches (GdPicture14 native unit),
+/// origin at the <b>top-left</b> corner of the page, both axes increase downward/rightward.
+/// <br/><br/>
+/// <b>Conversion to DevExpress:</b> Multiply by 100 (DX uses 1/100 inch).
+/// Convert: <c>xDX = xInches * 100.0</c>
+/// <br/>
+/// <b>Conversion to PDF Points:</b> Multiply by 72 (1 inch = 72 points).
+/// Convert: <c>xPt = xInches * 72.0</c>
+/// <br/>
+/// <b>Y-axis for PDF (bottom-left origin):</b> Flip required for iText7.
+/// Convert: <c>yPt = (pageHeightInches - yInches - elemHeightInches) * 72.0</c>
+/// </summary>
+[Obsolete("Use SignatureDto with SignatureService.")]
+public record AnnotationDto
+{
+    /// <summary>Unique identifier of the annotation.</summary>
+    public long Id { get; init; }
+
+    /// <summary>1-based page number within the document.</summary>
+    public int Page { get; init; }
+
+    /// <summary>Horizontal position in INCHES from the left edge of the page.</summary>
+    public double X { get; init; }
+
+    /// <summary>Vertical position in INCHES from the top edge of the page.</summary>
+    public double Y { get; init; }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Models/Constants/SenderAppType.cs

@@ -0,0 +1,8 @@
+namespace EnvelopeGenerator.WebUI.Client.Models.Constants
+{
+    public enum SenderAppType
+    {
+        LegacyFormApp = 0,
+        ReceiverUIBlazorApp = 1
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Models/Constants/UnitOfLength.cs

@@ -0,0 +1,65 @@
+namespace EnvelopeGenerator.WebUI.Client.Models.Constants;
+
+/// <summary>
+/// Represents the unit of measurement for coordinate values in signature positioning.
+/// Used for converting coordinates between different systems (GdPicture14, PDF.js, iText7).
+/// </summary>
+public enum UnitOfLength
+{
+    /// <summary>
+    /// Inch unit (1 inch = 25.4 mm).
+    /// This is the native unit used by GdPicture14 (EnvelopeGenerator.Form - Legacy VB.NET app).
+    /// Database stores all coordinates (X, Y, Width, Height) in INCHES.
+    /// </summary>
+    /// <remarks>
+    /// <b>Source:</b> GdPicture14.Annotations.AnnotationStickyNote uses INCHES natively.
+    /// <br/>
+    /// <b>Evidence:</b> VB.NET code directly assigns database values to annotation properties without conversion:
+    /// <code>
+    /// oAnnotation.Left = CSng(pElement.X)   ' Direct assignment ? INCHES
+    /// oAnnotation.Top = CSng(pElement.Y)
+    /// </code>
+    /// <b>Standard Page Dimensions:</b>
+    /// <list type="bullet">
+    ///   <item>A4: 8.27" × 11.69" (210mm × 297mm)</item>
+    ///   <item>Letter: 8.5" × 11"</item>
+    /// </list>
+    /// </remarks>
+    Inch = 0,
+
+    /// <summary>
+    /// PDF Point unit (1 point = 1/72 inch).
+    /// This is the standard unit used by PDF specification and PDF.js viewer.
+    /// </summary>
+    /// <remarks>
+    /// <b>Definition:</b> According to PDF specification and Microsoft documentation:
+    /// <br/>
+    /// <i>"PDF pages are sized in point units. 1 pt == 1/72 inch"</i>
+    /// <br/><br/>
+    /// <b>Conversion Formula:</b>
+    /// <code>
+    /// points = inches * 72.0
+    /// inches = points / 72.0
+    /// </code>
+    /// <b>Important:</b> Point ? Pixel!
+    /// <list type="bullet">
+    ///   <item><b>Point (pt):</b> Device-independent unit (always 1/72 inch)</item>
+    ///   <item><b>Pixel (px):</b> Device-dependent unit (varies with screen DPI)</item>
+    ///   <item>At 72 DPI: 1 point = 1 pixel (coincidence)</item>
+    ///   <item>At 96 DPI: 1 point ? 1.33 pixels</item>
+    ///   <item>At 300 DPI: 1 point ? 4.17 pixels</item>
+    /// </list>
+    /// <b>Standard Page Dimensions (in points):</b>
+    /// <list type="bullet">
+    ///   <item>A4: 595 × 842 points (8.27" × 11.69" × 72)</item>
+    ///   <item>Letter: 612 × 792 points (8.5" × 11" × 72)</item>
+    /// </list>
+    /// <b>Usage in EnvelopeGenerator:</b>
+    /// <list type="bullet">
+    ///   <item>PDF.js viewer expects coordinates in points</item>
+    ///   <item>iText7 library uses points for PDF manipulation</item>
+    ///   <item>PSPDFKit (Web) uses points for annotation placement</item>
+    /// </list>
+    /// </remarks>
+    Point
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Models/EnvelopeReceiverDto.cs

@@ -0,0 +1,105 @@
+namespace EnvelopeGenerator.WebUI.Client.Models;
+
+/// <summary>
+/// Client-side model for the envelope receiver returned by
+/// <c>GET api/EnvelopeReceiver/{envelopeKey}</c>.
+/// </summary>
+public record EnvelopeReceiverDto
+{
+    public int EnvelopeId { get; init; }
+    public int ReceiverId { get; init; }
+    public int Sequence { get; init; }
+
+    public string? Name { get; init; }
+    public string? JobTitle { get; init; }
+    public string? CompanyName { get; init; }
+    public string? PrivateMessage { get; init; }
+
+    public DateTime AddedWhen { get; init; }
+    public DateTime? ChangedWhen { get; init; }
+    public bool HasPhoneNumber { get; init; }
+
+    public EnvelopeClientDto? Envelope { get; init; }
+    public ReceiverClientDto? Receiver { get; init; }
+}
+
+/// <summary>
+/// Client-side model for the envelope data embedded in <see cref="EnvelopeReceiverDto"/>.
+/// </summary>
+public record EnvelopeClientDto
+{
+    public int Id { get; init; }
+    public int UserId { get; init; }
+    public int Status { get; init; }
+    public string StatusName { get; init; } = string.Empty;
+    public string Uuid { get; init; } = string.Empty;
+    public string Title { get; init; } = string.Empty;
+    public string Message { get; init; } = string.Empty;
+    public DateTime AddedWhen { get; init; }
+    public DateTime? ChangedWhen { get; init; }
+    public string Language { get; init; } = "de-DE";
+    public int? EnvelopeTypeId { get; init; }
+    public string? EnvelopeTypeTitle { get; init; }
+    public int? ContractType { get; init; }
+    public int? CertificationType { get; init; }
+    public bool UseAccessCode { get; init; }
+    public bool TFAEnabled { get; init; }
+    public IEnumerable<DocumentClientDto>? Documents { get; init; }
+    public EnvelopeSenderDto? User { get; init; }
+}
+
+/// <summary>
+/// Sender (user) information embedded in <see cref="EnvelopeClientDto"/>.
+/// </summary>
+public record EnvelopeSenderDto
+{
+    public int Id { get; init; }
+    public string? Username { get; init; }
+    public string? FullName { get; init; }
+    public string? Email { get; init; }
+}
+
+/// <summary>
+/// Client-side model for a document embedded in <see cref="EnvelopeClientDto"/>.
+/// </summary>
+public record DocumentClientDto
+{
+    public int Id { get; init; }
+    public int EnvelopeId { get; init; }
+    public DateTime AddedWhen { get; init; }
+    public IEnumerable<SignatureClientDto>? Elements { get; init; }
+}
+
+/// <summary>
+/// Client-side model for a signature/annotation element embedded in <see cref="DocumentClientDto"/>.
+/// </summary>
+public record SignatureClientDto
+{
+    public int Id { get; init; }
+    public int DocumentId { get; init; }
+    public int ReceiverId { get; init; }
+    public int ElementType { get; init; }
+    public double X { get; init; }
+    public double Y { get; init; }
+    public double Width { get; init; }
+    public double Height { get; init; }
+    public int Page { get; init; }
+    public bool Required { get; init; }
+    public string? Tooltip { get; init; }
+    public bool ReadOnly { get; init; }
+    public int AnnotationIndex { get; init; }
+    public DateTime AddedWhen { get; init; }
+    public DateTime? ChangedWhen { get; init; }
+}
+
+/// <summary>
+/// Client-side model for the receiver data embedded in <see cref="EnvelopeReceiverDto"/>.
+/// </summary>
+public record ReceiverClientDto
+{
+    public int Id { get; init; }
+    public string? EmailAddress { get; init; }
+    public string? Signature { get; init; }
+    public DateTime AddedWhen { get; init; }
+    public DateTime? TfaRegDeadline { get; init; }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Models/SignatureCaptureDto.cs

@@ -0,0 +1,61 @@
+namespace EnvelopeGenerator.WebUI.Client.Models;
+
+/// <summary>
+/// Represents a captured signature with metadata created by the receiver in the signature popup.
+/// This model holds the signature image (as base64 data URL) along with signer information
+/// used for rendering applied signatures on the PDF canvas.
+/// </summary>
+/// <remarks>
+/// <b>Used in:</b> EnvelopeViewer.razor signature popup workflow
+/// <br/>
+/// <b>Creation:</b> User draws/types/uploads signature and fills required fields
+/// <br/>
+/// <b>Storage:</b> Session-only (Blazor component state, lost on page refresh)
+/// <br/>
+/// <b>Rendering:</b> Applied signatures display: Image + Separator + Name/Position/Place/Date
+/// </remarks>
+public sealed record SignatureCaptureDto
+{
+    /// <summary>
+    /// Base64-encoded data URL of the signature image.
+    /// <br/>
+    /// <b>Format:</b> <c>data:image/png;base64,iVBORw0KG...</c>
+    /// <br/>
+    /// <b>Source:</b> Canvas.toDataURL() from signature pad (draw/text/image tabs)
+    /// <br/>
+    /// <b>Usage:</b> Set as <c>img.src</c> in applied signature overlay
+    /// </summary>
+    public required string DataUrl { get; init; }
+
+    /// <summary>
+    /// Full name of the signer (first and last name).
+    /// <br/>
+    /// <b>Required:</b> Yes (validated in popup)
+    /// <b>Display:</b> Bold text in applied signature block
+    /// <br/>
+    /// <b>Example:</b> "Max Mustermann"
+    /// </summary>
+    public required string FullName { get; init; }
+
+    /// <summary>
+    /// Job title or position of the signer.
+    /// <br/>
+    /// <b>Required:</b> No (optional field)
+    /// <br/>
+    /// <b>Display:</b> Normal weight text between name and place/date
+    /// <br/>
+    /// <b>Example:</b> "Geschäftsführer" or empty string
+    /// </summary>
+    public string Position { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Location/place where the signature was created.
+    /// <br/>
+    /// <b>Required:</b> Yes (validated in popup)
+    /// <br/>
+    /// <b>Display:</b> Shown with current date in German format (dd.MM.yyyy)
+    /// <br/>
+    /// <b>Example:</b> "Berlin" ? rendered as "Berlin, 26.01.2025"
+    /// </summary>
+    public required string Place { get; init; }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Models/SignatureDto.cs

@@ -0,0 +1,101 @@
+using EnvelopeGenerator.WebUI.Client.Models.Constants;
+
+namespace EnvelopeGenerator.WebUI.Client.Models;
+
+/// <summary>
+/// Represents a signature position on a PDF page.
+/// Coordinates stored in INCHES (GdPicture14 native unit).
+/// Origin: Top-left corner, X increases right, Y increases down.
+/// </summary>
+public class SignatureDto
+{
+    /// <summary>Unique identifier.</summary>
+    public int Id { get; init; }
+
+    private double _x;
+    private double _y;
+
+    /// <summary>Horizontal position in INCHES from left edge.</summary>
+    public double X 
+    { 
+        get => _x * Factor;
+        init => _x = value; 
+    }
+
+    /// <summary>Vertical position in INCHES from top edge.</summary>
+    public double Y 
+    { 
+        get => _y * Factor;
+        init => _y = value; 
+    }
+
+    /// <summary>1-based page number.</summary>
+    public int Page { get; init; }
+
+    /// <summary>Sender application type that created this signature.</summary>
+    public SenderAppType SenderAppType { get; init; }
+
+    private UnitOfLength _unitOfLength;
+
+    public SignatureDto Convert(UnitOfLength unitOfLength)
+    {
+        _unitOfLength = unitOfLength;
+        return this;
+    }
+
+    public double Factor
+    {
+        get
+        {
+            if (SenderAppType != SenderAppType.LegacyFormApp)
+            {
+                throw new NotImplementedException(
+                    $"SenderAppType '{SenderAppType}' is not yet implemented. " +
+                    $"Currently, only '{nameof(SenderAppType.LegacyFormApp)}' is supported. " +
+                    $"Future implementations will handle '{nameof(SenderAppType.ReceiverUIBlazorApp)}' and other types.");
+            }
+
+            // LegacyFormApp uses GdPicture14 with INCHES
+            return _unitOfLength switch
+            {
+                UnitOfLength.Inch => 1.0,   // No conversion needed: INCHES ? INCHES
+                UnitOfLength.Point => 72.0, // INCHES ? PDF Points: 1 inch = 72 points (PDF standard, NOT pixels!)
+                _ => throw new InvalidOperationException(
+                    $"Unknown UnitOfLength: {_unitOfLength}. Expected '{nameof(UnitOfLength.Inch)}' or '{nameof(UnitOfLength.Point)}'.")
+            };
+        }
+    }
+}
+
+public static class SignatureDtoExtensions
+{
+    /// <summary>
+    /// Converts all signatures in the collection to the specified unit of length.
+    /// </summary>
+    /// <typeparam name="T">Type of the collection (IEnumerable, List, etc.)</typeparam>
+    /// <param name="signatures">Collection of SignatureDto objects to convert.</param>
+    /// <param name="unitOfLength">Target unit of measurement (Inch or Point).</param>
+    /// <returns>The same collection with all signatures converted to the specified unit.</returns>
+    /// <exception cref="ArgumentNullException">Thrown when signatures collection is null.</exception>
+    /// <remarks>
+    /// <b>Usage:</b>
+    /// <code>
+    /// var signatures = await SignatureService.GetAsync(envelopeKey);
+    /// var convertedSignatures = signatures.ConvertAll(UnitOfLength.Point);
+    /// </code>
+    /// <b>Note:</b> This method modifies each SignatureDto object in place and returns the same collection.
+    /// </remarks>
+    public static T Convert<T>(this T signatures, UnitOfLength unitOfLength) 
+        where T : IEnumerable<SignatureDto>
+    {
+        if (signatures == null)
+            throw new ArgumentNullException(nameof(signatures));
+
+        foreach (var signature in signatures)
+        {
+            signature.Convert(unitOfLength);
+        }
+
+        return signatures;
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Options/ApiOptions.cs

@@ -0,0 +1,10 @@
+namespace EnvelopeGenerator.WebUI.Client.Options;
+
+public class ApiOptions
+{
+    public const string SectionName = "ApiOptions";
+
+    public string BaseUrl { get; set; } = string.Empty;
+
+    public bool UsePredefinedReports { get; set; } = false;
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Options/PdfViewerOptions.cs

@@ -0,0 +1,71 @@
+namespace EnvelopeGenerator.WebUI.Client.Options;
+
+public class PdfViewerOptions
+{
+    public const string SectionName = "PdfViewerOptions";
+
+    /// <summary>
+    /// Base scale for thumbnail rendering (0.2 - 1.5 recommended)
+    /// Higher values = better quality but slower rendering
+    /// Default: 0.75
+    /// </summary>
+    public double ThumbnailBaseScale { get; set; } = 0.75;
+
+    /// <summary>
+    /// Enable HiDPI/Retina support for thumbnails
+    /// Default: true
+    /// </summary>
+    public bool ThumbnailEnableHiDPI { get; set; } = true;
+
+    /// <summary>
+    /// Maximum device pixel ratio multiplier for thumbnails (1.0 - 3.0)
+    /// Caps DPR to avoid excessive memory usage on 4K+ displays
+    /// Default: 2.0
+    /// </summary>
+    public double ThumbnailMaxDPR { get; set; } = 2.0;
+
+    /// <summary>
+    /// Enable HiDPI/Retina support for main PDF canvas
+    /// Default: true
+    /// </summary>
+    public bool MainCanvasEnableHiDPI { get; set; } = true;
+
+    /// <summary>
+    /// Maximum device pixel ratio multiplier for main canvas (1.0 - 3.0)
+    /// Default: 2.0
+    /// </summary>
+    public double MainCanvasMaxDPR { get; set; } = 2.0;
+
+    /// <summary>
+    /// Enable smooth zoom transition (fade effect)
+    /// Default: true
+    /// </summary>
+    public bool EnableSmoothZoom { get; set; } = true;
+
+    /// <summary>
+    /// Zoom transition duration in milliseconds (50 - 500)
+    /// Default: 150
+    /// </summary>
+    public int ZoomTransitionDuration { get; set; } = 150;
+
+    /// <summary>
+    /// Opacity during rendering (0.0 - 1.0)
+    /// Lower values = more visible fade effect
+    /// Default: 0.85
+    /// </summary>
+    public double RenderingOpacity { get; set; } = 0.85;
+
+    /// <summary>
+    /// Delay between thumbnail renders in milliseconds (10 - 200)
+    /// Higher values = less browser stress, slower initial load
+    /// Default: 50
+    /// </summary>
+    public int ThumbnailRenderDelay { get; set; } = 50;
+
+    /// <summary>
+    /// Zoom step percentage (1 - 50)
+    /// Controls how much zoom changes per click or scroll
+    /// Default: 5 (5% per step)
+    /// </summary>
+    public int ZoomStepPercentage { get; set; } = 5;
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Pages/EnvelopeSenderPage.razor

@@ -0,0 +1,8 @@
+@page "/sender"
+@rendermode InteractiveWebAssembly
+
+<h3>EnvelopeSender</h3>
+
+@code {
+
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Pages/Home.razor

@@ -0,0 +1,7 @@
+@page "/"
+
+<PageTitle>Home</PageTitle>
+
+<h1>Hello, world!</h1>
+
+Welcome to your new app.

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Pages/Index.razor

@@ -0,0 +1,72 @@
+@page "/"
+@rendermode InteractiveWebAssembly
+@inject IJSRuntime JS
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<div class="home-page-wrapper">
+
+    <div class="home-hero-header">
+        <div class="home-hero-header__inner">
+            <svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" fill="currentColor" class="home-hero-header__icon" viewBox="0 0 16 16">
+                <path d="M0 4a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V4Zm2-1a1 1 0 0 0-1 1v.217l7 4.2 7-4.2V4a1 1 0 0 0-1-1H2Zm13 2.383-4.708 2.825L15 11.105V5.383Zm-.034 6.876-5.64-3.471L8 9.583l-1.326-.795-5.64 3.47A1 1 0 0 0 2 13h12a1 1 0 0 0 .966-.741ZM1 11.105l4.708-2.897L1 5.383v5.722Z"/>
+            </svg>
+            <div>
+                <h1 class="home-hero-header__title">SignFlow</h1>
+                <p class="home-hero-header__subtitle">Willkommen im eSign-Portal</p>
+            </div>
+        </div>
+    </div>
+
+    <div class="home-content">
+        <div class="home-card card shadow border-0">
+            <div class="card-body p-4 p-md-5">
+
+                <p class="text-muted mb-4" style="font-size: 0.92rem; line-height: 1.7; text-align: justify; text-align-last: left; min-height: calc(0.92rem * 1.7 * 9);">
+                    <span id="home-description"></span>
+                </p>
+
+                <div class="mt-4 pt-3 border-top">
+                    <div class="d-flex flex-wrap justify-content-center gap-3">
+                        <div class="home-feature-badge">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                            </svg>
+                            Sicherer Zugang
+                        </div>
+                        <div class="home-feature-badge">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
+                            </svg>
+                            Digitale Unterschrift
+                        </div>
+                        <div class="home-feature-badge">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M.5 9.9a.5.5 0 0 1 .5.5v2.5a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-2.5a.5.5 0 0 1 1 0v2.5a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-2.5a.5.5 0 0 1 .5-.5z"/>
+                                <path d="M7.646 11.854a.5.5 0 0 0 .708 0l3-3a.5.5 0 0 0-.708-.708L8.5 10.293V1.5a.5.5 0 0 0-1 0v8.793L5.354 8.146a.5.5 0 1 0-.708.708l3 3z"/>
+                            </svg>
+                            PDF-Export
+                        </div>
+                    </div>
+                </div>
+
+            </div>
+        </div>
+    </div>
+
+</div>
+
+@code {
+    private const string HomePageDescription =
+        "Das digitale Unterschriftenportal ist eine Plattform, die entwickelt wurde, um Ihre Dokumente sicher zu unterschreiben und zu verwalten. " +
+        "Mit seiner benutzerfreundlichen Oberfläche können Sie Ihre Dokumente schnell hochladen, die Unterschriftsprozesse verfolgen und Ihre digitalen Unterschriftenanwendungen einfach durchführen. " +
+        "Dieses Portal beschleunigt Ihren Arbeitsablauf mit rechtlich gültigen Unterschriften und erhöht gleichzeitig die Sicherheit Ihrer Dokumente.";
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (firstRender)
+        {
+            await JS.InvokeVoidAsync("receiverSignature.startTyped", "home-description", HomePageDescription, 15);
+        }
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Pages/LoginReceiverPage.razor

@@ -0,0 +1,158 @@
+@page "/envelope/login/{EnvelopeKey}"
+@rendermode InteractiveWebAssembly
+@using EnvelopeGenerator.WebUI.Client.Services
+@inject AuthService AuthService
+@inject NavigationManager Navigation
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<div class="login-page-wrapper d-flex align-items-center justify-content-center min-vh-100">
+    <div class="login-card card shadow border-0" style="max-width: 440px; width: 100%;">
+
+        <div class="card-header text-white text-center py-4 border-0" style="background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); border-radius: calc(0.375rem - 1px) calc(0.375rem - 1px) 0 0;">
+            <div class="mb-2">
+                <svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" fill="currentColor" viewBox="0 0 16 16">
+                    <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                </svg>
+            </div>
+            <h5 class="mb-0 fw-semibold">Dokument öffnen</h5>
+            <p class="mb-0 mt-1 opacity-75" style="font-size: 0.85rem;">Sicherer Zugang mit Zugangscode</p>
+        </div>
+
+        <div class="card-body p-4">
+
+            <p class="text-muted mb-4" style="font-size: 0.875rem; line-height: 1.5;">
+                Bitte geben Sie den Zugangscode ein, den Sie per E-Mail erhalten haben, um das Dokument sicher zu öffnen.
+            </p>
+
+            @if (LoginResult == EnvelopeLoginResult.NotFound) {
+                <div class="alert alert-warning d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M8.982 1.566a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566zM8 5c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995A.905.905 0 0 1 8 5zm.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2z"/>
+                    </svg>
+                    <div>
+                        <strong>Dokument nicht gefunden.</strong><br />
+                        <span style="font-size:0.85rem;">Der angegebene Zugangscode konnte keinem Dokument zugeordnet werden. Bitte prüfen Sie den Link in Ihrer E-Mail.</span>
+                    </div>
+                </div>
+            } else if (LoginResult == EnvelopeLoginResult.InvalidCode) {
+                <div class="alert alert-danger d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z"/>
+                    </svg>
+                    <div>
+                        <strong>Ungültiger Zugangscode.</strong><br />
+                        <span style="font-size:0.85rem;">Der eingegebene Code ist falsch. Bitte versuchen Sie es erneut.</span>
+                    </div>
+                </div>
+            } else if (LoginResult == EnvelopeLoginResult.Error) {
+                <div class="alert alert-secondary d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z"/>
+                        <path d="M7.002 11a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 4.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 4.995z"/>
+                    </svg>
+                    <div>
+                        <strong>Serverfehler.</strong><br />
+                        <span style="font-size:0.85rem;">Ein unerwarteter Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.</span>
+                    </div>
+                </div>
+            }
+
+            <div class="mb-4">
+                <label class="form-label fw-medium" for="login-access-code">
+                    Zugangscode
+                    <span class="text-danger ms-1">*</span>
+                </label>
+                <div class="input-group">
+                    <span class="input-group-text bg-light border-end-0">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="#6c757d" viewBox="0 0 16 16">
+                            <path d="M3.5 11.5a3.5 3.5 0 1 1 3.163-5H14L15.5 8 14 9.5l-1-1-1 1-1-1-1 1-1-1-1.837 1.337A3.5 3.5 0 0 1 3.5 11.5zm0-1a2.5 2.5 0 1 0 0-5 2.5 2.5 0 0 0 0 5z"/>
+                        </svg>
+                    </span>
+                    <input id="login-access-code"
+                           type="@(ShowCode ? "text" : "password")"
+                           class="form-control border-start-0 border-end-0 @(LoginResult == EnvelopeLoginResult.InvalidCode ? "is-invalid" : null)"
+                           placeholder="Zugangscode eingeben"
+                           @bind="AccessCode"
+                           @bind:event="oninput"
+                           @onkeydown="OnKeyDownAsync"
+                           disabled="@IsLoading"
+                           autocomplete="one-time-code" />
+                    <button type="button"
+                            class="btn btn-outline-secondary border-start-0"
+                            style="border-left: none;"
+                            tabindex="-1"
+                            @onclick="() => ShowCode = !ShowCode">
+                        @if (ShowCode) {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewBox="0 0 16 16">
+                                <path d="M13.359 11.238C15.06 9.72 16 8 16 8s-3-5.5-8-5.5a7.028 7.028 0 0 0-2.79.588l.77.771A5.944 5.944 0 0 1 8 3.5c2.12 0 3.879 1.168 5.168 2.457A13.134 13.134 0 0 1 14.828 8c-.058.087-.122.183-.195.288-.335.48-.83 1.12-1.465 1.755-.165.165-.337.328-.517.486l.708.709z"/>
+                                <path d="M11.297 9.176a3.5 3.5 0 0 0-4.474-4.474l.823.823a2.5 2.5 0 0 1 2.829 2.829l.822.822zm-2.943 1.299.822.822a3.5 3.5 0 0 1-4.474-4.474l.823.823a2.5 2.5 0 0 0 2.829 2.829z"/>
+                                <path d="M3.35 5.47c-.18.16-.353.322-.518.487A13.134 13.134 0 0 0 1.172 8l.195.288c.335.48.83 1.12 1.465 1.755C4.121 11.332 5.881 12.5 8 12.5c.716 0 1.39-.133 2.02-.36l.77.772A7.029 7.029 0 0 1 8 13.5C3 13.5 0 8 0 8s.939-1.721 2.641-3.238l.708.709z"/>
+                                <path fill-rule="evenodd" d="M13.646 14.354l-12-12 .708-.708 12 12-.708.708z"/>
+                            </svg>
+                        } else {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewBox="0 0 16 16">
+                                <path d="M16 8s-3-5.5-8-5.5S0 8 0 8s3 5.5 8 5.5S16 8 16 8zM1.173 8a13.133 13.133 0 0 1 1.66-2.043C4.12 4.668 5.88 3.5 8 3.5c2.12 0 3.879 1.168 5.168 2.457A13.133 13.133 0 0 1 14.828 8c-.058.087-.122.183-.195.288-.335.48-.83 1.12-1.465 1.755C11.879 11.332 10.119 12.5 8 12.5c-2.12 0-3.879-1.168-5.168-2.457A13.134 13.134 0 0 1 1.172 8z"/>
+                                <path d="M8 5.5a2.5 2.5 0 1 0 0 5 2.5 2.5 0 0 0 0-5zM4.5 8a3.5 3.5 0 1 1 7 0 3.5 3.5 0 0 1-7 0z"/>
+                            </svg>
+                        }
+                    </button>
+                </div>
+            </div>
+
+            <button class="btn btn-primary w-100 py-2 fw-medium"
+                    style="background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); border: none;"
+                    @onclick="SubmitAsync"
+                    disabled="@(IsLoading || string.IsNullOrWhiteSpace(AccessCode))">
+                @if (IsLoading) {
+                    <span class="spinner-border spinner-border-sm me-2" role="status" aria-hidden="true"></span>
+                    <span>Überprüfen …</span>
+                } else {
+                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="me-2" viewBox="0 0 16 16">
+                        <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                    </svg>
+                    <span>Dokument öffnen</span>
+                }
+            </button>
+
+        </div>
+
+        <div class="card-footer text-center text-muted py-3 border-0 bg-transparent" style="font-size: 0.78rem;">
+            Bei Problemen wenden Sie sich bitte an den Absender des Dokuments.
+        </div>
+
+    </div>
+</div>
+
+@code {
+    [Parameter] public string EnvelopeKey { get; set; } = string.Empty;
+
+    string AccessCode = string.Empty;
+    bool ShowCode;
+    bool IsLoading;
+    EnvelopeLoginResult? LoginResult;
+
+    async Task OnKeyDownAsync(Microsoft.AspNetCore.Components.Web.KeyboardEventArgs e) {
+        if (e.Key == "Enter")
+            await SubmitAsync();
+    }
+
+    async Task SubmitAsync() {
+        if (string.IsNullOrWhiteSpace(AccessCode) || IsLoading) return;
+
+        IsLoading = true;
+        LoginResult = null;
+        await InvokeAsync(StateHasChanged);
+
+        var result = await AuthService.LoginEnvelopeReceiverAsync(EnvelopeKey, AccessCode.Trim());
+
+        if (result == EnvelopeLoginResult.Success) {
+            Navigation.NavigateTo($"/envelope/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+            return;
+        }
+
+        LoginResult = result;
+        IsLoading = false;
+        await InvokeAsync(StateHasChanged);
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Pages/LoginSenderPage.razor

@@ -0,0 +1,172 @@
+@page "/sender/login"
+@rendermode InteractiveWebAssembly
+@using EnvelopeGenerator.WebUI.Client.Services
+@inject AuthService AuthService
+@inject NavigationManager Navigation
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<div class="login-page-wrapper d-flex align-items-center justify-content-center min-vh-100">
+    <div class="login-card card shadow border-0" style="max-width: 440px; width: 100%;">
+
+        <div class="card-header text-white text-center py-4 border-0" style="background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); border-radius: calc(0.375rem - 1px) calc(0.375rem - 1px) 0 0;">
+            <div class="mb-2">
+                <svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" fill="currentColor" viewBox="0 0 16 16">
+                    <path d="M11 6a3 3 0 1 1-6 0 3 3 0 0 1 6 0z"/>
+                    <path fill-rule="evenodd" d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8zm8-7a7 7 0 0 0-5.468 11.37C3.242 11.226 4.805 10 8 10s4.757 1.225 5.468 2.37A7 7 0 0 0 8 1z"/>
+                </svg>
+            </div>
+            <h5 class="mb-0 fw-semibold">Sender Anmeldung</h5>
+            <p class="mb-0 mt-1 opacity-75" style="font-size: 0.85rem;">Sicherer Zugang zum Sender-Dashboard</p>
+        </div>
+
+        <div class="card-body p-4">
+
+            <p class="text-muted mb-4" style="font-size: 0.875rem; line-height: 1.5;">
+                Bitte melden Sie sich mit Ihren Zugangsdaten an, um auf das Sender-Dashboard zuzugreifen.
+            </p>
+
+            @if (LoginResult == SenderLoginResult.InvalidCredentials) {
+                <div class="alert alert-danger d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z"/>
+                    </svg>
+                    <div>
+                        <strong>Ungültige Anmeldedaten.</strong><br />
+                        <span style="font-size:0.85rem;">Benutzername oder Passwort ist falsch. Bitte versuchen Sie es erneut.</span>
+                    </div>
+                </div>
+            } else if (LoginResult == SenderLoginResult.Error) {
+                <div class="alert alert-secondary d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z"/>
+                        <path d="M7.002 11a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 4.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 4.995z"/>
+                    </svg>
+                    <div>
+                        <strong>Serverfehler.</strong><br />
+                        <span style="font-size:0.85rem;">Ein unerwarteter Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.</span>
+                    </div>
+                </div>
+            }
+
+            <div class="mb-3">
+                <label class="form-label fw-medium" for="login-username">
+                    Benutzername
+                    <span class="text-danger ms-1">*</span>
+                </label>
+                <div class="input-group">
+                    <span class="input-group-text bg-light">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="#6c757d" viewBox="0 0 16 16">
+                            <path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1H3Zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6Z"/>
+                        </svg>
+                    </span>
+                    <input id="login-username"
+                           type="text"
+                           class="form-control @(LoginResult == SenderLoginResult.InvalidCredentials ? "is-invalid" : null)"
+                           placeholder="Benutzername eingeben"
+                           @bind="Username"
+                           @bind:event="oninput"
+                           @onkeydown="OnKeyDownAsync"
+                           disabled="@IsLoading"
+                           autocomplete="username" />
+                </div>
+            </div>
+
+            <div class="mb-4">
+                <label class="form-label fw-medium" for="login-password">
+                    Passwort
+                    <span class="text-danger ms-1">*</span>
+                </label>
+                <div class="input-group">
+                    <span class="input-group-text bg-light border-end-0">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="#6c757d" viewBox="0 0 16 16">
+                            <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                        </svg>
+                    </span>
+                    <input id="login-password"
+                           type="@(ShowPassword ? "text" : "password")"
+                           class="form-control border-start-0 border-end-0 @(LoginResult == SenderLoginResult.InvalidCredentials ? "is-invalid" : null)"
+                           placeholder="Passwort eingeben"
+                           @bind="Password"
+                           @bind:event="oninput"
+                           @onkeydown="OnKeyDownAsync"
+                           disabled="@IsLoading"
+                           autocomplete="current-password" />
+                    <button type="button"
+                            class="btn btn-outline-secondary border-start-0"
+                            style="border-left: none;"
+                            tabindex="-1"
+                            @onclick="() => ShowPassword = !ShowPassword">
+                        @if (ShowPassword) {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewBox="0 0 16 16">
+                                <path d="M13.359 11.238C15.06 9.72 16 8 16 8s-3-5.5-8-5.5a7.028 7.028 0 0 0-2.79.588l.77.771A5.944 5.944 0 0 1 8 3.5c2.12 0 3.879 1.168 5.168 2.457A13.134 13.134 0 0 1 14.828 8c-.058.087-.122.183-.195.288-.335.48-.83 1.12-1.465 1.755-.165.165-.337.328-.517.486l.708.709z"/>
+                                <path d="M11.297 9.176a3.5 3.5 0 0 0-4.474-4.474l.823.823a2.5 2.5 0 0 1 2.829 2.829l.822.822zm-2.943 1.299.822.822a3.5 3.5 0 0 1-4.474-4.474l.823.823a2.5 2.5 0 0 0 2.829 2.829z"/>
+                                <path d="M3.35 5.47c-.18.16-.353.322-.518.487A13.134 13.134 0 0 0 1.172 8l.195.288c.335.48.83 1.12 1.465 1.755C4.121 11.332 5.881 12.5 8 12.5c.716 0 1.39-.133 2.02-.36l.77.772A7.029 7.029 0 0 1 8 13.5C3 13.5 0 8 0 8s.939-1.721 2.641-3.238l.708.709z"/>
+                                <path fill-rule="evenodd" d="M13.646 14.354l-12-12 .708-.708 12 12-.708.708z"/>
+                            </svg>
+                        } else {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewBox="0 0 16 16">
+                                <path d="M16 8s-3-5.5-8-5.5S0 8 0 8s3 5.5 8 5.5S16 8 16 8zM1.173 8a13.133 13.133 0 0 1 1.66-2.043C4.12 4.668 5.88 3.5 8 3.5c2.12 0 3.879 1.168 5.168 2.457A13.133 13.133 0 0 1 14.828 8c-.058.087-.122.183-.195.288-.335.48-.83 1.12-1.465 1.755C11.879 11.332 10.119 12.5 8 12.5c-2.12 0-3.879-1.168-5.168-2.457A13.134 13.134 0 0 1 1.172 8z"/>
+                                <path d="M8 5.5a2.5 2.5 0 1 0 0 5 2.5 2.5 0 0 0 0-5zM4.5 8a3.5 3.5 0 1 1 7 0 3.5 3.5 0 0 1-7 0z"/>
+                            </svg>
+                        }
+                    </button>
+                </div>
+            </div>
+
+            <button class="btn btn-primary w-100 py-2 fw-medium"
+                    style="background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); border: none;"
+                    @onclick="SubmitAsync"
+                    disabled="@(IsLoading || string.IsNullOrWhiteSpace(Username) || string.IsNullOrWhiteSpace(Password))">
+                @if (IsLoading) {
+                    <span class="spinner-border spinner-border-sm me-2" role="status" aria-hidden="true"></span>
+                    <span>Anmelden …</span>
+                } else {
+                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="me-2" viewBox="0 0 16 16">
+                        <path fill-rule="evenodd" d="M10 3.5a.5.5 0 0 0-.5-.5h-8a.5.5 0 0 0-.5.5v9a.5.5 0 0 0 .5.5h8a.5.5 0 0 0 .5-.5v-2a.5.5 0 0 1 1 0v2A1.5 1.5 0 0 1 9.5 14h-8A1.5 1.5 0 0 1 0 12.5v-9A1.5 1.5 0 0 1 1.5 2h8A1.5 1.5 0 0 1 11 3.5v2a.5.5 0 0 1-1 0v-2z"/>
+                        <path fill-rule="evenodd" d="M4.146 8.354a.5.5 0 0 1 0-.708l3-3a.5.5 0 1 1 .708.708L5.707 7.5H14.5a.5.5 0 0 1 0 1H5.707l2.147 2.146a.5.5 0 0 1-.708.708l-3-3z"/>
+                    </svg>
+                    <span>Anmelden</span>
+                }
+            </button>
+
+        </div>
+
+        <div class="card-footer text-center text-muted py-3 border-0 bg-transparent" style="font-size: 0.78rem;">
+            Bei Problemen wenden Sie sich bitte an den Administrator.
+        </div>
+
+    </div>
+</div>
+
+@code {
+    string Username = string.Empty;
+    string Password = string.Empty;
+    bool ShowPassword;
+    bool IsLoading;
+    SenderLoginResult? LoginResult;
+
+    async Task OnKeyDownAsync(Microsoft.AspNetCore.Components.Web.KeyboardEventArgs e) {
+        if (e.Key == "Enter")
+            await SubmitAsync();
+    }
+
+    async Task SubmitAsync() {
+        if (string.IsNullOrWhiteSpace(Username) || string.IsNullOrWhiteSpace(Password) || IsLoading) return;
+
+        IsLoading = true;
+        LoginResult = null;
+        await InvokeAsync(StateHasChanged);
+
+        var result = await AuthService.LoginSenderAsync(Username.Trim(), Password.Trim());
+
+        if (result == SenderLoginResult.Success) {
+            Navigation.NavigateTo("/sender", forceLoad: true);
+            return;
+        }
+
+        LoginResult = result;
+        IsLoading = false;
+        await InvokeAsync(StateHasChanged);
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/PredefinedReports/Report.resx

@@ -0,0 +1,123 @@
+<?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.WebUI/EnvelopeGenerator.WebUI.Client/PredefinedReports/ReportsFactory.cs

@@ -0,0 +1,14 @@
+using DevExpress.XtraReports.UI;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Program.cs

@@ -0,0 +1,55 @@
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using EnvelopeGenerator.WebUI.Client.Services;
+using EnvelopeGenerator.WebUI.Client.Options;
+using DevExpress.Blazor.Reporting;
+using DevExpress.XtraReports.Web.Extensions;
+using DevExpress.DataAccess.Web;
+using DevExpress.XtraReports.Services;
+
+var builder = WebAssemblyHostBuilder.CreateDefault(args);
+
+// HTTP Client (uses WebUI's YARP proxy)
+builder.Services.AddScoped(sp => new HttpClient { 
+    BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) 
+});
+
+// Configuration Options
+builder.Services.Configure<ApiOptions>(opts =>
+    builder.Configuration.GetSection(ApiOptions.SectionName).Bind(opts));
+builder.Services.Configure<PdfViewerOptions>(opts =>
+    builder.Configuration.GetSection(PdfViewerOptions.SectionName).Bind(opts));
+
+// Business Services
+builder.Services.AddScoped<DocumentService>();
+builder.Services.AddScoped<AuthService>();
+builder.Services.AddScoped<AnnotationService>();
+builder.Services.AddScoped<EnvelopeReceiverService>();
+builder.Services.AddScoped<SignatureService>();
+builder.Services.AddScoped<SignatureCacheService>();
+builder.Services.AddSingleton<AppVersionService>();
+
+// DevExpress WASM
+builder.Services.AddDevExpressWebAssemblyBlazorPdfViewer();
+builder.Services.AddDevExpressWebAssemblyBlazorReportViewer();
+
+builder.Services.AddDevExpressBlazorReportingWebAssembly(configure => {
+    configure.UseDevelopmentMode();
+});
+
+// Reporting Services
+builder.Services.AddScoped<IDataSourceWizardJsonConnectionStorage, CustomDataSourceWizardJsonDataConnectionStorage>();
+builder.Services.AddScoped<IJsonDataConnectionProviderFactory, CustomJsonDataConnectionProviderFactory>();
+builder.Services.AddScoped<IObjectDataSourceWizardTypeProvider, ObjectDataSourceWizardCustomTypeProvider>();
+
+DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EnvelopeGenerator.WebUI.Client.Data.DataItemList));
+DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Routes.razor

@@ -0,0 +1,6 @@
+<Router AppAssembly="typeof(Program).Assembly">
+    <Found Context="routeData">
+        <RouteView RouteData="routeData" DefaultLayout="typeof(Layout.MainLayout)" />
+        <FocusOnNavigate RouteData="routeData" Selector="h1" />
+    </Found>
+</Router>

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/AnnotationService.cs

@@ -0,0 +1,33 @@
+using System.Net.Http.Json;
+using System.Text.Json;
+using EnvelopeGenerator.WebUI.Client.Models;
+using EnvelopeGenerator.WebUI.Client.Options;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+/// <summary>
+/// Retrieves annotation positions from the API.
+/// The URL is composed as <c>{BaseUrl}/api/Annotation/{envelopeKey}</c>.
+/// During development, <c>BaseUrl</c> is empty so the request resolves to the
+/// YARP-proxied route on the same origin, which currently serves
+/// <c>fake-data/annotations.json</c>. To switch to real data, update the
+/// YARP route in <c>yarp.json</c> – no code change required.
+/// </summary>
+[Obsolete("Use SignatureService.")]
+public class AnnotationService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private static readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web);
+
+    public async Task<IReadOnlyList<AnnotationDto>> GetAnnotationsAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var url = $"{apiOptions.Value.BaseUrl}/api/Annotation/{Uri.EscapeDataString(envelopeKey)}";
+        var response = await http.GetAsync(url, cancel);
+
+        if (!response.IsSuccessStatusCode)
+            return [];
+
+        var result = await response.Content.ReadFromJsonAsync<List<AnnotationDto>>(_jsonOptions, cancel);
+        return result ?? [];
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/AppVersionService.cs

@@ -0,0 +1,26 @@
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+/// <summary>
+/// Provides application version for cache busting static assets.
+/// Version is automatically incremented on each build via AssemblyVersion.
+/// </summary>
+public class AppVersionService
+{
+    /// <summary>
+    /// Current application version (e.g., "1.0.0.0")
+    /// </summary>
+    public string Version { get; }
+
+    public AppVersionService()
+    {
+        // Get version from assembly metadata
+        Version = typeof(AppVersionService).Assembly.GetName().Version?.ToString() ?? "1.0.0.0";
+    }
+
+    /// <summary>
+    /// Generates versioned URL for static assets (cache busting)
+    /// </summary>
+    /// <param name="path">Asset path (e.g., "css/envelope-viewer.css")</param>
+    /// <returns>Versioned URL (e.g., "css/envelope-viewer.css?v=1.0.0.0")</returns>
+    public string GetVersionedUrl(string path) => $"{path}?v={Version}";
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/AuthService.cs

@@ -0,0 +1,81 @@
+using System.Net;
+using System.Net.Http.Json;
+using EnvelopeGenerator.WebUI.Client.Options;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+public enum EnvelopeLoginResult { Success, InvalidCode, NotFound, Error }
+
+public enum SenderLoginResult { Success, InvalidCredentials, Error }
+
+public class AuthService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private readonly ApiOptions _api = apiOptions.Value;
+
+    /// <summary>
+    /// Checks whether the current user holds a valid receiver token for the given envelope key.
+    /// Calls GET /api/auth/check/envelope/{envelopeKey}.
+    /// </summary>
+    public async Task<bool> CheckEnvelopeAccessAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var response = await http.GetAsync($"{_api.BaseUrl}/api/auth/check/envelope/{Uri.EscapeDataString(envelopeKey)}", cancel);
+        return response.StatusCode == HttpStatusCode.OK;
+    }
+
+    /// <summary>
+    /// Submits the access code for the given envelope key.
+    /// Calls POST /api/Auth/envelope-receiver/{key} with multipart/form-data.
+    /// On success the API sets an authentication cookie automatically.
+    /// </summary>
+    public async Task<EnvelopeLoginResult> LoginEnvelopeReceiverAsync(string envelopeKey, string accessCode, CancellationToken cancel = default)
+    {
+        var form = new MultipartFormDataContent();
+        form.Add(new StringContent(accessCode), "AccessCode");
+
+        var response = await http.PostAsync(
+            $"{_api.BaseUrl}/api/Auth/envelope-receiver/{Uri.EscapeDataString(envelopeKey)}",
+            form, cancel);
+
+        return response.StatusCode switch
+        {
+            HttpStatusCode.OK => EnvelopeLoginResult.Success,
+            HttpStatusCode.Unauthorized => EnvelopeLoginResult.InvalidCode,
+            HttpStatusCode.NotFound => EnvelopeLoginResult.NotFound,
+            _ => EnvelopeLoginResult.Error
+        };
+    }
+
+    /// <summary>
+    /// Removes the per-envelope receiver cookie for the given envelope key.
+    /// Calls POST /api/auth/logout/envelope/{envelopeKey}.
+    /// </summary>
+    public async Task<bool> LogoutEnvelopeReceiverAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var response = await http.PostAsync(
+            $"{_api.BaseUrl}/api/auth/logout/envelope/{Uri.EscapeDataString(envelopeKey)}",
+            null, cancel);
+        return response.IsSuccessStatusCode;
+    }
+
+    /// <summary>
+    /// Authenticates a sender user with username and password.
+    /// Calls POST /api/auth?cookie=true with JSON body.
+    /// On success the API sets an authentication cookie automatically.
+    /// </summary>
+    public async Task<SenderLoginResult> LoginSenderAsync(string username, string password, CancellationToken cancel = default)
+    {
+        var requestBody = new { username, password };
+
+        var response = await http.PostAsJsonAsync(
+            $"{_api.BaseUrl}/api/auth?cookie=true",
+            requestBody, cancel);
+
+        return response.StatusCode switch
+        {
+            HttpStatusCode.OK => SenderLoginResult.Success,
+            HttpStatusCode.Unauthorized => SenderLoginResult.InvalidCredentials,
+            _ => SenderLoginResult.Error
+        };
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/CustomDataSourceWizardJsonDataConnectionStorage.cs

@@ -0,0 +1,40 @@
+using DevExpress.DataAccess.Json;
+using DevExpress.DataAccess.Web;
+using DevExpress.DataAccess.Wizard.Services;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Services/CustomJsonDataConnectionProviderFactory.cs

@@ -0,0 +1,24 @@
+using DevExpress.DataAccess.Json;
+using DevExpress.DataAccess.Web;
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Services/CustomReportProvider.cs

@@ -0,0 +1,21 @@
+using DevExpress.XtraReports.UI;
+using DevExpress.XtraReports.Services;
+using EnvelopeGenerator.WebUI.Client.PredefinedReports;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Services/DocumentService.cs

@@ -0,0 +1,34 @@
+using System.Net;
+using System.Net.Http;
+using Microsoft.Extensions.Options;
+using EnvelopeGenerator.WebUI.Client.Options;
+
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+public class DocumentService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private readonly ApiOptions _api = apiOptions.Value;
+
+    /// <summary>
+    /// Fetches the PDF bytes for the given envelope key from the API.
+    /// Throws HttpRequestException on failure with appropriate status code.
+    /// </summary>
+    /// <exception cref="HttpRequestException">Thrown when the API request fails.</exception>
+    public async Task<byte[]?> GetDocumentAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var response = await http.GetAsync($"{_api.BaseUrl}/api/Document/{Uri.EscapeDataString(envelopeKey)}", cancel);
+
+        if (!response.IsSuccessStatusCode)
+        {
+            var statusCode = (int)response.StatusCode;
+            var reasonPhrase = response.ReasonPhrase ?? "Unknown error";
+            throw new HttpRequestException(
+                $"Failed to load document. Status: {statusCode} ({reasonPhrase})",
+                null,
+                response.StatusCode);
+        }
+
+        var bytes = await response.Content.ReadAsByteArrayAsync(cancel);
+        return bytes;
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/EnvelopeReceiverService.cs

@@ -0,0 +1,40 @@
+using System.Net;
+using System.Net.Http.Json;
+using System.Text.Json;
+using EnvelopeGenerator.WebUI.Client.Models;
+using EnvelopeGenerator.WebUI.Client.Options;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+/// <summary>
+/// Retrieves the <see cref="EnvelopeReceiverDto"/> for the authenticated receiver
+/// from <c>GET api/EnvelopeReceiver/{envelopeKey}</c>.
+/// </summary>
+public class EnvelopeReceiverService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private static readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web);
+
+    /// <summary>
+    /// Fetches the envelope receiver data for the given envelope key from the API.
+    /// Throws HttpRequestException on failure with appropriate status code.
+    /// </summary>
+    /// <exception cref="HttpRequestException">Thrown when the API request fails.</exception>
+    public async Task<EnvelopeReceiverDto?> GetAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var url = $"{apiOptions.Value.BaseUrl}/api/EnvelopeReceiver/{Uri.EscapeDataString(envelopeKey)}";
+        var response = await http.GetAsync(url, cancel);
+
+        if (!response.IsSuccessStatusCode)
+        {
+            var statusCode = (int)response.StatusCode;
+            var reasonPhrase = response.ReasonPhrase ?? "Unknown error";
+            throw new HttpRequestException(
+                $"Failed to load envelope receiver data. Status: {statusCode} ({reasonPhrase})",
+                null,
+                response.StatusCode);
+        }
+
+        return await response.Content.ReadFromJsonAsync<EnvelopeReceiverDto>(_jsonOptions, cancel);
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/FontLoader.cs

@@ -0,0 +1,12 @@
+using DevExpress.Drawing;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Services/InMemoryReportStorageWebExtension.cs

@@ -0,0 +1,83 @@
+using DevExpress.XtraReports.UI;
+using DevExpress.XtraReports.Web.Extensions;
+using EnvelopeGenerator.WebUI.Client.PredefinedReports;
+
+namespace EnvelopeGenerator.WebUI.Client.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.WebUI/EnvelopeGenerator.WebUI.Client/Services/ObjectDataSourceWizardCustomTypeProvider.cs

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

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/SignatureCacheService.cs

@@ -0,0 +1,66 @@
+using System.Net.Http.Json;
+using Microsoft.Extensions.Options;
+using EnvelopeGenerator.WebUI.Client.Options;
+using EnvelopeGenerator.WebUI.Client.Models;
+
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+/// <summary>
+/// Client service for managing cached signatures via API.
+/// </summary>
+public class SignatureCacheService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private readonly ApiOptions _api = apiOptions.Value;
+
+    public async Task SaveSignatureAsync(
+        string envelopeKey,
+        SignatureCaptureDto signature,
+        CancellationToken cancel = default)
+    {
+        var response = await http.PostAsJsonAsync(
+            $"{_api.BaseUrl}/api/Cache/SignatureCapture/{Uri.EscapeDataString(envelopeKey)}",
+            signature,
+            cancel);
+
+        if (!response.IsSuccessStatusCode)
+        {
+            var error = await response.Content.ReadAsStringAsync(cancel);
+            throw new HttpRequestException($"Failed to cache signature: {response.StatusCode} - {error}");
+        }
+    }
+
+    public async Task<SignatureCaptureDto?> GetSignatureAsync(
+        string envelopeKey,
+        CancellationToken cancel = default)
+    {
+        var response = await http.GetAsync(
+            $"{_api.BaseUrl}/api/Cache/SignatureCapture/{Uri.EscapeDataString(envelopeKey)}",
+            cancel);
+
+        if (response.StatusCode == System.Net.HttpStatusCode.NotFound)
+            return null;
+
+        if (!response.IsSuccessStatusCode)
+        {
+            var error = await response.Content.ReadAsStringAsync(cancel);
+            throw new HttpRequestException($"Failed to retrieve signature: {response.StatusCode} - {error}");
+        }
+
+        return await response.Content.ReadFromJsonAsync<SignatureCaptureDto>(cancellationToken: cancel);
+    }
+
+    public async Task DeleteSignatureAsync(
+        string envelopeKey,
+        CancellationToken cancel = default)
+    {
+        var response = await http.DeleteAsync(
+            $"{_api.BaseUrl}/api/Cache/SignatureCapture/{Uri.EscapeDataString(envelopeKey)}",
+            cancel);
+
+        if (!response.IsSuccessStatusCode)
+        {
+            var error = await response.Content.ReadAsStringAsync(cancel);
+            throw new HttpRequestException($"Failed to delete signature: {response.StatusCode} - {error}");
+        }
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/Services/SignatureService.cs

@@ -0,0 +1,24 @@
+using System.Net.Http.Json;
+using System.Text.Json;
+using EnvelopeGenerator.WebUI.Client.Models;
+using EnvelopeGenerator.WebUI.Client.Options;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.WebUI.Client.Services;
+
+public class SignatureService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private static readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web);
+
+    public async Task<IReadOnlyList<SignatureDto>> GetAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var url = $"{apiOptions.Value.BaseUrl}/api/Signature/{Uri.EscapeDataString(envelopeKey)}";
+        var response = await http.GetAsync(url, cancel);
+
+        if (!response.IsSuccessStatusCode)
+            throw new HttpRequestException($"Failed to retrieve signatures for envelope {envelopeKey}: {response.StatusCode} {response.ReasonPhrase}");
+
+        var result = await response.Content.ReadFromJsonAsync<List<SignatureDto>>(_jsonOptions, cancel);
+        return result ?? [];
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.Client/_Imports.razor

@@ -0,0 +1,16 @@
+@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 static Microsoft.AspNetCore.Components.Web.RenderMode
+@using Microsoft.AspNetCore.Components.Web.Virtualization
+@using Microsoft.AspNetCore.Components.WebAssembly.Http
+@using Microsoft.JSInterop
+@using EnvelopeGenerator.WebUI.Client
+@using EnvelopeGenerator.WebUI.Client.Services
+@using EnvelopeGenerator.WebUI.Client.Models
+@using EnvelopeGenerator.WebUI.Client.Options
+@using DevExpress.Blazor
+@using DevExpress.Blazor.PdfViewer
+@using DevExpress.Blazor.Reporting

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Components/App.razor

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <base href="/" />
+    <link rel="stylesheet" href="app.css" />
+    <link rel="stylesheet" href="EnvelopeGenerator.WebUI.styles.css" />
+    <HeadOutlet @rendermode="InteractiveAuto" />
+</head>
+
+<body>
+    <Routes @rendermode="InteractiveAuto" />
+    <script src="_framework/blazor.web.js"></script>
+</body>
+
+</html>

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Components/Pages/EnvelopeReceiverPage_DxPdfViewer.razor

@@ -0,0 +1,113 @@
+@page "/envelope/DxPdfViewer"
+@rendermode InteractiveServer
+@using System.IO
+@using DevExpress.Blazor
+@using System.Reflection
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<style>
+    .custom-drop-zone {
+        padding: 0 !important;
+        border-style: dashed;
+        border-width: 2px !important;
+        height: 230px;
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+        justify-content: center;
+        background-color: rgba(183, 183, 183, 0.1);
+    }
+
+        .custom-drop-zone.custom-drop-zone-hover {
+            border-style: solid;
+        }
+
+        .custom-drop-zone svg {
+            width: 42px;
+            height: 42px;
+        }
+
+        .custom-drop-zone > *:not(#overviewDemoSelectButton) {
+            pointer-events: none;
+        }
+
+    .pdf-viewer {
+        height: 800px !important;
+        min-height: 800px !important;
+    }
+
+    .pdf-viewer .dxbrv-surface-wrapper,
+    .pdf-viewer .dxbrv-document-surface {
+        height: 100% !important;
+        min-height: 750px !important;
+    }
+
+    .pdf-viewer .dxbrv-report-preview-content {
+        width: auto !important;
+        height: auto !important;
+        min-width: 200px !important;
+        min-height: 200px !important;
+    }
+</style>
+
+<div id="overviewDemoDropZone" class="card custom-drop-zone rounded-3 w-100 m-0">
+    <span class="drop-file-icon mb-3"></span>
+    <span class="drop-file-label">Drag and Drop File Here</span><span class="m-1">or</span>
+    <DxButton Id="overviewDemoSelectButton"
+              CssClass="m-1"
+              RenderStyle="ButtonRenderStyle.Primary"
+              Text="Select File" />
+</div>
+<DxFileInput @ref="fileInput"
+             AcceptedFileTypes="@ALLOWED_FILE_TYPES"
+             AllowedFileExtensions="@ALLOWED_FILE_TYPES"
+             CssClass="w-100"
+             ExternalDropZoneCssSelector="#overviewDemoDropZone"
+             ExternalDropZoneDragOverCssClass="custom-drop-zone-hover"
+             ExternalSelectButtonCssSelector="#overviewDemoSelectButton"
+             FilesUploading="OnFilesUploading"
+             MaxFileSize="2000000">
+</DxFileInput>
+
+@if (DocumentContent != null && DocumentContent.Length > 0)
+{
+    <div class="alert alert-success mt-3">
+        PDF loaded: @DocumentContent.Length bytes
+    </div>
+    <DxPdfViewer CssClass="w-100 pdf-viewer" DocumentContent="@DocumentContent" />
+}
+else
+{
+    <div class="alert alert-info mt-3">
+        Please upload a PDF file to view it.
+    </div>
+}
+
+@code {
+    readonly List<string> ALLOWED_FILE_TYPES = new List<string> { ".pdf" };
+    DxFileInput fileInput;
+    byte[] DocumentContent { get; set; }
+    protected override void OnInitialized()
+    {
+        Assembly assembly = Assembly.GetExecutingAssembly();
+        Stream stream = assembly.GetManifestResourceStream("EnvelopeGenerator.WebUI.Resources.Invoice.pdf");
+        if (stream != null)
+        {
+            using (stream)
+            using (var binaryReader = new BinaryReader(stream))
+                DocumentContent = binaryReader.ReadBytes((int)stream.Length);
+        }
+    }
+    protected async Task OnFilesUploading(FilesUploadingEventArgs args)
+    {
+        using (MemoryStream stream = new MemoryStream())
+        {
+            IFileInputSelectedFile file = args.Files[0];
+            await file.OpenReadStream(file.Size).CopyToAsync(stream);
+            DocumentContent = stream.ToArray();
+            await InvokeAsync(StateHasChanged);
+        }
+    }
+}
+

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Components/Pages/EnvelopeReceiverPage_DxReportViewer.razor

@@ -0,0 +1,50 @@
+@page "/envelope/{EnvelopeKey}/DxReportViewer"
+@rendermode InteractiveServer
+@using XtraReport = DevExpress.XtraReports.UI.XtraReport
+@using DevExpress.Blazor.Reporting
+@using Microsoft.Extensions.Options
+@using EnvelopeGenerator.WebUI.Client.Options
+@using EnvelopeGenerator.WebUI.Client.Services
+@inject InMemoryReportStorageWebExtension ReportStorage
+@inject DocumentService DocumentService
+@inject IOptions<ApiOptions> AppOptions
+
+<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" />
+
+
+@if (_report is not null) {
+    <DxReportViewer Report="_report" RootCssClasses="w-100 h-100" Zoom="1.3" />
+}
+
+@code {
+    [Parameter] public string EnvelopeKey { get; init; } = null!;
+
+    XtraReport? _report = null;
+
+    protected override async Task OnInitializedAsync() 
+    {
+        _report = await CreateReport();
+    }
+
+    async Task<XtraReport> CreateReport()
+    {
+        if (AppOptions.Value.UsePredefinedReports)
+        {
+            return Client.PredefinedReports.ReportsFactory.GetReport("LargeDatasetReport");
+        }
+        else
+        {
+
+            var pdfBytes = await DocumentService.GetDocumentAsync(EnvelopeKey);
+            if (pdfBytes is null || pdfBytes.Length == 0)
+                throw new InvalidOperationException($"No PDF bytes found for EnvelopeKey: {EnvelopeKey}");
+
+            var report = new XtraReport();
+            var detail = new DevExpress.XtraReports.UI.DetailBand();
+            report.Bands.Add(detail);
+            detail.Controls.Add(new DevExpress.XtraReports.UI.XRPdfContent { Source = pdfBytes, GenerateOwnPages = true });
+            return report;
+        }
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Components/Pages/EnvelopeReceiverPage_embed.razor

@@ -0,0 +1,124 @@
+@page "/envelope/Embed"
+@rendermode InteractiveServer
+@using System.IO
+@using DevExpress.Blazor
+@using System.Reflection
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<style>
+    .custom-drop-zone {
+        padding: 0 !important;
+        border-style: dashed;
+        border-width: 2px !important;
+        height: 230px;
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+        justify-content: center;
+        background-color: rgba(183, 183, 183, 0.1);
+    }
+
+        .custom-drop-zone.custom-drop-zone-hover {
+            border-style: solid;
+        }
+
+        .custom-drop-zone svg {
+            width: 42px;
+            height: 42px;
+        }
+
+        .custom-drop-zone > *:not(#overviewDemoSelectButton) {
+            pointer-events: none;
+        }
+
+    .pdf-viewer {
+        height: 800px !important;
+        min-height: 800px !important;
+    }
+
+    .pdf-viewer .dxbrv-surface-wrapper,
+    .pdf-viewer .dxbrv-document-surface {
+        height: 100% !important;
+        min-height: 750px !important;
+    }
+
+    .pdf-viewer .dxbrv-report-preview-content {
+        width: auto !important;
+        height: auto !important;
+        min-width: 200px !important;
+        min-height: 200px !important;
+    }
+</style>
+
+<div id="overviewDemoDropZone" class="card custom-drop-zone rounded-3 w-100 m-0">
+    <span class="drop-file-icon mb-3"></span>
+    <span class="drop-file-label">Drag and Drop File Here</span><span class="m-1">or</span>
+    <DxButton Id="overviewDemoSelectButton"
+              CssClass="m-1"
+              RenderStyle="ButtonRenderStyle.Primary"
+              Text="Select File" />
+</div>
+<DxFileInput @ref="fileInput"
+             AcceptedFileTypes="@ALLOWED_FILE_TYPES"
+             AllowedFileExtensions="@ALLOWED_FILE_TYPES"
+             CssClass="w-100"
+             ExternalDropZoneCssSelector="#overviewDemoDropZone"
+             ExternalDropZoneDragOverCssClass="custom-drop-zone-hover"
+             ExternalSelectButtonCssSelector="#overviewDemoSelectButton"
+             FilesUploading="OnFilesUploading"
+             MaxFileSize="2000000">
+</DxFileInput>
+
+@if (DocumentContent != null && DocumentContent.Length > 0)
+{
+    <div class="alert alert-success mt-3">
+        PDF loaded: @DocumentContent.Length bytes
+    </div>
+    <embed src="@GetPdfDataUrl()" type="application/pdf" class="w-100 pdf-viewer" />
+}
+else
+{
+    <div class="alert alert-info mt-3">
+        Please upload a PDF file to view it.
+    </div>
+}
+
+@code {
+    readonly List<string> ALLOWED_FILE_TYPES = new List<string> { ".pdf" };
+    DxFileInput fileInput;
+    byte[] DocumentContent { get; set; }
+    
+    protected override void OnInitialized()
+    {
+        Assembly assembly = Assembly.GetExecutingAssembly();
+        Stream stream = assembly.GetManifestResourceStream("EnvelopeGenerator.WebUI.Resources.Invoice.pdf");
+        if (stream != null)
+        {
+            using (stream)
+            using (var binaryReader = new BinaryReader(stream))
+                DocumentContent = binaryReader.ReadBytes((int)stream.Length);
+        }
+    }
+    
+    protected async Task OnFilesUploading(FilesUploadingEventArgs args)
+    {
+        using (MemoryStream stream = new MemoryStream())
+        {
+            IFileInputSelectedFile file = args.Files[0];
+            await file.OpenReadStream(file.Size).CopyToAsync(stream);
+            DocumentContent = stream.ToArray();
+            await InvokeAsync(StateHasChanged);
+        }
+    }
+    
+    private string GetPdfDataUrl()
+    {
+        if (DocumentContent == null || DocumentContent.Length == 0)
+            return string.Empty;
+        
+        string base64 = Convert.ToBase64String(DocumentContent);
+        return $"data:application/pdf;base64,{base64}#toolbar=0&navpanes=0&scrollbar=1";
+    }
+}
+

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/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;
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Components/_Imports.razor

@@ -0,0 +1,11 @@
+@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 static Microsoft.AspNetCore.Components.Web.RenderMode
+@using Microsoft.AspNetCore.Components.Web.Virtualization
+@using Microsoft.JSInterop
+@using EnvelopeGenerator.WebUI
+@using EnvelopeGenerator.WebUI.Client
+@using EnvelopeGenerator.WebUI.Components

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\EnvelopeGenerator.WebUI.Client\EnvelopeGenerator.WebUI.Client.csproj" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="8.0.22" />
+    <PackageReference Include="Yarp.ReverseProxy" Version="2.1.0" />
+    <PackageReference Include="DevExpress.Blazor" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Blazor.PdfViewer" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Blazor.Reporting.Viewer" Version="25.2.3" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Update="yarp.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+</Project>

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Program.cs

@@ -0,0 +1,56 @@
+using EnvelopeGenerator.WebUI.Components;
+using DevExpress.Blazor;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Load YARP configuration
+builder.Configuration.AddJsonFile("yarp.json", optional: false, reloadOnChange: true);
+
+// Add services to the container.
+builder.Services.AddRazorComponents()
+    .AddInteractiveServerComponents()
+    .AddInteractiveWebAssemblyComponents();
+
+// YARP Reverse Proxy
+builder.Services.AddReverseProxy()
+    .LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
+
+// DevExpress Server-Side Services (CRITICAL for DxPdfViewer)
+builder.Services.AddDevExpressBlazor(configure => configure.BootstrapVersion = BootstrapVersion.v5);
+builder.Services.AddDevExpressServerSideBlazorPdfViewer();
+
+// Configuration Options
+builder.Services.Configure<EnvelopeGenerator.WebUI.Client.Options.ApiOptions>(
+    builder.Configuration.GetSection("ApiOptions"));
+builder.Services.Configure<EnvelopeGenerator.WebUI.Client.Options.PdfViewerOptions>(
+    builder.Configuration.GetSection("PdfViewerOptions"));
+
+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.UseHttpsRedirection();
+
+app.UseStaticFiles();
+app.UseAntiforgery();
+
+// Blazor routing (BEFORE YARP - important order!)
+app.MapRazorComponents<App>()
+    .AddInteractiveServerRenderMode()
+    .AddInteractiveWebAssemblyRenderMode()
+    .AddAdditionalAssemblies(typeof(EnvelopeGenerator.WebUI.Client._Imports).Assembly);
+
+// YARP proxy (AFTER Blazor - catch-all for /api/*)
+app.MapReverseProxy();
+
+app.Run();

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/Properties/launchSettings.json

@@ -0,0 +1,41 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+    "iisSettings": {
+      "windowsAuthentication": false,
+      "anonymousAuthentication": true,
+      "iisExpress": {
+        "applicationUrl": "http://localhost:22250",
+        "sslPort": 44329
+      }
+    },
+    "profiles": {
+      "http": {
+        "commandName": "Project",
+        "dotnetRunMessages": true,
+        "launchBrowser": true,
+        "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
+        "applicationUrl": "http://localhost:5092",
+        "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:7041;http://localhost:5092",
+        "environmentVariables": {
+          "ASPNETCORE_ENVIRONMENT": "Development"
+        }
+      },
+      "IIS Express": {
+        "commandName": "IISExpress",
+        "launchBrowser": true,
+        "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
+        "environmentVariables": {
+          "ASPNETCORE_ENVIRONMENT": "Development"
+        }
+      }
+    }
+  }

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/appsettings.Development.json

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

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/appsettings.json

@@ -0,0 +1,18 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "ApiOptions": {
+    "BaseUrl": ""
+  },
+  "PdfViewerOptions": {
+    "ThumbnailBaseScale": 0.75,
+    "ThumbnailEnableHiDPI": true,
+    "MainCanvasEnableHiDPI": true,
+    "ZoomStepPercentage": 5
+  }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/app.css

@@ -0,0 +1,29 @@
+h1:focus {
+    outline: none;
+}
+
+.valid.modified:not([type=checkbox]) {
+    outline: 1px solid #26b050;
+}
+
+.invalid {
+    outline: 1px solid #e50000;
+}
+
+.validation-message {
+    color: #e50000;
+}
+
+.blazor-error-boundary {
+    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
+    padding: 1rem 1rem 1rem 3.7rem;
+    color: white;
+}
+
+    .blazor-error-boundary::after {
+        content: "An error has occurred."
+    }
+
+.darker-border-checkbox.form-check-input {
+    border-color: #929292;
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/appsettings.json

@@ -0,0 +1,17 @@
+{
+  "ApiOptions": {
+    "BaseUrl": ""
+  },
+  "PdfViewerOptions": {
+    "ThumbnailBaseScale": 0.75,
+    "ThumbnailEnableHiDPI": true,
+    "ThumbnailMaxDPR": 2.0,
+    "MainCanvasEnableHiDPI": true,
+    "MainCanvasMaxDPR": 2.0,
+    "EnableSmoothZoom": true,
+    "ZoomTransitionDuration": 900,
+    "RenderingOpacity": 0.85,
+    "ThumbnailRenderDelay": 50,
+    "ZoomStepPercentage": 5
+  }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/app.css

@@ -0,0 +1,368 @@
+@import url('open-iconic/font/css/open-iconic-bootstrap.min.css');
+
+html, body {
+    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
+    padding: 0;
+    margin: 0;
+    width: 100%;
+}
+
+html, body {
+    height: 100%;
+    overflow: hidden;
+}
+
+main, .page {
+    margin: 0;
+    padding: 0;
+    width: 100%;
+}
+
+article {
+    height: calc(100vh - 36px);
+    display: flex;
+    flex-direction: column;
+    overflow-y: auto;
+    padding: 0 !important;
+    margin: 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 - 166px) !important;
+    width: 100% !important;
+}
+
+/* ── Force DevExpress viewer pages into a single centered column ─────────── */
+.dxbrv-report-preview-content {
+    display: flex !important;
+    flex-direction: column !important;
+    align-items: center !important;
+}
+
+/* ── Annotation signature checkbox overlays ─────────────────────────────── */
+.annot-sig-cb-wrapper {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 8px;
+    border-radius: 6px;
+    font-size: 0.75rem;
+    font-weight: 600;
+    font-family: "Segoe UI", Arial, sans-serif;
+    padding: 0 12px;
+    overflow: hidden;
+    cursor: pointer;
+    user-select: none;
+    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
+    border: none;
+    color: #ffffff;
+    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.35);
+    transition: box-shadow 0.18s, filter 0.18s;
+}
+
+.annot-sig-cb-wrapper:hover {
+    filter: brightness(1.12);
+    box-shadow: 0 4px 14px rgba(44, 62, 80, 0.45);
+}
+
+.annot-sig-cb-wrapper--checked {
+    background: linear-gradient(135deg, #1a6b2a 0%, #27ae60 100%);
+    box-shadow: 0 2px 8px rgba(26, 107, 42, 0.35);
+}
+
+.annot-sig-cb-wrapper--checked:hover {
+    filter: brightness(1.1);
+    box-shadow: 0 4px 14px rgba(26, 107, 42, 0.45);
+}
+
+.annot-sig-cb {
+    display: none;
+}
+
+.annot-sig-cb__label {
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    pointer-events: none;
+    letter-spacing: 0.01em;
+}
+
+/* ── Envelope info header ────────────────────────────────────────────────── */
+.receiver-info-header {
+    border-bottom: 1px solid rgba(0,0,0,.08);
+}
+
+.receiver-info-header__gradient {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    flex-wrap: wrap;
+    gap: 8px;
+    padding: 10px 16px 8px;
+    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
+    color: #fff;
+}
+
+.receiver-info-header__left {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    min-width: 0;
+}
+
+.receiver-info-header__icon {
+    flex-shrink: 0;
+    opacity: .85;
+}
+
+.receiver-info-header__title {
+    font-size: 0.92rem;
+    font-weight: 600;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    max-width: 340px;
+}
+
+.receiver-info-header__sender {
+    font-size: 0.72rem;
+    opacity: .8;
+    margin-top: 1px;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    max-width: 400px;
+}
+
+.receiver-info-header__badges {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 5px;
+    align-items: center;
+}
+
+.receiver-info-badge {
+    display: inline-flex;
+    align-items: center;
+    background: rgba(255,255,255,.18);
+    color: #fff;
+    border-radius: 20px;
+    padding: 2px 9px;
+    font-size: 0.70rem;
+    font-weight: 500;
+    white-space: nowrap;
+}
+
+.receiver-info-badge--muted {
+    background: rgba(255,255,255,.10);
+    opacity: .8;
+}
+
+.receiver-info-badge--accent {
+    background: rgba(39,174,96,.35);
+    border: 1px solid rgba(39,174,96,.5);
+}
+
+.receiver-info-message {
+    padding: 7px 16px;
+    font-size: 0.78rem;
+    color: #444;
+    border-bottom: 1px solid rgba(0,0,0,.05);
+    white-space: pre-wrap;
+    line-height: 1.45;
+}
+
+.receiver-info-private-message {
+    display: flex;
+    align-items: flex-start;
+    gap: 4px;
+    padding: 5px 16px 6px;
+    font-size: 0.75rem;
+    color: #5a5a72;
+    background: #f8f7ff;
+    border-top: 1px solid rgba(90,80,180,.12);
+}
+
+/* ── Signature action bar ────────────────────────────────────────────────── */
+.receiver-action-bar {
+    border-bottom: 1px solid rgba(0,0,0,.08);
+    background: #fff;
+}
+
+.receiver-action-bar__inner {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: 10px;
+    padding: 7px 14px;
+}
+
+.receiver-action-bar__progress {
+    display: flex;
+    align-items: center;
+    gap: 7px;
+    flex-wrap: wrap;
+}
+
+/* ── Home page ───────────────────────────────────────────────────────────── */
+.home-page-wrapper {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    min-height: calc(100vh - 36px);
+    background: linear-gradient(160deg, #1e2e3e 0%, #2c3e50 40%, #3498db 100%);
+    padding-bottom: 36px;
+}
+
+.home-hero-header {
+    width: 100%;
+    padding: 48px 24px 36px;
+    text-align: center;
+}
+
+.home-hero-header__inner {
+    display: inline-flex;
+    align-items: center;
+    gap: 20px;
+    color: #fff;
+}
+
+.home-hero-header__icon {
+    opacity: 0.90;
+    flex-shrink: 0;
+}
+
+.home-hero-header__title {
+    font-size: 2rem;
+    font-weight: 700;
+    margin: 0;
+    color: #fff;
+    letter-spacing: 0.02em;
+}
+
+.home-hero-header__subtitle {
+    font-size: 0.92rem;
+    margin: 4px 0 0;
+    color: rgba(255,255,255,0.75);
+}
+
+.home-content {
+    width: 100%;
+    max-width: 520px;
+    padding: 0 16px;
+}
+
+.home-card {
+    border-radius: 12px !important;
+    overflow: hidden;
+}
+
+.home-btn-primary {
+    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
+    border: none;
+    color: #fff;
+    font-weight: 500;
+    border-radius: 8px;
+    transition: filter 0.15s, box-shadow 0.15s;
+    box-shadow: 0 2px 10px rgba(44,62,80,0.30);
+}
+
+.home-btn-primary:hover {
+    filter: brightness(1.12);
+    box-shadow: 0 4px 16px rgba(44,62,80,0.40);
+    color: #fff;
+}
+
+.home-feature-badge {
+    display: inline-flex;
+    align-items: center;
+    background: rgba(52,152,219,0.10);
+    color: #3498db;
+    border: 1px solid rgba(52,152,219,0.25);
+    border-radius: 20px;
+    padding: 4px 12px;
+    font-size: 0.75rem;
+    font-weight: 500;
+}
+
+/* ── Footer ──────────────────────────────────────────────────────────────── */
+.receiver-footer {
+    position: fixed;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    height: 36px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 10px;
+    padding: 0 20px;
+    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
+    color: rgba(255, 255, 255, 0.75);
+    font-size: 0.72rem;
+    z-index: 100;
+    flex-shrink: 0;
+}
+
+.receiver-footer a {
+    color: rgba(255, 255, 255, 0.90);
+    text-decoration: none;
+    transition: color 0.15s;
+}
+
+.receiver-footer a:hover {
+    color: #ffffff;
+    text-decoration: underline;
+}
+
+.receiver-footer__sep {
+    opacity: 0.4;
+}

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

@@ -0,0 +1,767 @@
+.envelope-viewer-layout {
+    display: flex;
+    flex-direction: column;
+    height: 100vh;
+    overflow: hidden;
+    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #7e22ce 100%);
+}
+
+.envelope-action-bar {
+    background: rgba(255, 255, 255, 0.95);
+    backdrop-filter: blur(20px);
+    border-bottom: 3px solid rgba(126, 34, 206, 0.3);
+    padding: 1.25rem 2rem;
+    flex-shrink: 0;
+    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
+}
+
+.envelope-action-bar__inner {
+    max-width: 1600px;
+    margin: 0 auto;
+    display: flex;
+    align-items: center;
+    gap: 2rem;
+}
+
+.envelope-logo svg {
+    filter: drop-shadow(0 2px 4px rgba(126, 34, 206, 0.3));
+    color: #7e22ce;
+}
+
+.envelope-title {
+    font-size: 1.125rem;
+    font-weight: 700;
+    color: #1e293b;
+    letter-spacing: -0.025em;
+}
+
+.envelope-key {
+    font-size: 0.8125rem;
+    color: #64748b;
+    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
+    font-weight: 500;
+    margin-top: 0.25rem;
+}
+
+.envelope-content {
+    flex: 1;
+    min-height: 0;
+    padding: 1.5rem;
+    position: relative;
+    overflow: auto;
+}
+
+.pdf-viewer-container {
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 1rem;
+}
+
+.pdf-thumbnails {
+    position: relative;
+    width: 260px;
+    background: rgba(255, 255, 255, 0.98);
+    backdrop-filter: blur(20px);
+    border-radius: 16px 0 0 16px;
+    box-shadow: 
+        0 8px 32px rgba(0, 0, 0, 0.12),
+        0 0 0 1px rgba(126, 34, 206, 0.1);
+    border: 1px solid rgba(126, 34, 206, 0.15);
+    border-right: none;
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+    flex-shrink: 0;
+}
+
+.pdf-thumbnails__content {
+    flex: 1;
+    overflow-y: auto;
+    overflow-x: hidden;
+    padding: 1rem;
+    display: flex;
+    flex-direction: column;
+    gap: 0.75rem;
+}
+
+.pdf-thumbnails__content::-webkit-scrollbar {
+    width: 6px;
+}
+
+.pdf-thumbnails__content::-webkit-scrollbar-track {
+    background: rgba(0, 0, 0, 0.05);
+    border-radius: 3px;
+}
+
+.pdf-thumbnails__content::-webkit-scrollbar-thumb {
+    background: linear-gradient(135deg, #7e22ce 0%, #2a5298 100%);
+    border-radius: 3px;
+}
+
+.pdf-thumbnails__content::-webkit-scrollbar-thumb:hover {
+    background: linear-gradient(135deg, #6b1cb0 0%, #1e3a72 100%);
+}
+
+.pdf-splitter {
+    width: 4px;
+    background: transparent;
+    cursor: col-resize;
+    flex-shrink: 0;
+    position: relative;
+    transition: background 0.2s ease;
+    z-index: 10;
+    user-select: none;
+}
+
+.pdf-splitter::before {
+    content: '';
+    position: absolute;
+    left: -4px;
+    right: -4px;
+    top: 0;
+    bottom: 0;
+    /* Enlarged hitbox for easier grabbing */
+}
+
+.pdf-splitter:hover,
+.pdf-splitter.resizing {
+    background: linear-gradient(90deg, 
+        rgba(126, 34, 206, 0.4) 0%, 
+        rgba(42, 82, 152, 0.4) 100%);
+}
+
+.pdf-splitter:active {
+    background: linear-gradient(90deg, 
+        rgba(126, 34, 206, 0.6) 0%, 
+        rgba(42, 82, 152, 0.6) 100%);
+}
+
+/* Prevent text selection during resize */
+body.resizing {
+    user-select: none;
+    cursor: col-resize !important;
+}
+
+.pdf-thumbnail {
+    cursor: pointer;
+    border-radius: 8px;
+    overflow: hidden;
+    background: white;
+    border: 2px solid transparent;
+    transition: all 0.2s ease;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
+}
+
+.pdf-thumbnail:hover {
+    border-color: rgba(126, 34, 206, 0.3);
+    box-shadow: 0 4px 16px rgba(126, 34, 206, 0.2);
+    transform: translateY(-2px);
+}
+
+.pdf-thumbnail--active {
+    border-color: #7e22ce;
+    box-shadow: 
+        0 4px 16px rgba(126, 34, 206, 0.3),
+        0 0 0 3px rgba(126, 34, 206, 0.1);
+}
+
+.pdf-thumbnail__preview {
+    width: 100%;
+    aspect-ratio: 210 / 297;
+    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    overflow: hidden;
+}
+
+.pdf-thumbnail__canvas {
+    width: 100%;
+    height: 100%;
+    object-fit: contain;
+    object-position: center;
+    image-rendering: -webkit-optimize-contrast;
+    image-rendering: crisp-edges;
+}
+
+.pdf-thumbnail__label {
+    padding: 0.5rem;
+    text-align: center;
+    font-size: 0.75rem;
+    font-weight: 600;
+    color: #64748b;
+    background: rgba(126, 34, 206, 0.03);
+    border-top: 1px solid rgba(126, 34, 206, 0.1);
+}
+
+.pdf-thumbnail--active .pdf-thumbnail__label {
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.1) 0%, rgba(42, 82, 152, 0.1) 100%);
+    color: #7e22ce;
+    font-weight: 700;
+}
+
+.pdf-toolbar__btn--toggle {
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.08) 0%, rgba(42, 82, 152, 0.08) 100%);
+    border-color: rgba(126, 34, 206, 0.25);
+}
+
+.pdf-toolbar__btn--toggle:hover:not(:disabled) {
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.15) 0%, rgba(42, 82, 152, 0.15) 100%);
+    border-color: rgba(126, 34, 206, 0.5);
+}
+
+.pdf-toolbar {
+    background: rgba(255, 255, 255, 0.98);
+    backdrop-filter: blur(20px);
+    border-radius: 12px;
+    padding: 0.75rem 1.5rem;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 1.5rem;
+    box-shadow: 
+        0 4px 16px rgba(0, 0, 0, 0.1),
+        0 0 0 1px rgba(126, 34, 206, 0.1);
+    border: 1px solid rgba(126, 34, 206, 0.15);
+    flex-shrink: 0;
+    width: 95%;
+}
+
+.pdf-toolbar__section {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    flex-shrink: 0;
+}
+
+.pdf-toolbar__zoom-section {
+    gap: 0.75rem;
+    flex: 1;
+    max-width: 400px;
+    min-width: 280px;
+    justify-content: center;
+}
+
+.pdf-toolbar__divider {
+    width: 1px;
+    height: 32px;
+    background: linear-gradient(180deg, transparent 0%, rgba(126, 34, 206, 0.2) 50%, transparent 100%);
+}
+
+.pdf-toolbar__btn {
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.05) 0%, rgba(42, 82, 152, 0.05) 100%);
+    border: 1px solid rgba(126, 34, 206, 0.2);
+    border-radius: 8px;
+    padding: 0.5rem;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    color: #1e293b;
+    min-width: 34px;
+    min-height: 34px;
+}
+
+.pdf-toolbar__btn:hover:not(:disabled) {
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.1) 0%, rgba(42, 82, 152, 0.1) 100%);
+    border-color: rgba(126, 34, 206, 0.4);
+    transform: translateY(-1px);
+    box-shadow: 0 4px 12px rgba(126, 34, 206, 0.2);
+}
+
+.pdf-toolbar__btn:active:not(:disabled) {
+    transform: translateY(0);
+    box-shadow: 0 2px 6px rgba(126, 34, 206, 0.15);
+}
+
+.pdf-toolbar__btn:disabled {
+    opacity: 0.4;
+    cursor: not-allowed;
+    background: rgba(0, 0, 0, 0.02);
+    border-color: rgba(0, 0, 0, 0.1);
+}
+
+.pdf-toolbar__btn--preset {
+    padding: 0.5rem 0.875rem;
+    font-size: 0.813rem;
+    font-weight: 600;
+    color: #475569;
+    min-width: auto;
+    white-space: nowrap;
+}
+
+.pdf-toolbar__btn--preset svg {
+    flex-shrink: 0;
+}
+
+.pdf-toolbar__page-input-group {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    background: white;
+    border: 1px solid rgba(126, 34, 206, 0.2);
+    border-radius: 8px;
+    padding: 0.25rem 0.625rem;
+}
+
+.pdf-toolbar__page-input {
+    width: 48px;
+    border: none;
+    outline: none;
+    text-align: center;
+    font-size: 0.875rem;
+    font-weight: 600;
+    color: #1e293b;
+    background: transparent;
+    -moz-appearance: textfield;
+}
+
+.pdf-toolbar__page-input::-webkit-outer-spin-button,
+.pdf-toolbar__page-input::-webkit-inner-spin-button {
+    -webkit-appearance: none;
+    margin: 0;
+}
+
+.pdf-toolbar__page-total {
+    font-size: 0.875rem;
+    font-weight: 500;
+    color: #64748b;
+}
+
+.pdf-toolbar__zoom-slider-container {
+    position: relative;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 0.25rem;
+}
+
+.pdf-toolbar__zoom-slider {
+    -webkit-appearance: none;
+    width: 100%;
+    min-width: 180px;
+    max-width: 350px;
+    height: 6px;
+    border-radius: 3px;
+    background: linear-gradient(90deg, 
+        rgba(126, 34, 206, 0.1) 0%, 
+        rgba(126, 34, 206, 0.2) 50%, 
+        rgba(126, 34, 206, 0.1) 100%);
+    outline: none;
+    cursor: pointer;
+}
+
+.pdf-toolbar__zoom-slider::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: linear-gradient(135deg, #7e22ce 0%, #2a5298 100%);
+    cursor: pointer;
+    box-shadow: 0 2px 8px rgba(126, 34, 206, 0.3);
+    transition: all 0.2s ease;
+}
+
+.pdf-toolbar__zoom-slider::-webkit-slider-thumb:hover {
+    transform: scale(1.15);
+    box-shadow: 0 4px 12px rgba(126, 34, 206, 0.4);
+}
+
+.pdf-toolbar__zoom-slider::-moz-range-thumb {
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: linear-gradient(135deg, #7e22ce 0%, #2a5298 100%);
+    cursor: pointer;
+    border: none;
+    box-shadow: 0 2px 8px rgba(126, 34, 206, 0.3);
+    transition: all 0.2s ease;
+}
+
+.pdf-toolbar__zoom-slider::-moz-range-thumb:hover {
+    transform: scale(1.15);
+    box-shadow: 0 4px 12px rgba(126, 34, 206, 0.4);
+}
+
+.pdf-toolbar__zoom-label {
+    font-size: 0.75rem;
+    font-weight: 700;
+    color: #7e22ce;
+    letter-spacing: 0.025em;
+    min-width: 45px;
+    text-align: center;
+}
+
+/* Signature Navigation Styles */
+.pdf-toolbar__signature-nav {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.05) 0%, rgba(42, 82, 152, 0.05) 100%);
+    border: 1px solid rgba(126, 34, 206, 0.2);
+    border-radius: 10px;
+    padding: 0.25rem 0.5rem;
+    flex-shrink: 0;
+}
+
+.pdf-toolbar__btn--signature-nav {
+    min-width: 30px;
+    min-height: 30px;
+    padding: 0.25rem;
+    background: white;
+    border: 1px solid rgba(126, 34, 206, 0.25);
+}
+
+.pdf-toolbar__btn--signature-nav:hover:not(:disabled) {
+    background: linear-gradient(135deg, #7e22ce 0%, #2a5298 100%);
+    border-color: transparent;
+}
+
+.pdf-toolbar__btn--signature-nav:hover:not(:disabled) svg {
+    color: white;
+}
+
+.pdf-toolbar__signature-counter {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    padding: 0 0.375rem;
+}
+
+.pdf-toolbar__signature-counter svg {
+    color: #7e22ce;
+    flex-shrink: 0;
+}
+
+.pdf-toolbar__signature-counter-text {
+    font-size: 0.8125rem;
+    font-weight: 600;
+    color: #1e293b;
+    white-space: nowrap;
+}
+
+.pdf-toolbar__signature-badge {
+    font-size: 0.625rem;
+    font-weight: 700;
+    padding: 0.1875rem 0.5rem;
+    border-radius: 5px;
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.1) 0%, rgba(42, 82, 152, 0.1) 100%);
+    color: #7e22ce;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    white-space: nowrap;
+}
+
+.pdf-toolbar__signature-badge--complete {
+    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(5, 150, 105, 0.1) 100%);
+    color: #059669;
+}
+
+/* Reset Button Styles */
+.pdf-toolbar__btn--reset {
+    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08) 0%, rgba(220, 38, 38, 0.08) 100%);
+    border-color: rgba(239, 68, 68, 0.3);
+    color: #dc2626;
+}
+
+.pdf-toolbar__btn--reset:hover:not(:disabled) {
+    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
+    border-color: transparent;
+    color: white;
+    transform: translateY(-1px);
+    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
+}
+
+.pdf-toolbar__btn--reset svg {
+    transition: color 0.2s ease;
+}
+
+.pdf-toolbar__btn--reset:hover:not(:disabled) svg {
+    color: white;
+}
+
+/* Success Button Styles (Signature Created) */
+.pdf-toolbar__btn--success {
+    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(5, 150, 105, 0.1) 100%);
+    border-color: rgba(16, 185, 129, 0.3);
+    color: #059669;
+}
+
+.pdf-toolbar__btn--success:hover:not(:disabled) {
+    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
+    border-color: transparent;
+    color: white;
+    transform: translateY(-1px);
+    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
+}
+
+.pdf-toolbar__btn--success svg {
+    transition: color 0.2s ease;
+}
+
+.pdf-toolbar__btn--success:hover:not(:disabled) svg {
+    color: white;
+}
+
+/* Signature Change Button */
+.pdf-toolbar__btn--signature-change {
+    display: flex;
+    align-items: center;
+    gap: 0.375rem;
+    min-width: auto;
+    padding: 0.5rem 0.75rem;
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.05) 0%, rgba(42, 82, 152, 0.05) 100%);
+    border: 1px solid rgba(126, 34, 206, 0.2);
+    color: #7e22ce;
+}
+
+.pdf-toolbar__btn--signature-change:hover:not(:disabled) {
+    background: linear-gradient(135deg, rgba(126, 34, 206, 0.1) 0%, rgba(42, 82, 152, 0.1) 100%);
+    border-color: rgba(126, 34, 206, 0.4);
+}
+
+.pdf-toolbar__btn--signature-change-active {
+    background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(5, 150, 105, 0.08) 100%);
+    border-color: rgba(16, 185, 129, 0.25);
+    color: #059669;
+}
+
+.pdf-toolbar__btn--signature-change-active:hover:not(:disabled) {
+    background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(5, 150, 105, 0.12) 100%);
+    border-color: rgba(16, 185, 129, 0.35);
+}
+
+.pdf-toolbar__btn--signature-change:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+}
+
+.pdf-toolbar__btn-text {
+    font-size: 0.813rem;
+    font-weight: 600;
+    white-space: nowrap;
+}
+
+.pdf-frame {
+    background: white;
+    border-radius: 16px;
+    box-shadow: 
+        0 25px 50px -12px rgba(0, 0, 0, 0.25),
+        0 0 0 1px rgba(255, 255, 255, 0.1);
+    overflow: hidden;
+    position: relative;
+    flex: 1;
+    width: 95%;
+    display: flex;
+    flex-direction: row;
+    align-items: stretch;
+}
+
+.pdf-frame::before {
+    content: '';
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    height: 4px;
+    background: linear-gradient(90deg, #7e22ce 0%, #2a5298 100%);
+    z-index: 1;
+    border-radius: 16px 16px 0 0;
+}
+
+.pdf-canvas-wrapper {
+    flex: 1;
+    overflow: auto;
+    padding: 2rem;
+    text-align: center;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: flex-start;
+}
+
+.pdf-page-container {
+    position: relative;
+    display: inline-block;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+}
+
+.pdf-canvas {
+    display: block;
+    vertical-align: top;
+    image-rendering: -webkit-optimize-contrast;
+    image-rendering: crisp-edges;
+    transition: opacity 0.15s ease-out;
+}
+
+.pdf-canvas.rendering {
+    opacity: 0;
+}
+
+.pdf-text-layer {
+    position: absolute;
+    left: 0;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    overflow: hidden;
+    opacity: 1;
+    line-height: 1.0;
+    pointer-events: auto;
+}
+
+.pdf-text-layer > span {
+    color: transparent;
+    position: absolute;
+    white-space: pre;
+    cursor: text;
+    transform-origin: 0% 0%;
+}
+
+.pdf-text-layer ::selection {
+    background: rgba(126, 34, 206, 0.3);
+}
+
+.pdf-text-layer ::-moz-selection {
+    background: rgba(126, 34, 206, 0.3);
+}
+
+.pdf-signature-layer {
+    position: absolute;
+    left: 0;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    overflow: visible;
+    pointer-events: none;
+    z-index: 20;
+}
+
+.pdf-signature-layer .signature-button {
+    pointer-events: auto;
+}
+
+.signature-button {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
+}
+
+.signature-button:focus {
+    outline: 2px solid #7e22ce;
+    outline-offset: 2px;
+}
+
+.signature-button:active {
+    transform: scale(0.98);
+}
+
+.error-container {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    padding: 2rem;
+}
+
+.alert {
+    border-radius: 12px;
+    border: none;
+    padding: 2rem;
+    max-width: 600px;
+}
+
+.alert-danger {
+    background: linear-gradient(135deg, #fff1f2 0%, #ffe4e6 100%);
+    color: #be123c;
+    border-left: 4px solid #e11d48;
+}
+
+.alert-warning {
+    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
+    color: #92400e;
+    border-left: 4px solid #f59e0b;
+}
+
+.spinner-border {
+    border-width: 0.35rem;
+}
+
+@media (max-width: 768px) {
+.envelope-content {
+    padding: 0.75rem;
+}
+
+.pdf-thumbnails {
+    width: 180px;
+    border-radius: 0 0 0 16px;
+}
+
+.pdf-thumbnails__content {
+    padding: 0.75rem;
+    gap: 0.5rem;
+}
+
+.pdf-toolbar {
+    flex-wrap: wrap;
+    padding: 0.625rem 1rem;
+    gap: 0.75rem;
+    width: 98%;
+    justify-content: center;
+}
+
+.pdf-toolbar__divider {
+    display: none;
+}
+
+.pdf-toolbar__zoom-section {
+    width: 100%;
+    max-width: 100%;
+}
+
+.pdf-toolbar__zoom-slider {
+    min-width: 150px;
+}
+
+.pdf-toolbar__btn--preset {
+    padding: 0.425rem 0.75rem;
+    font-size: 0.75rem;
+}
+
+.pdf-frame {
+    border-radius: 12px;
+    width: 98%;
+    flex-direction: column;
+}
+
+.pdf-canvas-wrapper {
+    padding: 1rem;
+}
+
+    .envelope-action-bar {
+        padding: 1rem 1.25rem;
+    }
+
+    .envelope-action-bar__inner {
+        flex-wrap: wrap;
+    }
+
+    .envelope-title {
+        font-size: 1rem;
+    }
+
+    .envelope-key {
+        font-size: 0.75rem;
+    }
+
+    .envelope-logo svg {
+        width: 20px;
+        height: 20px;
+    }
+
+    .alert {
+        padding: 1.5rem;
+    }
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/open-iconic/FONT-LICENSE

@@ -0,0 +1,86 @@
+SIL OPEN FONT LICENSE Version 1.1
+
+Copyright (c) 2014 Waybury
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/open-iconic/ICON-LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Waybury
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/open-iconic/README.md

@@ -0,0 +1,114 @@
+[Open Iconic v1.1.1](https://github.com/iconic/open-iconic)
+===========
+
+### Open Iconic is the open source sibling of [Iconic](https://github.com/iconic/open-iconic). It is a hyper-legible collection of 223 icons with a tiny footprint—ready to use with Bootstrap and Foundation. [View the collection](https://github.com/iconic/open-iconic)
+
+
+
+## What's in Open Iconic?
+
+* 223 icons designed to be legible down to 8 pixels
+* Super-light SVG files - 61.8 for the entire set 
+* SVG sprite—the modern replacement for icon fonts
+* Webfont (EOT, OTF, SVG, TTF, WOFF), PNG and WebP formats
+* Webfont stylesheets (including versions for Bootstrap and Foundation) in CSS, LESS, SCSS and Stylus formats
+* PNG and WebP raster images in 8px, 16px, 24px, 32px, 48px and 64px.
+
+
+## Getting Started
+
+#### For code samples and everything else you need to get started with Open Iconic, check out our [Icons](https://github.com/iconic/open-iconic) and [Reference](https://github.com/iconic/open-iconic) sections.
+
+### General Usage
+
+#### Using Open Iconic's SVGs
+
+We like SVGs and we think they're the way to display icons on the web. Since Open Iconic are just basic SVGs, we suggest you display them like you would any other image (don't forget the `alt` attribute).
+
+```
+<img src="/open-iconic/svg/icon-name.svg" alt="icon name">
+```
+
+#### Using Open Iconic's SVG Sprite
+
+Open Iconic also comes in a SVG sprite which allows you to display all the icons in the set with a single request. It's like an icon font, without being a hack.
+
+Adding an icon from an SVG sprite is a little different than what you're used to, but it's still a piece of cake. *Tip: To make your icons easily style able, we suggest adding a general class to the* `<svg>` *tag and a unique class name for each different icon in the* `<use>` *tag.*  
+
+```
+<svg class="icon">
+  <use xlink:href="open-iconic.svg#account-login" class="icon-account-login"></use>
+</svg>
+```
+
+Sizing icons only needs basic CSS. All the icons are in a square format, so just set the `<svg>` tag with equal width and height dimensions.
+
+```
+.icon {
+  width: 16px;
+  height: 16px;
+}
+```
+
+Coloring icons is even easier. All you need to do is set the `fill` rule on the `<use>` tag.
+
+```
+.icon-account-login {
+  fill: #f00;
+}
+```
+
+To learn more about SVG Sprites, read [Chris Coyier's guide](http://css-tricks.com/svg-sprites-use-better-icon-fonts/).
+
+#### Using Open Iconic's Icon Font...
+
+
+##### …with Bootstrap
+
+You can find our Bootstrap stylesheets in `font/css/open-iconic-bootstrap.{css, less, scss, styl}`
+
+
+```
+<link href="/open-iconic/font/css/open-iconic-bootstrap.css" rel="stylesheet">
+```
+
+
+```
+<span class="oi oi-icon-name" title="icon name" aria-hidden="true"></span>
+```
+
+##### …with Foundation
+
+You can find our Foundation stylesheets in `font/css/open-iconic-foundation.{css, less, scss, styl}`
+
+```
+<link href="/open-iconic/font/css/open-iconic-foundation.css" rel="stylesheet">
+```
+
+
+```
+<span class="fi-icon-name" title="icon name" aria-hidden="true"></span>
+```
+
+##### …on its own
+
+You can find our default stylesheets in `font/css/open-iconic.{css, less, scss, styl}`
+
+```
+<link href="/open-iconic/font/css/open-iconic.css" rel="stylesheet">
+```
+
+```
+<span class="oi" data-glyph="icon-name" title="icon name" aria-hidden="true"></span>
+```
+
+
+## License
+
+### Icons
+
+All code (including SVG markup) is under the [MIT License](http://opensource.org/licenses/MIT).
+
+### Fonts
+
+All fonts are under the [SIL Licensed](http://scripts.sil.org/cms/scripts/page.php?item_id=OFL_web).

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/open-iconic/font/fonts/open-iconic.svg

@@ -0,0 +1,543 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<!--
+2014-7-1: Created.
+-->
+<svg xmlns="http://www.w3.org/2000/svg">
+<metadata>
+Created by FontForge 20120731 at Tue Jul  1 20:39:22 2014
+ By P.J. Onori
+Created by P.J. Onori with FontForge 2.0 (http://fontforge.sf.net)
+</metadata>
+<defs>
+<font id="open-iconic" horiz-adv-x="800" >
+  <font-face 
+    font-family="Icons"
+    font-weight="400"
+    font-stretch="normal"
+    units-per-em="800"
+    panose-1="2 0 5 3 0 0 0 0 0 0"
+    ascent="800"
+    descent="0"
+    bbox="-0.5 -101 802 800.126"
+    underline-thickness="50"
+    underline-position="-100"
+    unicode-range="U+E000-E0DE"
+  />
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EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/privacy-policy.css

@@ -0,0 +1,41 @@
+body {
+    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+    line-height: 1.6;
+    margin: 1.25rem;
+    background-color: #f4f4f4;
+}
+
+header {
+    text-align: center;
+    margin: 0rem 10rem 3rem 10rem;
+    box-shadow: 0 .25rem .5rem rgba(0, 0, 0, 0.1);
+}
+
+h1 {
+    color: #333;
+}
+
+h2 {
+    color: #0056b3;
+}
+
+section {
+    background-color: white;
+    padding: 1.25rem;
+    border-radius: 0.5rem;
+    box-shadow: 0 .25rem .5rem rgba(0, 0, 0, 0.1);
+    margin: 0rem 10rem 3rem 10rem
+}
+
+ul {
+    list-style: disc inside;
+}
+
+a {
+    color: #0056b3;
+    text-decoration: none;
+}
+
+a:hover {
+    text-decoration: underline;
+}

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/css/privacy-policy.min.css

@@ -0,0 +1 @@
+body{font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,'Open Sans','Helvetica Neue',sans-serif;line-height:1.6;margin:1.25rem;background-color:#f4f4f4}header{text-align:center;margin:0 10rem 3rem 10rem;box-shadow:0 .25rem .5rem rgba(0,0,0,.1)}h1{color:#333}h2{color:#0056b3}section{background-color:#fff;padding:1.25rem;border-radius:.5rem;box-shadow:0 .25rem .5rem rgba(0,0,0,.1);margin:0 10rem 3rem 10rem}ul{list-style:disc inside}a{color:#0056b3;text-decoration:none}a:hover{text-decoration:underline}

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

@@ -0,0 +1,353 @@
+window.receiverSignature = (() => {
+
+    // ?? State ???????????????????????????????????????????????????????????????
+    const pads            = new Map();
+    const typedSignatures = new Map();
+    const imageSignatures = new Map();
+    const overlayButtons  = new Map(); // annotationId -> { btn, signed }
+    let   _dotNetRef      = null;
+
+    // DevExpress Blazor Report Viewer selectors (confirmed via debugDumpViewerDom)
+    const PAGE_IMG_SEL         = '.dxbrv-report-preview-content-img';
+    const SCROLL_CONTAINER_SEL = '.dxbrv-surface-wrapper';
+    const VIEWER_WRAPPER_SEL   = '.receiver-viewer-wrapper';
+
+    // DX report coordinate space (1/100 inch, A4)
+    const DX_PAGE_WIDTH  = 827.0;
+    const DX_PAGE_HEIGHT = 1169.0;
+
+    // Signature field size in DX units
+    const SIG_WIDTH_DX  = 230.0;
+    const SIG_HEIGHT_DX = 154.0;
+
+    // ?? Annotation Checkboxes ????????????????????????????????????????????????
+
+    // Active install context — holds everything needed to reposition on resize/scroll
+    let _installCtx = null;
+
+    function installAnnotationCheckboxes(annotations, checkedIds, dotNetRef) {
+        _dotNetRef = dotNetRef;
+
+        // Tear down previous install completely
+        _teardownCheckboxes();
+
+        if (!annotations || annotations.length === 0) return;
+
+        const ctx = {
+            annotations,
+            checkedIds: new Set(Array.isArray(checkedIds) ? checkedIds : []),
+            scrollEl:   null,
+            pageEls:    [],
+            resizeObs:  null,
+            onScroll:   null,
+            onResize:   null,
+            resizeTimer: null,
+        };
+        _installCtx = ctx;
+
+        _waitForCheckboxPages(ctx);
+    }
+
+    function _teardownCheckboxes() {
+        document.querySelectorAll('.annot-sig-cb-wrapper').forEach(el => el.remove());
+        overlayButtons.clear();
+
+        if (!_installCtx) return;
+        const ctx = _installCtx;
+
+        if (ctx.resizeObs)  { ctx.resizeObs.disconnect(); ctx.resizeObs = null; }
+        if (ctx.scrollEl && ctx.onScroll)  ctx.scrollEl.removeEventListener('scroll', ctx.onScroll);
+        if (ctx.onResize)   window.removeEventListener('resize', ctx.onResize);
+        if (ctx.resizeTimer) clearTimeout(ctx.resizeTimer);
+
+        _installCtx = null;
+    }
+
+    function _waitForCheckboxPages(ctx) {
+        const wrapper = document.querySelector(VIEWER_WRAPPER_SEL);
+        if (!wrapper) return;
+
+        if (!_tryInstallCheckboxes(ctx)) {
+            const observer = new MutationObserver(() => {
+                if (_tryInstallCheckboxes(ctx)) observer.disconnect();
+            });
+            observer.observe(wrapper, { childList: true, subtree: true });
+            setTimeout(() => observer.disconnect(), 15000);
+        }
+    }
+
+    function _tryInstallCheckboxes(ctx) {
+        const scrollEl = document.querySelector(SCROLL_CONTAINER_SEL);
+        if (!scrollEl) return false;
+
+        const pageEls = Array.from(document.querySelectorAll(PAGE_IMG_SEL));
+        if (pageEls.length === 0) return false;
+
+        if (getComputedStyle(scrollEl).position === 'static')
+            scrollEl.style.position = 'relative';
+
+        ctx.scrollEl = scrollEl;
+        ctx.pageEls  = pageEls;
+
+        // Initial render
+        _renderAllCheckboxes(ctx);
+
+        // ResizeObserver — watches every page image for size changes (zoom in/out)
+        const ro = new ResizeObserver(() => _repositionAll(ctx));
+        pageEls.forEach(el => ro.observe(el));
+        ctx.resizeObs = ro;
+
+        // Scroll — reposition when user scrolls the viewer
+        ctx.onScroll = () => _repositionAll(ctx);
+        scrollEl.addEventListener('scroll', ctx.onScroll, { passive: true });
+
+        // Window resize — debounced 60 ms
+        ctx.onResize = () => {
+            if (ctx.resizeTimer) clearTimeout(ctx.resizeTimer);
+            ctx.resizeTimer = setTimeout(() => _repositionAll(ctx), 60);
+        };
+        window.addEventListener('resize', ctx.onResize, { passive: true });
+
+        return true;
+    }
+
+    function _repositionAll(ctx) {
+        if (!ctx || !ctx.scrollEl) return;
+
+        const scrollEl = ctx.scrollEl;
+        const pageEls  = Array.from(document.querySelectorAll(PAGE_IMG_SEL)); // re-query in case DOM changed
+        if (pageEls.length === 0) return;
+
+        const scrollRect = scrollEl.getBoundingClientRect();
+
+        ctx.annotations.forEach(ann => {
+            const wrapper = document.querySelector(`.annot-sig-cb-wrapper[data-annot-id="${ann.id}"]`);
+            if (!wrapper) return;
+
+            const pageEl = pageEls[(ann.page || 1) - 1] ?? pageEls[pageEls.length - 1];
+            if (!pageEl) return;
+
+            const pageRect = pageEl.getBoundingClientRect();
+            if (pageRect.width === 0 || pageRect.height === 0) return;
+
+            const scaleX = pageRect.width  / DX_PAGE_WIDTH;
+            const scaleY = pageRect.height / DX_PAGE_HEIGHT;
+
+            const absLeft = pageRect.left - scrollRect.left + scrollEl.scrollLeft + (ann.x || 0) * scaleX;
+            const absTop  = pageRect.top  - scrollRect.top  + scrollEl.scrollTop  + (ann.y || 0) * scaleY;
+            const boxW    = SIG_WIDTH_DX  * scaleX;
+            const boxH    = SIG_HEIGHT_DX * scaleY;
+
+            wrapper.style.left   = Math.round(absLeft) + 'px';
+            wrapper.style.top    = Math.round(absTop)  + 'px';
+            wrapper.style.width  = Math.round(boxW)    + 'px';
+            wrapper.style.height = Math.round(boxH)    + 'px';
+        });
+    }
+
+    function _renderAllCheckboxes(ctx) {
+        const scrollEl  = ctx.scrollEl;
+        const pageEls   = ctx.pageEls;
+        const scrollRect = scrollEl.getBoundingClientRect();
+
+        ctx.annotations.forEach(ann => {
+            const pageEl = pageEls[(ann.page || 1) - 1] ?? pageEls[pageEls.length - 1];
+            if (!pageEl) return;
+
+            const pageRect = pageEl.getBoundingClientRect();
+            if (pageRect.width === 0 || pageRect.height === 0) return;
+
+            const scaleX = pageRect.width  / DX_PAGE_WIDTH;
+            const scaleY = pageRect.height / DX_PAGE_HEIGHT;
+
+            const absLeft = pageRect.left - scrollRect.left + scrollEl.scrollLeft + (ann.x || 0) * scaleX;
+            const absTop  = pageRect.top  - scrollRect.top  + scrollEl.scrollTop  + (ann.y || 0) * scaleY;
+            const boxW    = SIG_WIDTH_DX  * scaleX;
+            const boxH    = SIG_HEIGHT_DX * scaleY;
+
+            const isChecked = ctx.checkedIds.has(ann.id);
+            _createCheckboxOverlay(ann.id, scrollEl, absLeft, absTop, boxW, boxH, isChecked);
+        });
+    }
+
+    function _createCheckboxOverlay(annotationId, container, left, top, width, height, isChecked) {
+        const wrapper = document.createElement('div');
+        wrapper.className = 'annot-sig-cb-wrapper' + (isChecked ? ' annot-sig-cb-wrapper--checked' : '');
+        wrapper.setAttribute('data-annot-id', String(annotationId));
+
+        Object.assign(wrapper.style, {
+            position:   'absolute',
+            left:       Math.round(left)   + 'px',
+            top:        Math.round(top)    + 'px',
+            width:      Math.round(width)  + 'px',
+            height:     Math.round(height) + 'px',
+            zIndex:     '9999',
+            cursor:     'pointer',
+            boxSizing:  'border-box',
+        });
+
+        const cb = document.createElement('input');
+        cb.type = 'checkbox';
+        cb.checked = isChecked;
+        cb.className = 'annot-sig-cb';
+        cb.setAttribute('aria-label', 'Unterschriftsfeld bestaetigen');
+
+        const label = document.createElement('span');
+        label.className = 'annot-sig-cb__label';
+        label.textContent = isChecked ? '\u2713 Bestaetigt' : '\u270e Hier unterschreiben';
+
+        wrapper.appendChild(cb);
+        wrapper.appendChild(label);
+
+        wrapper.addEventListener('click', (e) => {
+            if (e.target !== cb) cb.checked = !cb.checked;
+            const checked = cb.checked;
+            wrapper.classList.toggle('annot-sig-cb-wrapper--checked', checked);
+            label.textContent = checked ? '\u2713 Bestaetigt' : '\u270e Hier unterschreiben';
+            if (_installCtx) {
+                if (checked) _installCtx.checkedIds.add(annotationId);
+                else         _installCtx.checkedIds.delete(annotationId);
+            }
+            if (_dotNetRef)
+                _dotNetRef.invokeMethodAsync('OnAnnotationToggled', annotationId, checked);
+        });
+
+        container.appendChild(wrapper);
+        overlayButtons.set(annotationId, { btn: wrapper, signed: isChecked });
+    }
+
+    // ?? Signature Pad ???????????????????????????????????????????????????????
+
+    function _pos(canvas, event) {
+        const r = canvas.getBoundingClientRect();
+        const s = (event.touches && event.touches.length) ? event.touches[0] : event;
+        return { x: (s.clientX - r.left) * (canvas.width / r.width), y: (s.clientY - r.top) * (canvas.height / r.height) };
+    }
+
+    function _clear(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 ctx = canvas.getContext('2d');
+        ctx.lineWidth = 2.5; ctx.lineCap = 'round'; ctx.lineJoin = 'round'; ctx.strokeStyle = '#111';
+        const state = { drawing: false, hasSignature: false };
+        pads.set(canvasId, state);
+        const start = e => { e.preventDefault(); const p = _pos(canvas, e); state.drawing = true; ctx.beginPath(); ctx.moveTo(p.x, p.y); };
+        const move  = e => { if (!state.drawing) return; e.preventDefault(); const p = _pos(canvas, e); ctx.lineTo(p.x, p.y); ctx.stroke(); state.hasSignature = true; };
+        const end   = e => { if (!state.drawing) return; e.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[0];
+            if (!file || !file.type.startsWith('image/')) { _clear(canvas); state.hasSignature = false; return; }
+            const reader = new FileReader();
+            reader.onload = () => {
+                const img = new Image();
+                img.onload = () => {
+                    const ctx = canvas.getContext('2d'); _clear(canvas);
+                    const p = 10, mw = canvas.width - p * 2, mh = canvas.height - p * 2;
+                    const s = Math.min(mw / img.width, mh / img.height, 1);
+                    ctx.drawImage(img, (canvas.width - img.width * s) / 2, (canvas.height - img.height * s) / 2, img.width * s, img.height * s);
+                    state.hasSignature = true;
+                };
+                img.src = reader.result;
+            };
+            reader.readAsDataURL(file);
+        });
+    }
+
+    function clear(canvasId) {
+        const c = document.getElementById(canvasId); const s = pads.get(canvasId);
+        if (c && s) { _clear(c); s.hasSignature = false; }
+    }
+
+    function clearTyped(canvasId) {
+        const c = document.getElementById(canvasId); const s = typedSignatures.get(canvasId);
+        if (c && s) { _clear(c); s.hasSignature = false; }
+    }
+
+    function clearImage(inputId, canvasId) {
+        const inp = document.getElementById(inputId); const c = document.getElementById(canvasId); const s = imageSignatures.get(canvasId);
+        if (c && s) { if (inp) inp.value = ''; _clear(c); s.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(); _clear(canvas);
+        if (!value) { state.hasSignature = false; return; }
+        const ctx = canvas.getContext('2d'); let fs = 54;
+        do { ctx.font = 'italic ' + fs + 'px ' + (fontFamily || 'cursive'); fs -= 2; }
+        while (ctx.measureText(value).width > canvas.width - 30 && fs > 24);
+        ctx.fillStyle = '#111'; ctx.textBaseline = 'middle'; ctx.textAlign = 'center';
+        ctx.fillText(value, canvas.width / 2, canvas.height / 2);
+        state.hasSignature = true;
+    }
+
+    function startTyped(elementId, text, typeSpeed) {
+        if (typeof Typed === 'undefined') return;
+        new Typed('#' + elementId, {
+            strings: [text],
+            typeSpeed: typeSpeed || 15,
+            showCursor: false
+        });
+    }
+
+    function getDataUrl(id)      { const c = document.getElementById(id); const s = pads.get(id);            return (c && s && s.hasSignature) ? c.toDataURL('image/png') : null; }
+    function getTypedDataUrl(id) { const c = document.getElementById(id); const s = typedSignatures.get(id); return (c && s && s.hasSignature) ? c.toDataURL('image/png') : null; }
+    function getImageDataUrl(id) { const c = document.getElementById(id); const s = imageSignatures.get(id); return (c && s && s.hasSignature) ? c.toDataURL('image/png') : null; }
+
+    function loadExistingSignature(canvasId, dataUrl) {
+        const canvas = document.getElementById(canvasId);
+        const state = pads.get(canvasId);
+        if (!canvas || !state || !dataUrl) return;
+
+        const ctx = canvas.getContext('2d');
+        const img = new Image();
+        
+        img.onload = () => {
+            _clear(canvas);
+            ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
+            state.hasSignature = true;
+        };
+        
+        img.src = dataUrl;
+    }
+
+    // ?? Public API ??????????????????????????????????????????????????????????
+    return {
+        startTyped:                  startTyped,
+        installAnnotationCheckboxes: installAnnotationCheckboxes,
+        initialize:                  initialize,
+        initializeTyped:             initializeTyped,
+        initializeImage:             initializeImage,
+        clear:                       clear,
+        clearTyped:                  clearTyped,
+        clearImage:                  clearImage,
+        renderTypedSignature:        renderTypedSignature,
+        getDataUrl:                  getDataUrl,
+        getTypedDataUrl:             getTypedDataUrl,
+        getImageDataUrl:             getImageDataUrl,
+        loadExistingSignature:       loadExistingSignature
+    };
+})();
+

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/wwwroot/js/typed.umd.js

@@ -0,0 +1,3 @@
+!function(t,s){"object"==typeof exports&&"undefined"!=typeof module?module.exports=s():"function"==typeof define&&define.amd?define(s):(t||self).Typed=s()}(this,function(){function t(){return t=Object.assign?Object.assign.bind():function(t){for(var s=1;s<arguments.length;s++){var e=arguments[s];for(var n in e)Object.prototype.hasOwnProperty.call(e,n)&&(t[n]=e[n])}return t},t.apply(this,arguments)}var s={strings:["These are the default values...","You know what you should do?","Use your own!","Have a great day!"],stringsElement:null,typeSpeed:0,startDelay:0,backSpeed:0,smartBackspace:!0,shuffle:!1,backDelay:700,fadeOut:!1,fadeOutClass:"typed-fade-out",fadeOutDelay:500,loop:!1,loopCount:Infinity,showCursor:!0,cursorChar:"|",autoInsertCss:!0,attr:null,bindInputFocusEvents:!1,contentType:"html",onBegin:function(t){},onComplete:function(t){},preStringTyped:function(t,s){},onStringTyped:function(t,s){},onLastStringBackspaced:function(t){},onTypingPaused:function(t,s){},onTypingResumed:function(t,s){},onReset:function(t){},onStop:function(t,s){},onStart:function(t,s){},onDestroy:function(t){}},e=new(/*#__PURE__*/function(){function e(){}var n=e.prototype;return n.load=function(e,n,i){if(e.el="string"==typeof i?document.querySelector(i):i,e.options=t({},s,n),e.isInput="input"===e.el.tagName.toLowerCase(),e.attr=e.options.attr,e.bindInputFocusEvents=e.options.bindInputFocusEvents,e.showCursor=!e.isInput&&e.options.showCursor,e.cursorChar=e.options.cursorChar,e.cursorBlinking=!0,e.elContent=e.attr?e.el.getAttribute(e.attr):e.el.textContent,e.contentType=e.options.contentType,e.typeSpeed=e.options.typeSpeed,e.startDelay=e.options.startDelay,e.backSpeed=e.options.backSpeed,e.smartBackspace=e.options.smartBackspace,e.backDelay=e.options.backDelay,e.fadeOut=e.options.fadeOut,e.fadeOutClass=e.options.fadeOutClass,e.fadeOutDelay=e.options.fadeOutDelay,e.isPaused=!1,e.strings=e.options.strings.map(function(t){return t.trim()}),e.stringsElement="string"==typeof e.options.stringsElement?document.querySelector(e.options.stringsElement):e.options.stringsElement,e.stringsElement){e.strings=[],e.stringsElement.style.cssText="clip: rect(0 0 0 0);clip-path:inset(50%);height:1px;overflow:hidden;position:absolute;white-space:nowrap;width:1px;";var r=Array.prototype.slice.apply(e.stringsElement.children),o=r.length;if(o)for(var a=0;a<o;a+=1)e.strings.push(r[a].innerHTML.trim())}for(var u in e.strPos=0,e.currentElContent=this.getCurrentElContent(e),e.currentElContent&&e.currentElContent.length>0&&(e.strPos=e.currentElContent.length-1,e.strings.unshift(e.currentElContent)),e.sequence=[],e.strings)e.sequence[u]=u;e.arrayPos=0,e.stopNum=0,e.loop=e.options.loop,e.loopCount=e.options.loopCount,e.curLoop=0,e.shuffle=e.options.shuffle,e.pause={status:!1,typewrite:!0,curString:"",curStrPos:0},e.typingComplete=!1,e.autoInsertCss=e.options.autoInsertCss,e.autoInsertCss&&(this.appendCursorAnimationCss(e),this.appendFadeOutAnimationCss(e))},n.getCurrentElContent=function(t){return t.attr?t.el.getAttribute(t.attr):t.isInput?t.el.value:"html"===t.contentType?t.el.innerHTML:t.el.textContent},n.appendCursorAnimationCss=function(t){var s="data-typed-js-cursor-css";if(t.showCursor&&!document.querySelector("["+s+"]")){var e=document.createElement("style");e.setAttribute(s,"true"),e.innerHTML="\n        .typed-cursor{\n          opacity: 1;\n        }\n        .typed-cursor.typed-cursor--blink{\n          animation: typedjsBlink 0.7s infinite;\n          -webkit-animation: typedjsBlink 0.7s infinite;\n                  animation: typedjsBlink 0.7s infinite;\n        }\n        @keyframes typedjsBlink{\n          50% { opacity: 0.0; }\n        }\n        @-webkit-keyframes typedjsBlink{\n          0% { opacity: 1; }\n          50% { opacity: 0.0; }\n          100% { opacity: 1; }\n        }\n      ",document.body.appendChild(e)}},n.appendFadeOutAnimationCss=function(t){var s="data-typed-fadeout-js-css";if(t.fadeOut&&!document.querySelector("["+s+"]")){var e=document.createElement("style");e.setAttribute(s,"true"),e.innerHTML="\n        .typed-fade-out{\n          opacity: 0;\n          transition: opacity .25s;\n        }\n        .typed-cursor.typed-cursor--blink.typed-fade-out{\n          -webkit-animation: 0;\n          animation: 0;\n        }\n      ",document.body.appendChild(e)}},e}()),n=new(/*#__PURE__*/function(){function t(){}var s=t.prototype;return s.typeHtmlChars=function(t,s,e){if("html"!==e.contentType)return s;var n=t.substring(s).charAt(0);if("<"===n||"&"===n){var i;for(i="<"===n?">":";";t.substring(s+1).charAt(0)!==i&&!(1+ ++s>t.length););s++}return s},s.backSpaceHtmlChars=function(t,s,e){if("html"!==e.contentType)return s;var n=t.substring(s).charAt(0);if(">"===n||";"===n){var i;for(i=">"===n?"<":"&";t.substring(s-1).charAt(0)!==i&&!(--s<0););s--}return s},t}());/*#__PURE__*/
+return function(){function t(t,s){e.load(this,s,t),this.begin()}var s=t.prototype;return s.toggle=function(){this.pause.status?this.start():this.stop()},s.stop=function(){this.typingComplete||this.pause.status||(this.toggleBlinking(!0),this.pause.status=!0,this.options.onStop(this.arrayPos,this))},s.start=function(){this.typingComplete||this.pause.status&&(this.pause.status=!1,this.pause.typewrite?this.typewrite(this.pause.curString,this.pause.curStrPos):this.backspace(this.pause.curString,this.pause.curStrPos),this.options.onStart(this.arrayPos,this))},s.destroy=function(){this.reset(!1),this.options.onDestroy(this)},s.reset=function(t){void 0===t&&(t=!0),clearInterval(this.timeout),this.replaceText(""),this.cursor&&this.cursor.parentNode&&(this.cursor.parentNode.removeChild(this.cursor),this.cursor=null),this.strPos=0,this.arrayPos=0,this.curLoop=0,t&&(this.insertCursor(),this.options.onReset(this),this.begin())},s.begin=function(){var t=this;this.options.onBegin(this),this.typingComplete=!1,this.shuffleStringsIfNeeded(this),this.insertCursor(),this.bindInputFocusEvents&&this.bindFocusEvents(),this.timeout=setTimeout(function(){0===t.strPos?t.typewrite(t.strings[t.sequence[t.arrayPos]],t.strPos):t.backspace(t.strings[t.sequence[t.arrayPos]],t.strPos)},this.startDelay)},s.typewrite=function(t,s){var e=this;this.fadeOut&&this.el.classList.contains(this.fadeOutClass)&&(this.el.classList.remove(this.fadeOutClass),this.cursor&&this.cursor.classList.remove(this.fadeOutClass));var i=this.humanizer(this.typeSpeed),r=1;!0!==this.pause.status?this.timeout=setTimeout(function(){s=n.typeHtmlChars(t,s,e);var i=0,o=t.substring(s);if("^"===o.charAt(0)&&/^\^\d+/.test(o)){var a=1;a+=(o=/\d+/.exec(o)[0]).length,i=parseInt(o),e.temporaryPause=!0,e.options.onTypingPaused(e.arrayPos,e),t=t.substring(0,s)+t.substring(s+a),e.toggleBlinking(!0)}if("`"===o.charAt(0)){for(;"`"!==t.substring(s+r).charAt(0)&&(r++,!(s+r>t.length)););var u=t.substring(0,s),p=t.substring(u.length+1,s+r),c=t.substring(s+r+1);t=u+p+c,r--}e.timeout=setTimeout(function(){e.toggleBlinking(!1),s>=t.length?e.doneTyping(t,s):e.keepTyping(t,s,r),e.temporaryPause&&(e.temporaryPause=!1,e.options.onTypingResumed(e.arrayPos,e))},i)},i):this.setPauseStatus(t,s,!0)},s.keepTyping=function(t,s,e){0===s&&(this.toggleBlinking(!1),this.options.preStringTyped(this.arrayPos,this));var n=t.substring(0,s+=e);this.replaceText(n),this.typewrite(t,s)},s.doneTyping=function(t,s){var e=this;this.options.onStringTyped(this.arrayPos,this),this.toggleBlinking(!0),this.arrayPos===this.strings.length-1&&(this.complete(),!1===this.loop||this.curLoop===this.loopCount)||(this.timeout=setTimeout(function(){e.backspace(t,s)},this.backDelay))},s.backspace=function(t,s){var e=this;if(!0!==this.pause.status){if(this.fadeOut)return this.initFadeOut();this.toggleBlinking(!1);var i=this.humanizer(this.backSpeed);this.timeout=setTimeout(function(){s=n.backSpaceHtmlChars(t,s,e);var i=t.substring(0,s);if(e.replaceText(i),e.smartBackspace){var r=e.strings[e.arrayPos+1];e.stopNum=r&&i===r.substring(0,s)?s:0}s>e.stopNum?(s--,e.backspace(t,s)):s<=e.stopNum&&(e.arrayPos++,e.arrayPos===e.strings.length?(e.arrayPos=0,e.options.onLastStringBackspaced(),e.shuffleStringsIfNeeded(),e.begin()):e.typewrite(e.strings[e.sequence[e.arrayPos]],s))},i)}else this.setPauseStatus(t,s,!1)},s.complete=function(){this.options.onComplete(this),this.loop?this.curLoop++:this.typingComplete=!0},s.setPauseStatus=function(t,s,e){this.pause.typewrite=e,this.pause.curString=t,this.pause.curStrPos=s},s.toggleBlinking=function(t){this.cursor&&(this.pause.status||this.cursorBlinking!==t&&(this.cursorBlinking=t,t?this.cursor.classList.add("typed-cursor--blink"):this.cursor.classList.remove("typed-cursor--blink")))},s.humanizer=function(t){return Math.round(Math.random()*t/2)+t},s.shuffleStringsIfNeeded=function(){this.shuffle&&(this.sequence=this.sequence.sort(function(){return Math.random()-.5}))},s.initFadeOut=function(){var t=this;return this.el.className+=" "+this.fadeOutClass,this.cursor&&(this.cursor.className+=" "+this.fadeOutClass),setTimeout(function(){t.arrayPos++,t.replaceText(""),t.strings.length>t.arrayPos?t.typewrite(t.strings[t.sequence[t.arrayPos]],0):(t.typewrite(t.strings[0],0),t.arrayPos=0)},this.fadeOutDelay)},s.replaceText=function(t){this.attr?this.el.setAttribute(this.attr,t):this.isInput?this.el.value=t:"html"===this.contentType?this.el.innerHTML=t:this.el.textContent=t},s.bindFocusEvents=function(){var t=this;this.isInput&&(this.el.addEventListener("focus",function(s){t.stop()}),this.el.addEventListener("blur",function(s){t.el.value&&0!==t.el.value.length||t.start()}))},s.insertCursor=function(){this.showCursor&&(this.cursor||(this.cursor=document.createElement("span"),this.cursor.className="typed-cursor",this.cursor.setAttribute("aria-hidden",!0),this.cursor.innerHTML=this.cursorChar,this.el.parentNode&&this.el.parentNode.insertBefore(this.cursor,this.el.nextSibling)))},t}()});
+//# sourceMappingURL=typed.umd.js.map

EnvelopeGenerator.WebUI/EnvelopeGenerator.WebUI/yarp.json

@@ -0,0 +1,39 @@
+{
+  "ReverseProxy": {
+    "Routes": {
+      "api-route": {
+        "ClusterId": "api-cluster",
+        "Match": {
+          "Path": "/api/{**catch-all}"
+        }
+      },
+      "swagger-route": {
+        "ClusterId": "api-cluster",
+        "Match": {
+          "Path": "/swagger/{**catch-all}"
+        }
+      },
+      "openapi-route": {
+        "ClusterId": "api-cluster",
+        "Match": {
+          "Path": "/openapi/{**catch-all}"
+        }
+      },
+      "scalar-route": {
+        "ClusterId": "api-cluster",
+        "Match": {
+          "Path": "/scalar/{**catch-all}"
+        }
+      }
+    },
+    "Clusters": {
+      "api-cluster": {
+        "Destinations": {
+          "api-destination": {
+            "Address": "https://localhost:8088"
+          }
+        }
+      }
+    }
+  }
+}

EnvelopeGenerator.sln

@@ -23,6 +23,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{134D4164-B29
 	ProjectSection(SolutionItems) = preProject
 		COPILOT_CONTEXT.md = COPILOT_CONTEXT.md
 		FORM_APPLICATION_CONTEXT.md = FORM_APPLICATION_CONTEXT.md
+		MIGRATION_CONTEXT.md = MIGRATION_CONTEXT.md
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{0CBC2432-A561-4440-89BC-671B66A24146}"
@@ -43,6 +44,12 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.Dependenc
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.ReceiverUI", "EnvelopeGenerator.ReceiverUI\EnvelopeGenerator.ReceiverUI.csproj", "{FB2D306B-1042-4A70-31ED-F991A1599371}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "EnvelopeGenerator.WebUI", "EnvelopeGenerator.WebUI", "{BF1700D5-592E-4FFA-84E8-5480E289A1F0}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.WebUI", "EnvelopeGenerator.WebUI\EnvelopeGenerator.WebUI\EnvelopeGenerator.WebUI.csproj", "{DF45876C-1010-4000-8630-7A03A536B7A2}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.WebUI.Client", "EnvelopeGenerator.WebUI\EnvelopeGenerator.WebUI.Client\EnvelopeGenerator.WebUI.Client.csproj", "{1C9D8EA3-FC62-4B68-832F-FF3EB83A9FE5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -101,6 +108,14 @@ Global
 		{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
+		{DF45876C-1010-4000-8630-7A03A536B7A2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DF45876C-1010-4000-8630-7A03A536B7A2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DF45876C-1010-4000-8630-7A03A536B7A2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DF45876C-1010-4000-8630-7A03A536B7A2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1C9D8EA3-FC62-4B68-832F-FF3EB83A9FE5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1C9D8EA3-FC62-4B68-832F-FF3EB83A9FE5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1C9D8EA3-FC62-4B68-832F-FF3EB83A9FE5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1C9D8EA3-FC62-4B68-832F-FF3EB83A9FE5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -122,6 +137,9 @@ Global
 		{EC768913-6270-14F4-1DD3-69C87A659462} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
 		{5DCCF9A1-C03F-90E6-87D3-E96DB25250C2} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
 		{FB2D306B-1042-4A70-31ED-F991A1599371} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
+		{BF1700D5-592E-4FFA-84E8-5480E289A1F0} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
+		{DF45876C-1010-4000-8630-7A03A536B7A2} = {BF1700D5-592E-4FFA-84E8-5480E289A1F0}
+		{1C9D8EA3-FC62-4B68-832F-FF3EB83A9FE5} = {BF1700D5-592E-4FFA-84E8-5480E289A1F0}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {73E60370-756D-45AD-A19A-C40A02DACCC7}