Add configurable SignatureFieldParams class

Introduce `SignatureFieldParams` class to manage signature field dimensions with configurable `Width` and `Height`. Integrate this configuration into the service collection and replace hardcoded dimensions in `CreateEnvelopeCommandHandler.cs` and `SenderEditorPage.razor`. Update `appsettings.json` to include the new configuration section, allowing runtime adjustments.

EnvelopeGenerator.Server/EnvelopeGenerator.Server.Client/Pages/SenderEditorPage.razor

@@ -7,11 +7,13 @@
 @using EnvelopeGenerator.Application.Resources
 @using EnvelopeGenerator.Domain.Constants
 @using EnvelopeGenerator.Domain.Resources
+@using EnvelopeGenerator.Application.Common.Configurations
 @using EnvelopeGenerator.Server.Client.Components.PdfEditor
 @using EnvelopeGenerator.Server.Client.Services
 @using Microsoft.AspNetCore.WebUtilities
 @using Microsoft.AspNetCore.Components.Forms
 @using Microsoft.Extensions.Localization
+@using Microsoft.Extensions.Options
 @inject IJSRuntime JSRuntime
 @inject NavigationManager NavigationManager
 @inject AppVersionService AppVersion
@@ -25,6 +27,7 @@
 @inject AuthService AuthService
 @inject IStringLocalizer<Resource> UiLocalizer
 @inject IStringLocalizer<Model> ModelLocalizer
+@inject IOptionsMonitor<SignatureFieldParams> SignatureFieldOptions
 
 <link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
 <link href="_content/DevExpress.Blazor.Viewer/css/dx-blazor-viewer-components.bs5.css" rel="stylesheet" />
@@ -598,10 +601,11 @@
     [SupplyParameterFromQuery(Name = "bootstrapToken")]
     public string? BootstrapToken { get; set; }
 
-    // ── Constants ──
-    // Signature field size in PDF points (fixed): 1.77" × 1.96"
-    const double SigWidthPt = 1.77 * 72;   // 127.44 pt
-    const double SigHeightPt = 1.96 * 72;   // 141.12 pt
+    // ── Signature field size (configurable) ──
+    double SigWidthInches => SignatureFieldOptions.CurrentValue.Width;
+    double SigHeightInches => SignatureFieldOptions.CurrentValue.Height;
+    double SigWidthPt => SigWidthInches * 72.0;
+    double SigHeightPt => SigHeightInches * 72.0;
 
     // CssClass for JS click coordinate helper
     const string ViewerCssClass = "sender-editor-pdf-viewer";

EnvelopeGenerator.Server/EnvelopeGenerator.Server.Client/Program.cs

@@ -6,6 +6,7 @@ using DevExpress.XtraReports.Web.Extensions;
 using DevExpress.DataAccess.Web;
 using DevExpress.XtraReports.Services;
 using System.Globalization;
+using EnvelopeGenerator.Application.Common.Configurations;
 
 var builder = WebAssemblyHostBuilder.CreateDefault(args);
 
@@ -31,6 +32,8 @@ builder.Services.AddScoped(sp => new HttpClient
 // Configuration Options
 builder.Services.Configure<PdfViewerOptions>(opts =>
     builder.Configuration.GetSection(PdfViewerOptions.SectionName).Bind(opts));
+builder.Services.Configure<SignatureFieldParams>(opts =>
+    builder.Configuration.GetSection(nameof(SignatureFieldParams)).Bind(opts));
 
 // Business Services
 builder.Services.AddScoped<DocumentService>();

EnvelopeGenerator.Server/EnvelopeGenerator.Server/appsettings.json

@@ -58,6 +58,10 @@
     "MainCanvasEnableHiDPI": true,
     "ZoomStepPercentage": 5
   },
+  "SignatureFieldParams": {
+    "Width": 1.77,
+    "Height": 1.96
+  },
   "DocumentService": {
     "BaseUrl": "http://172.24.12.39:9393"
   },

EnvelopeGenerator.Server/EnvelopeGenerator.Server/wwwroot/appsettings.json

@@ -14,5 +14,9 @@
     "RenderingOpacity": 0.85,
     "ThumbnailRenderDelay": 50,
     "ZoomStepPercentage": 5
+  },
+  "SignatureFieldParams": {
+    "Width": 1.77,
+    "Height": 1.96
   }
 }