Replace SignatureService with DocReceiverElementService

Refactor EnvelopeReceiverPage.razor to inject
DocReceiverElementService instead of SignatureService.

Update Program.cs to remove SignatureService from the
dependency injection configuration and add
DocReceiverElementService as a scoped service.

This change reflects a shift in architecture where
DocReceiverElementService now handles functionality
previously managed by SignatureService.

EnvelopeGenerator.ReceiverUI/Pages/EnvelopeReceiverPage.razor

@@ -11,7 +11,7 @@
 @inject IOptions<ApiOptions> AppOptions
 @inject IOptions<PdfViewerOptions> PdfViewerOptions
 @inject IJSRuntime JSRuntime
-@inject SignatureService SignatureService
+@inject DocReceiverElementService SignatureService
 @inject SignatureCacheService SignatureCacheService
 @inject EnvelopeGenerator.ReceiverUI.Services.AuthService AuthService
 @inject EnvelopeGenerator.ReceiverUI.Services.EnvelopeReceiverService EnvelopeReceiverService

EnvelopeGenerator.ReceiverUI/Program.cs

@@ -22,7 +22,7 @@ builder.Services.AddScoped<DocumentService>();
 builder.Services.AddScoped<AuthService>();
 builder.Services.AddScoped<AnnotationService>();
 builder.Services.AddScoped<EnvelopeReceiverService>();
-builder.Services.AddScoped<SignatureService>();
+builder.Services.AddScoped<DocReceiverElementService>();
 builder.Services.AddScoped<SignatureCacheService>();
 builder.Services.AddSingleton<AppVersionService>();
 builder.Services.AddScoped<EnvelopeService>();