feat(envelope): bypass access-code flow when UseAccessCode is disabled

- Add logic to skip access-code workflow if UseAccessCode is false
- Auto-authenticate receiver and show envelope immediately
- Preserve rejection and signed checks
- Keep existing behavior for access-code enabled envelopes

EnvelopeGenerator.Application/Common/Dto/EnvelopeDto.cs

@@ -82,7 +82,7 @@ public record EnvelopeDto
     /// <summary>
     /// 
     /// </summary>
-    public bool? UseAccessCode { get; set; }
+    public bool UseAccessCode { get; set; } = true;
 
     /// <summary>
     /// 

EnvelopeGenerator.Web/Controllers/EnvelopeController.cs

@@ -95,6 +95,23 @@ public class EnvelopeController : ViewControllerBase
             }
             #endregion
 
+            #region UseAccessCode
+            if (!er.Envelope!.UseAccessCode)
+            {
+                (string? uuid, string? signature) = decoded.ParseEnvelopeReceiverId();
+                var er_secret_res = await _envRcvService.ReadWithSecretByUuidSignatureAsync(uuid: uuid!, signature: signature!);
+
+                if (er_secret_res.IsFailed)
+                {
+                    _logger.LogNotice(er_secret_res.Notices);
+                    return this.ViewEnvelopeNotFound();
+                }
+                var er_secret = er_secret_res.Data;
+                await HttpContext.SignInEnvelopeAsync(er_secret, ReceiverRole.FullyAuth);
+                return await CreateShowEnvelopeView(er_secret);
+            }
+            #endregion UseAccessCode
+
             #region Send Access Code
             bool accessCodeAlreadyRequested = await _historyService.AccessCodeAlreadyRequested(envelopeId: er.Envelope!.Id, userReference: er.Receiver!.EmailAddress);
             if (!accessCodeAlreadyRequested)
@@ -199,7 +216,7 @@ public class EnvelopeController : ViewControllerBase
             return this.ViewInnerServiceError();
         }
     }
-
+    
     private async Task<IActionResult> CreateEnvelopeLockedView(EnvelopeReceiverDto er, CancellationToken cancel)
     {
         var uuidClaim = User.GetAuthEnvelopeUuid();