Introduced ReceiverApiClient.cs, a typed HTTP client for the EnvelopeGenerator receiver API. It provides strongly-typed methods for authentication, envelope and document retrieval, annotation/signature actions, read-only sharing, logout, and localization. The client uses dependency injection, handles error logging, and ensures authentication cookies are attached via same-origin requests.
Introduced EnvelopeDtos.cs and ReceiverAuthDtos.cs under EnvelopeGenerator.ReceiverUI.Web.Client.Api.Models. These files define client-side DTOs that mirror server-side models, exposing only the fields required by the receiver UI. EnvelopeDtos.cs covers envelopes, documents, receivers, and signature elements, while ReceiverAuthDtos.cs handles authentication responses and requests. All DTOs are documented and structured for camelCase JSON serialization, improving maintainability and clarity for API interactions in the receiver UI.
