Refactored the friend request command service and SignalR hub to return and broadcast FriendshipDto objects, improving real-time updates. Enhanced media upload and download logic to support file storage and retrieval, including database integration. Removed all command classes and related infrastructure from the Govor.Console project, streamlining the console client. Updated dependency injection and interfaces to reflect these changes.
Split IFriendRequestService into command and query interfaces, refactor related services and tests, and update dependency injection. Add HubResult response model and a SignalR HubExceptionFilter for consistent error handling. Move and update FriendsHub to use new command service and result pattern. Update username validation to allow digits after Cyrillic letters. Add new controllers and configuration for SignalR. Remove obsolete IFriendRequestService and related code.
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