The assistant now has its own domain and sign-in via Yandex and VK. Accounts and projects came across; conversations did not.
Seyka became a product in its own right on its own domain. The chat now lives at seyka.ru, every conversation has its own address, and the guide moved to the /gid section. There is a proper sign-in on the site itself — via Yandex or VK — along with language and theme switches in the header.
Old addresses keep working: both unoapi.ru/seo and редиректо.ru/seo redirect to seyka.ru, so saved links won't break.
Accounts and projects were migrated — sign in the same way you did before. Conversations, however, did not survive this move: the chat list on the new domain starts empty.
Open seyka.ru and sign in with Yandex or VK.