MVP!

Complete realtime unread messages and chat preview

feat: improve chat UX

Complete auth error handling

Handle expired JWT globally

fix: secure SignalR chat groups

Add realtime messaging with SignalR

refactor: organize backend into controllers and services

fix: stabilize messenger layout and message scrolling

feat: add user search and chat navigation

feat: add messenger UI and theme support

Add frontend chat and messaging UI

Add chat messages API

Implement JWT authentication

Initial project setup

CI: загрузка релиза через multipart attachment

CI: публикация релиза через API (работает при запуске с main)