Stage 7 - Integration:
- Create notification types migration for procurement
- Fix signals to use pre_save for status tracking
- Add broadcast_request_update function for WebSocket events
- Add procurement_update handler in UserConsumer
- Add 6 integration tests for signals and notifications
- Update README with integration details
All 72 tests passing (66 base + 6 integration).
- Added departments ManyToMany field to Document model
- Implemented department selection in document create/edit modals
- Added automatic notification creation for all department employees
- Fixed document filtering to include uploaded documents in 'My Documents'
- Fixed acknowledgements API to include department recipients
- Added bulk notification support with configurable threshold
- Removed acknowledge button, added visual highlighting for unread documents
- Implemented server-side acknowledgment flow with redirect to file
- Fixed mobile responsive layout for document actions
- Removed temporary test files and documentation
- ApiClient теперь обрабатывает 401 и 403 ошибки для обновления токена
- Добавлен JWTRefreshMiddleware для проактивного обновления токенов за 5 минут до истечения
- Добавлена настройка JWT_REFRESH_THRESHOLD_MINUTES (по умолчанию 5)
- Исправлена проблема с периодическими 403 ошибками после истечения access token
