- Shared invite links open the Mini App fullscreen (mode=fullscreen), so a
shared link matches the bot's own fullscreen launch.
- A used or expired invite deep-link now lands the visitor in the lobby with a
gentle notice pointing at the right bot (@<username>, by service language),
instead of a red "code invalid/expired" error on the Friends screen.
- The in-game close confirmation is armed only on Telegram mobile clients; on
desktop (tdesktop/macOS/web) it is skipped, where the "changes may not be
saved" dialog is just noise (drafts auto-save).
Ilia Denisov