v2026.5.3.1
- Fix ChannelManager startup: use require() instead of await import()
- Save Telegram uploads for agent context
- Handle Telegram polling conflicts on stop
- Improve Telegram formatting and typing
- Register Telegram bot commands on startup
- Harden Telegram channel restart
- Fix Telegram polling startup
- Remove NotebookNavButton from navbars (replaced by AppLauncher)
- Fix websocket chat control flow
- Fix Telegram channel integration issues