**Interface improvements:**
- Add persistent Login/Logout buttons to main menu
- Help button now updates text above menu (not separate message)
- Expired token automatically transforms menu to Login state
- Consolidate linking success messages (single welcome + menu)
**Fix callback_data length limits (Telegram 64-byte limit):**
- Truncate client/supplier names to 40 chars in callback_data
- Use full names for API calls but truncated for buttons
- Fix pagination buttons for long partner names (30 chars limit)
- Search entities by prefix match to handle truncated names
**Treasury improvements:**
- Show ALL bank/cash accounts (removed 5-item limit)
- Remove unnecessary Refresh/Export buttons from treasury views
- Handle "Message is not modified" error gracefully
**Bug fixes:**
- Fix Markdown parsing errors (replace <cod> with `CODUL_TAU`)
- Fix silent errors when token expires (show user-friendly message)
- Fix Button_data_invalid errors on pagination and details
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>