- Create MessageBatcher class for debounce-based message batching
- Update make_callbacks() to include on_tool_use with progress notifications
- Add typing indicator support with stop_event control
- Implement smart message splitting with MarkdownV2 escaping
- Update handle_message() to use typing and batching
- Update handle_photo() and handle_document() to save to session directories
- Add auto-analysis for photos and file upload notifications
- Update session switching and archiving to handle typing and batchers
