- Add ThinkingWidget component for displaying AI reasoning content in collapsible interface
- Improve session initialization by removing redundant event listener and enhancing ID extraction
- Enhance StreamMessage component to handle diverse content structures and thinking content
- Add comprehensive debug logging for better message structure understanding
- Fix cost display logic to handle both cost_usd and total_cost_usd fields
- Refactor user message rendering to support both nested and direct content structures
- Remove obsolete migrate_agent_runs_to_session_ids function from agents commands
- Add trailing empty line removal logic to ReadResultWidget for cleaner code display
- Improve code presentation consistency in UI components
