research: create UI redesign plan with 28 items

- Analyzed current AgentGUI design (sidebar-based chat interface)
- Researched modern patterns from ChatGPT, Claude.ai, GitHub Copilot, Cursor, Continue.dev
- Identified 24 UI features and 4 infrastructure items
- Organized by priority: 7 large, 11 medium, 10 small effort
- Phase-based implementation plan (4 weeks)
- Total estimated: ~45 hours of work

https://claude.ai/code/session_01Tjw1VGM3HCVsAL9qQmZgfY

Author: lanmower