- Add 3 user roles: user, admin, super_admin - Restrict LLM config management to super_admin only - Restrict audit logs and statistics to super_admin only - Update AdminPage with role-based tab visibility - Add complete 5 Why prompt from 5why-analyzer.jsx - Add system documentation and authorization guide - Add ErrorModal component and seed test users script 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>