fix(ui): add missing error handling in index reset except block

feat(ui): add 1-click evaluation log download button in Admin RAGAS portal

feat(ui): revamp frontend with glassmorphism styling, role-based observability tabs, and live chat termination

feat: implement Redis session memory and multi-turn conversational RAG with coreference resolution

feat(deploy): release Support Docs Copilot for Hugging Face Spaces

feat: add multi-turn conversation memory

feat: implement JWT authentication with role-based access

feat: add production config and readiness checks

feat: build Streamlit chat interface for support copilot