prepare hugging face deployment and enable gitguardian

lazy-load RAG deps and pin frontend versions

Update README and API to clarify RAG_WORKING_DIR usage for LightRAG index storage

Update comparison modes to 'hybrid' and add icon component for frontend

Add comparison modal for side-by-side answer display in the frontend

Add comparison feature for query modes in the API and frontend

Add citation marker stripping and intro popup for user guidance

Add mode selection for query submission and update streaming logic

Add follow-up question generation and display in the chatbot interface

adding streaming

Replace Chainlit with Next.js RAG pipeline visualizer