feat: implement dark mode, knowledge base & multi-lang UI refinements

feat: redesign the new chat button

feat: rebrand to HutMind, adjust bot response width, add copy button

refactor: fix UI

fix: update frontend api base url to production backend endpoint

feat: Pivot to Pizza Hut RAG System (HutMind). Update Qdrant VectorDB, remove Neo4j, update React UI

evaluation

NewREADME

update frontend

frontend

first