added rag-only or rag + kg-graph option for LLM response

added knowledge graphs and fix: correct BERTScore unpacking to use recall not precision (bert_score returns P,R,F1); relabel stale precision values in eval_results.json

added new webpage with feature of generating report using LLM + RAG

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Multi-book RAG support: config.BOOKS registry ingesting multiple PDFs into one Chroma collection with book-aware citations, robust chapter tagging for TOC-less/junk-TOC PDFs, an incremental --add flag to index a new PDF without a full re-embed, and updated README (multi-book docs + Limitations).

improved comments of app - 1

added comment for each code files for better understanding

completed phase b and created streamlit UI for anthropic only LLM

added basic plan made by claude