Refactor: 10/10 modularity — pipeline/ package, admin/routers/ split, guards single source of truth

Overhaul: Python-first intent (3-tier), hybrid rewriter, improved system prompt, chunk dedup, LRU cache, natural upsell (button-only CTA)

Fix: book readiness check uses chunk_count+chroma_id as real truth; add stuck-book detection + Re-upload button in admin

Fix: replace Celery dispatch with asyncio.create_task for ingestion - books now properly marked ready + chatbot responds correctly

Unify token tracking, smart links, and personality settings across admin and chat.

Harden chatbot against jailbreaks, prompt injection, piracy requests, and response leaks.

Enforce brief sales-focused chatbot rules with spoiler guard and buy CTAs.

Restructure chat flow: hello shows clickable book list, then engaging Q&A.

Humanize bot responses for greetings, catalog questions, and empty RAG retrieval.

Phase 1.3+3.2: Integrate Custom Q&A into RAG pipeline (Jaccard similarity), add message feedback (👍👎) and session rating endpoints for widget

Restructure project for HF Spaces deployment