feat(storage): first-class data - no silent failures in the persistence pipeline

feat(storage): private dataset by default + /d/* reverse proxy

fix(hf-storage): forward OAuth token on the direct-fetch fallback

feat(publisher): generate llms.txt Markdown twin for LLM agents

fix: XSS escaping, DRY utils, agent undo batch, graceful shutdown

fix: robust published article restore on container rebuild

feat: adopt template CSS architecture, hero/TOC/color alignment

fix: use manage-repos scope, public dataset, remove image proxy

feat: restore published article from HF dataset on startup

feat: auto-create private HF dataset using OAuth token

fix: resolve Buffer/Blob type errors in hf-storage

feat: add publish pipeline with HTML/PDF/thumbnail generation

chore: initial commit