v0.19.0a0

v0.19.0a0 (2026-06-05)

Feat

• client,papers,spa: qatlas paper subcommand + /papers/search RAG UI
• papers,rag: paper-access expansion (PDF/RAG/DOI/resolution) + rename two server env vars
• qatlasd: storage migrate-layout subcommand for pre-A1 old-style PDFs
• arxiv,openalex: server-side PDF fetcher + DOI resolver

Refactor

• auth: OAuth device-code login + drop client-side token shadows
• paperassets: structured ParsedArxivID + per-category storage layout

Full Changelog: v0.18.2...v0.19.0a0