Douban's English-language book records are sparse and low quality. BookPageProvider now picks a CJK title from the title or aliases for Douban (and still allows a precise ISBN), and skips Douban entirely when only a Latin title is available; Goodreads continues to cover Latin titles. Aliases now reach the page search so a translated book's Chinese title is used. New unit test covers the four cases; ISBN cross-title matching is preserved.
The curator Python backend (package, tests, systemd units, config templates, scripts) now lives under scenarios/curator/backend and is the single source of truth; the live checkout at the workspace path is a runtime copy. Exported from the app repo's tracked tree via git archive (no history, .pi/venv/caches excluded). 149 unit tests pass from the new location.
profile.toml backend is now repo-relative (scenarios/curator/backend); verify-generated.sh resolves a relative backend against REPO_ROOT. verify-no-secrets ASSIGN heuristic now requires value entropy so vendored kwargs like token=extraction_token no longer false-positive. README documents the backend/ layout and the operator-owned app rollout step.
Kai