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README: the Catalog page description and a new "Fixing what the model gets wrong" section cover the curation actions (edit/split/remove) and their durability contract. Spec: amended-as-built notes — duplicate same-edition copies are now supported via explicit splits, review is both a TUI and the web app, and the data model lists the three curation stores plus the dismissed-tickets file. New Help page in the app (nav entry on every page): the six-stage flow, what each page is for, the curation semantics with undo instructions, a status-chip legend rendered with the real chips, keyboard shortcuts, and where the data lives on disk. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016jXZFSTZQKzAC8fqpWSz9g