df_plates — the plate vocabulary, and the book's own hand-drawn plates. Two jobs: 1. `Plates.normalise(tree, size)` is the gate every species' own `plate(size)` passes through. It maps the plate vocabulary onto real widget types, drops anything outside it, and strips interactivity, so a plate authored by a fauna slice can never break the page it is drawn on or steal the click that selects the specimen. 2. `Plates.drawn(id, size)` is the journal's own ink drawing of each of the thirteen animals, used when a species module ships no `plate()` of its own. A species that provides one always wins — these exist so the book is a complete object rather than a grid of empty boxes. The vocabulary is published in this slice's README. In short: `svg` is the primitive a plate should be made of, `container`/`vertical`/`horizontal` compose, `label` annotates, and `style` is the ordinary CSS surface. Slice owner: journal.