The old page was stale in ways the standard now forbids: spatial
language ("top-right"), documented URL query params users should never
need, no mention of smart collections or podcast episodes, no hand-off
to the filter docs.
Ground-truthed against the templates: Static vs lightning-Smart type
choice, Books/Podcast episodes rules scope, Add Items picker ( Books /
Episodes tabs, Add Selected, Remove Selected), Edit Rules -> Filter
tree -> Apply to Collection, Play as Sequence with the listening-order
picker (Feed order / reversed / oldest / newest), Hide finished books
(reading-queue mode) and Show Up Next strip toggles, system shelves
(Continue Reading, Recently Added, Recently Read, Not Started, Continue
Series) and Restore System -> Restore.
Plain language per the user-docs tone contract: short sentences,
pattern-first (one shelf concept, four flavors), every step ends in an
outcome, rules taught by LINK to the filter guide (reference, never
restate). Every quoted control exists as a literal and is glossaried in
ui-controls.md (gate-checked).