docs: consolidate design change logs and refresh stale docs

features/media_pagination_api.qa.md

@@ -27,7 +27,7 @@ Helper: decode into {items []map, total, page, size int, counts {all, unused, du
 - `docs/api.md` lines 99-103: replace `cursor` and `limit` with `page` (default 1) and `size` (5, 25, 50, 100; default 25); state the envelope (`items`, `total`, `page`, `size`, `counts`), that `counts` stays library-wide, that invalid values answer 400 "The media query is invalid.", and a "Breaking change" note: `next_cursor` is gone, `cursor` and `limit` are ignored.
 - `docs/api/*.md`: grep for `/v1/media/` and `cursor`; update the media listing section if one exists.
 - `web/src/data/apiCatalogue.ts` `med-list`: add `page`, `size`, `q`, `filter`, `sort`, `variants`, `hash` query entries, the 400 error, and a paged example (`total`, `page`, `size`, no `next_cursor`). Remove the `next_cursor` rule (line ~129, with its French entry in `web/src/i18n/messages.ts` line ~1606) if it is only used by media. Integration specs asserting the catalogue are amended.
-- Flag for the user (read-only to agents): `docs/design/screens/integration.md` and `docs/design/source/IntegrationPage.dc.html` (med-list with no params), `docs/design/screens/media.md`, `routes.md`, `change-list.md` item 13b, `README.md` line 92 and `screens/media-picker.md`: all still say "array body" and "X-Total-Count".
+- Flag for the user (read-only to agents): `docs/design/screens/integration.md` and `docs/design/source/IntegrationPage.dc.html` (med-list with no params), `docs/design/screens/media.md`, `routes.md`, `README.md` line 92 and `screens/media-picker.md`: all still say "array body" and "X-Total-Count".
 - A release note under `docs/releases/` is the maintainer's call: flag it.
 
 ## Manual verification