feat(media): pagination

docs/design/screens/articles.md

@@ -1,6 +1,6 @@
 # Articles
 
-Route: `/article`, `/articles?page=2&size=50`. API: GET /v1/article/ · PATCH …/publish · PATCH …/unpublish · DELETE /v1/article/{id} · GET /v1/article/?page=&size=&q=&status= (proposed: needs backend page, size, total in the response).
+Route: `/article`, `/articles?page=2&size=50`. API: GET /v1/article/ · PATCH …/publish · PATCH …/unpublish · DELETE /v1/article/{id} · GET /v1/article/?page=&size=&q=&status= (page, size; total in the X-Total-Count header; invalid values are normalised in the URL, never shown as an error).
 
 Rows update when the server responds, not optimistically. Search, tab and sort are stored in the query string.
 
@@ -52,7 +52,7 @@ Rows update when the server responds, not optimistically. Search, tab and sort a
 
 ### Articles: pagination (group "Articles: pagination", 11 states)
 
-Route: `/articles?page=2&size=50`. API: GET /v1/article/?page=&size=&q=&status= (proposed: needs backend page, size, total in the response).
+Route: `/articles?page=2&size=50`. API: GET /v1/article/?page=&size=&q=&status= (page, size; total in the X-Total-Count header; invalid values are normalised in the URL, never shown as an error).
 
 Page and page size live in the URL as page and size. Defaults (page 1, size 25) are omitted. Allowed sizes 5, 25, 50, 100. Search, tab or sort changes reset to page 1. Rows equal the page size; the frames draw at most 10 rows. The paginator hides when everything fits on one page; the summary stays. Mobile shows Previous, "Page N of M" and Next. Keyboard: Tab reaches page size, first, previous, each page, next, last; Enter or Space activates; the current page has aria-current="page"; ArrowDown opens the page-size list, Enter selects, Esc closes.