Add an infinite/page toggle with a pager

docs/media.md

@@ -184,7 +184,12 @@ that deletion is irreversible. The delete button is disabled for a 5 second coun
   can take its place while the hidden one stays resumable. The strip text turns red and reads
   `API limited, retry in Ns` while Discord throttles media traffic, and a translucent
   `N scrapes completed` line appears when scrapes finish — it lives until the tab is reloaded. Each
-  row shows `X/Yp (~Z%)` when the search total is known. The grid streams: appending a page inserts
+  row shows `X/Yp (~Z%)` when the search total is known. A flippy toggle switches the grid
+  between **Infinite** (the default stream) and **Page** mode. In page mode only one page of
+  `pageSize` items is shown; sorting/filters are deterministic, so the same filter plus page
+  number returns the same content later. The pager shows `Prev`, an editable page number,
+  ` / total`, and `Next`; scrolling to the bottom advances one page, but only after a 2 s cooldown
+  from the last load. The grid streams: appending a page inserts
   only the new cards, so loaded images never rebuild or flash, and a stream **buffer** below the last
   row keeps the scroll alive while the next page is in flight. The buffer is capped at 1.5 viewport
   heights, shrinks as the filtered results run out, and says `Loading more…` / `Scroll for more` /