The palette got PageUp/PageDown, and the same crawl stayed everywhere else a list opens under a
control: the sidebar's channel filter, the Plex genre/studio/collection pickers, the filter and sort
menus, submenus of every playlist you own. floating-ui's list navigation has only the arrows and
Home/End.
- `lib/listPaging`: the one definition of a page (the rows wholly in view minus one, a fixed 10 with
no layout) and of where it lands (stops at both ends, never on a row it may not take, looking back
toward the start rather than past it). The palette now uses it instead of its own copy, and
`listNav` takes its scroll-parent helper from here.
- `AnchoredPopover`: one keydown handler on the reference AND the surface, so a combobox (keys on its
input, `aria-activedescendant`) and a roving menu (keys on the focused row) both page. It runs after
floating-ui's own, which has by then switched to keyboard modality and scrolls the new row in. A
disabled row is never the target; a submenu's key does not also page the menu around it; with no
mounted rows (closed, a hover card, a dialog) the key keeps its native meaning.
Measured in the browser: the channel filter shows 8 rows and pages by 7 with the active row in view
after the scroll; a menu pages to its last row and back, the page behind it does not scroll; the
palette still pages by 11 of its 12 visible rows.
peter
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