fix(ui): focus, paging and state that a key or a finger can reach

- A key landing on a side panel's tab steps into the card it peeks open, not onto the hidden tab.
- The Channels cards keep their status / pager row at the list's end while the band is folded.
- A menu row's note shows on an enabled row too: the download state under 'Download…', not a title.
- A removal chip hands the focus to its neighbour before it goes, for every caller (the feed's and
  Plex's active filters); the hidden-filter cue's own copy is gone.
- Back to a spot within a page's end spacer lands at the page's end, not its top.
- A running push / revert is tracked per list: another list's push is no longer refused unseen.

frontend/src/components/Channels.tsx

@@ -771,6 +771,14 @@ export default function Channels() {
                   rowProps={rowMenu.triggerProps}
                   rowClassName={() => "group"}
                 />
+                {/* Folded, the status / pager row leaves the band, as the table's does — and the
+                    list's own end keeps it here too (round 2, F2: the cards had lost their pager). */}
+                {fold.folded && (
+                  <div className="pt-3 flex items-center justify-between gap-3 flex-wrap">
+                    {statusChips}
+                    {cardPager}
+                  </div>
+                )}
               </>
             )}
             <ContextMenu menu={rowMenu} ariaLabel={t("channels.row.menu")} items={menuItems} />