fix(design): the saved-view chip on one line, one Escape per layer, the /watch action row (E28 S3d)

- SelectTrigger lays its toolbar value out as a row; the saved-view chip passes its glyph and
  modified dot through the icon/trailing slots (an <svg> is display:block and broke the chip in two).
- One Escape in a dialog's open list closed the list AND the dialog: the list's close flushes
  synchronously and pops its layer before the dialog's window listener runs. takeEscape() is the one
  close-on-Escape test (topmost AND not yet taken); Modal, the Welcome lightbox and useLayer use it,
  and keymap.dispatch ignores a taken Escape.
- /watch: the Download sits on the toolbar rung, level with the Repeat chip.

frontend/src/components/WatchPage.tsx

@@ -395,8 +395,9 @@ export default function WatchPage() {
                 >
                   {T.repeat}
                 </Chip>
+                {/* The toolbar rung, level with the Repeat chip beside it (one row, one height). */}
                 {meta.allow_download && (
-                  <LinkButton href={meta.file_url} icon={<Download />}>
+                  <LinkButton href={meta.file_url} icon={<Download />} size="sm">
                     {T.download}
                   </LinkButton>
                 )}