The playlists section used to render an always-open list plus a dedicated
create input, growing the rail taller with every playlist. Replace it with a
single Combobox field (reusing the shared component, like the feed's "Your
tags"): the list of playlists only appears when the dropdown is opened, and
typing a name that doesn't exist offers a "Create …" row. Picking a playlist
opens it (the existing playlistOpen hand-off); the create row creates then opens
the new one. `selected` stays empty — this picks an action, not a persisted value.
peter
6c7038cf1f