Below 700px the panes stack and only the focused one is open, but switching
was bound to `Tab` and to a tap on the collapsed strip — and a phone has no
`Tab` key. The top bar now carries `library` / `queue` buttons that set the
focus, shown at every width: on desktop they double as the readout of which
pane the keys go to, which the inset border says only faintly.
The collapsed strip is the pane's toolbar with all but the title clipped, so
its buttons were the only thing a tap on it could land on — tapping to switch
panes could hit the library's "play" and replace the queue. Hidden there now.
The connection line truncates rather than pushing the tabs off a narrow
screen.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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