The hero switch is the panel's on/off, so it now carries output and input
together rather than output alone. It reads as on while anything is still
audible, which keeps muting a single channel from flipping the master switch.
Right-clicking a volume bar mutes just that channel -- output, input, or one
app's stream -- matching what the `m` key already does for the focused row.
Only channels that exist get a vote: a machine with no default source would
otherwise report its input unmuted forever, leaving the switch able to mute but
never to unmute.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>