Struct Seat

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struct Seat {
    listeners: BTreeSet<u64>,
    queue: UnboundedSender<Job>,
    live: Arc<AtomicUsize>,
    noted: bool,
}

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§listeners: BTreeSet<u64>§queue: UnboundedSender<Job>§live: Arc<AtomicUsize>

The listener count the render task reads, so it stops between sentences the moment the last one leaves rather than draining a queue nobody will hear.

§noted: bool

The session has been told the user is listening and not yet told they stopped. A pause keeps it true, so a seat switch does not toggle the agent; an explicit off clears it.

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impl UnwindSafe for Seat

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