🛑 Stop Button

❌ Don't

let outcome = tokio::select! {
    value = process.next()          => Outcome::Done(value),
        _ = tokio::signal::ctrl_c() => Outcome::Interrupted,
};

✅ Do

struct InterruptSignal;
let (interrupt_tx, interrupt_rx) = tokio::sync::mpsc::<InterruptSignal>(8);

let outcome = tokio::select! {
    value = process.next()      => Outcome::Done(value),
        _ = interrupt_rx.recv() => Outcome::Interrupted,
};

and:

// CLI
tokio::spawn(async move {
    tokio::signal::ctrl_c().await.unwrap();
    let _ = interrupt_tx.send(InterruptSignal).await;
});

// Web / Desktop
async fn handle_request(request: Request) -> Response {
    match request {
        Request::Interrupt { execution_id } => {
            let executions = executions.lock().await;
            let execution = executions.get(execution_id);
            let interrupt_tx = execution.interrupt_tx();
            let _ = interrupt_tx.send(InterruptSignal).await;
        }
        // ..
    }
}