This code segment functions to: Coordinate the execution flow of a terminal-based simulation by managing runtime duration, processing user configuration parameters, dynamically selecting randomized activities based on complexity settings, handling interrupt signals, and orchestrating the display of various system status indicators and collaborative events.

```rust
[TASK_BEGIN]
fn main() {
    let args = Args::parse();
    let config = config::load_config(&args.project);
    let running = Arc::new(AtomicBool::new(true));
    let r = running.clone();

    ctrlc::set_handler(move || {
        r.store(false, Ordering::SeqCst);
    }).expect("Error setting Ctrl-C handler");

    let start_time = Instant::now();
    let term = Term::stdout();
    term.hide_cursor().unwrap();

    while running.load(Ordering::SeqCst) {
        let activities = generators::generate_activities(&args, &config);
        display::update_screen(&term, &activities, &args);

        if args.duration > 0 && start_time.elapsed().as_secs() >= args.duration {
            running.store(false, Ordering::SeqCst);
        }

        thread::sleep(Duration::from_millis(300));
    }

    term.show_cursor().unwrap();
    term.clear_screen().unwrap();
    println!("{}", "Session completed successfully!".green().bold());
}
[TASK_END]
```