pub fn run(db: Option<&str>) -> anyhow::Result<()> {
let db_url = db
.map(|s| s.to_owned())
.or_else(|| std::env::var("DATABASE_URL").ok())
.ok_or_else(|| {
anyhow::anyhow!("DATABASE_URL not set — pass --db <URL> or set DATABASE_URL in .env")
})?;
let rt = tokio::runtime::Runtime::new()?;
rt.block_on(rok_tui::run(&db_url))?;
Ok(())
}