Function spawn_cli 

pub async fn spawn_cli(db: DB, server_start: Instant, shutdown_tx: Sender<bool>)

Spawns the CLI in a separate blocking thread.

Runs an interactive command loop that listens for user input and dispatches commands to their respective handlers. The CLI operates on a dedicated thread to avoid blocking the async Tokio runtime, allowing the server to continue handling HTTP requests concurrently.

Session expiry is enforced—after 20 minutes of inactivity, users must re-authenticate with server:login before executing protected commands.

The CLI automatically exits when a shutdown signal is received via shutdown_tx.

Arguments

• db - A reference to the database connection, passed to all command handlers.
• server_start - The instant when the server started, used for uptime calculations in server:status.
• shutdown_tx - A watch channel sender that signals the CLI to exit when the server is shutting down.

Example

let (shutdown_tx, shutdown_rx) = tokio::sync::watch::channel(false);
cli::spawn_cli(db, server_start, shutdown_tx).await;