GameView

Clear the entire screen / viewport.

On a terminal implementation this is usually an ANSI escape sequence; on Swing it might reset a text area; on web it may send a “clear” event.

Render text or any printable value.

Implementations decide where to display: • console (println) • Swing text area • web socket, etc.

Show an error message to the player.

Recommended to prefix the text with "Error: " or apply red colour, but exact styling is up to the concrete adapter.

Block (or suspend) until the next player command is available.

Implementations must: • return an empty/default value if the input source is closed; • guarantee that reads are safe to call repeatedly; • suspend in F rather than performing side effects eagerly.