// terminalEventText returns the text that the client shows for event, or "" for
// none. The client shows a user message only from another source, such as
// telegram, because the user typed the others. A tool result shows its first
// terminalEventText returns the text that the client shows for event, or "" for
// none. The client shows a user message only from another source, such as
// telegram, because the user typed the others. A tool result shows its first