With no text field focused, `ui.clipboard` (and MCP `clipboard`) sent
the clipboard event to the app's shortcuts: it pasted edit settings on
Windows, Linux and in headless runs, and did nothing on macOS, whose
menu bar takes ⌘V. It is now refused there; agents run `develop.copy`
and `develop.paste` instead. The docs also say that cut and copy write
the system clipboard in the desktop app.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>