PromptInputActionAddScreenshot uses a Radix-only event and fails with Base UI

[mmikhan]

PromptInputActionAddScreenshot listens for the menu item’s onSelect event. That works in the Radix-based docs demo, but not with Base UI’s menu item API. In our Base UI integration, switching the handler to onClick made screenshot capture work.

Steps to reproduce

1. Use PromptInputActionAddScreenshot inside PromptInputActionMenuContent in a Base UI project.
2. Open the action menu and select “Take screenshot.”

Expected behavior

The screen-capture picker opens, and the selected capture is added as an image attachment.

Actual behavior

The screenshot action does not run with the Radix-style onSelect handler.

The same event mismatch affects PromptInputActionAddAttachments.