fix(ui): prevent Combobox search-filtered entries from losing click events

[silmin]

What?

When using the Combobox with search filtering (e.g. CodeBlock language selector), clicking a filtered entry closes the popup but doesn't trigger onSelect. Without filtering, selection works correctly.

Why?

The Popup's handleActionableClick listener detects the [role="menuitem"] click and closes the popup, which calls setSearchValue('') via onToggleClose.
This rebuilds the entry list, removing the clicked DOM node before React's synthetic onClick can fire.

How?

The fix adds data-popup-prevent-close to Combobox entry divs.
Popup already checks for this attribute in handleActionableClick (Popup/index.tsx L323-324) and skips auto-closing, letting the Combobox's own handleClick handle both selection and closing.

One-line change in packages/ui/src/elements/Combobox/index.tsx.

[silmin]

@jacobsfletch @AlessioGr @JarrodMFlesch
Hi wonderful maintainers,

Just a gentle ping on this PR. Has anyone had a chance to take a look?

I am currently working around this issue in my local environment using pnpm patch, but I believe this fix would be very helpful for everyone else using the Combobox component.

I would really appreciate it if you could review this when you have some time. Thank you!