1. Multiple pills now AND together — 'alice + bob' means both alice
AND bob are somewhere on the email, not 'from alice OR from bob'.
(some → every in the filter.)
2. Default autocomplete focus is now -1 (no row pre-selected) so plain
Enter commits the input as a text pill — typing then Enter behaves
like a normal search. ArrowDown / ArrowUp + Enter still picks a
contact suggestion. Tab still autocompletes the most-relevant match
regardless of arrow state.
3. Pill × button nudged up 4px so it sits on the visual centerline
inside the 18px pill height.
90acad0d4b