THE “BEFORE” OF this story stretches back nearly a century to a significant architectural milestone that now grounds a newly elegant, supremely functional kitchen as the “after” hub of the home — and as homage. Brandon and Jill (plus their “two-legged kid,” who is 9, and their “four-legged kid,” who is a giant German shepherd) live in a historic 1927 French Colonial in West Seattle designed by Elizabeth Ayer, the first woman to graduate from the professional architecture program at the University of Washington and the first woman registered as an architect in the state. Brandon and Jill had driven by Ayer’s creation from time to time and always were drawn…