Extracts 9 domain components from new.tsx and $leagueId.settings.tsx into
app/components/league/ (each with a Storybook story), consolidates wizard
form-building into wizard-state.ts, and updates the settings page to use
the shared components instead of hand-rolled duplicates. new.tsx shrinks
from ~2000 → ~1280 lines.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
