- gatsby-node.js: add companyName and showCompanyName to SoamesSettings
  node (sourced from /soames/v1/settings REST endpoint)
- Logo.tsx: query companyName/showCompanyName; fall back to WP site title
  if companyName is blank; hide name entirely when showCompanyName is false
- Footer.tsx: remove pb-4 from copyright paragraph (padding now handled
  by .soames-footer CSS override in consuming sites)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>