All geo .graphql operations and consuming code updated to match
server schema which uses snake_case field/argument names.
Removed non-existent QuoteCalculations query, using NearestOffers instead.
- Add hubCountries query and country filter for hubs page
- Add getAvailableProducts query for offers (only products with active offers)
- Add sourceLatitude/sourceLongitude to orders GraphQL
- Fix ListMapLayout with position fixed for proper map height
- GlobalSearchBar: make fields wider, remove unit selector
- Remove status/isVerified filters from suppliers/offers (backend handles this)
