UI improvements: filters, map layout, search bar

- 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)

app/composables/useCatalogOffers.ts

@@ -35,7 +35,6 @@ export function useCatalogOffers() {
         {
           limit: PAGE_SIZE,
           offset,
-          status: 'active',
           productUuid: selectedProductUuid.value
         },
         'public',