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)

graphql/operations/public/exchange/GetSupplierProfiles.graphql

@@ -1,5 +1,5 @@
-query GetSupplierProfiles($country: String, $isVerified: Boolean, $limit: Int, $offset: Int) {
-  getSupplierProfiles(country: $country, isVerified: $isVerified, limit: $limit, offset: $offset) {
+query GetSupplierProfiles($country: String, $limit: Int, $offset: Int) {
+  getSupplierProfiles(country: $country, limit: $limit, offset: $offset) {
     uuid
     teamUuid
     name
@@ -7,11 +7,9 @@ query GetSupplierProfiles($country: String, $isVerified: Boolean, $limit: Int, $
     country
     countryCode
     logoUrl
-    isVerified
-    isActive
     offersCount
     latitude
     longitude
   }
-  getSupplierProfilesCount(country: $country, isVerified: $isVerified)
+  getSupplierProfilesCount(country: $country)
 }