Fix geo GraphQL schema mismatch: camelCase → snake_case

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.

graphql/operations/public/geo/NearestOffers.graphql

@@ -1,34 +1,34 @@
 query NearestOffers($lat: Float!, $lon: Float!, $radius: Float, $productUuid: String, $hubUuid: String, $limit: Int) {
-  nearestOffers(lat: $lat, lon: $lon, radius: $radius, productUuid: $productUuid, hubUuid: $hubUuid, limit: $limit) {
+  nearest_offers(lat: $lat, lon: $lon, radius: $radius, product_uuid: $productUuid, hub_uuid: $hubUuid, limit: $limit) {
     uuid
-    productUuid
-    productName
-    supplierUuid
-    supplierName
+    product_uuid
+    product_name
+    supplier_uuid
+    supplier_name
     latitude
     longitude
     country
-    countryCode
-    pricePerUnit
+    country_code
+    price_per_unit
     currency
     quantity
     unit
-    distanceKm
+    distance_km
     routes {
-      totalDistanceKm
-      totalTimeSeconds
+      total_distance_km
+      total_time_seconds
       stages {
-        fromUuid
-        fromName
-        fromLat
-        fromLon
-        toUuid
-        toName
-        toLat
-        toLon
-        distanceKm
-        travelTimeSeconds
-        transportType
+        from_uuid
+        from_name
+        from_lat
+        from_lon
+        to_uuid
+        to_name
+        to_lat
+        to_lon
+        distance_km
+        travel_time_seconds
+        transport_type
       }
     }
   }