fix: migrate geo GraphQL queries and frontend to camelCase

Geo backend was migrated to camelCase but frontend .graphql files and
component code still used snake_case, causing 400 errors on all geo API calls.

graphql/operations/public/geo/NearestOffers.graphql

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