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.

app/components/CalcResultContent.vue

@@ -152,17 +152,17 @@ const fetchOffersByHub = async () => {
     'geo'
   )
 
-  const offers = offersResponse?.nearest_offers || []
+  const offers = offersResponse?.nearestOffers || []
 
   // Offers already include routes from backend
   const offersWithRoutes = offers
     .filter((offer): offer is NonNullable<OfferWithRoute> => offer !== null)
     .map((offer) => ({
       sourceUuid: offer.uuid,
-      sourceName: offer.product_name,
+      sourceName: offer.productName,
       sourceLat: offer.latitude,
       sourceLon: offer.longitude,
-      distanceKm: offer.distance_km,
+      distanceKm: offer.distanceKm,
       routes: offer.routes || []
     }))
 
@@ -209,10 +209,10 @@ const getRouteStages = (option: ProductRouteOption) => {
   return route.stages
     .filter((stage): stage is NonNullable<RouteStage> => stage !== null)
     .map((stage) => ({
-      transportType: stage.transport_type,
-      distanceKm: stage.distance_km,
-      travelTimeSeconds: stage.travel_time_seconds,
-      fromName: stage.from_name
+      transportType: stage.transportType,
+      distanceKm: stage.distanceKm,
+      travelTimeSeconds: stage.travelTimeSeconds,
+      fromName: stage.fromName
     }))
 }