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/GetClusteredNodes.graphql

@@ -7,20 +7,20 @@ query GetClusteredNodes(
   $transportType: String
   $nodeType: String
 ) {
-  clustered_nodes(
+  clusteredNodes(
     west: $west
     south: $south
     east: $east
     north: $north
     zoom: $zoom
-    transport_type: $transportType
-    node_type: $nodeType
+    transportType: $transportType
+    nodeType: $nodeType
   ) {
     id
     latitude
     longitude
     count
-    expansion_zoom
+    expansionZoom
     name
   }
 }