refactor: remove all any types, add strict GraphQL scalar typing

- Add strictScalars: true to codegen.ts with proper scalar mappings
  (Date, Decimal, JSONString, JSON, UUID, BigInt → string/Record)
- Replace all ref<any[]> with proper GraphQL-derived types
- Add type guards for null filtering in arrays
- Fix bugs exposed by typing (locationLatitude vs latitude, etc.)
- Add interfaces for external components (MapboxSearchBox)

This enables end-to-end type safety from GraphQL schema to frontend.

app/composables/useCatalogHubs.ts

@@ -45,7 +45,7 @@ export function useCatalogHubs() {
   )
 
   const itemsByCountry = computed(() => {
-    const grouped = new Map<string, any[]>()
+    const grouped = new Map<string, Array<HubItem | NearestHubItem>>()
     items.value.forEach(hub => {
       const country = hub.country || t('catalogMap.labels.country_unknown')
       if (!grouped.has(country)) grouped.set(country, [])