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/pages/clientarea/offers/index.vue

@@ -122,7 +122,9 @@
 
 <script setup lang="ts">
 import type { MapBounds } from '~/components/catalog/CatalogMap.vue'
-import { GetOffersDocument } from '~/composables/graphql/public/exchange-generated'
+import { GetOffersDocument, type GetOffersQueryResult } from '~/composables/graphql/public/exchange-generated'
+
+type Offer = NonNullable<NonNullable<GetOffersQueryResult['getOffers']>[number]>
 
 definePageMeta({
   layout: 'topnav',
@@ -135,7 +137,7 @@ const { activeTeamId } = useActiveTeam()
 
 const { execute } = useGraphQL()
 const PAGE_SIZE = 24
-const offers = ref<any[]>([])
+const offers = ref<Offer[]>([])
 const totalOffers = ref(0)
 const isLoadingMore = ref(false)
 
@@ -164,7 +166,7 @@ const {
 
 watchEffect(() => {
   if (offersData.value?.getOffers) {
-    offers.value = offersData.value.getOffers
+    offers.value = offersData.value.getOffers.filter((o): o is Offer => o !== null)
     totalOffers.value = offersData.value.getOffersCount ?? offersData.value.getOffers.length
   }
 })
@@ -231,9 +233,11 @@ const onSearch = () => {
   // TODO: Implement search
 }
 
-const onSelectOffer = (offer: any) => {
-  selectedOfferId.value = offer.uuid
-  navigateTo(localePath(`/clientarea/offers/${offer.uuid}`))
+const onSelectOffer = (offer: { uuid?: string | null }) => {
+  if (offer.uuid) {
+    selectedOfferId.value = offer.uuid
+    navigateTo(localePath(`/clientarea/offers/${offer.uuid}`))
+  }
 }
 
 const getStatusVariant = (status: string) => {
@@ -293,7 +297,7 @@ const fetchOffers = async (offset = 0, replace = false) => {
     'public',
     'exchange'
   )
-  const next = data?.getOffers || []
+  const next = (data?.getOffers || []).filter((o): o is Offer => o !== null)
   offers.value = replace ? next : offers.value.concat(next)
   totalOffers.value = data?.getOffersCount ?? totalOffers.value
 }