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/components/TeamCreateForm.vue

@@ -70,6 +70,7 @@
 <script setup lang="ts">
 import { CreateTeamDocument } from '~/composables/graphql/user/teams-generated'
 
+const { t } = useI18n()
 const emit = defineEmits(['teamCreated', 'cancel'])
 
 const teamName = ref('')
@@ -93,9 +94,9 @@ const handleSubmit = async () => {
     emit('teamCreated', result.createTeam?.team)
     teamName.value = ''
     teamType.value = 'BUYER'
-  } catch (err: any) {
+  } catch (err: unknown) {
     hasError.value = true
-    error.value = err?.message || $t('teams.errors.create_failed')
+    error.value = err instanceof Error ? err.message : t('teams.errors.create_failed')
     console.error('Error creating team:', err)
   } finally {
     isLoading.value = false