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/company-switch.vue

@@ -146,8 +146,8 @@ const switchToTeam = async (teamId: string) => {
       markActiveTeam(newActiveId)
       navigateTo(localePath('/clientarea/team'))
     }
-  } catch (err: any) {
-    error.value = err.message || t('clientTeamSwitch.error.switch')
+  } catch (err: unknown) {
+    error.value = err instanceof Error ? err.message : t('clientTeamSwitch.error.switch')
     hasError.value = true
   }
 }