feat: implement pre-selection for nationality and nation fields by repurposing the placeholder field to store default values

libs/api/src/lib/features/licensing/licensing.types.ts

@@ -104,6 +104,12 @@ export interface FormFieldConfig {
   label: Bilingual;
   type: FormFieldType;
   required?: boolean;
+  /**
+   * Hint text — except on NATIONALITY/NATION fields, where the builder puts
+   * the pre-selected answer here (`en`, as the English demonym or country
+   * name) and the wizard seeds it into the draft. The server stores it
+   * unchanged either way, so this stays frontend-only.
+   */
   placeholder?: Bilingual;
   helpText?: Bilingual;
   options?: { value: string; label: Bilingual }[];