adjust: improve regency select based on new useRegencies composable to explicit pull all data with no limitation, because it has a province code

app/models/postal-code.ts

@@ -0,0 +1,14 @@
+import { type Base, genBase } from './_base'
+
+export interface PostalCode extends Base {
+  code: string
+  village_code: string
+}
+
+export function genPostalCode(): PostalCode {
+  return {
+    ...genBase(),
+    code: '',
+    village_code: '',
+  }
+}