Show couple state in basic family tree

geneit_app/src/api/CoupleApi.ts

@@ -1,5 +1,6 @@
 import { APIClient } from "./ApiClient";
 import { DateValue, Member } from "./MemberApi";
+import { ServerApi } from "./ServerApi";
 
 interface CoupleApiInterface {
   id: number;
@@ -103,6 +104,13 @@ export class Couple implements CoupleApiInterface {
   otherPersonID(id: number): number | undefined {
     return id === this.wife ? this.husband : this.wife;
   }
+
+  get stateFr(): string {
+    return (
+      ServerApi.Config.couples_states.find((c) => c.code === this.state)?.fr ??
+      ""
+    );
+  }
 }
 
 export class CouplesList {