fix(web): authorities unknown-kind redirect, extract labelText util, EN-required test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/authorities/authorities-page.tsx

@@ -1,37 +1,32 @@
 import { useState, type FormEvent } from "react";
-import { NavLink, useParams } from "react-router-dom";
+import { NavLink, Navigate, useParams } from "react-router-dom";
 import { useTranslation } from "react-i18next";
 
 import type { components } from "../api/schema";
 import { useAuthorities, useCreateAuthority } from "../api/queries";
 import { LabelEditor } from "../components/label-editor";
 import { Button } from "@/components/ui/button";
+import { labelText } from "../lib/labels";
 
 type LabelInput = components["schemas"]["LabelInput"];
-type LabelView = components["schemas"]["LabelView"];
 
 const KINDS = ["person", "organisation", "place"] as const;
 
-function labelText(labels: LabelView[], lang: string): string {
-  return (
-    labels.find((l) => l.lang === lang)?.label ??
-    labels.find((l) => l.lang === "en")?.label ??
-    labels[0]?.label ??
-    ""
-  );
-}
-
 export function AuthoritiesPage() {
   const { t, i18n } = useTranslation();
-  const { kind = "person" } = useParams();
+  const { kind } = useParams();
   const lang = i18n.language.startsWith("sv") ? "sv" : "en";
 
-  const { data: authorities } = useAuthorities(kind);
+  const isValidKind = (KINDS as readonly string[]).includes(kind ?? "");
+
+  const { data: authorities } = useAuthorities(isValidKind ? (kind as string) : "person");
   const create = useCreateAuthority();
 
   const [labels, setLabels] = useState<LabelInput[]>([]);
   const [error, setError] = useState(false);
 
+  if (!isValidKind) return <Navigate to="/authorities/person" replace />;
+
   const onCreate = (event: FormEvent) => {
     event.preventDefault();
 
@@ -42,7 +37,7 @@ export function AuthoritiesPage() {
 
     setError(false);
     create.mutate(
-      { kind, external_uri: null, labels },
+      { kind: kind as string, external_uri: null, labels },
       { onSuccess: () => setLabels([]) },
     );
   };