feat(web): single-language content authoring (LabelEditor + localized_text at default lang)

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

web/src/components/label-editor.tsx

@@ -1,12 +1,15 @@
 import { useTranslation } from "react-i18next";
 
 import type { components } from "../api/schema";
+import { useConfig } from "../config/config-context";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 
 type LabelInput = components["schemas"]["LabelInput"];
 
-/** Controlled sv/en label editor. Emits LabelInput[] with only the non-empty langs. */
+/** Single-language label editor. Authors one label at the instance default language;
+ *  emits a one-entry LabelInput[] (empty array when blank). The multilingual data model
+ *  is unchanged — this only simplifies authoring. */
 export function LabelEditor({
   value,
   onChange,
@@ -15,33 +18,18 @@ export function LabelEditor({
   onChange: (labels: LabelInput[]) => void;
 }) {
   const { t } = useTranslation();
+  const { default_language } = useConfig();
 
-  const valueFor = (lang: string) => value.find((l) => l.lang === lang)?.label ?? "";
+  const current =
+    value.find((l) => l.lang === default_language)?.label ?? value[0]?.label ?? "";
 
-  const set = (lang: string, label: string) => {
-    const others = value.filter((l) => l.lang !== lang);
-
-    onChange(label.trim() ? [...others, { lang, label }] : others);
-  };
+  const set = (label: string) =>
+    onChange(label.trim() ? [{ lang: default_language, label }] : []);
 
   return (
-    <div className="space-y-2">
-      <div className="space-y-1">
-        <Label htmlFor="label-en">{t("labels.en")}</Label>
-        <Input
-          id="label-en"
-          value={valueFor("en")}
-          onChange={(e) => set("en", e.target.value)}
-        />
-      </div>
-      <div className="space-y-1">
-        <Label htmlFor="label-sv">{t("labels.sv")}</Label>
-        <Input
-          id="label-sv"
-          value={valueFor("sv")}
-          onChange={(e) => set("sv", e.target.value)}
-        />
-      </div>
+    <div className="space-y-1">
+      <Label htmlFor="label">{t("labels.label")}</Label>
+      <Input id="label" value={current} onChange={(e) => set(e.target.value)} />
     </div>
   );
 }