fix: annotate effectiveRelated type in DetailView to fix TS2339 errors for api/columns properties

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/plugin-detail/src/DetailView.tsx

@@ -319,7 +319,7 @@ export const DetailView: React.FC<DetailViewProps> = ({
   }, [schema.autoDiscoverRelated, schema.related, objectSchema]);
 
   // Merge explicit and auto-discovered related lists
-  const effectiveRelated = React.useMemo(() => {
+  const effectiveRelated: NonNullable<DetailViewSchema['related']> = React.useMemo(() => {
     if (schema.related && schema.related.length > 0) return schema.related;
     return discoveredRelated.map((r) => ({
       title: r.title,