sync: update from private repo (6fcb0d0)

ui/src/hooks/usePieces.ts

@@ -6,10 +6,15 @@ export function usePieceList() {
   return useQuery({ queryKey: ['pieces'], queryFn: fetchPieces, staleTime: STALE_TIME.SEMI_STATIC });
 }
 
-export function usePiece(name: string | undefined) {
+/**
+ * Fetches a single piece by name (and optional source).
+ * Returns the full PieceFetchResult so callers can use the server-resolved source
+ * for authorization decisions (e.g. read-only gate in PieceEditor).
+ */
+export function usePiece(name: string | undefined, source?: 'builtin' | 'user-custom' | 'global-custom') {
   return useQuery({
-    queryKey: ['piece', name],
-    queryFn: () => fetchPiece(name!),
+    queryKey: ['piece', name, source],
+    queryFn: () => fetchPiece(name!, source),
     enabled: !!name,
     staleTime: STALE_TIME.SEMI_STATIC,
   });