update Markdown skills

src/lib/krowHooks.js

@@ -42,13 +42,21 @@ export function usePreferences() {
   return { ...base44.auth.preferences(), ...(user?.preferences || {}) };
 }
 
-/** Writes one or more preferences and refreshes every consumer of `['user']`. */
+/**
+ * Writes one or more preferences and refreshes every consumer of `['user']`.
+ *
+ * The mutation resolves to `{ user, persisted, error }`, not to the user — a
+ * caller storing something it needs back after a reload, which is every caller
+ * writing `customSkills`, has to be able to tell a write that landed from one
+ * the browser refused. The cache is updated either way: the change is real for
+ * this session even when it could not be stored.
+ */
 export function useUpdatePreferences() {
   const queryClient = useQueryClient();
   return useMutation({
     mutationFn: /** @param {any} patch */ (patch) => base44.auth.updatePreferences(patch),
-    onSuccess: (user) => {
-      queryClient.setQueryData(['user'], user);
+    onSuccess: /** @param {any} result */ (result) => {
+      queryClient.setQueryData(['user'], result.user);
       queryClient.invalidateQueries({ queryKey: ['user'] });
     },
   });