Author books API: use a single query with result and count

front/src/SearchBook.vue

@@ -17,7 +17,6 @@
 
   let data = ref(null);
   let error = ref(null);
-  let errorFetchTotal = ref(null);
 
   const pageTotal = computed(() => {
     let countValue = (data.value !== null) ? data.value['count'] : 0;
@@ -33,7 +32,6 @@
       getSearchBooks(data, error, searchTerm, lang, limit, offset.value);
     } else if (authorId != null) {
       getAuthorBooks(data, error, authorId, limit, offset.value);
-      getCountAuthorBooks(totalBooksData, errorFetchTotal, searchTerm);
     }
   }