Show error for chapter without pages

public/locales/en.json

@@ -734,6 +734,7 @@
     "error": {
       "label": {
         "next_chapter_does_not_exist": "There is no next chapter to open",
+        "no_pages_found": "No pages found",
         "prev_chapter_does_not_exist": "There is no previous chapter to open"
       }
     },

src/screens/Reader.tsx

@@ -503,6 +503,10 @@ export function Reader() {
         );
     }
 
+    if (!chapter.pageCount) {
+        return <EmptyViewAbsoluteCentered message={t('reader.error.label.no_pages_found')} retry={doFetchPages} />;
+    }
+
     const pages = range(chapter.pageCount).map((index) => ({
         index,
         src: requestManager.getChapterPageUrl(mangaId, chapterIndex, index),