fix(layout): make horizontal scroll bar visible in fixed-layout EPUB, closes #3506 (#3512)

And fix some text not shown in fixed-layout EPUB.

apps/readest-app/src/app/reader/components/FoliateViewer.tsx

@@ -159,6 +159,7 @@ const FoliateViewer: React.FC<{
               viewSettings,
               width,
               height,
+              isFixedLayout: bookData.isFixedLayout,
               primaryLanguage: bookData.book?.primaryLanguage,
               userLocale: getLocale(),
               content: data,

apps/readest-app/src/app/reader/components/annotator/Annotator.tsx

@@ -175,6 +175,7 @@ const Annotator: React.FC<{ bookKey: string }> = ({ bookKey }) => {
       viewSettings: getViewSettings(bookKey)!,
       userLocale: getLocale(),
       content: '',
+      isFixedLayout: bookData.isFixedLayout,
       transformers: ['punctuation'],
       reversePunctuationTransform: true,
     }),