Prevent reader progressbar tap highlighting on mobile

src/features/reader/overlay/progress-bar/components/ReaderProgressBarContainer.tsx

@@ -35,4 +35,5 @@ export const ReaderProgressBarContainer = styled(Stack, {
     ...applyStyles(getProgressBarPositionInfo(progressBarPosition).isRight, {
         alignItems: theme.direction === 'ltr' ? 'flex-end' : 'flex-start',
     }),
+    WebkitTapHighlightColor: 'transparent',
 }));

src/features/reader/overlay/progress-bar/components/ReaderProgressBarPageNumber.tsx

@@ -18,4 +18,5 @@ export const ReaderProgressBarPageNumber = styled(Typography)({
     textAlign: 'center',
     userSelect: 'none',
     cursor: 'pointer',
+    WebkitTapHighlightColor: 'transparent',
 });