sticky qrcode

src/pages/lesson-details.tsx

@@ -278,6 +278,9 @@ const LessonDetail = () => {
             borderRadius="xl" 
             bg={colorMode === "light" ? "gray.50" : "gray.700"}
             boxShadow="md"
+            position="sticky"
+            top="20px"
+            zIndex="2"
           ><Box pb={3}>
           {formatDate(accessCode?.body?.lesson?.date, t('journal.pl.lesson.dateFormat'))}{' '}
           {t('journal.pl.common.marked')} -