ENCOA-180: Prevented users from checking their results if not released yet

src/components/Medium/StatGridItem.tsx

@@ -277,7 +277,11 @@ const StatsGridItem: React.FC<StatsGridItemProps> = ({
 						selectedTrainingExams.some((exam) => exam.includes(timestamp)) &&
 						"border-2 border-slate-600",
 				)}
-				onClick={examNumber === undefined ? selectExam : undefined}
+				onClick={() => {
+					if (!!assignment && !assignment.released) return;
+					if (examNumber === undefined) return selectExam();
+					return;
+				}}
 				style={{
 					...(width !== undefined && {width}),
 					...(height !== undefined && {height}),