Use Exist for calendar

main.go

@@ -457,8 +457,9 @@ func prepareDays(repo PagesRepository, t time.Time) []Day {
 }
 
 func pageHasContent(repo PagesRepository, day string) bool {
-	page := repo.Get(day)
-	return page.Blocks.Children != nil
+	return repo.Exist(day)
+	// page := repo.Get(day)
+	// return page.Blocks.Children != nil
 }
 
 func formatWeekPageName(year int, week int) string {