Chapter titles are... Not my favorite things, to be honest. It's hard to make them pithy and punchy, they have to explain what the chapter will be about and yet grab the reader's attention, and they have to be written before the chapter itself, even though the chapter will probably diverge from what you thought it was going to be when you were first writing it before it is done. I don't have a solution for all of those problems but I have a suggestion that can help with two of them, have the text recognizer parse all basic CHYOA Markdown Syntax in chapter titles (and questions) as it would if it were in the chapter body. By "basic" I mean Bold, Italic, Underscore, and Strikethrough in addition to the existing user-controlled variables. Why am I not suggesting including other content like images and so forth? For one thing, it would increase server load massively, for another thing, it is too open to abuse.
In the chapter, the (whole) title is already bold. On the story map, chapters are links and thus underlined if you hover over them. Additionally, bold might overly emphasize them on the story map. Strikethrough might be a very interesting option which actually adds another option for storytelling purposes. Italics might be fine as well. Only cover images are hosted on the site itself and thus affect the server/CDN. (Well, if you take a look at titles of TV series episodes... they often don't say much and you will only understand toward the end of the episode. So depending on the type of story, they can be mysterious (and quite short) but true. Other ways of storytelling (2nd person) might not say much of what happens in the chapter as well as it only describes the protagonist's next action which results in the following events/reactions.)
