Every source card opens, and the chapter page is simpler

Hovering a source chip in a chapter now opens its card wherever you are in the lesson; before, chips further down the page opened their card off screen. The card lists every source the chapter was written from, videos included, and works from the keyboard. "Report a problem" at its foot flags a broken, paywalled or out-of-date source, and a saved report offers to rewrite the chapter without it. Because the cards now do its job, the chapter page drops its Sources tab. Loading screens show only what is being prepared and its steps, and the reviews on the home page show each reviewer's photo when they have one.