Bug fixA batch of display and input fixes
Fixed iOS modal collapse, small-screen clipping, the quiz report form, LINE sign-in, and more.
We fixed modals collapsing into a title-only strip on iOS, lesson dialogs getting cut off on small Android screens, and the quiz play table shrinking too much on compact devices.
Also fixed: the quiz report modal's detail field not accepting input, LINE sign-in failing when no email address was available, blog text being hard to read in dark mode, and blog cover images not displaying.