Add support for "local" branding
I suppose there could be confusion whether students are using the local NUC-based arsnova.click, or the official version on the Internet, especially with a larger audience. An easy-to-see feature on the front page should help in differentiating the two versions. The teacher might say
If you see a
🦄 in the upper left corner, you are using the right version.
I suggest this feature should be visible at all times.