New feature:
• You can now change the icons of your subjects. If you already had subjects prior to this, its icon will be set as BookOpen.

Bug fixes:
• added very janky admin endpoints + ui. UI was mostly done by ai because its not public and just needs to work. I made the endpoints myself, even tho they are a bit janky. Will impove in the future..
• added a resend verification link button (only available after 6h) and logout button in the /auth/verify/pending page..