feat: enhance setup process with SMTP configuration and token generation

fix: require authentication for certain routes and improve exam data handling
chore: update .gitignore to include additional database files

frontend/src/components/SetupWizard.tsx

@@ -274,7 +274,6 @@ export default function SetupWizard({ onComplete }: Readonly<Props>) {
                 value={appUrl}
                 onChange={(e) => setAppUrl(e.target.value)}
                 placeholder="https://brainwave.example.com"
-                required
               />
             </div>