Admin shortcut in the account menu, switched on per study user from /admin; v2.25.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server/routes/study-auth.js

@@ -70,6 +70,9 @@ export function register(app) {
       subscribeNewsletter: user?.subscribeNewsletter !== false,
       studyRemindersEnabled: user?.studyRemindersEnabled === true,
       avatarUrl: user ? getStudyAvatarUrl(user) : '',
+      // Shows an Admin link in the account menu. Only the admin panel can turn this on, and the link
+      // still lands on the admin sign-in, so it grants no access by itself.
+      adminShortcut: user?.adminShortcut === true,
       // Studies the student can open: enrolled ones plus any they have finished
       enrolledStudySlugs: user ? getAccessibleStudySlugs(user) : [],
       completedStudySlugs: Array.isArray(user?.completedStudySlugs) ? user.completedStudySlugs : [],