feat(36-02): add conditional Admin link to UserMenu for admin users

src/client/components/UserMenu.tsx

@@ -45,6 +45,20 @@ export function UserMenu() {
 			</button>
 			{open && (
 				<div className="absolute right-0 mt-1 w-40 bg-white rounded-lg shadow-lg border border-gray-200 py-1 z-50">
+					{/* Admin link — only visible to admin users */}
+					{auth?.user?.isAdmin && (
+						<>
+							<Link
+								to="/admin"
+								onClick={() => setOpen(false)}
+								className="flex items-center gap-2 px-3 py-2 text-sm text-gray-700 hover:bg-gray-50 transition-colors"
+							>
+								<LucideIcon name="shield" size={16} className="text-gray-400" />
+								Admin
+							</Link>
+							<div className="border-t border-gray-100 my-1" />
+						</>
+					)}
 					<Link
 						to="/profile"
 						onClick={() => setOpen(false)}