Corrigido erro que quebrava o AdminDashboard por falta do estado actionLoading

src/components/AdminDashboard.tsx

@@ -84,6 +84,7 @@ export default function AdminDashboard({ token, adminUser, onLogout }: AdminDash
   const [isLoading, setIsLoading] = useState(true);
   const [activeCourseId, setActiveCourseId] = useState<string | null>(null);
   const [selectedStudentDetails, setSelectedStudentDetails] = useState<Student | null>(null);
+  const [actionLoading, setActionLoading] = useState<string | null>(null);
 
   // Settings State
   const [settings, setSettings] = useState<any>(null);