backend/src/main/java/com/petshop/backend/controller/AuthController.java

@@ -25,6 +25,7 @@ import org.springframework.security.authentication.InternalAuthenticationService
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -130,6 +131,7 @@ public class AuthController {
         }
     }
 
+    @Transactional(readOnly = true)
     @GetMapping("/me")
     public ResponseEntity<UserInfoResponse> getCurrentUser() {
         User user = getAuthenticatedUser();

backend/src/main/java/com/petshop/backend/entity/Service.java

@@ -30,7 +30,7 @@ public class Service {
     @Column(nullable = false)
     private Integer serviceDuration;
 
-    @ElementCollection
+    @ElementCollection(fetch = FetchType.EAGER)
     @CollectionTable(name = "service_species", joinColumns = @JoinColumn(name = "serviceId"))
     @Column(name = "species", length = 50)
     private Set<String> species = new HashSet<>();

backend/src/main/java/com/petshop/backend/service/RefundService.java

@@ -81,6 +81,7 @@ public class RefundService {
         return toResponse(savedRefund);
     }
 
+    @Transactional(readOnly = true)
     public RefundResponse getRefundById(Long id, Long customerId) {
         Refund refund = refundRepository.findById(id)
                 .orElseThrow(() -> new RuntimeException("Refund not found"));
@@ -92,6 +93,7 @@ public class RefundService {
         return toResponse(refund);
     }
 
+    @Transactional(readOnly = true)
     public List<RefundResponse> getAllRefunds(Long customerId) {
         List<Refund> refunds;
 

backend/src/main/java/com/petshop/backend/service/ServiceService.java

@@ -19,6 +19,7 @@ public class ServiceService {
         this.serviceRepository = serviceRepository;
     }
 
+    @Transactional(readOnly = true)
     public Page<ServiceResponse> getAllServices(String query, Pageable pageable) {
         Page<com.petshop.backend.entity.Service> services;
         if (query != null && !query.trim().isEmpty()) {
@@ -29,6 +30,7 @@ public class ServiceService {
         return services.map(this::mapToResponse);
     }
 
+    @Transactional(readOnly = true)
     public ServiceResponse getServiceById(Long id) {
         com.petshop.backend.entity.Service service = serviceRepository.findById(id)
                 .orElseThrow(() -> new ResourceNotFoundException("Service not found with id: " + id));