fix product search matching descriptions

backend/src/main/java/com/petshop/backend/repository/ProductRepository.java

@@ -23,7 +23,7 @@ public interface ProductRepository extends JpaRepository<Product, Long> {
     boolean existsByProdNameIgnoreCaseAndProdIdNot(String prodName, Long prodId);
 
     @Query("SELECT p FROM Product p WHERE " +
-           "(:q IS NULL OR LOWER(p.prodName) LIKE LOWER(CONCAT('%', :q, '%')) OR LOWER(COALESCE(p.prodDesc, '')) LIKE LOWER(CONCAT('%', :q, '%'))) AND " +
+           "(:q IS NULL OR LOWER(p.prodName) LIKE LOWER(CONCAT('%', :q, '%')) OR LOWER(p.category.categoryName) LIKE LOWER(CONCAT('%', :q, '%'))) AND " +
            "(:categoryId IS NULL OR p.category.categoryId = :categoryId)")
     Page<Product> searchProducts(@Param("q") String query, @Param("categoryId") Long categoryId, Pageable pageable);
 }