refactor(tests): update package.json scripts for linting and testing; enhance CI workflows for linting and testing integration

frontend/src/BillingManager.jsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useRef } from 'react';
+import { useState, useEffect } from 'react';
 import api from './lib/api.js';
 import axios from 'axios';
 import FormModal from './components/FormModal.jsx';
@@ -51,7 +51,7 @@ function BillingManager() {
   const [currentPage, setCurrentPage] = useState(1);
   const [sortField, setSortField] = useState('nextPaymentDate');
   const [sortOrder, setSortOrder] = useState('asc');
-  const [filterStatus, setFilterStatus] = useState('');
+  const [filterStatus, _setFilterStatus] = useState('');
   const [filterUrgency, setFilterUrgency] = useState('');
   const [viewMode, setViewMode] = useState('cards'); // 'cards' | 'table'
   const [activeTab, setActiveTab] = useState('subscriptions'); // 'subscriptions' | 'payments'
@@ -76,14 +76,14 @@ function BillingManager() {
   const [editingPayment, setEditingPayment] = useState(null);
   const [showDeletePaymentModal, setShowDeletePaymentModal] = useState(false);
   const [paymentToDelete, setPaymentToDelete] = useState(null);
-  const [futureDateConfirm, setFutureDateConfirm] = useState(false);
+  const [_futureDateConfirm, _setFutureDateConfirm] = useState(false);
 
   // История платежей
-  const [paymentSearchTerm, setPaymentSearchTerm] = useState('');
-  const [paymentSortField, setPaymentSortField] = useState('date');
-  const [paymentSortOrder, setPaymentSortOrder] = useState('desc');
-  const [selectedPayments, setSelectedPayments] = useState(new Set());
-  const [paymentPage, setPaymentPage] = useState(1);
+  const [paymentSearchTerm, _setPaymentSearchTerm] = useState('');
+  const [_paymentSortField, _setPaymentSortField] = useState('date');
+  const [_paymentSortOrder, _setPaymentSortOrder] = useState('desc');
+  const [_selectedPayments, _setSelectedPayments] = useState(new Set());
+  const [_paymentPage, _setPaymentPage] = useState(1);
   const paymentPageSize = 10;
 
   // Курсы валют
@@ -92,7 +92,7 @@ function BillingManager() {
     EUR: 1,
     RUB: 1
   });
-  const [ratesLoading, setRatesLoading] = useState(false);
+  const [_ratesLoading, setRatesLoading] = useState(false);
 
   // Новый элемент
   const [newItem, setNewItem] = useState({
@@ -273,7 +273,7 @@ function BillingManager() {
     setLoading(true);
     try {
       // Убираем служебное поле _external перед сохранением
-      const payload = billingData.map(({ _external, ...rest }) => rest);
+      const payload = billingData.map(({ _external: _ext, ...rest }) => rest);
       await api.post(`/billing`, { domains: payload });
       // После сохранения снимаем флаг _external со всех записей
       setBillingData(prev => prev.map(item => ({ ...item, _external: false })));