feat: Replace purpose selection in BillingManager forms with PurposeSelectInput component, streamlining the UI and improving code maintainability by removing hardcoded options.

frontend/src/BillingManager.jsx

@@ -8,6 +8,7 @@ import PageHeader from './components/PageHeader.jsx';
 import PageHeaderActions from './components/PageHeaderActions.jsx';
 import FormField from './components/FormField.jsx';
 import ServerAutocompleteInput from './components/ServerAutocompleteInput.jsx';
+import PurposeSelectInput, { PURPOSES as PURPOSE_OPTIONS } from './components/PurposeSelectInput.jsx';
 import ErrorAlert from './components/ErrorAlert.jsx';
 import { 
   IconPlus, 
@@ -1577,17 +1578,6 @@ function BillingManager() {
 
 // Компоненты форм для модальных окон
 function AddBillingForm({ item, onItemChange, servers }) {
-  const purposeOptions = [
-    { value: '', label: 'Выберите назначение' },
-    { value: 'relay', label: 'Relay VPS' },
-    { value: 'bgp', label: 'BGP сервер' },
-    { value: 'monitoring', label: 'Мониторинг' },
-    { value: 'dns', label: 'DNS сервер' },
-    { value: 'proxy', label: 'Прокси сервер' },
-    { value: 'backup', label: 'Backup сервер' },
-    { value: 'other', label: 'Другое' }
-  ];
-
   const statusOptions = [
     { value: 'active', label: 'Активен' },
     { value: 'inactive', label: 'Неактивен' }
@@ -1635,13 +1625,10 @@ function AddBillingForm({ item, onItemChange, servers }) {
         </div>
       </div>
       <div className="col-md-6">
-        <FormField
-          label="Назначение"
-          name="purpose"
-          type="select"
+        <label className="form-label">Назначение</label>
+        <PurposeSelectInput
           value={item.purpose}
           onChange={(value) => onItemChange({ ...item, purpose: value })}
-          options={purposeOptions}
         />
       </div>
       <div className="col-md-6">
@@ -1731,17 +1718,6 @@ function AddBillingForm({ item, onItemChange, servers }) {
 }
 
 function EditBillingForm({ item, onItemChange, servers }) {
-  const purposeOptions = [
-    { value: '', label: 'Выберите назначение' },
-    { value: 'relay', label: 'Relay VPS' },
-    { value: 'bgp', label: 'BGP сервер' },
-    { value: 'monitoring', label: 'Мониторинг' },
-    { value: 'dns', label: 'DNS сервер' },
-    { value: 'proxy', label: 'Прокси сервер' },
-    { value: 'backup', label: 'Backup сервер' },
-    { value: 'other', label: 'Другое' }
-  ];
-
   const statusOptions = [
     { value: 'active', label: 'Активен' },
     { value: 'inactive', label: 'Неактивен' }
@@ -1789,13 +1765,10 @@ function EditBillingForm({ item, onItemChange, servers }) {
         </div>
       </div>
       <div className="col-md-6">
-        <FormField
-          label="Назначение"
-          name="purpose"
-          type="select"
+        <label className="form-label">Назначение</label>
+        <PurposeSelectInput
           value={item.purpose || ''}
           onChange={(value) => onItemChange({ ...item, purpose: value })}
-          options={purposeOptions}
         />
       </div>
       <div className="col-md-6">

frontend/src/components/PurposeSelectInput.jsx

@@ -0,0 +1,150 @@
+import { useMemo, useRef, useState, useEffect } from 'react';
+import {
+  IconRoute,
+  IconTopologyStar3,
+  IconActivity,
+  IconWorld,
+  IconShield,
+  IconDatabaseExport,
+  IconDots,
+} from '@tabler/icons-react';
+
+const PURPOSES = [
+  {
+    value: 'relay',
+    label: 'Relay VPS',
+    description: 'Трафик/ретрансляция',
+    icon: IconRoute,
+  },
+  {
+    value: 'bgp',
+    label: 'BGP сервер',
+    description: 'Маршрутизация и объявления префиксов',
+    icon: IconTopologyStar3,
+  },
+  {
+    value: 'monitoring',
+    label: 'Мониторинг',
+    description: 'Сбор метрик и алертов',
+    icon: IconActivity,
+  },
+  {
+    value: 'dns',
+    label: 'DNS сервер',
+    description: 'Резолвинг и обслуживание DNS-зон',
+    icon: IconWorld,
+  },
+  {
+    value: 'proxy',
+    label: 'Прокси сервер',
+    description: 'Проксирование HTTP(S)/SOCKS и т.п.',
+    icon: IconShield,
+  },
+  {
+    value: 'backup',
+    label: 'Backup сервер',
+    description: 'Резервные копии и архивы',
+    icon: IconDatabaseExport,
+  },
+  {
+    value: 'other',
+    label: 'Другое',
+    description: 'Свободное назначение',
+    icon: IconDots,
+  },
+];
+
+function PurposeSelectInput({ value, onChange, placeholder = 'Выберите назначение' }) {
+  const containerRef = useRef(null);
+  const [open, setOpen] = useState(false);
+  const [activeIndex, setActiveIndex] = useState(-1);
+
+  const selected = useMemo(
+    () => PURPOSES.find((p) => p.value === value) || null,
+    [value]
+  );
+
+  useEffect(() => {
+    const handler = (e) => {
+      if (!containerRef.current) return;
+      if (!containerRef.current.contains(e.target)) setOpen(false);
+    };
+    document.addEventListener('click', handler);
+    return () => document.removeEventListener('click', handler);
+  }, []);
+
+  const handleSelect = (p) => {
+    onChange(p ? p.value : '');
+    setOpen(false);
+  };
+
+  return (
+    <div ref={containerRef} className="position-relative" style={{ width: '100%' }}>
+      <button
+        type="button"
+        className="form-select text-start d-flex align-items-center"
+        onClick={() => setOpen((prev) => !prev)}
+      >
+        {selected ? (
+          <span className="d-flex align-items-center">
+            <selected.icon size={18} className="me-2 text-primary" />
+            <span>{selected.label}</span>
+          </span>
+        ) : (
+          <span className="text-muted">{placeholder}</span>
+        )}
+      </button>
+
+      {open && (
+        <div
+          className="dropdown-menu show"
+          style={{ display: 'block', width: '100%', maxHeight: 280, overflowY: 'auto' }}
+        >
+          <button
+            type="button"
+            className={`dropdown-item${activeIndex === -1 && !value ? ' active' : ''}`}
+            onMouseDown={(e) => {
+              e.preventDefault();
+              handleSelect(null);
+            }}
+            onMouseEnter={() => setActiveIndex(-1)}
+          >
+            <div className="text-muted small">Без назначения</div>
+          </button>
+          {PURPOSES.map((p, idx) => {
+            const Icon = p.icon;
+            return (
+              <button
+                type="button"
+                key={p.value}
+                className={`dropdown-item${
+                  p.value === value || idx === activeIndex ? ' active' : ''
+                }`}
+                onMouseDown={(e) => {
+                  e.preventDefault();
+                  handleSelect(p);
+                }}
+                onMouseEnter={() => setActiveIndex(idx)}
+              >
+                <div className="d-flex align-items-start">
+                  <span className="avatar me-2 bg-blue-lt text-blue border-0" style={{ width: 24, height: 24 }}>
+                    <Icon size={16} />
+                  </span>
+                  <div className="flex-fill text-start">
+                    <div className="fw-medium">{p.label}</div>
+                    <div className="text-muted small text-truncate">{p.description}</div>
+                  </div>
+                </div>
+              </button>
+            );
+          })}
+        </div>
+      )}
+    </div>
+  );
+}
+
+export { PURPOSES };
+export default PurposeSelectInput;
+
+