refactor(FilterManager): replace API call with listCommunities utility for community data retrieval

- Updated the community data fetching logic in FilterManager to utilize the listCommunities function, improving code clarity and maintainability.
- Ensured proper handling of aborted requests to prevent unnecessary state updates.

Made-with: Cursor

frontend/src/FilterManager.jsx

@@ -47,6 +47,7 @@ import {
 import { CSS } from '@dnd-kit/utilities';
 import { normalizeGateways, countryToFlag } from './utils/serverUtils.js';
 import { usePing } from './contexts/PingContext.jsx';
+import { listCommunities } from './lib/evobgpData.js';
 
 // Компонент автокомплита для выбора Community
 function CommunityAutocomplete({ label, value, onChange, communities = [], required = false, placeholder = 'Введите или выберите community...', baseAS = '65001' }) {
@@ -911,10 +912,11 @@ function FilterManager() {
 
     (async () => {
       try {
-        const res = await api.get(`/communities`, opts);
-        setCommunities(Array.isArray(res.data) ? res.data : []);
+        const rows = await listCommunities();
+        if (signal.aborted) return;
+        setCommunities(Array.isArray(rows) ? rows : []);
       } catch (e) {
-        if (e?.name === 'CanceledError' || e?.name === 'AbortError' || e?.code === 'ERR_CANCELED') return;
+        if (signal.aborted) return;
       }
     })();