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

frontend/src/CommunitiesManager.jsx

@@ -190,7 +190,7 @@ function CommunitiesManager() {
     setLoading(true);
     try {
       // не отправляем служебное поле _external
-      const payload = data.map(({ _external, ...rest }) => rest);
+      const payload = data.map(({ _external: _, ...rest }) => rest);
       await api.post(`/communities`, { communities: payload });
       setSuccess('Справочник сохранён!');
       setTimeout(() => setSuccess(''), 3000);
@@ -302,7 +302,7 @@ function CommunitiesManager() {
         });
         return Array.from(map.values());
       });
-    } catch (e) {
+    } catch (_e) {
       setError('Неверный JSON.');
     }
   };