feat: интеграция с VPS Tracker

Исходящий sync bindings после updateConfig, настройки в app_settings, страница Интеграции, приём событий vps_down для DNS failover.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/web/src/queries/app-switcher.ts

@@ -0,0 +1,15 @@
+import { queryOptions } from '@tanstack/react-query'
+import type { AppSwitcherConfig } from '@cfdm/shared'
+import { api } from '@/lib/api-client'
+import { DEFAULT_APP_SWITCHER_CONFIG } from '@/lib/app-switcher-config'
+
+export const appSwitcherQueryKey = ['app-switcher'] as const
+
+export function appSwitcherQueryOptions() {
+  return queryOptions({
+    queryKey: appSwitcherQueryKey,
+    queryFn: () => api.get<AppSwitcherConfig>('/api/v1/settings/app-switcher'),
+    staleTime: 60_000,
+    placeholderData: DEFAULT_APP_SWITCHER_CONFIG,
+  })
+}