feat: travel service with 2GIS routing, POI, hotels + finance providers + UI overhaul

- Add travel-svc microservice (Amadeus, TravelPayouts, 2GIS, OpenRouteService)
- Add travel orchestrator with parallel collectors (events, POI, hotels, flights)
- Add 2GIS road routing with transport cost calculation (car/bus/taxi)
- Add TravelMap (2GIS MapGL) and TravelWidgets components
- Add useTravelChat hook for streaming travel agent responses
- Add finance heatmap providers refactor
- Add SearXNG settings, API proxy routes, Docker compose updates
- Update Dockerfiles, config, types, and all UI pages for consistency

Made-with: Cursor

backend/webui/src/components/settings/BillingTab.tsx

@@ -55,7 +55,7 @@ const plans: Plan[] = [
     price: 4990,
     priceMonthly: 4990,
     icon: Building2,
-    color: 'text-amber-400',
+    color: 'text-amber-600',
     features: ['Всё из Pro', 'Безлимитный AI', 'Приоритетная поддержка', 'Команды', 'SLA 99.9%'],
     limits: {
       apiRequests: '100,000/день',