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/pkg/config/config.go

@@ -45,6 +45,11 @@ type Config struct {
 	ComputerSvcURL      string
 	FinanceHeatmapURL   string
 	LearningSvcURL      string
+	TravelSvcURL        string
+
+	// TravelPayouts
+	TravelPayoutsToken  string
+	TravelPayoutsMarker string
 
 	// MinIO / S3 storage
 	MinioEndpoint  string
@@ -124,6 +129,10 @@ func Load() (*Config, error) {
 		ComputerSvcURL:      getEnv("COMPUTER_SVC_URL", "http://localhost:3030"),
 		FinanceHeatmapURL:   getEnv("FINANCE_HEATMAP_SVC_URL", "http://localhost:3033"),
 		LearningSvcURL:      getEnv("LEARNING_SVC_URL", "http://localhost:3034"),
+		TravelSvcURL:        getEnv("TRAVEL_SVC_URL", "http://localhost:3035"),
+
+		TravelPayoutsToken:  getEnv("TRAVELPAYOUTS_TOKEN", ""),
+		TravelPayoutsMarker: getEnv("TRAVELPAYOUTS_MARKER", ""),
 
 		MinioEndpoint:  getEnv("MINIO_ENDPOINT", "minio:9000"),
 		MinioAccessKey: getEnv("MINIO_ACCESS_KEY", "minioadmin"),