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/next.config.mjs

@@ -4,15 +4,7 @@ const nextConfig = {
   reactStrictMode: true,
   env: {
     API_URL: process.env.API_URL || 'http://localhost:3015',
-  },
-  async rewrites() {
-    const apiUrl = process.env.API_URL || 'http://localhost:3015';
-    return [
-      {
-        source: '/api/:path*',
-        destination: `${apiUrl}/api/:path*`,
-      },
-    ];
+    NEXT_PUBLIC_TWOGIS_API_KEY: process.env.NEXT_PUBLIC_TWOGIS_API_KEY || process.env.TWOGIS_API_KEY || '',
   },
 };