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/internal/travel/llm_client.go

@@ -0,0 +1,57 @@
+package travel
+
+import (
+	"context"
+
+	"github.com/gooseek/backend/internal/llm"
+)
+
+type LLMClientAdapter struct {
+	client llm.Client
+}
+
+func NewLLMClientAdapter(client llm.Client) *LLMClientAdapter {
+	return &LLMClientAdapter{client: client}
+}
+
+func (a *LLMClientAdapter) StreamChat(ctx context.Context, messages []ChatMessage, onChunk func(string)) error {
+	llmMessages := make([]llm.Message, len(messages))
+	for i, m := range messages {
+		var role llm.Role
+		switch m.Role {
+		case "system":
+			role = llm.RoleSystem
+		case "user":
+			role = llm.RoleUser
+		case "assistant":
+			role = llm.RoleAssistant
+		default:
+			role = llm.RoleUser
+		}
+		llmMessages[i] = llm.Message{
+			Role:    role,
+			Content: m.Content,
+		}
+	}
+
+	req := llm.StreamRequest{
+		Messages: llmMessages,
+		Options: llm.StreamOptions{
+			MaxTokens:   4096,
+			Temperature: 0.7,
+		},
+	}
+
+	ch, err := a.client.StreamText(ctx, req)
+	if err != nil {
+		return err
+	}
+
+	for chunk := range ch {
+		if chunk.ContentChunk != "" {
+			onChunk(chunk.ContentChunk)
+		}
+	}
+
+	return nil
+}