feat: add Gin HTTP API with SSE streaming chat

main.go

@@ -1,18 +1,44 @@
 package main
 
 import (
-	"fmt"
+	"context"
 	"log"
 
 	"eino-test/config"
+	"eino-test/internal/agent"
+	"eino-test/internal/api"
+	"eino-test/internal/embedding"
+	"eino-test/internal/index"
+	"eino-test/internal/rag"
 	"eino-test/internal/store"
 )
 
 func main() {
 	cfg := config.Load()
-	noteStore := store.NewMemoryNoteStore()
-	_ = noteStore
+	ctx := context.Background()
 
-	log.Printf("Server starting on port %s (data dir: %s)", cfg.Port, cfg.DataDir)
-	fmt.Println("Knowledge Assistant ready")
+	noteStore := store.NewMemoryNoteStore()
+	embedder, err := embedding.NewEmbedder(ctx, cfg.OpenAIAPIKey, cfg.OpenAIBaseURL, cfg.OpenAIEmbedModel)
+	if err != nil {
+		log.Fatalf("Failed to create embedder: %v", err)
+	}
+
+	vectorIdx := index.NewInMemoryVectorIndex()
+	pipeline := rag.NewRAGPipeline(noteStore, embedder, vectorIdx)
+
+	if err := pipeline.IndexAllFromDir(ctx, cfg.DataDir); err != nil {
+		log.Printf("Warning: failed to index notes: %v", err)
+	}
+
+	supervisorAgent, err := agent.NewSupervisorAgent(ctx, cfg, pipeline)
+	if err != nil {
+		log.Fatalf("Failed to create supervisor agent: %v", err)
+	}
+
+	router := api.NewRouter(cfg, pipeline, supervisorAgent)
+
+	log.Printf("Server starting on port %s", cfg.Port)
+	if err := router.Run(":" + cfg.Port); err != nil {
+		log.Fatalf("Failed to start server: %v", err)
+	}
 }