feat: 依据 LLM 参数实例化 client

backend/internal/llm/client.go

@@ -0,0 +1,29 @@
+package llm
+
+import (
+	"fmt"
+	"knowledge-graph-backend/internal/config"
+
+	"github.com/tmc/langchaingo/llms"
+	"github.com/tmc/langchaingo/llms/openai"
+)
+
+type Client struct {
+	llm llms.Model
+	config config.LLMConfig
+}
+
+// 创建 LLM 实例
+func NewClient(cfg config.LLMConfig) (*Client, error) {
+	model, err := openai.New(
+		openai.WithToken(cfg.APIKey),
+		openai.WithBaseURL(cfg.BaseURL),
+		openai.WithModel(cfg.Model),
+	)
+
+	if err != nil {
+        return nil, fmt.Errorf("failed to create llm client: %w", err)
+    }
+
+	return &Client{config: cfg, llm: model}, nil
+}