refactor: 重构llm包

backend/internal/llm/client_test.go

@@ -30,10 +30,10 @@ func TestNewClient(t *testing.T) {
 	log.Printf("[INFO] client instance is non-nil, validation passed")
 
 	// 验证 llm 实例被成功创建（不调用，只检查非 nil）
-	if client.llm == nil {
-		t.Error("client.llm is nil, expected a non-nil llms.Model")
+	if client.model == nil {
+		t.Error("client.model is nil, expected a non-nil llms.Model")
 	} else {
-		log.Printf("[INFO] client.llm is non-nil, llms.Model created successfully")
+		log.Printf("[INFO] client.model is non-nil, llms.Model created successfully")
 	}
 
 	log.Printf("[INFO] TestNewClient completed successfully")
@@ -69,7 +69,7 @@ func TestClient_Chat(t *testing.T) {
 	// 3. 调用被测方法
 	log.Printf("[INFO] calling client.Chat()...")
 	got, err := client.Chat(context.Background(), messages)
-	
+
 	// 4. 校验结果
 	if err != nil {
 		log.Printf("[ERROR] Chat() returned error: %v", err)
@@ -125,7 +125,7 @@ func TestClient_ChatWithSystemPrompt(t *testing.T) {
 	// 4. 调用被测方法
 	log.Printf("[INFO] calling client.ChatWithSystemPrompt()...")
 	got, err := client.ChatWithSystemPrompt(context.Background(), systemPrompt, messages)
-	
+
 	// 5. 校验结果
 	if err != nil {
 		log.Printf("[ERROR] ChatWithSystemPrompt() returned error: %v", err)
@@ -147,4 +147,4 @@ func TestClient_ChatWithSystemPrompt(t *testing.T) {
 	}
 
 	log.Printf("[INFO] TestClient_ChatWithSystemPrompt completed successfully")
-}
+}