feat: Agent 服务日志功能和后端更新

- agent/main.py: 添加日志记录功能
- agent/llm: 更新 anthropic, openai, factory
- agent/core/agent.py: 更新
- server: agent_handler, agent_service, chat_service 更新

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/internal/service/agent_service.go

@@ -5,16 +5,24 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"time"
+
+	"x-agents/server/internal/repository"
 )
 
 // AgentChatRequest Python Agent 对话请求
 type AgentChatRequest struct {
-	AgentID   int    `json:"agent_id"`
-	Message   string `json:"message"`
-	UserID    int    `json:"user_id"`
-	SessionID string `json:"session_id,omitempty"`
+	AgentID        int    `json:"agent_id"`
+	Message        string `json:"message"`
+	UserID         int    `json:"user_id"`
+	SessionID      string `json:"session_id,omitempty"`
+	ModelID        string `json:"model_id,omitempty"`
+	ModelName      string `json:"model_name,omitempty"`
+	ModelProvider  string `json:"model_provider,omitempty"`
+	APIKey         string `json:"api_key,omitempty"`
+	BaseURL        string `json:"base_url,omitempty"`
 }
 
 // AgentChatResponse Python Agent 对话响应
@@ -51,20 +59,55 @@ type TeamChatResponse struct {
 type AgentService struct {
 	pythonURL string
 	client    *http.Client
+	modelRepo *repository.ModelRepository
 }
 
 // NewAgentService 创建 Agent 服务
-func NewAgentService(pythonURL string) *AgentService {
+func NewAgentService(pythonURL string, modelRepo *repository.ModelRepository) *AgentService {
 	return &AgentService{
 		pythonURL: pythonURL,
 		client: &http.Client{
 			Timeout: 120 * time.Second, // Agent 可能需要较长时间
 		},
+		modelRepo: modelRepo,
 	}
 }
 
 // Chat 单智能体对话
 func (s *AgentService) Chat(req AgentChatRequest) (*AgentChatResponse, error) {
+	// 如果传入了 model_id，查询模型配置获取 api_key 和 base_url
+	log.Printf("[AgentService] Chat called, model_id: %s, modelRepo: %v", req.ModelID, s.modelRepo != nil)
+
+	if req.ModelID != "" && s.modelRepo != nil {
+		model, err := s.modelRepo.FindByID(req.ModelID)
+		if err != nil {
+			log.Printf("[AgentService] Error finding model: %v", err)
+		} else if model != nil {
+			log.Printf("[AgentService] Found model: id=%s, provider=%s, model=%s, base_url=%s, api_key_len=%d",
+				model.ID, model.Provider, model.Model, model.BaseURL, len(model.APIKey))
+			req.APIKey = model.APIKey
+			req.BaseURL = model.BaseURL
+			req.ModelProvider = model.Provider
+			req.ModelName = model.Model
+			log.Printf("[AgentService] Set req.APIKey=%s, req.BaseURL=%s", req.APIKey[:10]+"...", req.BaseURL)
+		} else {
+			log.Printf("[AgentService] Model not found for id: %s", req.ModelID)
+		}
+	} else if s.modelRepo == nil {
+		log.Printf("[AgentService] WARNING: modelRepo is nil!")
+	}
+
+	// 打印传给 Python 的请求内容
+	apiKeyPreview := ""
+	if req.APIKey != "" {
+		apiKeyPreview = req.APIKey
+		if len(apiKeyPreview) > 10 {
+			apiKeyPreview = apiKeyPreview[:10] + "..."
+		}
+	}
+	log.Printf("[AgentService] Sending to Python: model_id=%s, api_key=%s, base_url=%s, provider=%s, model=%s",
+		req.ModelID, apiKeyPreview, req.BaseURL, req.ModelProvider, req.ModelName)
+
 	url := fmt.Sprintf("%s/agent/chat", s.pythonURL)
 
 	jsonData, err := json.Marshal(req)