fix(llm): 增强API错误处理以包含原始响应信息

改进所有LLM适配器的错误处理逻辑，现在会捕获并传递API原始响应信息
添加对账户余额不足等特定错误类型的识别和处理
统一各适配器的错误响应格式，包含错误代码和消息

backend/app/services/llm/adapters/baidu_adapter.py

@@ -75,7 +75,8 @@ class BaiduAdapter(BaseLLMAdapter):
             await self.validate_config()
             return await self.retry(lambda: self._send_request(request))
         except Exception as error:
-            self.handle_error(error, "百度文心一言 API调用失败")
+            api_response = getattr(error, 'api_response', None)
+            self.handle_error(error, "百度文心一言 API调用失败", api_response=api_response)
     
     async def _send_request(self, request: LLMRequest) -> LLMResponse:
         """发送请求"""
@@ -107,12 +108,19 @@ class BaiduAdapter(BaseLLMAdapter):
         if response.status_code != 200:
             error_data = response.json() if response.text else {}
             error_msg = error_data.get("error_msg", f"HTTP {response.status_code}")
-            raise Exception(f"{error_msg}")
+            error_code = error_data.get("error_code", "")
+            api_response = f"[{error_code}] {error_msg}" if error_code else error_msg
+            err = LLMError(error_msg, self.config.provider, response.status_code, api_response=api_response)
+            raise err
 
         data = response.json()
 
         if "error_code" in data:
-            raise Exception(f"百度API错误: {data.get('error_msg', '未知错误')}")
+            error_msg = data.get('error_msg', '未知错误')
+            error_code = data.get('error_code', '')
+            api_response = f"[{error_code}] {error_msg}"
+            err = LLMError(f"百度API错误: {error_msg}", self.config.provider, api_response=api_response)
+            raise err
         
         usage = None
         if "usage" in data:

backend/app/services/llm/adapters/doubao_adapter.py

@@ -22,7 +22,8 @@ class DoubaoAdapter(BaseLLMAdapter):
             await self.validate_config()
             return await self.retry(lambda: self._send_request(request))
         except Exception as error:
-            self.handle_error(error, "豆包 API调用失败")
+            api_response = getattr(error, 'api_response', None)
+            self.handle_error(error, "豆包 API调用失败", api_response=api_response)
     
     async def _send_request(self, request: LLMRequest) -> LLMResponse:
         """发送请求"""
@@ -50,8 +51,12 @@ class DoubaoAdapter(BaseLLMAdapter):
         
         if response.status_code != 200:
             error_data = response.json() if response.text else {}
-            error_msg = error_data.get("error", {}).get("message", f"HTTP {response.status_code}")
+            error_obj = error_data.get("error", {})
-            raise Exception(f"{error_msg}")
+            error_msg = error_obj.get("message", f"HTTP {response.status_code}")
+            error_code = error_obj.get("code", "")
+            api_response = f"[{error_code}] {error_msg}" if error_code else error_msg
+            err = LLMError(error_msg, self.config.provider, response.status_code, api_response=api_response)
+            raise err
         
         data = response.json()
         choice = data.get("choices", [{}])[0]

backend/app/services/llm/adapters/minimax_adapter.py

@@ -19,7 +19,8 @@ class MinimaxAdapter(BaseLLMAdapter):
             await self.validate_config()
             return await self.retry(lambda: self._send_request(request))
         except Exception as error:
-            self.handle_error(error, "MiniMax API调用失败")
+            api_response = getattr(error, 'api_response', None)
+            self.handle_error(error, "MiniMax API调用失败", api_response=api_response)
     
     async def _send_request(self, request: LLMRequest) -> LLMResponse:
         """发送请求"""
@@ -47,15 +48,23 @@ class MinimaxAdapter(BaseLLMAdapter):
         
         if response.status_code != 200:
             error_data = response.json() if response.text else {}
-            error_msg = error_data.get("base_resp", {}).get("status_msg", f"HTTP {response.status_code}")
+            base_resp = error_data.get("base_resp", {})
-            raise Exception(f"{error_msg}")
+            error_msg = base_resp.get("status_msg", f"HTTP {response.status_code}")
+            error_code = base_resp.get("status_code", "")
+            api_response = f"[{error_code}] {error_msg}" if error_code else error_msg
+            err = LLMError(error_msg, self.config.provider, response.status_code, api_response=api_response)
+            raise err
 
         data = response.json()
 
         # MiniMax 特殊的错误处理
-        if data.get("base_resp", {}).get("status_code") != 0:
+        base_resp = data.get("base_resp", {})
-            error_msg = data.get("base_resp", {}).get("status_msg", "未知错误")
+        if base_resp.get("status_code") != 0:
-            raise Exception(f"MiniMax API错误: {error_msg}")
+            error_msg = base_resp.get("status_msg", "未知错误")
+            error_code = base_resp.get("status_code", "")
+            api_response = f"[{error_code}] {error_msg}"
+            err = LLMError(f"MiniMax API错误: {error_msg}", self.config.provider, api_response=api_response)
+            raise err
         
         choice = data.get("choices", [{}])[0]
         

backend/app/services/llm/base_adapter.py

@@ -57,17 +57,30 @@ class BaseLLMAdapter(ABC):
                 self.config.provider
             )
     
-    def handle_error(self, error: Any, context: str = "") -> None:
+    def handle_error(self, error: Any, context: str = "", api_response: str = None) -> None:
-        """处理API错误"""
+        """处理API错误
+
+        Args:
+            error: 原始异常
+            context: 错误上下文描述
+            api_response: API 服务器返回的原始响应信息
+        """
         message = str(error)
         status_code = getattr(error, 'status_code', None)
 
+        # 如果错误本身已经有 api_response，优先使用
+        if api_response is None:
+            api_response = getattr(error, 'api_response', None)
+
         # 针对不同错误类型提供更详细的信息
         if "超时" in message or "timeout" in message.lower():
             message = f"请求超时 ({self.config.timeout}s)。建议：\n" \
                      f"1. 检查网络连接是否正常\n" \
                      f"2. 尝试增加超时时间\n" \
                      f"3. 验证API端点是否正确"
+        elif any(keyword in message for keyword in ["余额不足", "资源包", "充值", "quota", "insufficient", "balance"]):
+            message = f"账户余额不足或配额已用尽，请充值后重试"
+            status_code = status_code or 402
         elif status_code == 401 or status_code == 403:
             message = f"API认证失败。建议：\n" \
                      f"1. 检查API Key是否正确配置\n" \
@@ -90,7 +103,8 @@ class BaseLLMAdapter(ABC):
             full_message,
             self.config.provider,
             status_code,
-            error
+            error,
+            api_response=api_response
         )
     
     async def retry(self, fn, max_attempts: int = 3, delay: float = 1.0) -> Any: