refactor: 修改模型检查逻辑以提高代码可读性

app/services/openai_chat_service.py

@@ -63,6 +63,7 @@ class OpenAIChatService:
         while retries < max_retries:
             try:
                 async for line in self.api_client.stream_generate_content(payload, model, api_key):
+                    # print(line)
                     if line.startswith("data:"):
                         chunk = json.loads(line[6:])
                         openai_chunk = self.response_handler.handle_response(
@@ -127,7 +128,7 @@ class OpenAIChatService:
         
     def _get_safety_settings(self, model: str) -> List[Dict[str, str]]:
         """获取安全设置"""
-        if "2.0" in model and model != "gemini-2.0-flash-thinking-exp":
+        if "2.0" in model and "gemini-2.0-flash-thinking-exp" not in model:
             return [
                 {"category": "HARM_CATEGORY_HARASSMENT", "threshold": "OFF"},
                 {"category": "HARM_CATEGORY_HATE_SPEECH", "threshold": "OFF"},