Make API_KEY/API_BASE/SUMMARY_MODEL_NAME optional, fallback to DR_MODEL_* vars

visit.py

@@ -97,9 +97,10 @@ class Visit(BaseTool):
         return response.strip()
 
     def call_server(self, msgs, max_retries=2):
-        api_key = os.environ.get("API_KEY")
-        url_llm = os.environ.get("API_BASE")
-        model_name = os.environ.get("SUMMARY_MODEL_NAME", "qwen/qwen3-30b-a3b-instruct-2507")
+        # Use summary model config, fallback to main model config
+        api_key = os.environ.get("API_KEY") or os.environ.get("DR_MODEL_API_KEY")
+        url_llm = os.environ.get("API_BASE") or os.environ.get("DR_MODEL_SERVER")
+        model_name = os.environ.get("SUMMARY_MODEL_NAME") or os.environ.get("DR_MODEL_NAME", "qwen/qwen3-30b-a3b-instruct-2507")
         
         client = OpenAI(
             api_key=api_key,