fix(workflow): fix env timeout configuration and LLM node message role mismatch

api/app/core/config.py

@@ -169,7 +169,7 @@ class Settings:
     SYSTEM_VERSION: str = os.getenv("SYSTEM_VERSION", "v0.2.0")
 
     # workflow config
-    WORKFLOW_NODE_TIMEOUT: int = os.getenv("WORKFLOW_NODE_TIMEOUT", 600)
+    WORKFLOW_NODE_TIMEOUT: int = int(os.getenv("WORKFLOW_NODE_TIMEOUT", 600))
 
     def get_memory_output_path(self, filename: str = "") -> str:
         """

api/app/core/workflow/nodes/llm/node.py

@@ -102,7 +102,7 @@ class LLMNode(BaseNode):
                 elif role in ["user", "human"]:
                     messages.append({"role": "user", "content": content})
                 elif role in ["ai", "assistant"]:
-                    messages.append({"role": "user", "content": content})
+                    messages.append({"role": "assistant", "content": content})
                 else:
                     logger.warning(f"未知的消息角色: {role}，默认使用 user")
                     messages.append({"role": "user", "content": content})