Update app.py

app.py

@@ -51,7 +51,8 @@ from langgraph.graph.message import add_messages
 class AgentState(TypedDict):
     # The input document
     messages: Annotated[list[AnyMessage], add_messages]
-
+    input_file: Optional[str]  # Contains file path, type (PNG)
+    
 from langchain_core.messages import HumanMessage, SystemMessage
 
 # from langchain_core.tools import tool # non necessary with toolNode