Update app.py

fixed api key issues

app.py

@@ -25,12 +25,21 @@ class GaiaLangGraphAgent:
         print("Initializing GaiaLangGraphAgent...")
         load_dotenv()
 
+        google_api_key = os.getenv("GOOGLE_API_KEY")
+        if not google_api_key:
+            raise ValueError("GOOGLE_API_KEY secret not found. Please set it in your Hugging Face Space settings.")
+
         class AgentState(TypedDict):
             question: str
             intermediate_steps: Annotated[List[BaseMessage], operator.add]
         self.AgentState = AgentState
 
-        web_search_tool = TavilySearchResults(max_results=4)
+        web_search_tool = TavilySearchResults(
+            tavily_api_key=os.getenv("TAVILY_API_KEY"),
+            search_engine="google",
+            max_results=3,
+            return_direct=True,
+        )
 
         @tool
         def calculator(expression: str) -> str:
@@ -40,7 +49,7 @@ class GaiaLangGraphAgent:
                 return str(numexpr.evaluate(expression).item())
             except Exception as e: return f"Error: {e}"
 
-        llm_vision = ChatGoogleGenerativeAI(model="gemini-1.5-pro-latest")
+        llm_vision = ChatGoogleGenerativeAI(model="gemini-2.5-pro-preview-06-05", google_api_key=google_api_key)
 
         def get_file_path(file_name: str) -> str:
             if not os.path.exists("task_files"): os.makedirs("task_files")