Update app.py

app.py

@@ -5,6 +5,7 @@ import inspect
 import pandas as pd
 from smolagents import CodeAgent, DuckDuckGoSearchTool, OpenAIServerModel, VisitWebpageTool, Tool, HfApiModel, ToolCallingAgent
 import io
+import base64
 # (Keep Constants as is)
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"