Clear old reports before each run

app.py

@@ -1,7 +1,7 @@
 import os
 import sys
 import tempfile
-import time
+import shutil
 import streamlit as st
 import pandas as pd
 import requests
@@ -45,6 +45,12 @@ if submitted:
         insights_df = pd.DataFrame()
         html_paths = []
 
+        # === Clear old reports ===
+        for folder in ["data", "html"]:
+            if os.path.exists(folder):
+                shutil.rmtree(folder)
+            os.makedirs(folder, exist_ok=True)
+
         os.environ["OPENAI_API_KEY"] = openai_api_key
         os.environ["TAVILY_API_KEY"] = tavily_api_key