Update sherlock2.py

sherlock2.py

@@ -213,12 +213,21 @@ def search_internet(case_text):
 
     return internet_search_results
 
+
+# Initialize chat history
+if 'chat_history' not in st.session_state:
+    st.session_state.chat_history = []
+
 # Function to display chat history with highlighted user input and chatbot response
 def display_chat_history():
     for user_msg, bot_msg in st.session_state.chat_history:
         st.info(f"**You:** {user_msg}")
         st.success(f"**Sherlock:** {bot_msg}")
 
+# Function to clear chat history
+def clear_chat():
+    st.session_state.chat_history = []
+
 def investigate():
     """Handles the case investigation process, including file upload, text extraction, embedding generation, 
     image processing, information analysis using Gemini models, web/Wikipedia search, and case report generation.