Update app.py

app.py

@@ -175,10 +175,11 @@ def main():
     st.set_page_config(page_title="Gemini 2.0 Flash Chat Q&A", layout="wide")
     st.title("\U0001F4C4 Team 18 Comprehensive Prototype Using Gemini 2.0 Flash")
 
+    # Ensure that session state variables are correctly initialized
     if "conversation" not in st.session_state:
         st.session_state.conversation = []
     if "documents_text" not in st.session_state:
-        st.session_state.documents_text = []
+        st.session_state.documents_text = ""  # Initialize as an empty string, not a list
     if "chat_active" not in st.session_state:
         st.session_state.chat_active = True
     if "chat_history" not in st.session_state:
@@ -228,9 +229,9 @@ def main():
             except Exception as e:
                 st.error(f"Failed to extract/process {uploaded_file.name}: {e}")
 
-        st.session_state.documents_text = all_text_content
+        st.session_state.documents_text += all_text_content  # Append the extracted text
 
-    # Media Capture: Buttons to Capture Photo or Video
+    # Media Capture Section
     st.sidebar.header("Capture Media")
     capture_option = st.sidebar.radio("Select Media Capture Option", ["None", "Capture Photo", "Capture Video"])