replace width='stretch' with use_container_width=True

app.py

@@ -457,7 +457,7 @@ def main():
             )
         
         with col2:
-            send_button = st.button("Send", key="send_button", width='stretch')
+            send_button = st.button("Send", key="send_button", use_container_width=True)
         
         # Clear chat button
         if st.button("🗑️ Clear Chat", key="clear_chat_button"):
@@ -724,7 +724,7 @@ def main():
                 
                 submitted = st.form_submit_button(
                     "📤 Submit Feedback", 
-                    width='stretch',
+                    use_container_width=True,
                     disabled=submit_disabled
                 )
                 
@@ -892,7 +892,7 @@ def main():
             st.success("✅ Feedback already submitted for this conversation!")
             col1, col2 = st.columns([1, 1])
             with col1:
-                if st.button("🔄 Submit New Feedback", key="new_feedback_button", width='stretch'):
+                if st.button("🔄 Submit New Feedback", key="new_feedback_button", use_container_width=True):
                     try:
                         st.session_state.feedback_submitted = False
                         st.rerun()
@@ -901,7 +901,7 @@ def main():
                         logger.error(f"Error resetting feedback state: {e}")
                         st.error(f"Error resetting feedback. Please refresh the page.")
             with col2:
-                if st.button("📋 View Conversation", key="view_conversation_button", width='stretch'):
+                if st.button("📋 View Conversation", key="view_conversation_button", use_container_width=True):
                     # Scroll to conversation - this is handled by the auto-scroll at bottom
                     pass
     
@@ -1035,7 +1035,7 @@ def main():
         st.markdown(f"**Example:** `{example_q1}`")
         st.info("💡 **Filter to apply:** Select a Filename from the sidebar panel before asking this question.")
     with col2:
-        if st.button("📋 Use This Question", key="use_example_1", width='stretch'):
+        if st.button("📋 Use This Question", key="use_example_1", use_container_width=True):
             st.session_state.pending_question = example_q1
             st.session_state.input_counter = (st.session_state.get('input_counter', 0) + 1) % 1000
             st.rerun()
@@ -1056,7 +1056,7 @@ def main():
     )
     col1, col2 = st.columns([1, 4])
     with col1:
-        if st.button("📋 Use Question 2", key="use_custom_1", width='stretch'):
+        if st.button("📋 Use Question 2", key="use_custom_1", use_container_width=True):
             if custom_q1.strip():
                 st.session_state.pending_question = custom_q1.strip()
                 st.session_state.custom_question_1 = custom_q1.strip()
@@ -1082,7 +1082,7 @@ def main():
     )
     col1, col2 = st.columns([1, 4])
     with col1:
-        if st.button("📋 Use Question 3", key="use_custom_2", width='stretch'):
+        if st.button("📋 Use Question 3", key="use_custom_2", use_container_width=True):
             if custom_q2.strip():
                 st.session_state.pending_question = custom_q2.strip()
                 st.session_state.custom_question_2 = custom_q2.strip()