Fix debrief bug: capture conversation before clearing state

The conversation transcript and setup parameters were being extracted
AFTER the messages were cleared, resulting in empty debrief context.
Now extracts all needed data before clearing session state.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app.py

@@ -257,12 +257,14 @@ else:
         col1, col2, col3 = st.columns([1, 2, 1])
         with col2:
             if st.button("🤔 I'm Ready to Debrief", use_container_width=True):
-                # Clear previous conversation state
-                st.session_state.messages = []
-                st.session_state.in_debrief = True
-                
-                # Get the original setup parameters
+                # Get the original setup parameters BEFORE clearing messages
                 system_msg = next((msg for msg in st.session_state.messages if msg["role"] == "system"), None)
+
+                # Get conversation transcript BEFORE clearing messages
+                conversation_transcript = "\n".join([
+                    f"{msg['role'].capitalize()}: {msg['content']}"
+                    for msg in st.session_state.messages[1:]  # Skip system message
+                ])
                 if system_msg:
                     # Extract parameters from the system message
                     content = system_msg["content"]
@@ -276,11 +278,9 @@ else:
                     tone = "Not specified"
                     goal = "Not specified"
 
-                # Get conversation transcript
-                conversation_transcript = "\n".join([
-                    f"{msg['role'].capitalize()}: {msg['content']}"
-                    for msg in st.session_state.messages[1:]  # Skip system message
-                ])
+                # NOW clear conversation state and enter debrief mode
+                st.session_state.messages = []
+                st.session_state.in_debrief = True
 
                 # Prepare debrief system message
                 debrief_system_message = f"""You are a therapeutic reflection partner. Your role is to help the user understand how they showed up in a difficult relational roleplay, integrating insights from: