Fix lyrics generation function call and response formatting

- Correct parameter order for generate_structured_lyrics() call in respond() function
- Add format_lyrics import to properly format SongStructure objects for display
- Fix 'takes 4 positional arguments but 5 were given' error in chat interface

app.py

@@ -198,7 +198,7 @@ if project_root not in sys.path:
 
 from tools.groq_client import client as groq_client
 from openai import OpenAI
-from tools.generate_lyrics import generate_structured_lyrics, format_lyrics_for_yue
+from tools.generate_lyrics import generate_structured_lyrics, format_lyrics_for_yue, format_lyrics
 
 # Apply patches after all imports are set up
 patch_applied = apply_transformers_patch()
@@ -372,14 +372,16 @@ def respond(message, state):
         state.conversation.append({"role": "user", "content": message})
         
         # Generate response using your existing lyrics generation logic
-        response = generate_structured_lyrics(
-            message, 
+        song_structure = generate_structured_lyrics(
+            state.conversation,
             state.genre, 
             state.mood, 
-            state.theme,
-            state.conversation
+            state.theme
         )
         
+        # Format the structured lyrics for display
+        response = format_lyrics(song_structure)
+        
         # Add assistant response
         state.conversation.append({"role": "assistant", "content": response})