Update app.py

app.py

@@ -304,10 +304,11 @@ def chat_response(message, history):
     context = paper_mgr.search(message)
     response = llm.chat(message, context)
 
-    # Gradio 4.x format: list of dicts with role and content
-    history.append({"role": "user", "content": message})
-    history.append({"role": "assistant", "content": response})
-    return "", history
+    # Create new history list to avoid reference issues
+    new_history = history.copy() if history else []
+    new_history.append({"role": "user", "content": message})
+    new_history.append({"role": "assistant", "content": response})
+    return "", new_history
 
 def voice_chat(audio_path, history):
     """Voice chat"""
@@ -328,33 +329,12 @@ def voice_chat(audio_path, history):
 
     display_msg = f"🎤 You said: {text}\n\n🤖 Answer: {response}"
     
-    # Gradio 4.x format: list of dicts with role and content
-    history.append({"role": "user", "content": text})
-    history.append({"role": "assistant", "content": response})
+    # Create new history list to avoid reference issues
+    new_history = history.copy() if history else []
+    new_history.append({"role": "user", "content": text})
+    new_history.append({"role": "assistant", "content": response})
 
-    return display_msg, history
-
-def voice_chat(audio_path, history):
-    """Voice chat"""
-    if not audio_path:
-        return "No audio recorded", history
-
-    text = voice.transcribe(audio_path)
-    if text.startswith("Error"):
-        return text, history
-
-    print(f"🎤 Transcribed: '{text}'")
-
-    if not paper_mgr.index:
-        return "Load a paper first", history
-
-    context = paper_mgr.search(text.strip(), k=3)
-    response = llm.chat(text.strip(), context)
-
-    display_msg = f"🎤 You said: {text}\n\n🤖 Answer: {response}"
-    history = history + [[text, response]]
-
-    return display_msg, history
+    return display_msg, new_history
 
 # ============================================================================
 # BUILD UI