Update app.py

app.py

@@ -16,8 +16,9 @@ CSS = """.duplicate-button { margin: auto !important; color: white !important; b
 def model_to_user_format(response):
     """Convert model format (with reasoning tags) to user format (with markdown)"""
     if "<|end_reasoning|>" in response:
-        # Split at the end reasoning tag
-        reasoning, content = response.split("<|end_reasoning|>")
+        parts = response.split("<|end_reasoning|>", 1)  # Split at most once
+        reasoning = parts[0]
+        content = parts[1] if len(parts) > 1 else ""  # Handle case if no split occurred
         # Remove start reasoning tag if present
         reasoning = reasoning.replace("<|start_reasoning|>", "").strip()
         # Format in markdown