inject web search result if web search enabled

app.py

@@ -134,7 +134,14 @@ def chat_response(user_msg, chat_history, system_prompt,
     history.append({'role': 'assistant', 'content': ''})
 
     try:
-        prompt = format_conversation(history, system_prompt)
+
+        # merge any fetched search results into the system prompt
+        if search_results:
+            enriched = system_prompt.strip() + "\n\nRelevant context:\n" + "\n".join(search_results)
+        else:
+            enriched = system_prompt
+        prompt = format_conversation(history, enriched)
+
         pipe = load_pipeline(model_name)
         streamer = TextIteratorStreamer(pipe.tokenizer,
                                         skip_prompt=True,