fixed app.py

app.py

@@ -50,9 +50,9 @@ def respond(
     expanded_results = expand_with_neighbors(deduped[:3], collection)
     context = expanded_results[0][0] if expanded_results else ""
 
-    rag_prompt = build_rag_prompt(message, context, system_message)
+    rag_prompt = build_rag_prompt(message, context, system_msg)
     messages = [
-        {"role": "system", "content": system_message.strip() or "你是BangDream知识问答助手, 只能基于提供资料作答。"},
+        {"role": "system", "content": system_msg},
         {"role": "user", "content": rag_prompt}
     ]