Update app.py

app.py

@@ -82,15 +82,15 @@ def professional_agent(user_input, state):
         question = re.sub(r"我是.*?(，|,)", "", user_input)
         if not question.strip():
             answer = f"✅ 已設定你的專業領域：\n{profession_prompt}\n請提出問題。"
-            state["chat_history"].append([user_input, answer])
+            state["chat_history"].append({"role":"user","content":user_input})
+            state["chat_history"].append({"role":"assistant","content":answer})
             return state["chat_history"], state
         else:
             user_input = question
 
     messages = [{"role": "system", "content": state["profession_prompt"]}]
-    for h in state["chat_history"]:
-        messages.append({"role": "user", "content": h[0]})
-        messages.append({"role": "assistant", "content": h[1]})
+    for msg in state["chat_history"]:
+        messages.append({"role": msg["role"], "content": msg["content"]})
     messages.append({"role": "user", "content": user_input})
 
     try:
@@ -105,9 +105,13 @@ def professional_agent(user_input, state):
         print(tb)  # 後端完整 log
         answer = f"⚠️ 發生錯誤，請查看後端 logs: {str(e)}"
 
-    state["chat_history"].append([user_input, answer])
-    if len(state["chat_history"]) > 10:
-        state["chat_history"] = state["chat_history"][-10:]
+    # Append using dict 格式
+    state["chat_history"].append({"role":"user","content":user_input})
+    state["chat_history"].append({"role":"assistant","content":answer})
+
+    # 保留最近 10 條訊息
+    if len(state["chat_history"]) > 20:
+        state["chat_history"] = state["chat_history"][-20:]
 
     return state["chat_history"], state