refactor: split websocket flows and add brain action decision pipeline

core/websocket_summary_flow.py

@@ -0,0 +1,23 @@
+async def save_conversation_summary_flow(client, customer_id: str, buyer_msg: str, agent_reply: str):
+    """用 AI 生成一句话对话摘要并持久化。"""
+    try:
+        from db.customer_db import db
+        from openai import AsyncOpenAI
+
+        api_client = AsyncOpenAI(
+            api_key=client.agent.api_key if client.agent else None,
+            base_url=client.agent.base_url if client.agent else None,
+        )
+        resp = await api_client.chat.completions.create(
+            model=client.agent.model_name if client.agent else "gpt-4o-mini",
+            messages=[
+                {"role": "system", "content": "用一句话（15字以内）总结这段对话的核心内容，只输出摘要文字。"},
+                {"role": "user", "content": f"买家：{buyer_msg}\n客服：{agent_reply}"},
+            ],
+            max_tokens=30,
+            temperature=0.3,
+        )
+        summary = resp.choices[0].message.content.strip()
+        db.save_conversation_summary(customer_id, summary)
+    except Exception:
+        client.logger.debug("保存对话摘要失败(不影响主流程)", exc_info=True)