补齐成交跟进：按线路推成交通知、收下未成交原因、协商中按工作日再问。

成交走询价消息服务；陆运/海运私聊下一句能记下原因；协商中回执写明顺延三个工作日和下次 9：00。

Co-authored-by: Cursor <cursoragent@cursor.com>

inquiry-agent/tests/test_land_text_inquiry.py

@@ -26,6 +26,7 @@ os.environ.setdefault("LEDGER_BACKEND", "memory")
 
 from agent.ledger.memory_ledger import MemoryLedger
 from agent.policy import inquiry_copy as copy
+from agent.policy.air_text_flow import FlowSession
 from agent.policy.land_text_flow import LandTextInquiryFlow
 
 
@@ -623,5 +624,46 @@ class LandTextPullTests(unittest.TestCase):
         self.assertTrue(is_product(ticket, "u1", flow=self.flow))
 
 
+class LandLostReasonTests(unittest.TestCase):
+    """陆运私聊未成交后，下一句任意文字要记下原因，不能当新询价丢掉。"""
+
+    def test_land_private_next_text_is_lost_reason(self) -> None:
+        ledger = MemoryLedger()
+        created = ledger.create_ticket(
+            sender_id="WuJiLin",
+            business_line="LAND",
+            facts={"起运地": "泉州", "目的地": "南京", "线路类别": "国内城配/拖车/打包"},
+        )
+        wo = str(created.get("work_order_no") or "")
+        ledger.transition(work_order_no=wo, to_status="已报价")
+        flow = LandTextInquiryFlow(ledger)
+        flow._save(
+            FlowSession(
+                sender_id="WuJiLin",
+                thread_id="WuJiLin",
+                phase="wait_deal",
+                business_line="LAND",
+                work_order_no=wo,
+                allowed=(copy.BTN_DEAL, copy.BTN_LOST, copy.BTN_NEGOTIATE),
+            )
+        )
+        replies: list[str] = []
+        phase = flow.on_button(
+            sender_id="WuJiLin",
+            action=copy.BTN_LOST,
+            reply=lambda t, extra=None: replies.append(t),
+        )
+        self.assertEqual(phase, "wait_lost_reason")
+        self.assertEqual(ledger.get_ticket(work_order_no=wo).status, "未成交")
+        phase = flow.on_text(
+            sender_id="WuJiLin",
+            text="价格高",
+            reply=lambda t, extra=None: replies.append(t),
+        )
+        self.assertEqual(phase, "done")
+        self.assertEqual(ledger.get_ticket(work_order_no=wo).lost_reason, "价格高")
+        self.assertTrue(any(t == "已记下未成交原因：价格高。" for t in replies))
+
+
 if __name__ == "__main__":
     unittest.main()