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_sea_text_inquiry.py

@@ -1522,9 +1522,36 @@ class SeaGroupOpsTests(unittest.TestCase):
             flow=self.flow,
             ledger=self.ledger,
         )
-        self.assertEqual(phase, "done")
+        self.assertEqual(phase, "wait_lost_reason")
         self.assertEqual(self.ledger.get_ticket(work_order_no=wo).status, "未成交")
 
+    def test_sales_next_text_is_lost_reason(self) -> None:
+        wo, chat = self._open_group()
+        handle_group_collab(
+            InboundMessage(
+                sender_id="sales1",
+                message_id="lost-1",
+                content="未成交",
+                chat_id=chat,
+                chat_type="group",
+            ),
+            flow=self.flow,
+            ledger=self.ledger,
+        )
+        phase = handle_group_collab(
+            InboundMessage(
+                sender_id="sales1",
+                message_id="lost-2",
+                content="客人比价了",
+                chat_id=chat,
+                chat_type="group",
+            ),
+            flow=self.flow,
+            ledger=self.ledger,
+        )
+        self.assertEqual(phase, "done")
+        self.assertEqual(self.ledger.get_ticket(work_order_no=wo).lost_reason, "客人比价了")
+
     def test_sales_can_close_deal_by_text(self) -> None:
         """群里销售说成交，要入账并回话，不能装没听见。相近说法也认。"""
         wo, chat = self._open_group()