fix: 已出号后新一轮询价不带上一单字段

点名海运时丢掉旧陆运补问草稿，避免补字段误发填写样例图。

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

inquiry-agent/tests/test_sea_options.py

@@ -14,6 +14,7 @@ if ROOT not in sys.path:
 
 from agent.schema.sea_options import (
     canonicalize_sea_class,
+    drop_invented_door_trade_terms,
     harvest_sea_class,
     sea_class_prompt,
 )
@@ -41,6 +42,13 @@ class SeaOptionsTest(unittest.TestCase):
         got = harvest_sea_class("运输分类：其他", {"运输分类": "Port to Port"})
         self.assertEqual(got["运输分类"], "其他")
 
+    def test_door_to_door_not_kept_as_trade_terms(self):
+        text = "海运、纽约港到巴生西港，机器设备，40HQ*1，整柜，1.5KG，15CBM，15件"
+        got = drop_invented_door_trade_terms(text, {"贸易条款": "门到门", "品名": "机器设备"})
+        self.assertNotIn("贸易条款", got)
+        kept = drop_invented_door_trade_terms("贸易条款：门到门", {"贸易条款": "门到门"})
+        self.assertEqual(kept["贸易条款"], "门到门")
+
     def test_prompt_lists_two_options_only(self):
         text = sea_class_prompt()
         self.assertIn("Port to Port", text)