修复附件询价：公网打开上传页不再出骨架 JSON，未上传时打字能正常回话。

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

inquiry-agent/agent/policy/attachment_wave.py

@@ -287,6 +287,24 @@ class AttachWaveBook:
             parts.append(wave.follow_text.strip())
         return "\n".join(parts)
 
+    def abandon_if_idle(self, sender_id: str) -> bool:
+        """
+        还没开始认材料：作废等待票。已开始认或无票返回 False。
+
+        销售发卡后改口打字询价时用。旧 H5 随后按过期拒绝。
+        """
+        sid = (sender_id or "").strip()
+        if not sid:
+            return False
+        with self._lock:
+            self._hydrate(sid)
+            wave = self._waves.get(sid)
+            if wave is None or wave.business_done or wave.started:
+                return False
+            wave.business_done = True
+            self._persist(sid)
+            return True
+
     def mark_business_done(self, sender_id: str) -> None:
         """业务补问/卡片已发出。之后旧 H5 与并入图都必须拒绝。"""
         sid = (sender_id or "").strip()