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/handlers/attachment_inquiry.py

@@ -79,6 +79,21 @@ def is_active_attachment_wait(sender_id: str, *, now: Optional[float] = None) ->
     return get_attach_wave_book().active(sender_id, now=now) is not None
 
 
+def is_idle_attachment_wait(sender_id: str, *, now: Optional[float] = None) -> bool:
+    """已发卡但还没传 Excel/PDF/图。此时销售打字应走文字询价。"""
+    wave = get_attach_wave_book().active(sender_id, now=now)
+    return wave is not None and not wave.started
+
+
+def abandon_idle_attach_wait(sender_id: str) -> bool:
+    """
+    作废未开始认的等待票。已开始认返回 False。
+
+    副作用：旧上传卡随后按过期拒绝。
+    """
+    return get_attach_wave_book().abandon_if_idle(sender_id)
+
+
 def append_attach_text(sender_id: str, text: str) -> bool:
     """认完之前的字并进本票，不走文字询价。"""
     return get_attach_wave_book().append_follow_text(sender_id, text)