Identify recurring charges and subscriptions from receipts or email exports, and produce a clean summary with renewal dates, price changes, and cancellation drafts. Use when a user wants to audit spending without initiating payments or cancellations.

从收据或邮件导出中识别重复收费和订阅，生成包含续订日期、价格变动和取消草稿的清晰摘要。适用于用户希望审计支出但不希望发起支付或取消操作的场景。