6 · Status & revisions / 状态与版本
A → B · 版本号只读，请在此升版 · logs the change · stamped on every export
8 · Evidence records / 证据留痕
Dated ledger · the interface offers no per-entry delete control, but this is NOT tamper-proof: entries are plain text in this browser and can be rewritten by importing a modified JSON or editing local storage. This is not a notarised record and cannot stand alone as arbitration evidence. Chat excerpts on their own have limited probative weight — record the agreed conclusion and attach the original payment / shipping documents. 界面无单条删除入口，但不具防篡改能力（本地明文记录可被导入件或浏览器存储改写），不能单独作为仲裁证据；聊天摘录单独使用证明力有限，须附原始单证。
no delete button in the UI · 界面无删除入口（非防篡改）