Completed AI responses now expose a bottom copy action that copies their Markdown source without reasoning, tool logs, or citation metadata. Clipboard writes use a validated Preload/Main bridge so sandboxed Electron sessions no longer fail with a renderer clipboard permission error; full-conversation copy uses the same path. Release note: AI 回复底部现在可以直接复制 Markdown 原文,并修复了沙箱环境下回复和完整会话可能无法写入剪贴板的问题。