[Feature] Security & Permissions

[gaomeng1900]

Community Communication / 社区沟通

• I will be polite and respectful. / 我会保持礼貌与尊重。
• I will share constructive, actionable suggestions. / 我会提供建设性、可行动的建议。
• I have read the CODE_OF_CONDUCT.md and CONTRIBUTING.md. / 我已阅读行为准则。

Feature Description / 功能描述

Implement the "Security & Permissions" features planned in the doc.

• black list of interactive elements
• black/white list of page urls