eisland-dev-add-empty-setting-subpage

Add a new empty subpage (tab) to an existing eIsland settings section with page navigation support. Use this skill whenever the user wants to add a new tab/page/subpage to any settings section in the eIsland project, including requests like "添加分页", "add a tab", "add subpage", "新建空白分页", "add empty page to settings", or when extending settings sections like AI, update, network, music, weather, mail, etc. with new page…