DSH Delete Message

Key features

• Whole Message Type - Assistant replying to hang on official conversion.chat.assist-actions slot
• Plugin relies on the private association of three hosters - React Fiber, CSS-modules actions tokens, and data-chat-flow-key/data-content-source -- data-DOM hooks.
• Service-side removes the full prerun validation: accept only user/mmessage and view/message surface nodes in closed rounds (real user input replaces only single node)
• User input, context line of machine injections, tool call cards, Think cards, model retry tips and round error banners are enhanced by DOM (no side handle extension point for host).
• The chrome line (non-user/assist) delete buttons are defaulted to hide, suspend and allow clicks when the message is suspended.