arcnapan/dsh-chat-answer-anchor

Freezes the DSH chat scroll position: new replies no longer drag the viewport to the bottom — it stays where you left it. Only after you send a message does it follow to the bottom so you can see your own input, then it locks again once the answer starts streaming. Each session remembers its own position (persisted across reloads), a settings toggle turns it off, and it never intercepts your own scrolling.