Sending used to park the new user message near the top of the viewport by
reserving blank space below it and holding the viewport there while the
reply streamed in. The reserved space showed up on its own at times and the
hold fought other corrections; with a reliable end-follow and pin in place
the effect no longer pays for its machinery.
The anchoring mode, its arm/claim/position/settle lifecycle, the reserved
end space passed to the list and the anchored-turn geometry are removed.
Sending from the live edge is now an instant return to the end, and the
reply is kept in view by ordinary end-follow; sending from mid-history with
auto-follow off still leaves the viewport untouched.
Testing: scroll module tests trimmed to the remaining geometry; ui
type-check, lint and dead-code report; web build.
Bohdan Triapitsyn
e3b0088c60