The BUG-930 pin spacer sat on the last assistant row, pushing its sibling
.message-actions (and follow-ups / delivery card) below half a screen of
empty space. Move the same min-height onto the last turn's entry
(`:last-child:has(.message-assistant)`) with align-content: start so the
rectification grid wrap does not stretch its rows. Hook logic unchanged.
Records BUG-1043 / BUG-1044 (pre-existing, investigating) found during
browser verification.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8
