.assistant-layout.history-collapsed set display:none on .assistant-history, which
removes it from grid flow. The layout still declared three tracks
(0 / minmax(0,1fr) / 330px), so the two remaining items shifted left: .assistant-main
took the 0 track and #assistant-sources took the 1fr. Collapsing the sidebar made
the chat vanish and rendered the citations in its place. The rail is now a
zero-width, visibility:hidden grid item, so the columns stay where they belong.
Also: inside the assistant workspace the topbar no longer repeats "AI Clinical
Assistant" — the page is the assistant. It stays in the DOM, visually hidden, so
screen readers still announce it.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BkfrkQwA4YGrGw9LZSpeAq