fix(tui): reserve stable top row for copy icon to prevent layout shift#2374
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dgageot merged 1 commit intodocker:mainfrom Apr 10, 2026
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Always render the top row in assistant messages so that hovering to reveal the copy icon does not cause a 1-line layout shift. When not hovered, the row is filled with spaces (invisible); on hover, the copy icon appears in the same reserved space. This fixes the layout shift introduced by 80bccc8 without reintroducing the spurious blank-line artifact it originally fixed. Assisted-By: docker-agent
gtardif
approved these changes
Apr 10, 2026
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Problem
Hovering over an assistant message to reveal the copy button causes a 1-line layout shift, making the message list jump.
Root Cause
Commit 80bccc8 fixed a spurious blank-line artifact on assistant messages by only rendering the copy-icon top row when hovered. However, this meant the row appeared/disappeared on hover, causing a layout shift.
Fix
Always reserve a top row in assistant messages. When not hovered, the row is filled with spaces (invisible but space-occupying). When hovered, the copy icon appears in that same reserved space. This prevents both the layout shift and the blank-line artifact.
Assisted-By: docker-agent