The toggle sat on its own dedicated row, leaving a large empty band above the
project grid. On desktop (>=769px) float it top-right on the SAME row as the
filter box / launcher header: panels fill from the top (inset 0), launcher-head
reserves right padding for the pill. Mobile keeps the centred stacked toggle to
avoid overlapping the full-width filter on narrow screens. Also reclaim the
hidden key-bar's space on the home view (body.home-open #term { bottom: 0 }).
CSS-only (style.css is served directly). Verified in-browser: toggle and filter
share a row on Projects, no overlap with New/Manage on Sessions.
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