The schema sidebar (the left Tables column) is now shown only when the
terminal is wider than 90 columns; at or below that it is hidden and
the output/input panels span the full width. This reclaims horizontal
space on narrow terminals — notably the 90-column screencasts, where
the sidebar added little and cost the output panel its width.
Visibility is a pure function of terminal width (sidebar_visible);
the Ctrl-O peek-reveal lands in Phase C. render() splits the layout
conditionally — full-width right column when the sidebar is hidden.
Snapshots/tests that rendered at 80 wide now reflect the hidden
sidebar; those whose intent IS the sidebar (populated_with_table, the
items-panel and drop-table integration checks) render at 110 so the
Tables list is actually exercised — one masked-intent integration
check (matched "Customers" in the output, not the panel) is corrected
the same way. New tests cover the width gate and the show/hide
boundary.
claude@clouddev1
386627a262