DC3 — navigation-mode scroll: the focused Tables / Relationships panel
scrolls (Up/Down by a line, PageUp/PageDown by its visible-row count).
Per-panel offsets are clamped to content at render time, and the
renderer reports each panel's visible rows for paging — mirroring the
output panel's scroll. render_items_panel / render_relationships_panel
take &mut App, count their rows, and store+clamp the offset before
building the borrowing lines.
DC2 refinement: the expand-on-focus overlay now clears only the sidebar
strip plus a one-column gutter, leaving the base output/input/hint
visible (unchanged) to the right rather than blanking the whole area —
truer to "underneath keeps its layout", with the gutter keeping the
cut-off edge clean (chosen after eyeballing both variants). ADR DC2 and
the overlay snapshot updated to match.
Tests: line/page scroll move only the focused panel and clamp; the
render clamps a past-the-end offset so the last row stays visible.
claude@clouddev1
22bec61d11