Several layout faults shipped while every gate passed, because nothing
looked at geometry: a header whose height tracked the viewport, controls
at four different heights, a tab strip that ran under the controls, and a
dropdown that opened underneath the page.
Assert the invariants behind those at four widths — the header stays one
row, the tabs do not reach the controls, the controls share a height, the
page does not scroll sideways — and that the menu renders with real
dimensions and wins a hit test at its own centre.
The overlap check measures the tabs rather than the strip: with the strip
allowed to overflow, its box shrinks while its content paints across the
controls, so the container's own rect never registers the collision.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GdyUjuXejCEfiub675z6cz
Signed-off-by: Stan Grams <sjg@haxx.space>
sjgandClaude Opus 5