The legend's reposition() now derives its Y from the header panel's
MEASURED bottom plus a named 12px gap (new accessors on the viewer;
deferred recompute so it reads settled layout, refreshed on header
content change) — the old hardcoded 60.0 sat 17px inside the wrapped
header's real 77px bottom, fusing the panels. Pixel-proven at the
evidence center: bottom=77.0, legend top=89.0, gap=12.0 exact. All 13
goldens regenerated at the DOCUMENTED 960x540 (the 1280x720 rider was
my own CLI flag, not a config; PIL-verified) with two-run byte
stability. Two structural tests pin the header/legend relationship
(T-1192 precedent), proven failing-first against the old constant
(-17.0px reported), and the legacy test that pinned the literal 60.0
now asserts the derived relationship so it cannot re-enforce drift.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
jpmschweitzerandClaude Fable 5
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