Zero-chrome always-open band replaces CurrentJamPanel below the
instrument row; ProgressionBanner survives as the single loop display
(RoadmapTrack retires, education folds into rail row headers); App
instrument state threads everywhere (JamGuide internal tabs die);
vertical rows, all stations expanded, playhead highlights; honest
wrap-based math (worst piano gallery 1,178px). Critic returned once
(Dm7-specific worst case + 3 factual fixes incl. the interim
page-yank), fixed, PASS on scoped re-gate (pixel-exact recompute).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
vadimwit