- Nav-back / nav-forward now render lucide ArrowLeft / ArrowRight to
match the design's TopBar exactly. Chevron arrows read as accordion
toggles in this design language; arrow heads read as page navigation.
- Omnibar uses uniform px(14) horizontal padding instead of asymmetric
pl(14) pr(8), so the inner chips inherit the design's symmetric breathing
room. The flex/gap layout already keeps the chips at the right edge.