The first onboarding screen showed the app icon inside AnimatedOnboardingIcon's
soft circle — a 10% tinted disc with an 18% ring around it. The wrapper now takes
`showsHalo`, defaulting to true so the other five pages and BestValueIntroView keep
theirs unchanged; the welcome page passes false.
Verified with before/after installs on the simulator:
- the icon's artwork is pixel-identical and unmoved (centre 603,661, 95 pt);
- the halo is gone — the tile's non-background footprint falls from the 118 pt
ring to exactly the 96 pt tile, and the ring pixels at r=59 pt lose their tint;
- page 1 differs only by the status-bar clock, so the other pages are untouched.
The copy below the icon tightens by ~11 pt: the page block is centred between two
spacers and the icon's container no longer contributes 22 pt of height. The page
dots and the Continue button do not move. The icon keeps its soft accent shadow.