iOS Safari ignores the web manifest for home-screen icons entirely and
needs its own apple-touch-icon link, which Next.js only emits when
app/apple-icon.tsx (or a literal apple-icon.png) exists. Without it,
iOS falls back to a screenshot of the open page instead of the brand
mark. Mirrors the existing public/icon.svg design via next/og.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
