Send-ready build with images already pointed at the hosted assets. Copy HTML → your email platform's code view. The ESP still needs to fill {{UNSUBSCRIBE}} and {{PREFERENCES}}.
app-home-screen-2x.png) is upscaled from a 270px screenshot and is soft — replace it with a real 2× export from design. Never send the dist/…PREVIEW… builds: Gmail and Outlook strip data: URIs, so the QR codes and logo vanish.