Root cause: html/body had no height/overflow constraint, so the
webview allowed rubber-band overscroll. .app used min-height: 100vh
which on iOS resolves to the larger viewport (behind URL bar), causing
layout to reflow when the bar collapses.
- index.css: html/body locked to 100% height, overflow hidden,
overscroll-behavior none; #root set to exact 100dvh
- App.css: .app height: 100dvh (was min-height: 100vh) with
overflow-y: auto + overscroll-behavior: contain so the .app
becomes the scroll container
- capacitor.config.json: ios.bounces false, contentInset never
Co-Authored-By: Claude <noreply@anthropic.com>
Antoni Nuñez Romeu