beforeinstallprompt is Chromium-only by spec -- Safari (iOS and
macOS) never fires it and has no programmatic install API at all, so
the existing install banner silently did nothing there. Detects iOS
Safari specifically and shows a static "tap Share, then Add to Home
Screen" banner instead, dismissible and tracked separately from the
Chromium banner's own dismissal state. No-ops once already installed
(display-mode: standalone / navigator.standalone).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Arnaud
3aaa12910a