Manifest + hand-authored icons (any + maskable) + iOS meta tags, so it
can be added to a phone's home screen and opened without browser
chrome. No service worker - explored as a possible route to automatic
Picture-in-Picture on backgrounding, but confirmed (by actually calling
requestPictureInPicture() from a real visibilitychange listener) that
install state doesn't change that API's fresh-gesture requirement, so
this is a standalone feature rather than a fix for that limitation.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
