- Android/iOS now return to cat.ikerdemo.musify:/callback instead of
musify://callback: a private-use scheme based on a domain we own
(RFC 8252 section 7.1), so another app is unlikely to claim it.
- The Musify Native app no longer needs devMode: loopback and custom
scheme redirects are both valid for a native app.
- zitadel-init also updates an existing app's config, so the change
reaches instances created before it (the client id is kept).
- iOS takes the scheme from everything before the first ':', since the
new URI has a single slash.