CIO has no TLS implementation on kotlin/native, so every secure
connection died at the handshake with "TLS sessions are not supported
on Native platform". Pick the engine per platform -- CIO on android
and the desktop jvm, Darwin on ios -- and pin both the relay socket
client and coil's image fetcher to it.
Coil is the half that is easy to miss. Nothing in the app configured an
ImageLoader, so its default ktor fetcher built a bare `HttpClient()` and
took whichever engine the classpath served first; every avatar and
preview over https would have failed the same way the sockets did, with
nothing in the app's own code to point at. `MantraApp` is the one place
both call sites are reachable from, and the factory is installed above
`MantraTheme` so it is in place before the first AsyncImage composes.
The darwin dependency goes inside the existing isMacOsX gate, so nothing
about resolution on a linux or windows host changes.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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