Since real device names started reaching the header, an accented one
made login impossible: dart:io refuses header values above 0x7F, and
CFNetwork puts the raw code unit on the wire as a Latin-1 byte, which
Kestrel rejects as a malformed request with 400 before Jellyfin routes
POST /Users/AuthenticateByName.
Encode every field the way the official Jellyfin SDK does; the server
already reverses it with WebUtility.UrlDecode, so the wire value stays
pure ASCII while the device list shows the real name. Quotes, commas
and `=` no longer need stripping either. sanitizeHeaderValue, which
still guards the Plex headers, now folds Latin letters to their base
form instead of emitting bytes no transport accepts.
close#1685
`dart format --set-exit-if-changed` over lib and test rewrites these.
The analysis job never reached its formatting step, so the drift went
unnoticed. No behaviour changes.
Resolve platform, hardware model, and friendly device name once via a
shared DeviceIdentityService and send them to both backends: Plex gets
a real X-Plex-Platform plus X-Plex-Device/X-Plex-Device-Name (shown as
Player in dashboards/Tautulli), Jellyfin gets the device name in the
MediaBrowser auth header. Transcode and live-TV decision requests keep
their pinned platform names, which Plex validates server-side.
close#1270
edde746