Two part mixins re-declared members owned by siblings (five playback methods with full 17-parameter signatures, _safeFetchItemsArray with four lint suppressions), violating jellyfin_client.dart's own 'declared exactly once' contract — they now live on _JellyfinClientInternals, with _safeFetchItemsArray declared as its positional core so no suppressions survive. LiveTvSupport.resolveStreamUrl's only caller anywhere was Jellyfin's own startPlayback, so it is now a private negotiation step and Plex drops its permanent null stub; the negotiation tests observe the same contract through startPlayback and the heartbeat wire. JellyfinApiCache's unpinForOffline/isPinnedItemId (zero callers, kept only for Plex symmetry) are gone, as are MediaSubscriptionCreateRequest's never-populated hints/params/providers expansions in the Plex live-TV serializer.
edde746
093c0596f1