1.0 library + player settings: Jellyfin/Link/Files library with details panel, player gear, settings cards, host flag

Library: source switch, selectable cards with a details panel, one merged
Continue row, Latest grouped per series without re-releases, Link page with
previews and recent links, Files embedded. Player: gear popover in both
designs, progress line while controls hide, live hwdec. Settings rebuilt as
cards. State marks the host member (proto stays 9, unreleased); hosting
shows LAN invite addresses; window buttons in fullscreen. fadeThrough keeps
the outgoing view's state.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/desktop/lib/src/shell/avatar.dart

@@ -103,8 +103,9 @@ AvatarInfo memberAvatarInfo(MemberView m, StateBroadcast? r, SessionCoordinator
     buffering: !m.stale && m.ready && playing && m.buffered < RelayConstants.minBufferSecs,
     relaying: relay != null && relay.source.isNotEmpty && relay.source == m.id,
     stale: m.stale,
-    // Only your own app knows it hosts: the state carries no host flag.
-    host: self && coord.hostFile != null,
+    // The state marks the host (`members[].host`); your own app also
+    // knows before the first state.
+    host: m.host || (self && coord.hostFile != null),
     self: self,
   );
 }