fix(playback): pin queue playback to source server when browsing another library (#717)

* fix(playback): pin queue streams, cover art, and library links to queue server

When the active server changes while a queue from another server is playing,
keep streams and UI on queueServerId; switch back for artist/album links and
queue or player-bar context menus.

* fix(playback): switch to queue server when opening Now Playing

Ensure active server matches queueServerId before Subsonic fetches on the
Now Playing page, mobile player route, and queue info panel; scope caches
by server id.

* docs(credits): mention Now Playing in PR #717 contribution line

* fix(playback): route scrobble and queue sync to queue server

Address PR review: apiForServer for scrobble/now-playing/savePlayQueue,
clear queueServerId on server removal, mini-player queueServerId sync,
block cross-server enqueue with toast, and regression tests.

src/components/playerBar/PlayerTrackInfo.tsx

@@ -35,7 +35,7 @@ interface Props {
   userRatingOverrides: Record<string, number>;
   setUserRatingOverride: (id: string, r: number) => void;
   toggleFullscreen: () => void;
-  navigate: (to: string) => void;
+  navigate: (to: string) => void | Promise<void>;
   openContextMenu: PlayerState['openContextMenu'];
   t: TFunction;
 }
@@ -115,7 +115,7 @@ export function PlayerTrackInfo({
                   songCount: 0,
                   duration: 0,
                 };
-                openContextMenu(e.clientX, e.clientY, album, 'album');
+                openContextMenu(e.clientX, e.clientY, album, 'album', undefined, undefined, undefined, undefined, true);
               }
             : undefined}
         />