Jellyfin and Subsync Fixes (#13)

src/main/runtime/composers/jellyfin-runtime-composer.test.ts

@@ -111,6 +111,7 @@ test('composeJellyfinRuntimeHandlers returns callable jellyfin runtime handlers'
       listJellyfinLibraries: async () => [],
       listJellyfinItems: async () => [],
       listJellyfinSubtitleTracks: async () => [],
+      writeJellyfinPreviewAuth: () => {},
       logInfo: () => {},
     },
     handleJellyfinPlayCommandMainDeps: {