MusicThing 0.2.6 — Reliable startup and pause animations

Fix MusicThing getting stuck at “Connecting to Mac audio” on the Car Thing’s Chromium 69 browser. The playback synchronizer now starts without globalThis, with a regression test for that environment.

Spotify pause/resume now drives character quiet/performance states directly, including group scenes, runners and fighters. Stale audio frames expire, and delayed polling cannot override a newer pause event. The integration forwards native Spotify song-state updates to MusicThing.

Validation: 91 automated checks, runtime/source archive checks and matching DeskThing store checksums. Private reference portraits and screenshots are not included in this release.