fix: use isPlaying() in syncNowPlaying to handle bridge/native mode

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/player.js

@@ -425,6 +425,8 @@ export function togglePlay() {
   if(S.audio.src) S.audio.paused ? S.audio.play() : S.audio.pause();
 }
 
+export const isPlaying = () => HAS_BRIDGE ? _nativePlaying : !S.audio.paused;
+
 export function setPlayIcon(playing) {
   document.getElementById('play-icon').innerHTML = playing
     ? '<rect x="6" y="4" width="4" height="16"/><rect x="14" y="4" width="4" height="16"/>'