fix: restart skip grace period on isPlaying:true to suppress multi-fire buffering during seek

src/player.js

@@ -98,9 +98,17 @@ window.NSPlayer = {
   onPlaybackStateChanged(stateJson) {
     try {
       const state = JSON.parse(stateJson);
-      if (state.isPlaying) { _skipping = false; clearTimeout(_skipTimer); }
-      // Suppress the transient isPlaying:false emitted by the native player during track transitions.
-      if (!state.isPlaying && _skipping) return;
+      if (_skipping) {
+        if (state.isPlaying) {
+          // isPlaying:true during skip/seek — restart grace period instead of clearing immediately,
+          // so a follow-up buffering false event is also suppressed.
+          clearTimeout(_skipTimer);
+          _skipTimer = setTimeout(() => { _skipping = false; }, 600);
+        } else {
+          // Suppress transient isPlaying:false during track transitions / seeks.
+          return;
+        }
+      }
       const prev  = _nativePlaying;
       _nativePlaying = state.isPlaying;
       if (state.isPlaying !== prev) {