fix: don't auto-resume audio on tab/app focus if user explicitly paused

src/main.js

@@ -162,6 +162,8 @@ window.addEventListener('load', () => {
 
   S.audio.volume = 0.5;
 
+  let _wasPlayingBeforeHide = false;
+
   function _onForeground() {
     const s = S.queue[S.qIdx];
     if(!s) return;
@@ -170,14 +172,15 @@ window.addEventListener('load', () => {
     // Skip when native is active: Media3 owns the system media session.
     if(navigator.mediaSession && !S._trackChanging && !window.NSBridge)
       navigator.mediaSession.playbackState = S.audio.paused ? 'paused' : 'playing';
-    // If audio was playing before backgrounding but is now paused (OS kill), try to resume.
-    // No-op when native (S.audio.src is empty; native handles its own recovery).
+    // Only auto-resume if audio was actually playing when the page hid (OS-killed buffer).
+    // If the user explicitly paused, _wasPlayingBeforeHide is false — don't restart.
     if(!S.audio.paused) return;
-    if(s && S.audio.src) S.audio.play().catch(() => { S._trackChanging = false; });
+    if(s && S.audio.src && _wasPlayingBeforeHide) S.audio.play().catch(() => { S._trackChanging = false; });
   }
 
   document.addEventListener('visibilitychange', () => {
-    if(document.visibilityState === 'visible') _onForeground();
+    if(document.visibilityState === 'hidden') _wasPlayingBeforeHide = !S.audio.paused;
+    else if(document.visibilityState === 'visible') _onForeground();
   });
   // pageshow fires more reliably than visibilitychange on iOS PWA and Samsung
   window.addEventListener('pageshow', e => { if(e.persisted) _onForeground(); });