feat: timer scrobble (12s), artist topsong star+menu, play count toggle

Scrobbling:
- Replace end-of-track scrobble with 12s timer approach
- Android: schedule on onTrackChanged, cancel on pause
- Web: schedule in playCurrent, cancel in togglePlay pause + onEnded
- Skip/new track resets the timer automatically (new song ID)

Artist top songs:
- Add star button and 3-dots context menu to every top song row
- Topsong grid expanded to 5 columns to fit action buttons

Settings — play count toggle:
- New "Bibliothek" section with toggle switch
- When on: shows play count in album/playlist song rows
- Artist page always shows play count regardless of toggle
- Persisted in ns_cfg localStorage

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

src/player.js

@@ -17,6 +17,24 @@ let _lastDurationMs = 0;   // ms — set by onPositionUpdate, used for seek calc
 let _skipping       = false;  // true briefly after a skip — suppresses the transient isPlaying:false
 let _skipTimer      = null;
 
+// ─── SCROBBLE ─────────────────────────────────────────────────────────────
+let _scrobbleTimer  = null;
+let _scrobbleId     = null;
+function _scheduleScrobble(id) {
+  if (_scrobbleId === String(id)) return;   // already scheduled for this track
+  _cancelScrobble();
+  _scrobbleId = String(id);
+  _scrobbleTimer = setTimeout(() => {
+    if (_scrobbleId) api('scrobble', `&id=${_scrobbleId}&time=${Date.now()}`).catch(() => {});
+    _scrobbleId = null;
+  }, 12_000);
+}
+function _cancelScrobble() {
+  clearTimeout(_scrobbleTimer);
+  _scrobbleTimer = null;
+  _scrobbleId    = null;
+}
+
 // Unified duration / position / seek helpers — use native state when available,
 // fall back to HTMLAudioElement when not.
 const _dur  = () => HAS_BRIDGE ? _lastDurationMs / 1000 : (S.audio.duration  || 0);
@@ -142,6 +160,7 @@ window.NSPlayer = {
       }
       const prev  = _nativePlaying;
       _nativePlaying = state.isPlaying;
+      if (!state.isPlaying && !state.isBuffering) _cancelScrobble();
       if (state.isPlaying && S.previewCurrent) stopPreview(false);
       if (state.isPlaying !== prev) {
         setPlayIcon(state.isPlaying);
@@ -189,10 +208,6 @@ window.NSPlayer = {
       // doesn't match what native is actually playing, the queues are mismatched.
       // Allow through if reason='queue' (we triggered a setQueue) or if no IDs to compare.
       if (liveId && S.queue[idx]?.id && String(liveId) !== String(S.queue[idx].id) && p.reason !== 'queue') return;
-      // Scrobble the track that just finished (auto-advance = it played to completion).
-      if (p.reason === 'auto' && S.queue[S.qIdx]?.id) {
-        api('scrobble', `&id=${S.queue[S.qIdx].id}&time=${Date.now()}`).catch(() => {});
-      }
       const indexChanged = (idx !== S.qIdx);
       S.qIdx = idx;
       const s = S.queue[S.qIdx];
@@ -200,6 +215,8 @@ window.NSPlayer = {
       updatePlayerUI(s, true);
       onNpSongChange(s.id);
       if (indexChanged) renderQueue();
+      // Schedule scrobble — fires after 12s of uninterrupted playback.
+      _scheduleScrobble(s.id);
       // Radio mode: top up the queue when running low.
       // fillRadioQueue sends addToQueue to native internally — no re-send here.
       if (S.radioMode && S.queue.length - S.qIdx < 5) fillRadioQueue();
@@ -365,6 +382,7 @@ export function playCurrent() {
   updatePlayerUI(s, true);
   onNpSongChange(s.id);
   renderQueue();
+  _scheduleScrobble(s.id);   // 12s timer — cancelled on pause/skip
 
   const src = (_preId === s.id && _preUrl) ? _preUrl : streamUrl(s.id);
   _clearPreload();
@@ -516,7 +534,10 @@ export function cancelMusicAutoplay() { _playGen++; S.audio.pause(); }
 
 export function togglePlay() {
   if (HAS_BRIDGE) { _nsBridge('togglePlay'); return; }
-  if(S.audio.src) S.audio.paused ? S.audio.play() : S.audio.pause();
+  if(S.audio.src) {
+    if (S.audio.paused) { S.audio.play(); }
+    else { S.audio.pause(); _cancelScrobble(); }
+  }
 }
 
 export const isPlaying = () => HAS_BRIDGE ? _nativePlaying : !S.audio.paused;
@@ -618,8 +639,7 @@ export function nextSong() {
 
 export function onEnded() {
   if(S.repeat === 'one') { S.audio.currentTime = 0; S.audio.play(); return; }
-  // Scrobble the track that just finished (web path).
-  if (S.queue[S.qIdx]?.id) api('scrobble', `&id=${S.queue[S.qIdx].id}&time=${Date.now()}`).catch(() => {});
+  _cancelScrobble();   // timer irrelevant now — song already finished
   nextSong();
 }