feat: configurable scrobble timing (15s / 30s / 1/3 / 2/3 / end)

Settings dropdown: 15s (default), 30s, 1/3 of duration, 2/3 of duration, song end.
Duration-based modes use s.duration from Navidrome metadata (always available).
'end' mode skips the timer and fires the scrobble in onEnded (web) / onQueueEnded (native).
Skipping a song never scrobbles in any mode — _cancelScrobble() still runs on skip/pause.

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

src/player/player.js

@@ -20,20 +20,33 @@ let _bridgeReady    = false; // true once onReady has fired; onQueueEnded is ign
 // ─── SCROBBLE ─────────────────────────────────────────────────────────────
 let _scrobbleTimer  = null;
 let _scrobbleId     = null;
-function _scheduleScrobble(id) {
-  if (_scrobbleId === String(id)) return;   // already scheduled for this track
+function _scheduleScrobble(id, durSec) {
+  if (_scrobbleId === String(id)) return;
   _cancelScrobble();
   _scrobbleId = String(id);
+  const mode = S.cfg.scrobbleMode || '15s';
+  if (mode === 'end') return; // fired explicitly in onEnded / onQueueEnded
+  let delay;
+  const dur = (durSec || 0) * 1000;
+  switch (mode) {
+    case '30s': delay = 30_000; break;
+    case '1/3': delay = dur > 0 ? Math.floor(dur / 3)     : 30_000; break;
+    case '2/3': delay = dur > 0 ? Math.floor(dur * 2 / 3) : 60_000; break;
+    default:    delay = 15_000; break;
+  }
   _scrobbleTimer = setTimeout(() => {
     if (_scrobbleId) api('scrobble', `&id=${_scrobbleId}&time=${Date.now()}`).catch(() => {});
     _scrobbleId = null;
-  }, 15_000);
+  }, delay);
 }
 function _cancelScrobble() {
   clearTimeout(_scrobbleTimer);
   _scrobbleTimer = null;
   _scrobbleId    = null;
 }
+function _scrobbleNow(s) {
+  if (s) api('scrobble', `&id=${s.id}&time=${Date.now()}`).catch(() => {});
+}
 
 // Unified duration / position / seek helpers — use native state when available,
 // fall back to HTMLAudioElement when not.
@@ -192,7 +205,7 @@ window.NSPlayer = {
     try {
       const s = S.queue[S.qIdx];
       if (!s) return;
-      _scheduleScrobble(s.id);
+      _scheduleScrobble(s.id, s.duration);
       if (S.radioMode && S.queue.length - S.qIdx < 5) fillRadioQueue();
     } catch (e) {}
   },
@@ -230,6 +243,7 @@ window.NSPlayer = {
     if (!_bridgeReady || Date.now() - _readyTs < 1500) return;
     _nativePlaying = false;
     setPlayIcon(false);
+    if (S.cfg.scrobbleMode === 'end') _scrobbleNow(S.queue[S.qIdx]);
     onEnded(); // handles repeat, radio top-up, and queue advance
   },
 
@@ -376,7 +390,7 @@ export function playCurrent() {
   updatePlayerUI(s, true);
   onNpSongChange(s.id);
   renderQueue();
-  _scheduleScrobble(s.id);   // 12s timer — cancelled on pause/skip
+  _scheduleScrobble(s.id, s.duration);
 
   const src = (_preId === s.id && _preUrl) ? _preUrl : streamUrl(s.id);
   _clearPreload();
@@ -691,7 +705,8 @@ export function nextSong() {
 
 export function onEnded() {
   if(S.repeat === 'one') { S.audio.currentTime = 0; S.audio.play(); return; }
-  _cancelScrobble();   // timer irrelevant now — song already finished
+  if (!HAS_BRIDGE && S.cfg.scrobbleMode === 'end') _scrobbleNow(S.queue[S.qIdx]);
+  _cancelScrobble();
   nextSong();
 }
 

src/ui/settings.js

@@ -50,6 +50,7 @@ export function openSettings() {
   document.getElementById('s-show-playcount').classList.toggle('on', !!S.cfg.showPlayCount);
   document.getElementById('s-show-romaji').classList.toggle('on', !!S.cfg.showRomaji);
   document.getElementById('s-cover-color-bg').classList.toggle('on', !!S.cfg.coverColorBg);
+  document.getElementById('s-scrobble-mode').value = S.cfg.scrobbleMode || '15s';
   _renderThemePicker();
   document.getElementById('settings-modal').classList.add('open');
   checkBackend();
@@ -131,6 +132,7 @@ export function saveSettings() {
   const romajiChanged  = S.cfg.showRomaji !== document.getElementById('s-show-romaji').classList.contains('on');
   S.cfg.showRomaji     = document.getElementById('s-show-romaji').classList.contains('on');
   S.cfg.coverColorBg   = document.getElementById('s-cover-color-bg').classList.contains('on');
+  S.cfg.scrobbleMode   = document.getElementById('s-scrobble-mode').value || '15s';
   updateNpColorMode();
   localStorage.setItem('ns_cfg', JSON.stringify(S.cfg));
   closeSettings(); toast('✅ Gespeichert');