feat(player): sleep timer and delayed start via long-press on play/pause (#270)

Add scheduled pause and resume timers in the player store, cleared on stop
and track changes. Long-press opens a compact preset modal anchored above
the transport row; one-tap presets plus custom minutes. Portaled countdown
badge on the play button; clear the long-press click guard when the modal
closes so the first play/pause click works after scheduling.

src/locales/de.ts

@@ -1126,6 +1126,24 @@ export const deTranslation = {
     prev: 'Vorheriger Titel',
     play: 'Play',
     pause: 'Pause',
+    delayModalTitle: 'Timer',
+    delayPauseSection: 'Pause nach',
+    delayStartSection: 'Start nach',
+    delaySchedulePause: 'Pause planen',
+    delayScheduleStart: 'Start planen',
+    delayCancelPause: 'Pause-Timer abbrechen',
+    delayCancelStart: 'Start-Timer abbrechen',
+    delayInactivePause: 'Nur während der Wiedergabe verfügbar.',
+    delayInactiveStart: 'Nur in Pause mit geladenem Titel oder Radio.',
+    delayCustomMinutes: 'Eigene Dauer (Minuten)',
+    delayCustomPlaceholder: 'z. B. 2,5',
+    closeDelayModal: 'Schließen',
+    delayIn: 'in',
+    delayFmtSec: '{{n}} s',
+    delayFmtMin: '{{n}} Min',
+    delayFmtHr: '{{n}} Std',
+    delayCancel: 'Abbrechen',
+    delayApply: 'Übernehmen',
     next: 'Nächster Titel',
     repeat: 'Wiederholen',
     repeatOff: 'Aus',