feat: redesign sleep timer custom input as clickable row with inline edit

src/abs.js

@@ -317,6 +317,7 @@ export function absSleepIn(minutes) {
   clearTimeout(_sleepTimer); clearInterval(_sleepTick);
   _sleepTimer = null; _sleepTick = null; _sleepEndTime = null;
   document.getElementById('abs-sleep-picker')?.classList.remove('open');
+  document.getElementById('abs-sleep-custom-row')?.classList.remove('active');
   if (!minutes) { S.absPlayer.sleepRemaining = null; _renderSleepBtn(); return; }
   _sleepEndTime = Date.now() + minutes * 60_000;
   _updateSleepTick();