fix: reconcile native state on app foreground; refresh playlist after delete

- Call reconcileNativeState() on visibilitychange→visible so the player UI
  updates immediately when the user opens the app after a background auto-advance,
  before deferred evaluateJavascript callbacks have had a chance to fire
- After deleteSong() succeeds, refresh the active playlist view (grid or detail)
  with a 2s delay to let Navidrome's background scan complete

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

src/main.js

@@ -9,7 +9,7 @@ import {
   initProgressScrub, updateProgress, updatePreviewProgress, stopPreview,
   toggleRadioMode, starCurrent, downloadCurrent, renderQueue, playPreview,
   toggleStar, dlSongLocal, _applyRadioBtn, _applyShuffleRepeat, _restoreLastPlayed, setPlayIcon,
-  npToggleStar, updateMediaSession, updateNpColorMode,
+  npToggleStar, updateMediaSession, updateNpColorMode, reconcileNativeState,
 } from './player.js';
 import {
   navigate, _navGoBack, _navLoad, onHeaderSearch, closeHeaderSearch,
@@ -174,6 +174,7 @@ window.addEventListener('load', () => {
   let _wasPlayingBeforeHide = false;
 
   function _onForeground() {
+    reconcileNativeState();
     const s = S.queue[S.qIdx];
     if(!s) return;
     updateMediaSession(s);