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/ui.js

@@ -4,7 +4,7 @@ import { api, coverUrl, ndAuth, fetchRomajiIndex, romajiConvert, romajiLookup, i
 import { THEMES, applyTheme, getCurrentThemeId } from './themes.js';
 // Circular imports — safe (only used inside function bodies)
 import { playQueue, dlSongLocal, toggleStar, togglePlay, renderQueue, syncNpStar, updateStarBtn, npToggleStar, playCurrent, _syncNpDirect, setPlayIcon, nativeInsertAt, refreshDisplayMode, updateNpColorMode } from './player.js';
-import { navigate, loadPlaylists } from './views.js';
+import { navigate, loadPlaylists, loadPlaylistDetail } from './views.js';
 
 // ─── SIDEBAR ───
 export function openSidebar() {
@@ -536,6 +536,13 @@ export async function deleteSong() {
     if (!r.ok) throw new Error(d.error || `HTTP ${r.status}`);
     toast(`🗑 "${s.title}" gelöscht`);
     closeInfoModal();
+    // Refresh playlist views after Navidrome's background scan has a chance to finish
+    setTimeout(() => {
+      if (document.getElementById('page-playlists')?.classList.contains('active'))
+        loadPlaylists();
+      else if (document.getElementById('page-playlist-detail')?.classList.contains('active') && S._currentPlaylist)
+        loadPlaylistDetail(S._currentPlaylist);
+    }, 2000);
   } catch (e) {
     status.textContent = '❌ Fehler: ' + e.message;
   }