feat(web): refresh the current view after deleting a song or playlist

Deletes left the removed item visible because the list loaders are cached (getPlaylists
~3 min): deletePlaylist navigated to a still-cached list, and deleteSong only reloaded
playlists. Add refreshCurrentView() — drops the API cache and re-runs the active nav
entry's loader (playlists, playlist/album/artist detail, starred, home, …). deleteSong
calls it after the delete+rescan delay; deletePlaylist invalidates getPlaylists before
navigating. Bump SW cache to ns-v46.

Also record the post-1.2 work in the 1.2 changelog (importer Enter, search single-song
+ radio, NowPlaying order, official-audio artist-metadata match, JP-katakana album
artist fix, year back-fill, delete refresh).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/views/navigation.js

@@ -8,6 +8,7 @@ import { loadHomeData, loadAlbumRow, loadArtists, loadAlbums, loadGenreDetail }
 import { loadArtistDetail, loadArtistAllSongs, loadAlbumDetail, loadItunesAlbumDetail, loadPartialAlbumDetail } from './detail.js';
 import { loadPlaylists, loadPlaylistDetail, loadStarred, loadRandom } from './playlists.js';
 import { loadNewReleases, loadRecommendations } from './discover.js';
+import { invalidateApiCache } from '../api.js';
 
 // ─── NAVIGATION HISTORY ───
 export function _navSave() {
@@ -36,6 +37,27 @@ export function closeHeaderSearch() {
   clearTimeout(S._headerSearchTimer);
 }
 
+// Force-refresh the active view after a mutating action (delete a song / playlist, etc.): drop the
+// cached API responses so the reload is fresh, then re-run the current nav entry's loader.
+export function refreshCurrentView() {
+  invalidateApiCache();
+  const entry = S._navStack[S._navCursor];
+  if (!entry) return;
+  const { page, data } = entry;
+  switch (page) {
+    case 'home':            loadHomeData(true); break;
+    case 'albums':          loadAlbums(); break;
+    case 'artists':         loadArtists(); break;
+    case 'starred':         loadStarred(); break;
+    case 'random':          loadRandom(); break;
+    case 'playlists':       loadPlaylists(); break;
+    case 'playlist-detail': if (data) loadPlaylistDetail(data); break;
+    case 'album-detail':    if (data) loadAlbumDetail(data); break;
+    case 'artist-detail':   if (data) loadArtistDetail(data); break;
+    case 'genre-detail':    if (data) loadGenreDetail(data); break;
+  }
+}
+
 export function navigate(page, data=null) {
   closeHeaderSearch();
   document.querySelectorAll('.page').forEach(p => p.classList.remove('active'));