feat: wire NSBridge fully + HD artwork + disable watchdog in wrapper mode

player.js
- Replace `_native()` function with `const HAS_BRIDGE` (evaluated once at
  module load so bridge detection is rock-solid)
- Add `buildTrackList()` — maps S.queue to NSBridge Track array with 1024px
  artworkUrl so lock-screen cover is crisp on high-DPR displays
- Add `_pushQueueIfBridge()` — called by `fillRadioQueue()` so radio top-ups
  are pushed to ExoPlayer in real time (fixes autoplay gap after radio refill)
- `playQueue`: route through `NSBridge.setQueue` when bridge present; old
  `S.audio` path retained for browser/PWA fallback
- `playCurrent`: `NSBridge.seekToIndex + play` in bridge mode
- `nextSong / prevSong / togglePlay / onEnded`: delegate to bridge, skip local
  S.qIdx manipulation (native sends onTrackChanged callback instead)
- `seekTo / _initBarScrub`: use `_lastDurationMs` for ms-accurate seeks
- `onTrackChanged`: guard with `p.index !== S.qIdx` to avoid redundant redraws
- `updateMediaSession`: artwork sizes 96/300/512 → 256/512/1024
- Player-bar cover: 100 → 256px; NP cover/bg: 400 → 1024px;
  queue items: 60 → 128px; preload hint sizes: 96/300/512 → 256/512/1024

main.js
- Wrap watchdog setInterval in `typeof window.NSBridge === 'undefined'` guard;
  the foreground service keeps ExoPlayer alive — JS watchdog not needed there

views.js
- Album detail / playlist detail covers: 300 → 512px
- Playlist grid cards: 200 → 512px
- Search result song cards: 200 → 256px
- Artist top-songs / all-songs thumbnails: 60 → 128px
- Partial album art in _renderArtistAlbums: 300 → 512px

components.js
- makeAlbumCard: 200 → 512px
- makeSongItem: 60 → 128px

nowplaying.js
- NP queue items: 60 → 128px
- NP action sheet thumb: 80 → 256px

sw.js
- Bump CACHE to ns-v41 so stale small-cover entries are evicted on next load

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

src/nowplaying.js

@@ -230,7 +230,7 @@ export function renderNpQueue() {
   S.queue.forEach((s, i) => {
     const item = document.createElement('div');
     item.className = 'np-queue-item' + (i===S.qIdx ? ' nq-active' : '');
-    const cv = coverUrl(s.coverArt, 60);
+    const cv = coverUrl(s.coverArt, 128);
     item.innerHTML = `<div class="nqi-num">${i+1}</div><div class="nqi-art">${cv ? `<img src="${cv}">` : '♪'}</div><div class="nqi-info"><div class="nqi-title">${esc(s.title)}</div><div class="nqi-artist">${esc(s.artist||'')}</div></div>`;
     item.onclick = () => { S.qIdx=i; playCurrent(); switchNpTab('player'); };
     el.appendChild(item);
@@ -254,7 +254,7 @@ export function npGoAlbum() {
 // ─── NP ACTION SHEET ───
 export function openNpMenu() {
   const s = S.queue[S.qIdx]; if(!s) return;
-  const cv = coverUrl(s.coverArt, 80);
+  const cv = coverUrl(s.coverArt, 256);
   document.getElementById('np-sheet-song').innerHTML = `
     <div class="thumb">${cv ? `<img src="${cv}">` : '<div style="width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:22px">🎵</div>'}</div>
     <div><div class="title">${esc(s.title)}</div><div class="sub">${esc(s.artist||'')}${s.album?' · '+esc(s.album):''}</div></div>`;