feat: notification 'Öffnen' routes to album for track/album downloads

- Single track and album downloads now navigate to the album page
- Artist downloads continue to navigate to the artist page
- Button label changes to 'Zum Album →' or 'Zum Künstler →' accordingly
- album name stored in job metadata so it survives until poll completes
- Search uses exact album+artist match, falls back to album-name-only

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

src/ui.js

@@ -298,7 +298,7 @@ export async function executeDownload() {
     discTotal:   S.downloadTarget.discCount      || undefined,
     durationMs:  S.downloadTarget.trackTimeMillis || undefined,
   };
-  addJob(jobId, payload.title, payload.artist, payload.type);
+  addJob(jobId, payload.title, payload.artist, payload.type, payload.album);
   try {
     const res = await fetch(`${S.cfg.backendUrl}/api/download`, {
       method: 'POST', headers: {'Content-Type':'application/json'},
@@ -489,9 +489,12 @@ function _renderNotifList() {
     const missingHtml = n.missing?.length
       ? `<details class="notif-failed"><summary>${n.missing.length} Track${n.missing.length > 1 ? 's' : ''} nicht in Navidrome gefunden</summary><ul>${n.missing.map(f => `<li>${esc(f)}</li>`).join('')}</ul></details>`
       : '';
-    const hasNav = n.status === 'done' && ((n.navType === 'playlist' && n.navId) || n.navArtist);
+    const hasNav = n.status === 'done' && ((n.navType === 'playlist' && n.navId) || n.navArtist || n.navAlbum);
+    const navLabel = n.navType === 'artist' ? 'Zum Künstler →'
+                   : (n.navType === 'track' || n.navType === 'album') ? 'Zum Album →'
+                   : 'Öffnen →';
     const navBtn = hasNav
-      ? `<button class="notif-nav-btn" onclick="_notifNavigate('${esc(n.id)}')">Öffnen →</button>`
+      ? `<button class="notif-nav-btn" onclick="_notifNavigate('${esc(n.id)}')">${navLabel}</button>`
       : '';
     return `<div class="notif-card${n.read ? '' : ' unread'}">
       <div class="notif-card-top">
@@ -525,9 +528,31 @@ export async function _notifNavigate(notifId) {
     return;
   }
 
+  const norm = s => s?.toLowerCase().trim() || '';
+
+  // Track or album download → find album in Navidrome and navigate there.
+  if (n.navType === 'track' || n.navType === 'album') {
+    const albumQuery = n.navAlbum || n.navTitle;
+    if (albumQuery) {
+      try {
+        const r = await api('search3', `&query=${encodeURIComponent(albumQuery)}&artistCount=0&albumCount=10&songCount=0`);
+        const albums = r.searchResult3?.album || [];
+        // Prefer exact album + artist match, fall back to album-name-only match.
+        const match = albums.find(a => norm(a.name) === norm(albumQuery) && norm(a.artist) === norm(n.navArtist))
+                   || albums.find(a => norm(a.name) === norm(albumQuery))
+                   || albums[0];
+        if (match) {
+          navigate('album-detail', { id: match.id, name: match.name, artist: match.artist || '', artistId: match.artistId || '', coverArt: match.coverArt || '' });
+          return;
+        }
+      } catch {}
+    }
+    toast('Album nicht gefunden — Library-Scan nötig?');
+    return;
+  }
+
   if (n.navArtist) {
     try {
-      const norm = s => s?.toLowerCase().trim() || '';
       const r = await api('search3', `&query=${encodeURIComponent(n.navArtist)}&artistCount=5&albumCount=0&songCount=0`);
       const artists = r.searchResult3?.artist || [];
       const match = artists.find(a => norm(a.name) === norm(n.navArtist)) || artists[0];
@@ -543,8 +568,8 @@ function _parseFailedTracks(log) {
 }
 
 // ─── JOBS ───
-function addJob(id, title, artist, type) {
-  S.jobs[id] = {title, artist, type: type || '', progress:0, status:'pending'};
+function addJob(id, title, artist, type, album) {
+  S.jobs[id] = {title, artist, type: type || '', album: album || '', progress:0, status:'pending'};
   renderJobs();
 }
 function updateJob(id, status, msg, progress) {
@@ -603,6 +628,7 @@ async function pollJob(jobId) {
         read: false,
         navType: job?.type || '',
         navArtist: job?.artist || '',
+        navAlbum: job?.album || '',
         navTitle: title,
       });
       if (d.status === 'done') {