fix: artistview nullptr connect warning + album version in header

- Move updateToggleText() after m_list creation to avoid null connects
- Show version (e.g. "Deluxe") in album header title

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

src/view/trackcontextheader.hpp

@@ -119,7 +119,9 @@ public:
 
     void setAlbum(const QJsonObject &album)
     {
-        m_title->setText(album["title"].toString());
+        const QString base = album["title"].toString();
+        const QString ver  = album["version"].toString().trimmed();
+        m_title->setText(ver.isEmpty() ? base : base + QStringLiteral(" (") + ver + QLatin1Char(')'));
         m_artistId = static_cast<qint64>(album["artist"].toObject()["id"].toDouble());
         m_subtitle->setText(album["artist"].toObject()["name"].toString());
         m_subtitle->setEnabled(m_artistId > 0);