feat: playlist art fix + Play/Shuffle buttons in context header

- Fix playlist art: API returns images/images150/images300 arrays, not
  image_rectangle; update Rust model and Qt header to use images300 →
  images150 → images with fallback
- Add Play (▶) and Shuffle (⇄) buttons to the album/playlist header;
  Play starts from track 1, Shuffle enables shuffle mode and plays from
  a randomised position

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

rust/src/api/models.rs

@@ -183,7 +183,12 @@ pub struct PlaylistDto {
     pub duration: Option<i64>,
     pub description: Option<String>,
     pub owner: Option<PlaylistOwnerDto>,
-    pub image_rectangle: Option<Vec<String>>,
+    /// 4-cover mosaic at 300 px (preferred)
+    pub images300: Option<Vec<String>>,
+    /// 4-cover mosaic at 150 px (fallback)
+    pub images150: Option<Vec<String>>,
+    /// 4-cover mosaic at 50 px (last resort)
+    pub images: Option<Vec<String>>,
     pub tracks: Option<TracksWrapper>,
 }
 

src/list/tracks.cpp

@@ -84,6 +84,17 @@ void Tracks::setPlayingTrackId(qint64 id)
     m_model->setPlayingId(id);
 }
 
+void Tracks::playAll(bool shuffle)
+{
+    const QJsonArray tracks = m_model->currentTracksJson();
+    if (tracks.isEmpty()) return;
+    m_queue->setShuffle(shuffle);
+    m_queue->setContext(tracks, 0);
+    const qint64 firstId = static_cast<qint64>(m_queue->current()["id"].toDouble());
+    if (firstId > 0)
+        emit playTrackRequested(firstId);
+}
+
 
 void Tracks::onDoubleClicked(const QModelIndex &index)
 {

src/list/tracks.hpp

@@ -28,6 +28,10 @@ namespace List
         /// Called when the backend fires EV_TRACK_CHANGED so the playing row is highlighted.
         void setPlayingTrackId(qint64 id);
 
+        /// Start playing all tracks in the current view from the beginning.
+        /// If shuffle is true, enables shuffle mode before starting.
+        void playAll(bool shuffle = false);
+
         /// Set which playlist is currently displayed (0 = none).
         /// isOwned controls whether "Remove from this playlist" is shown.
         void setPlaylistContext(qint64 playlistId, bool isOwned = false);

src/view/maincontent.cpp

@@ -1,6 +1,7 @@
 #include "maincontent.hpp"
 
 #include <QVBoxLayout>
+#include <QPushButton>
 
 MainContent::MainContent(QobuzBackend *backend, PlayQueue *queue, QWidget *parent)
     : QWidget(parent)
@@ -31,6 +32,11 @@ MainContent::MainContent(QobuzBackend *backend, PlayQueue *queue, QWidget *paren
     tracksLayout->addWidget(m_header);
     tracksLayout->addWidget(m_tracks, 1);
 
+    QObject::connect(m_header->playButton(),    &QPushButton::clicked,
+                     [this] { m_tracks->playAll(false); });
+    QObject::connect(m_header->shuffleButton(), &QPushButton::clicked,
+                     [this] { m_tracks->playAll(true); });
+
     m_albumList  = new AlbumListView(this);
     m_artistList = new ArtistListView(this);
     m_artistView = new ArtistView(this);

src/view/trackcontextheader.hpp

@@ -6,6 +6,7 @@
 #include <QLabel>
 #include <QFont>
 #include <QPixmap>
+#include <QPushButton>
 #include <QStringList>
 #include <QJsonObject>
 #include <QJsonArray>
@@ -15,14 +16,14 @@
 #include <QUrl>
 
 /// Header strip shown above the track list when an album or playlist is open.
-/// Displays album art, title, subtitle, and metadata.
+/// Displays album art, title, subtitle, metadata, and Play/Shuffle buttons.
 class TrackContextHeader : public QWidget
 {
 public:
     explicit TrackContextHeader(QWidget *parent = nullptr)
         : QWidget(parent)
     {
-        setFixedHeight(140);
+        setFixedHeight(148);
 
         auto *hlay = new QHBoxLayout(this);
         hlay->setContentsMargins(12, 8, 12, 8);
@@ -61,7 +62,35 @@ public:
         m_meta->setPalette(mp);
         vlay->addWidget(m_meta);
 
-        vlay->addStretch();
+        // Play / Shuffle buttons
+        auto *btnRow = new QHBoxLayout;
+        btnRow->setSpacing(8);
+        btnRow->setContentsMargins(0, 4, 0, 0);
+
+        static const QString btnBase = QStringLiteral(
+            "QPushButton {"
+            "  padding: 5px 16px;"
+            "  border-radius: 4px;"
+            "  font-weight: bold;"
+            "}"
+            "QPushButton:hover { opacity: 0.85; }"
+        );
+
+        m_playBtn = new QPushButton(tr("▶  Play"), info);
+        m_playBtn->setStyleSheet(btnBase +
+            QStringLiteral("QPushButton { background: #FFB232; color: #000; }"
+                           "QPushButton:pressed { background: #e09e28; }"));
+        btnRow->addWidget(m_playBtn);
+
+        m_shuffleBtn = new QPushButton(tr("⇄  Shuffle"), info);
+        m_shuffleBtn->setStyleSheet(btnBase +
+            QStringLiteral("QPushButton { background: #2a2a2a; color: #FFB232; border: 1px solid #FFB232; }"
+                           "QPushButton:pressed { background: #333; }"));
+        btnRow->addWidget(m_shuffleBtn);
+
+        btnRow->addStretch();
+        vlay->addLayout(btnRow);
+
         hlay->addWidget(info, 1);
 
         m_nam = new QNetworkAccessManager(this);
@@ -76,6 +105,9 @@ public:
         });
     }
 
+    QPushButton *playButton()    { return m_playBtn; }
+    QPushButton *shuffleButton() { return m_shuffleBtn; }
+
     void setAlbum(const QJsonObject &album)
     {
         m_title->setText(album["title"].toString());
@@ -93,9 +125,14 @@ public:
         m_subtitle->setText(desc.isEmpty() ? owner : desc);
         m_meta->setText(buildPlaylistMeta(playlist));
 
-        const QJsonArray imgs = playlist["image_rectangle"].toArray();
-        if (!imgs.isEmpty())
-            fetchUrl(imgs.first().toString());
+        // Try images300 → images150 → images (API returns mosaic arrays, not image_rectangle)
+        const QJsonArray imgs300 = playlist["images300"].toArray();
+        const QJsonArray imgs150 = playlist["images150"].toArray();
+        const QJsonArray imgs    = playlist["images"].toArray();
+        const QJsonArray &best   = !imgs300.isEmpty() ? imgs300
+                                 : !imgs150.isEmpty() ? imgs150 : imgs;
+        if (!best.isEmpty())
+            fetchUrl(best.first().toString());
         else
             m_art->setPixmap(QPixmap());
 
@@ -140,7 +177,6 @@ private:
         if (tracks > 0) parts << QStringLiteral("%1 tracks").arg(tracks);
         const int dur = static_cast<int>(album["duration"].toDouble());
         if (dur > 0) parts << formatDuration(dur);
-        // Resolution: e.g. "24-bit / 96 kHz"
         const int    bits = album["maximum_bit_depth"].toInt();
         const double rate = album["maximum_sampling_rate"].toDouble();
         if (bits > 0 && rate > 0) {
@@ -166,6 +202,8 @@ private:
     QLabel                *m_title      = nullptr;
     QLabel                *m_subtitle   = nullptr;
     QLabel                *m_meta       = nullptr;
+    QPushButton           *m_playBtn    = nullptr;
+    QPushButton           *m_shuffleBtn = nullptr;
     QNetworkAccessManager *m_nam        = nullptr;
     QString                m_currentArtUrl;
 };