feat: add playlist browse/search discovery and follow controls

src/view/genrebrowser.hpp

@@ -4,8 +4,14 @@
 #include "albumlistview.hpp"
 
 #include <QComboBox>
+#include <QLabel>
+#include <QLineEdit>
 #include <QJsonArray>
 #include <QJsonObject>
+#include <QSet>
+#include <QPushButton>
+#include <QStackedWidget>
+#include <QTreeWidget>
 #include <QWidget>
 
 class GenreBrowserView : public QWidget
@@ -13,24 +19,57 @@ class GenreBrowserView : public QWidget
     Q_OBJECT
 
 public:
+    enum class BrowseMode {
+        Genres,
+        PlaylistSearch,
+    };
+
     explicit GenreBrowserView(QobuzBackend *backend, QWidget *parent = nullptr);
 
     void ensureGenresLoaded();
+    void setBrowseMode(BrowseMode mode);
 
 signals:
     void albumSelected(const QString &albumId);
     void artistSelected(qint64 artistId);
+    void playlistSelected(qint64 playlistId);
 
 private slots:
     void onGenresLoaded(const QJsonObject &result);
     void onFeaturedAlbumsLoaded(const QJsonObject &result);
+    void onFeaturedPlaylistsLoaded(const QJsonObject &result);
+    void onDiscoverPlaylistsLoaded(const QJsonObject &result);
+    void onPlaylistSearchLoaded(const QJsonObject &result);
     void onSelectionChanged();
     void onAlbumContextMenu(const QPoint &pos);
+    void onPlaylistActivated(QTreeWidgetItem *item, int column);
+    void onPlaylistContextMenu(const QPoint &pos);
 
 private:
     QobuzBackend *m_backend = nullptr;
+    QLabel *m_browseLabel = nullptr;
+    QLabel *m_genreLabel = nullptr;
+    QLabel *m_typeLabel = nullptr;
+    QLabel *m_playlistSearchLabel = nullptr;
+    QWidget *m_gapAfterKind = nullptr;
+    QWidget *m_gapAfterGenre = nullptr;
+    QComboBox *m_kindCombo = nullptr;
     QComboBox *m_genreCombo = nullptr;
     QComboBox *m_typeCombo = nullptr;
+    QLineEdit *m_playlistSearchBox = nullptr;
+    QPushButton *m_playlistSearchBtn = nullptr;
+    QStackedWidget *m_resultsStack = nullptr;
     AlbumListView *m_albumList = nullptr;
+    QTreeWidget *m_playlistList = nullptr;
+    BrowseMode m_mode = BrowseMode::Genres;
     bool m_genresLoaded = false;
+    int m_lastGenreComboIndex = 0;
+    QSet<qint64> m_multiGenreIds;
+
+    void refreshModeUi();
+    void refreshGenreTypeChoices();
+    QString currentGenreIds() const;
+    bool chooseMultiGenres();
+    void updateMultiGenreLabel();
+    void setPlaylistItems(const QJsonArray &items);
 };