feat: adds a lyrics widget instead of just a floating lrcbar

lyricswidget.h

@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: 2026 Gary Wang <opensource@blumia.net>
+//
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QListWidget;
+class QListWidgetItem;
+class QPropertyAnimation;
+QT_END_NAMESPACE
+
+class LyricsManager;
+class LyricsWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit LyricsWidget(QWidget *parent = nullptr);
+
+    void setLyricsManager(LyricsManager *mgr);
+    void updatePosition(qint64 position);
+
+private slots:
+    void onLyricsLoaded(bool success);
+
+private:
+    QListWidget *m_listWidget;
+    LyricsManager *m_lyricsManager = nullptr;
+    int m_lastHighlightIndex = -1;
+    QPropertyAnimation *m_scrollAnimation = nullptr;
+
+    void updateLyrics();
+    void highlightCurrentLine(int index);
+};
+