chore: close session — commit all remaining pre-existing state

Finalize all non-artifact changes accumulated from other sessions:
- config updates, recipe changes, source edits, patches
- pkgar/cache artifacts intentionally excluded (build outputs)

This is the maximum achievable scope for this session.
Hardware-accelerated KDE blocked by: QML gate, KWin/Plasma builds,
hardware GPU validation — all require build system + physical GPU.

local/recipes/kde/kf6-prison/source/tests/barcodeexamplewidget.cpp

@@ -0,0 +1,89 @@
+/*
+    SPDX-FileCopyrightText: 2010-2014 Sune Vuorela <sune@vuorela.dk>
+
+    SPDX-License-Identifier: MIT
+*/
+
+#include "barcodeexamplewidget.h"
+// Qt
+#include <QDrag>
+#include <QGuiApplication>
+#include <QMimeData>
+#include <QPainter>
+#include <QResizeEvent>
+#include <QScreen>
+
+using namespace Prison;
+
+BarcodeExampleWidget::BarcodeExampleWidget(std::optional<Barcode> barcode, QWidget *parent)
+    : QWidget(parent)
+    , m_barcode(std::move(barcode))
+{
+    if (!barcode) {
+        qDebug() << "unsupported barcode, showing a black square";
+    }
+}
+
+BarcodeExampleWidget::BarcodeExampleWidget(BarcodeType barcode, QWidget *parent)
+    : BarcodeExampleWidget(Barcode::create(barcode), parent)
+{
+}
+
+void BarcodeExampleWidget::setData(const QString &data)
+{
+    if (m_barcode) {
+        m_barcode->setData(data);
+        updateGeometry();
+        repaint();
+    }
+}
+
+void BarcodeExampleWidget::paintEvent(QPaintEvent *event)
+{
+    QPainter painter(this);
+    if (m_barcode) {
+        QRect targetrect = rect();
+        QImage image = m_barcode->toImage(targetrect.size());
+        if (!image.isNull()) {
+            QRectF rect(targetrect.left() + targetrect.width() / 2 - image.size().width() / 2,
+                        targetrect.top() + targetrect.height() / 2 - image.size().height() / 2,
+                        targetrect.size().width(),
+                        targetrect.height());
+            painter.drawImage(rect.topLeft(), image, image.rect());
+        } else {
+            painter.fillRect(QRectF(QPointF(0, 0), size()), Qt::cyan);
+        }
+    } else {
+        painter.fillRect(QRectF(QPointF(0, 0), size()), Qt::black);
+    }
+    QWidget::paintEvent(event);
+}
+
+void BarcodeExampleWidget::resizeEvent(QResizeEvent *event)
+{
+    updateGeometry();
+    repaint();
+    QWidget::resizeEvent(event);
+}
+
+void BarcodeExampleWidget::mousePressEvent(QMouseEvent *event)
+{
+    if (m_barcode && event->buttons() & Qt::LeftButton) {
+        QMimeData *data = new QMimeData();
+        data->setImageData(m_barcode->toImage(rect().size()));
+        QDrag *drag = new QDrag(this);
+        drag->setMimeData(data);
+        drag->exec();
+    } else {
+        QWidget::mousePressEvent(event);
+    }
+}
+
+QSize BarcodeExampleWidget::minimumSizeHint() const
+{
+    if (m_barcode)
+        return m_barcode->preferredSize(QGuiApplication::primaryScreen()->devicePixelRatio()).toSize();
+    return QSize(10, 10);
+}
+
+BarcodeExampleWidget::~BarcodeExampleWidget() = default;