Workcat: cute desktop cat, no window closing

Reworks the example into a pure desktop-pet: the cat wanders, sits, grooms,
stretches, dashes and naps, reacts to petting and dragging, and follows the
cursor with its eyes. The window-scanning and Accessibility code is gone.

The cat is drawn from rounded primitives plus Shape paths in a fixed 100x90
design space, so it scales cleanly to any size.

Linux/X11 is the primary target: the tray is optional, Wayland gets a warning,
and WORKCAT_X11_BYPASS / WORKCAT_OPAQUE cover uncooperative window managers.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/traycontroller.cpp

@@ -0,0 +1,71 @@
+#include "traycontroller.h"
+#include "catcontroller.h"
+
+#include <QCoreApplication>
+#include <QPainter>
+#include <QPainterPath>
+#include <QLoggingCategory>
+
+TrayController::TrayController(CatController *cat, QObject *parent)
+    : QObject(parent)
+    , m_cat(cat)
+{
+    QMenu *tricks = m_menu.addMenu(tr("Tricks"));
+    const struct { const char *label; CatController::Mood mood; } entries[] = {
+        { QT_TR_NOOP("Sit"), CatController::Mood::Sitting },
+        { QT_TR_NOOP("Groom"), CatController::Mood::Grooming },
+        { QT_TR_NOOP("Stretch"), CatController::Mood::Stretching },
+        { QT_TR_NOOP("Dash"), CatController::Mood::Running },
+        { QT_TR_NOOP("Nap"), CatController::Mood::Sleeping },
+    };
+    for (const auto &e : entries) {
+        const auto mood = e.mood;
+        tricks->addAction(tr(e.label), this, [this, mood] { m_cat->doTrick(mood); });
+    }
+
+    m_pauseAction = m_menu.addAction(tr("Let the cat sleep"));
+    m_pauseAction->setCheckable(true);
+    connect(m_pauseAction, &QAction::toggled, m_cat, &CatController::setPaused);
+    connect(m_cat, &CatController::pausedChanged, this, [this] {
+        m_pauseAction->setChecked(m_cat->paused());
+    });
+
+    m_menu.addAction(tr("Settings…"), this, &TrayController::settingsRequested);
+    m_menu.addSeparator();
+    m_menu.addAction(tr("Quit Workcat"), qApp, &QCoreApplication::quit);
+
+    m_tray.setIcon(makeIcon());
+    m_tray.setToolTip(tr("Workcat"));
+    m_tray.setContextMenu(&m_menu);
+
+    // Not every X11 desktop runs a status-notifier host. Without a tray the
+    // cat itself is the only entry point, so say so instead of failing mutely.
+    if (QSystemTrayIcon::isSystemTrayAvailable())
+        m_tray.show();
+    else
+        qWarning("Workcat: no system tray on this desktop. Right-click the cat for settings.");
+}
+
+QIcon TrayController::makeIcon()
+{
+    QPixmap pm(44, 44);
+    pm.fill(Qt::transparent);
+    QPainter p(&pm);
+    p.setRenderHint(QPainter::Antialiasing);
+    p.setPen(Qt::NoPen);
+    p.setBrush(Qt::black);
+
+    QPainterPath path;
+    path.addRoundedRect(QRectF(5, 12, 34, 28), 14, 14);
+    path.moveTo(8, 22); path.lineTo(9, 5); path.lineTo(21, 14); path.closeSubpath();
+    path.moveTo(36, 22); path.lineTo(35, 5); path.lineTo(23, 14); path.closeSubpath();
+    p.drawPath(path);
+
+    p.setBrush(Qt::white);
+    p.drawEllipse(QRectF(13, 22, 6, 7));
+    p.drawEllipse(QRectF(25, 22, 6, 7));
+
+    QIcon icon(pm);
+    icon.setIsMask(true);
+    return icon;
+}