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>

README.md

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+# Workcat (Qt Quick / CMake example)
+
+A little cat that wanders along the bottom edge of your screen, sits down,
+grooms itself, stretches, dashes off and takes naps. Drag it around, click to
+pet it, and it purrs. It does nothing else — no window closing, no monitoring.
+
+Inspired by [workcat.app](https://workcat.app/en/), rebuilt as a plain Qt 6 /
+QML project. Primary target is **Linux / X11**; development happens on macOS and
+both are supported by the same code.
+
+## Layout
+
+| Path | Purpose |
+|---|---|
+| `CMakeLists.txt` | `qt_add_executable` + `qt_add_qml_module` (URI `Workcat`), macOS bundle, `.desktop` file on Linux |
+| `src/main.cpp` | Wires `AppSettings` and `CatController` into the QML engine, warns on Wayland |
+| `src/catcontroller.*` | Mood machine (walk, run, sit, groom, stretch, sleep, love, alert), movement tick, cursor tracking |
+| `src/appsettings.*` | `QSettings`-backed coat, size, pace, eye tracking, pet counter |
+| `src/platforminfo.*` | QML singleton `Platform`: platform name plus the two X11 escape hatches |
+| `src/traycontroller.*` | Tray icon and menu, silently skipped when the desktop has no tray |
+| `qml/Main.qml` | Frameless, transparent, always-on-top window that *is* the cat |
+| `qml/Cat.qml` | The drawing: rounded primitives plus `Shape` paths for tail, ears and mouth |
+| `qml/SettingsWindow.qml` | Coat swatches, size, pace, eye tracking, trick buttons |
+
+The cat is drawn in a fixed 100 x 90 design space and scaled by `width / 100`,
+so every size setting stays crisp. There are no image assets.
+
+## Build
+
+macOS with the Qt online installer:
+
+```bash
+~/Qt/6.11.1/macos/bin/qt-cmake -S . -B build -G Ninja -DCMAKE_MAKE_PROGRAM=$HOME/Qt/Tools/Ninja/ninja
+```
+
+Linux with distribution Qt packages:
+
+```bash
+cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
+```
+
+```bash
+cmake --build build
+```
+
+Needs Qt 6.8 or newer for `Shape.CurveRenderer`. Required modules: Core, Gui,
+Quick, QuickControls2, Widgets. Widgets is only there because `QSystemTrayIcon`
+needs it for its context menu.
+
+## Running on X11
+
+The cat is a frameless, transparent, always-on-top `Qt::Tool` window that places
+itself. Two environment variables cover the cases where a window manager
+disagrees:
+
+| Variable | Effect |
+|---|---|
+| `WORKCAT_X11_BYPASS=1` | Adds `Qt::X11BypassWindowManagerHint`, making an override-redirect window. Use when the WM refuses to keep the cat on top or shows it in the taskbar. |
+| `WORKCAT_OPAQUE=1` | Paints a solid background instead of relying on transparency. Use when no compositor runs and the cat sits in a black box. |
+| `WORKCAT_POSE=Sitting` | Freezes the cat in one mood. Handy for screenshots. Accepts any `CatController::Mood` name. |
+
+Wayland cannot let a client position its own window, so the cat would stay
+wherever the compositor puts it. The app prints a warning and suggests
+`QT_QPA_PLATFORM=xcb`.
+
+Desktops without a status-notifier host get no tray icon. The cat itself stays
+the entry point: right-click or double-click opens the settings window.
+
+## Interaction
+
+| Input | Result |
+|---|---|
+| Click | Pet the cat, it closes its eyes and purrs |
+| Drag | Pick the cat up and put it somewhere else |
+| Hover | Blush and purr wiggle |
+| Double-click or right-click | Settings window |
+| Tray menu | Tricks, nap toggle, settings, quit |