Rename to TNCat, add chip chase, G-codes and a Wayland layout

The project is now TNCat, after HEIDENHAIN's TNC controls. Binary, QML module
URI, settings path, bundle id and .desktop entry follow; the environment
switches are TNCAT_*.

Entertainment: a curled steel chip skitters in every minute or two, the cat
runs it down and bats it away a few times before sitting back looking pleased.
Mood changes flash the matching machine code above its head, G00 for a sprint,
G01 for a stroll, M08 while it washes, G28 for a stretch, M30 for a nap.

Window handling was split into two layouts. X11 and macOS keep one small window
per object, positioned by the app. Wayland gets a screen-filling overlay whose
input region is masked down to the cat, since a Wayland client cannot place its
own window. Overlay mode is automatic there and available elsewhere via
TNCAT_OVERLAY=1.

Also adds a ground-line setting so the cat can walk above a softkey row.

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

CMakeLists.txt

@@ -1,17 +1,17 @@
 cmake_minimum_required(VERSION 3.21)
 
-project(Workcat
-    VERSION 0.2.0
+project(TNCat
+    VERSION 0.3.0
     DESCRIPTION "A cute desktop cat that wanders along the bottom of your screen"
     LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-find_package(Qt6 6.8 REQUIRED COMPONENTS Core Gui Quick QuickControls2 Widgets)
-qt_standard_project_setup(REQUIRES 6.8)
+find_package(Qt6 6.5 REQUIRED COMPONENTS Core Gui Quick QuickControls2 Widgets)
+qt_standard_project_setup(REQUIRES 6.5)
 
-qt_add_executable(workcat
+qt_add_executable(tncat
     src/main.cpp
     src/catcontroller.h src/catcontroller.cpp
     src/traycontroller.h src/traycontroller.cpp
@@ -19,44 +19,46 @@ qt_add_executable(workcat
     src/platforminfo.h src/platforminfo.cpp
 )
 
-target_include_directories(workcat PRIVATE src)
+target_include_directories(tncat PRIVATE src)
 
-# QML files live in qml/ but register at the module root (Workcat.Main etc.)
-set(WORKCAT_QML Main Cat SettingsWindow)
-foreach(qmlfile IN LISTS WORKCAT_QML)
+# QML files live in qml/ but register at the module root (TNCat.Main etc.)
+set(TNCAT_QML Main Cat Chip CatWindow ChipWindow OverlayWindow SettingsWindow CatMoods)
+foreach(qmlfile IN LISTS TNCAT_QML)
     set_source_files_properties(qml/${qmlfile}.qml PROPERTIES QT_RESOURCE_ALIAS ${qmlfile}.qml)
-    list(APPEND WORKCAT_QML_FILES qml/${qmlfile}.qml)
+    list(APPEND TNCAT_QML_FILES qml/${qmlfile}.qml)
 endforeach()
 
-qt_add_qml_module(workcat
-    URI Workcat
+set_source_files_properties(qml/CatMoods.qml PROPERTIES QT_QML_SINGLETON_TYPE TRUE)
+
+qt_add_qml_module(tncat
+    URI TNCat
     VERSION 1.0
-    QML_FILES ${WORKCAT_QML_FILES}
+    QML_FILES ${TNCAT_QML_FILES}
 )
 
-target_link_libraries(workcat PRIVATE
+target_link_libraries(tncat PRIVATE
     Qt6::Core Qt6::Gui Qt6::Quick Qt6::QuickControls2 Qt6::Widgets)
 
-set_target_properties(workcat PROPERTIES
+set_target_properties(tncat PROPERTIES
     MACOSX_BUNDLE TRUE
     MACOSX_BUNDLE_INFO_PLIST ${CMAKE_SOURCE_DIR}/Info.plist.in
-    MACOSX_BUNDLE_GUI_IDENTIFIER app.workcat.example
-    MACOSX_BUNDLE_BUNDLE_NAME Workcat
+    MACOSX_BUNDLE_GUI_IDENTIFIER app.tncat.example
+    MACOSX_BUNDLE_BUNDLE_NAME TNCat
     MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
     MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
     WIN32_EXECUTABLE TRUE)
 
 include(GNUInstallDirs)
-install(TARGETS workcat
+install(TARGETS tncat
     BUNDLE DESTINATION .
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 if(UNIX AND NOT APPLE)
-    install(FILES linux/workcat.desktop DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
+    install(FILES linux/tncat.desktop DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
 endif()
 
 qt_generate_deploy_qml_app_script(
-    TARGET workcat
+    TARGET tncat
     OUTPUT_SCRIPT deploy_script
     MACOS_BUNDLE_POST_BUILD
     NO_UNSUPPORTED_PLATFORM_ERROR