Layouts, iPad-style rendering, taps, shift and layers

- JSON layouts (en-US, sv-SE inheriting number/symbol layers via base)
- LayoutModel + KeyGeometry: proportional rows, nearest-key hit testing
- KeyboardSurface: multi-pointer touch/mouse routing to the controller
- KeyboardController + ShiftState: iOS shift/caps-lock, layers, globe, dismiss
- QML view with light/dark iPad palette and drag handle
- DevHooks: SLOPOSK_AUTOTYPE, SLOPOSK_SCREENSHOT for headless checks
- Unit tests for shift, loader, geometry and controller

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/CMakeLists.txt

@@ -1,6 +1,59 @@
+# --- sloposk_core: everything that runs without a compositor; also the "Sloposk" QML module.
+
+qt_add_library(sloposk_core STATIC
+    backend/TextBackend.h
+    engine/InputEngine.h
+    engine/DirectEngine.h engine/DirectEngine.cpp
+    input/ShiftState.h input/ShiftState.cpp
+    input/KeyboardController.h input/KeyboardController.cpp
+    input/KeyboardSurface.h input/KeyboardSurface.cpp
+    layout/Layout.h
+    layout/LayoutLoader.h layout/LayoutLoader.cpp
+    layout/LayoutRepository.h layout/LayoutRepository.cpp
+    layout/KeyGeometry.h layout/KeyGeometry.cpp
+    layout/LayoutModel.h layout/LayoutModel.cpp
+)
+
+# QML lives in the top-level qml/ dir; alias each file so the module sees it at its root.
+set(SLOPOSK_QML_FILES
+    Main.qml
+    Keyboard.qml
+    Key.qml
+    DragHandle.qml
+    Theme.qml
+)
+list(TRANSFORM SLOPOSK_QML_FILES PREPEND ${PROJECT_SOURCE_DIR}/qml/ OUTPUT_VARIABLE sloposk_qml_paths)
+foreach(file IN LISTS SLOPOSK_QML_FILES)
+    set_source_files_properties(${PROJECT_SOURCE_DIR}/qml/${file} PROPERTIES QT_RESOURCE_ALIAS ${file})
+endforeach()
+set_source_files_properties(${PROJECT_SOURCE_DIR}/qml/Theme.qml PROPERTIES QT_QML_SINGLETON_TYPE TRUE)
+
+qt_add_qml_module(sloposk_core
+    URI Sloposk
+    OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/qml/Sloposk
+    QML_FILES ${sloposk_qml_paths}
+)
+
+file(GLOB layout_files CONFIGURE_DEPENDS ${PROJECT_SOURCE_DIR}/layouts/*.json)
+qt_add_resources(sloposk_core "layouts"
+    PREFIX /layouts
+    BASE ${PROJECT_SOURCE_DIR}/layouts
+    FILES ${layout_files}
+)
+
+target_include_directories(sloposk_core PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+# The generated QML type registration includes QML_ELEMENT headers by bare name.
+target_include_directories(sloposk_core PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/input
+    ${CMAKE_CURRENT_SOURCE_DIR}/layout
+)
+target_link_libraries(sloposk_core PUBLIC Qt6::Quick PkgConfig::XKB)
+
+# --- sloposk: the app, with the compositor-specific parts.
+
 qt_add_executable(sloposk
     main.cpp
-    backend/TextBackend.h
+    DevHooks.h DevHooks.cpp
     backend/InputMethodProtocol.h
     backend/KWinInputMethod.h backend/KWinInputMethod.cpp
     backend/KWinInputContext.h backend/KWinInputContext.cpp
@@ -14,28 +67,11 @@ qt6_generate_wayland_protocol_client_sources(sloposk PRIVATE_CODE FILES
 set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/qwayland-input-method-unstable-v1.cpp
     PROPERTIES COMPILE_OPTIONS "-include;wayland-client-protocol.h")
 
-# QML lives in the top-level qml/ dir; alias each file so the module sees it at its root.
-set(SLOPOSK_QML_FILES
-    Main.qml
-)
-list(TRANSFORM SLOPOSK_QML_FILES PREPEND ${PROJECT_SOURCE_DIR}/qml/ OUTPUT_VARIABLE sloposk_qml_paths)
-foreach(file IN LISTS SLOPOSK_QML_FILES)
-    set_source_files_properties(${PROJECT_SOURCE_DIR}/qml/${file} PROPERTIES QT_RESOURCE_ALIAS ${file})
-endforeach()
-
-qt_add_qml_module(sloposk
-    URI Sloposk
-    QML_FILES ${sloposk_qml_paths}
-)
-
-target_include_directories(sloposk PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
-
 target_link_libraries(sloposk PRIVATE
-    Qt6::Gui
-    Qt6::Quick
+    sloposk_core
+    sloposk_coreplugin
     Qt6::WaylandClient
     LayerShellQt::Interface
-    PkgConfig::XKB
     PkgConfig::WAYLAND
 )