Reduce compiler warnings: replace qAsConst with std::as_const and update event localPos() to position()

Replaced deprecated qAsConst usages in built modules and updated QMouseEvent::localPos() to position() per Qt6 deprecation guidance.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tests/gtest/CMakeLists.txt

@@ -0,0 +1,20 @@
+cmake_minimum_required(VERSION 3.21)
+project(GTests LANGUAGES CXX)
+
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL https://github.com/google/googletest/archive/refs/tags/release-1.14.0.tar.gz
+)
+FetchContent_MakeAvailable(googletest)
+
+# Collect generated test sources
+file(GLOB GTEST_SRCS "${CMAKE_SOURCE_DIR}/Z/*_test.cpp")
+add_executable(gtests_all ${GTEST_SRCS})
+target_compile_features(gtests_all PRIVATE cxx_std_20)
+target_include_directories(gtests_all PRIVATE ${CMAKE_SOURCE_DIR}/../../)
+# link to gtest
+target_link_libraries(gtests_all PRIVATE GTest::gtest_main)
+
+include(GoogleTest)
+gtest_discover_tests(gtests_all)