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>

build/cmake_install.cmake

@@ -12,7 +12,7 @@ if(NOT DEFINED CMAKE_INSTALL_CONFIG_NAME)
     string(REGEX REPLACE "^[^A-Za-z0-9_]+" ""
            CMAKE_INSTALL_CONFIG_NAME "${BUILD_TYPE}")
   else()
-    set(CMAKE_INSTALL_CONFIG_NAME "Debug")
+    set(CMAKE_INSTALL_CONFIG_NAME "Release")
   endif()
   message(STATUS "Install configuration: \"${CMAKE_INSTALL_CONFIG_NAME}\"")
 endif()