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)

tests/gtest/README.md

@@ -0,0 +1,11 @@
+Generated GoogleTest stubs for Z/src.
+
+Usage:
+  python3 tests/gtest/generate_gtests.py    # generate test sources and CMakeLists
+  cmake -S . -B build
+  cmake --build build -- -j5
+  ctest --test-dir build -j5
+
+Notes:
+- Tests are lightweight smoke stubs that compile and assert true. Replace with meaningful assertions per-function.
+- Uses FetchContent to download GoogleTest at configure time.

tests/gtest/generate_gtests.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+"""
+Generate a single GoogleTest binary from lightweight per-source test stubs.
+Run from repo root: python3 tests/gtest/generate_gtests.py
+"""
+import os
+from pathlib import Path
+ROOT = Path(__file__).resolve().parents[2]
+SRC_DIR = ROOT / 'Z' / 'src'
+OUT_DIR = ROOT / 'tests' / 'gtest' / 'Z'
+OUT_DIR.mkdir(parents=True, exist_ok=True)
+
+TEMPLATE = '''#include <gtest/gtest.h>\n{includes}\n\nTEST({test_suite}, smoke) {{\n    // TODO: replace with meaningful unit tests for {rel_cpp}\n    ASSERT_TRUE(true);\n}}\n'''
+
+sources = []
+for cpp in sorted(SRC_DIR.rglob('*.cpp')):
+    rel = cpp.relative_to(SRC_DIR)
+    name = str(rel).replace(os.sep, '__')
+    out_cpp = OUT_DIR / (name + '_test.cpp')
+    # try to include corresponding header if exists
+    header = cpp.with_suffix('.h')
+    includes = ''
+    if header.exists():
+        includes = f'#include "{header.relative_to(ROOT)}"'
+    else:
+        includes = '// no corresponding header to include'
+    content = TEMPLATE.format(includes=includes, test_suite=name.replace('.', '_'), rel_cpp=str(rel))
+    out_cpp.write_text(content)
+    sources.append(str(Path('tests/gtest/Z') / (name + '_test.cpp')))
+
+# Write CMakeLists for gtests
+cmake = ROOT / 'tests' / 'gtest' / 'CMakeLists.txt'
+cmake.write_text('''
+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)
+''')
+
+print(f"Wrote {len(sources)} test stubs to {OUT_DIR}")
+print("Run: cmake -S . -B build && cmake --build build -- -j5 && ctest --test-dir build -j5")