feat(editor): persist graphics settings and shadow overrides

tests/editor/test_project_file_utils.cpp

@@ -0,0 +1,65 @@
+#include <gtest/gtest.h>
+
+#include "Utils/ProjectFileUtils.h"
+
+#include <chrono>
+#include <filesystem>
+
+namespace XCEngine::Editor::ProjectFileUtils {
+namespace {
+
+class ProjectFileUtilsTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        const auto stamp = std::chrono::steady_clock::now()
+                               .time_since_epoch()
+                               .count();
+        m_projectRoot =
+            std::filesystem::temp_directory_path() /
+            ("xc_project_file_utils_" + std::to_string(stamp));
+        std::filesystem::create_directories(m_projectRoot);
+    }
+
+    void TearDown() override {
+        std::error_code ec;
+        std::filesystem::remove_all(m_projectRoot, ec);
+    }
+
+    std::filesystem::path m_projectRoot;
+};
+
+TEST_F(ProjectFileUtilsTest, SavesAndLoadsGraphicsSettingsRoundTrip) {
+    GraphicsSettingsDescriptor savedDescriptor;
+    savedDescriptor.renderPipelineAssetAssembly = "GameScripts";
+    savedDescriptor.renderPipelineAssetNamespace = "Gameplay";
+    savedDescriptor.renderPipelineAssetClass =
+        "ManagedForwardRenderPipelineProbeAsset";
+
+    ASSERT_TRUE(SaveProjectGraphicsSettings(
+        m_projectRoot.string(),
+        savedDescriptor));
+    EXPECT_TRUE(std::filesystem::exists(
+        GetGraphicsSettingsFilePath(m_projectRoot.string())));
+
+    const auto loadedDescriptor =
+        LoadProjectGraphicsSettings(m_projectRoot.string());
+    ASSERT_TRUE(loadedDescriptor.has_value());
+    EXPECT_EQ(
+        loadedDescriptor->renderPipelineAssetAssembly,
+        savedDescriptor.renderPipelineAssetAssembly);
+    EXPECT_EQ(
+        loadedDescriptor->renderPipelineAssetNamespace,
+        savedDescriptor.renderPipelineAssetNamespace);
+    EXPECT_EQ(
+        loadedDescriptor->renderPipelineAssetClass,
+        savedDescriptor.renderPipelineAssetClass);
+    EXPECT_TRUE(loadedDescriptor->HasRenderPipelineAsset());
+}
+
+TEST_F(ProjectFileUtilsTest, MissingGraphicsSettingsFileReturnsNullopt) {
+    EXPECT_FALSE(
+        LoadProjectGraphicsSettings(m_projectRoot.string()).has_value());
+}
+
+} // namespace
+} // namespace XCEngine::Editor::ProjectFileUtils