Expose project folder as PROJECT_DIR Lua global instead of changing CWD

Agent-Logs-Url: https://github.com/Overload-Technologies/Overload/sessions/6068997a-0821-4ca8-a5a7-24a16f8a021d

Co-authored-by: adriengivry <33324216+adriengivry@users.noreply.github.com>

Author: Copilot

Sources/OvCore/include/OvCore/Scripting/Lua/LuaScriptEngine.h

@@ -32,7 +32,6 @@ namespace OvCore::Scripting
 		std::unique_ptr<sol::state> luaState;
 		std::filesystem::path projectAssetsPath;
 		std::filesystem::path engineAssetsPath;
-		std::filesystem::path previousWorkingDirectory;
 		std::vector<std::reference_wrapper<OvCore::ECS::Components::Behaviour>> behaviours;
 		uint32_t errorCount;
 	};

Sources/OvCore/src/OvCore/Scripting/Lua/LuaScriptEngine.cpp

@@ -342,16 +342,6 @@ void OvCore::Scripting::LuaScriptEngine::CreateContext()
 {
 	OVASSERT(m_context.luaState == nullptr, "A Lua context already exists!");
 
-	m_context.previousWorkingDirectory = std::filesystem::current_path();
-
-	std::error_code ec;
-	std::filesystem::current_path(m_context.projectAssetsPath.parent_path(), ec);
-	if (ec)
-	{
-		OVLOG_WARNING("Failed to set working directory to project folder: " + ec.message());
-		m_context.previousWorkingDirectory.clear();
-	}
-
 	m_context.luaState = std::make_unique<sol::state>();
 	m_context.luaState->open_libraries(
 		sol::lib::base,
@@ -370,6 +360,10 @@ void OvCore::Scripting::LuaScriptEngine::CreateContext()
 		callback(*m_context.luaState);
 	}
 
+	// Expose the project folder as a global so Lua scripts can construct absolute paths
+	// (e.g. io.open(PROJECT_DIR .. "/save.dat", "w")) without relying on the process CWD.
+	m_context.luaState->set("PROJECT_DIR", m_context.projectAssetsPath.parent_path().string());
+
 	m_context.errorCount = 0;
 
 	std::for_each(m_context.behaviours.begin(), m_context.behaviours.end(),
@@ -401,15 +395,4 @@ void OvCore::Scripting::LuaScriptEngine::DestroyContext()
 	);
 
 	m_context.luaState.reset();
-
-	if (!m_context.previousWorkingDirectory.empty())
-	{
-		std::error_code ec;
-		std::filesystem::current_path(m_context.previousWorkingDirectory, ec);
-		if (ec)
-		{
-			OVLOG_WARNING("Failed to restore working directory: " + ec.message());
-		}
-		m_context.previousWorkingDirectory.clear();
-	}
 }