resume launch execution if game is launched first

[qhy040404]

Description

Related Issue

Checklist

• The target PR branch is develop branch

[Copilot]

PR Overview

This PR introduces logic to wait for the game process to exit after launch if it's already running, helping to ensure that subsequent operations depend on the game no longer being active.

• Added an unsafe asynchronous method (WaitForGameProcessExitAsync) to spin-wait on the game process exit.
• Updated using directives to include necessary game launching handler namespaces.

Reviewed Changes

File	Description
src/Snap.Hutao/Snap.Hutao/ViewModel/Game/LaunchGameViewModel.cs	Added process exit waiting logic with an unsafe spin wait implementation

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

[Copilot]

The use of an unsafe spin-wait may block the thread indefinitely if LaunchExecutionEnsureGameNotRunningHandler.IsGameRunning remains true. Consider refactoring this logic to use an asynchronous waiting mechanism or include a timeout to avoid potential deadlocks.

Suggested change

	unsafe
	{
	SpinWaitPolyfill.SpinWhile(&LaunchExecutionEnsureGameNotRunningHandler.IsGameRunning);
	const int timeoutMilliseconds = 30000; // 30 seconds timeout
	const int delayMilliseconds = 100; // 100 milliseconds delay
	int elapsedMilliseconds = 0;
	while (LaunchExecutionEnsureGameNotRunningHandler.IsGameRunning())
	{
	if (elapsedMilliseconds >= timeoutMilliseconds)
	{
	throw new TimeoutException("Waiting for the game process to exit timed out.");
	}
	await Task.Delay(delayMilliseconds).ConfigureAwait(false);
	elapsedMilliseconds += delayMilliseconds;