save was being blocked if effects were turned off

[anselm]

Summary

🤖 Generated by Copilot at 5033f01

Fixed screenshot errors and selection loss in editor. Improved takeScreenshot.ts code with optional chaining.

References

closes #insert number here

Explanation

🤖 Generated by Copilot at 5033f01

• Prevent errors and crashes when taking a screenshot with the highlight effect disabled or the hide helpers option enabled (link, link)

🤖 Generated by Copilot at 5033f01

When taking a screenshot with code
You don't want to lose your selection mode
So HighlightEffect got some checks
With optional chaining syntax
To fix issue #113 and lighten the load

QA Steps

List any additional steps required to QA the changes of this PR, as well as any supplemental images or videos.

Checklist

• If this PR is still a WIP, convert to a draft
• When this PR is ready, mark it as "Ready for review"
• ensure all checks pass
• Changes have been manually QA'd
• Changes reviewed by at least 2 approved reviewers