fix(app): add utility to improve terminal focus handling parital shortcut commands

[OpeOginni]

Issue for this PR

Closes #18773

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

• It blocks terminal auto-focus for pure modifier keys: Cmd, Ctrl, Alt, Shift
• It also blocks terminal auto-focus for shortcut combos like Cmd+C or Ctrl+C

How did you verify your code works?

Tested on my local machine in the dev build.

Screenshots / recordings

Screen.Recording.2026-03-23.at.12.33.41.mov

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

If you do not follow this template your PR will be automatically rejected.

[github-actions]

Thanks for your contribution!

This PR doesn't have a linked issue. All PRs must reference an existing issue.

Please:

1. Open an issue describing the bug/feature (if one doesn't exist)
2. Add Fixes #<number> or Closes #<number> to this PR description

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