fix(desktop): update zen mode shortcut key notation

[kovsu]

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Suggested PR Title:

fix: standardize zenMode shortcut key abbreviation

Change Summary:
Updated the keyboard shortcut for zenMode to use 'Ctrl' instead of 'Control'. This change improves consistency with other shortcut formats and enhances user familiarity.

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Thank you @kovsu for your contribution! 🎉

Your pull request has been merged and we really appreciate your help in making this project better. We hope to see more contributions from you in the future! 💪