chore: resolve button state download engine variant

[urmauur]

Describe Your Changes

This pull request includes several updates to the web/screens/Settings/Engines/Settings.tsx file. The changes primarily focus on improving error handling, ensuring immutability, and cleaning up the code by removing unused imports.

Error Handling and Immutability Improvements:

• Added error logging when a variant is not found during the engine installation process.
• Updated the setInstallingEngines function to clone the existing Map to ensure immutability before making modifications.

Code Cleanup:

• Removed the unused Trash2Icon import from lucide-react.
• Removed the unused uninstallEngine import from @/hooks/useEngineManagement.

Minor Adjustments:

• Added a newline for better readability in the return statement of the EngineSettings component.

Fixes Issues

• Closes #
• Closes #

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed

[github-actions]

Barecheck - Code coverage report

Total: 68.61%

Your code coverage diff: 0.00% ▴

✅ All code changes are covered

[github-actions]

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