Fix Swift compilation errors

[codegen-sh]

This PR fixes several Swift compilation errors:

1. Fixed DispatchQueue.main.async(execute:) syntax issues in ChatViewController.swift by replacing with the correct DispatchQueue.main.async { } syntax.

2. Fixed UITableView initialization in AIViewController.swift by adding the required frame parameter.

3. Fixed Timer initialization in PerformanceViewController.swift by replacing the incorrect for: .common parameter with the correct userInfo: nil parameter.

4. Fixed the redundant cast warning in SettingsViewController.swift by removing the unnecessary as? [UITableViewCell] cast.

5. Fixed the structure of PerformanceViewController.swift to properly define the class and its supporting types.

These changes maintain the original functionality while fixing the compilation errors.

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