Fix Swift compilation errors in iOS AI Assistant views

[codegen-sh]

This PR fixes several Swift compilation errors in the iOS AI Assistant views:

1. Fixed missing frame parameter in UITableView initialization in AIViewController
2. Fixed UIColor and UITableViewCell.SeparatorStyle references that were missing explicit types
3. Removed unnecessary 'try' keyword from a non-throwing function call
4. Fixed redundant conformance to ViewControllerRefreshable protocol and added 'override' keyword
5. Fixed missing parentheses in DispatchQueue.main.async closures

These changes resolve all the compilation errors reported in the build logs.

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