Fix Cardfields Popover

[buzzamus]

Summary of changes

• Corrects UIComponents minimum iOS version to 16.0 to match rest of SDK
• Fixes popover code for iOS versions 16.0-16.3 to use custom popover view. iPadOS and iOS 16.4 and above will use existing popover
• unrelated, but cleaned up the Demo view CardFields button to look better

26.2 iOS example:

iOS 16.1 example:

AI Usage

Which AI Agent Was Used?

• Copilot
• Claude
• Other (Type Name Here)

How was AI used?
Used to create custom popover view logic and explore best way to switch between 16.4+ and pre-16.4 code.

Estimated AI Code Contribution

• less than 30%
• 30 - 60%
• 60 - 100%

Checklist

• Added a changelog entry
• Tested and confirmed payment flows affected by this change are functioning as expected

Authors

List GitHub usernames for everyone who contributed to this pull request.

• @buzzamus

[github-actions]

Dependency Review

✅ No vulnerabilities found.

Scanned Files

None