[ENHANCEMENT] [pixles-swift] Complete testing code

[justin13888]

Feature Description

Use various types of tests to ensure UI is robust:

• Unit and UI Testing: Automated test coverage
• Beta Testing: Distribution via TestFlight
• Performance Testing: Optimizing for speed and resource usage
• Accessibility Audits: Ensuring the app works for all users

Target Component

• pixles-api
• pixles-core-kotlin
• pixles-desktop
• pixles-docs
• pixles-media
• pixles-swift
• pixles-web
• Other: _____________________

Implementation Ideas

TODO