Fix inconsistent border radius across application (#555) and (#552)

[prince-0408]

• Standardized border radius for cards and UI elements
• Updated liquid-glass tab bar styling to match modern iOS design
• Applied consistent corner radius across InformationScreenVC, SettingsViewController, TipCardView, and table view cells
• Ensures uniform appearance across iOS 26 Simulator

Fixes #552

Contributor checklist

• This pull request is on a separate branch and not the main branch
• I have tested my code with the xcodebuild and swiftlint --strict commands as directed in the testing section of the contributing guide

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Description

This PR fixes inconsistent border radius styling and improves the liquid-glass tab bar design, addressing issues #555 and #552.

Changes made:

• Standardized border radius values for all card components and UI elements
• Updated the liquid-glass tab bar styling with modern glassmorphism effect
• Applied consistent corner radius across:
  • InformationScreenVC.swift (About screen)
  • SettingsViewController.swift (Settings screen)
  • TipCardView.swift
  • InfoChildTableViewCell.swift
  • RadioTableViewCell.swift

Visual improvements:

• All cards now have uniform rounded corners
• Tab bar has a polished glass effect matching iOS design standards
• Consistent modern appearance throughout the application

Testing:
Tested on iOS Simulator and verified:

• Consistent border radius across all screens (About, Settings)
• Smooth tab bar styling with liquid-glass effect
• Proper rendering across different screens

Screenshots:
Before and after comparisons showing the improved border radius consistency and tab bar styling.

Related issue

Closes #552

[github-actions]

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[github-actions]

Maintainer Checklist

The following is a checklist for maintainers to make sure this process goes as well as possible. Feel free to address the points below yourself in further commits if you realize that actions are needed :)

• Tests for changes have been written and the CI unit test, linting and formatting workflows within the PR checks do not indicate new errors in the files changed

• The CHANGELOG has been updated with a description of the changes for the upcoming release and the corresponding issue (if necessary)

[github-actions]

First PR Commit Check

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[andrewtavis]

note: @prince-0408, I think it's best if we go with @catreedle's fix for the border radius in #558, but we can bring in the liquid glass changes from this PR :)

praise: Thanks so much for your work here and your patience! Great to have you in the community, and we hope we can continue to work with you! Please let us know if there are issues you'd be interested in working on, and if there are, then you can write in the issue and ask to be assigned 😊