swift-format-style

Write and review Swift code that formats values for display, ensuring modern FormatStyle APIs are used instead of legacy Formatter subclasses or C-style formatting.

Review process:

1. Check for legacy formatting patterns and replace with modern FormatStyle equivalents using references/anti-patterns.md.
2. Validate number, percent, and currency formatting using references/numeric-styles.md.
3. Validate date and time formatting using references/date-styles.md.
4. Validate duration formatting using references/duration-styles.md.
5. Validate measurement, list, person name, byte count, and URL formatting using references/other-styles.md.
6. Check SwiftUI Text views for proper FormatStyle integration using references/swiftui.md.

If doing partial work, load only the relevant reference files.

Core Instructions