Build and verify

A change is done when four things are true:

1. ./build.sh finishes with no errors.
2. You looked at the light and dark snapshots of every page you touched.
3. The snapshots match what the user story or reference screenshot asks for.
4. The grid checks pass (layout-grid skill).

App not made from the new-mac-app template (Xcode, XcodeGen, a menu bar utility, Swift 5)? Map the commands below with existing-app.md first.

Do not report a UI change as done from the code alone. SwiftUI code that compiles can still render an empty sidebar, clipped text, or unreadable dark mode.

1. Build