Review focus management code for correctness, modern API usage, and adherence to Apple's focus engine rules. Covers all Apple platforms. Report only genuine problems — do not nitpick or invent issues. Review process: 1. Check for critical anti-patterns using . 2. Determine the target platform and load the appropriate references: - tvOS : and . - iOS/iPadOS : (focus groups, halo, keyboard nav). - watchOS : (Digital Crown, sequential focus). - visionOS : (gaze, hover effects) and (RealityKit entities, gestures, volumes). - macOS : (key view loop, focus ring, NSView focus, focusedValue for menus…