Fitness Fortify

- Native SwiftUI iOS redesign - Modern dark charcoal and electric orange UI - Four-tab navigation: Workout, Timers, History, Settings - Custom workout generator with Warmup, Beatdown, and Mary sections - Editable exercise libraries with persistent changes - Random Exercise and Random Mary no-repeat queues - Large, readable timer controls and displays - 3-2-1 visual countdown with audio and haptics - 15, 30, 60, 120-second preset timers - Custom countdown and count-up stopwatch - Accurate pause, resume, reset, and stop behavior - Bundled offline timer audio using beep_start.mp3 - Workout history with sharing and confirmation dialogs - Native workout and Backblast sharing - Custom YourFullStack branding footers and app icon - Persistent local workouts, settings, and exercise data