I want to build a browser-based prototype for a cervical rehabilitation app. The app should be functional, minimal, and text-based — no need for complex design or graphics. The purpose of the app is to guide users through structured therapeutic training programs for neck pain. The app must include the following features: Protocol selection screen The user selects one of four available programs: Acute Phase Stability Mobility Strength Program structure Each protocol lasts 12 weeks There are 4 workouts per week Each workout includes 5 exercises Exercise screen For each exercise, display: Title Description Repetitions or duration (Optional) an emoji A button to mark it as completed Progress tracking Users can track which workouts and exercises have been completed Video support Each exercise can optionally display a Vimeo video in overlay mode, triggered by a "Watch" button No authentication is required for now — assume a single user Optional: use mock data or a simple JSON structure to simulate protocol content. The app must be easy to test and navigate. Prioritize clear structure and logic over visual design.