Auto rest timer between sets

Logging a set now starts your rest automatically:

• Starts on its own. The moment you check a set complete, a countdown begins using the rest the coach prescribed (or a sensible default), so you're not juggling a separate stopwatch.
• Stays in view. The timer sticks to the bottom of the workout while you scroll.
• Your call. Tap +15s if you need more, or Skip to move on.