Camera plank and a smarter streak

What's new

• Camera plank: the timer runs only while you hold the pose and pauses when you break it.
• Three plank modes: free (count up), a time goal, and sets with a 5-second rest.
• The plank levels you up and feeds the streak and brightness just like push-ups and squats.
• Streak brightness now reflects how hard you train and holds while the streak is alive.
• Profile: edit your name and username; your handle now shows on the home screen.