v0.8.0

* Per-day exercise mode (Workout / Mobility / Office) with "Today only" override
* 19 new built-in exercises across all three modes
* Home-screen widget with live countdown, streak, and one-tap Start
* Boot-time alarm re-registration so reminders survive reboots
* Work-start notification fires 10 min early with Start action
* Pause/resume custom break music during a break
* Share unlocked achievements as branded image cards
* Accessibility overhaul + landscape-layout fixes
