[Web] Calendar alert when fitness is building faster than yesterday

What’s new

If you use Tempo on the web, your training calendar can now show a small heads-up card on days when your fitness is rising noticeably faster than the day before. Color and icon reflect how strong that jump is, from a moderate pick-up to a rare spike.

Why it helps

Big day-to-day jumps in training load are easy to miss until you feel wiped out. The card puts that on the calendar in plain language; tap it to open a short explainer with practical reminders — sleep, fuel, spacing hard days, easing the week if needed.