Focus Report (improve weekly comparison)

Instead of comparing weekly focus to the screen time “declared at setup”, it should either compare it to the average screen time from the previous week, or if you’ve used opal long enough, it should use your average weekly screen time to give you a better idea of how you’re progressing. I feel like the “declared” screen time is inaccurate and I’ve been using opal for a few months so it just doesn’t seem like a relevant data point any more