Pressing back when on week 1 will cause the app to crash

[Square-face]

Describe the bug
When selecting week in the schedule view. If the currently selected week is one. Going one week backwards (i.e back to 52) will cause the app to crash

To Reproduce
Steps to reproduce the behavior:

1. Go to Schedule
2. Press next week until you get to week 1
3. Press previous week once
4. crash

Expected behavior
Week should roll over to 52 and nothing should happen

• Device: Samsung galaxy S20+ 5G
• OS: Android13
• Version: every version with a working week selector (tested until commit #45c647bdbed0a597b49d09f444178068e7645047)

Additional context
most likley a resut of week 0 not being a thing