Wrong week shown at end of year

[kusalananda]

Describe the bug

During the last few days of 2024, the 30th and 31st of December, it was week 1. Urdr, therefore, showed week 1 of 2024, i.e., the week starting on the 1st of January 2024, rather than the correct week starting on the 30th of December 2024. This could potentially cause invalid user input or removal of data.

Steps to reproduce

Visit the Urdr web application on the 30th or 31st of December 2024.

Screenshots

Wrong week shown by default:

Correct week is accessible by typing in the correct URL manually, or by using the date-picker:

Probable Cause

It might be that the redirect to the week view is where the math goes wrong.