Typing j goes back two days instead of one #1146

Where did this happen?

Local code with an up-to-date main branch, Hosted (app.compasscalendar.com)

Expected Behavior

Given it's 5pm CST on Oct 20, 2025
When the user goes to the /day view
Then they see Monday and October 20 in the headings
And when they type the j shortcut
Then they see Sunday and October 19 in the headers

Current Behavior

Given it's 5pm CST on Oct 20, 2025
When the user goes to the /day view
Then they see Monday and October 20 in the headings
And when they type the j shortcut
Then they see Saturday and October 18 in the headers

Steps to Reproduce

1. Go to /day
2. Type j or click the back button on the day view
3. Look at headings

Possible Solution

Make sure the headings and navigation are determined based on the user's locale. However, save the data in localstorage as UTC

Context

No response