fix: use the user's system locale for date formatting

[samhoooo]

fix issue #26

Instead of hardcoding Norwegian locale, use the user's system locale for date formatting

[pattang56892]

Hi there, this is done.
All you have to do is:

go to the file: "Sidebar.vue"; and
Ensure you change "no" to "en-US" as shown below, and it will convert the locale from Norwegian to English.
{{ chat.createdAt.toLocaleDateString('en-US', { day: '2-digit', month: 'short', weekday: 'long', hour: '2-digit', minute: '2-digit', second: '2-digit', }) }}