fix(user-profile): respect 24-hour clock setting for local time

[bartoostveen]

Description

Fixes an inconsistency where a user profile's local time did not respect the "24-Hour Time Format" setting. This was just a small annoyance I noticed, therefore there is no corresponding issue.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas Does not apply
• I have made corresponding changes to the documentation Does not apply
• My changes generate no new warnings

AI disclosure:

No artificial intelligence tools have been used while making this patch.

• Partially AI assisted (clarify which code was AI assisted and briefly explain what it does).
• Fully AI generated (explain what all the generated code does in moderate detail).