🐛(frontend) fix doc timestamp display

[buildwithricky]

Purpose

Implemented the logic to show 'Just now' instead of '0 seconds ago' when the difference is under one second. Users can now see 'just now' when an edit happens.

Proposal

• [x] Fixed the '0 seconds ago issue' to show 'Just Now' when edits happen.

External contributions

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[buildwithricky]

@rvveber

[buildwithricky]

@rvveber where you able to review this yet the workflow hasn't started