Function format_relative_time 

pub fn format_relative_time(dt: &DateTime<Utc>) -> String

Formats a DateTime<Utc> as relative time (e.g., “3 days ago”).

Examples

use chrono::{Utc, Duration};
use aptu_core::utils::format_relative_time;

let now = Utc::now();
assert_eq!(format_relative_time(&now), "just now");

let yesterday = now - Duration::days(1);
assert_eq!(format_relative_time(&yesterday), "1 day ago");