Function format_duration_ms 

pub fn format_duration_ms(ms: u64) -> String

Format duration in milliseconds as human-readable string.

Examples

use chie_shared::format_duration_ms;

assert_eq!(format_duration_ms(500), "500 ms");
assert_eq!(format_duration_ms(1_000), "1.0 seconds");
assert_eq!(format_duration_ms(60_000), "1.0 minutes");
assert_eq!(format_duration_ms(3_600_000), "1.0 hours");
assert_eq!(format_duration_ms(86_400_000), "1.0 days");

// Partial units
assert_eq!(format_duration_ms(1_500), "1.5 seconds");
assert_eq!(format_duration_ms(90_000), "1.5 minutes");