Function get_shift_info 

pub fn get_shift_info(
    date: NaiveDate,
    config: &ShiftCycleConfig,
    team_phase_offset: u32,
) -> ShiftInfo

Get full shift info (date, day of cycle, cycle index, shift type) in one call.

Returns ShiftInfo which includes everything you typically need:

use shift_algorithm::cycle::default_config;
use shift_algorithm::get_shift_info;
use chrono::NaiveDate;

let config = default_config();
let today = NaiveDate::from_ymd_opt(2026, 5, 22).unwrap();
let info = get_shift_info(today, &config, 0);

println!("{} · 第 {}/{} 天",
    info.shift_type.full_label(),
    info.day_of_cycle,
    config.cycle_length,
);

assert_eq!(info.date, today);
assert!(info.day_of_cycle >= 1);
assert!(info.day_of_cycle <= 42);
assert_eq!(info.cycle_index + 1, info.day_of_cycle);