Use when rendering WCA competition dates anywhere in UI (popups, cards, modal headers, day list, bin-panel). All dates must be ISO yyyy-mm-dd; cross-day ranges use compact form (2026-06-06~07) — never locale month names (May 1–3). Triggers: "比赛日期", "日期区间", "date range", "start_date end_date", "2026-06-06~07".
Installation
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Use when rendering WCA competition dates anywhere in UI (popups, cards, modal headers, day list, bin-panel). All dates must be ISO yyyy-mm-dd; cross-day ranges use compact form (2026-06-06~07) — never locale month names (May 1–3). Triggers: "比赛日期", "日期区间", "date range", "start_date end_date", "2026-06-06~07".
比赛日期格式
全项目统一 ISO yyyy-mm-dd，不按 isZh 切英文/中文月名。跨天比赛用紧凑区间（不重复年月）：
场景
格式
同天
2026-06-06
同月
2026-06-06~07
同年跨月
2026-06-28~07-02
跨年
2025-12-30~2026-01-02
工具 utils/date_range.ts
formatDateRangeIso(startISO, endISO?) → 紧凑区间字符串
toIsoDate(date) → Date → 'YYYY-MM-DD'（本地时区）
