whois-band/app/lib/utils.ts, branch master Unnamed repository; edit this file 'description' to name the repository. Separate current/former members with calculable period dates 2026-05-10T13:46:59+00:00 yyamashita yyamashita@mosquit.one 2026-05-10T13:46:59+00:00 ec2417fc3e7029cb6fa84aa184daac2768ddad85 - Add MemberGroup/BandGroup types and groupBandMembers/groupArtistMembers helpers - Calculate membership duration in months from YYYY-MM since/until values - Band view splits members into 在籍中 / 元メンバー sections with duration label - Artist view splits bands into 在籍中 / 元在籍 sections with duration label - Change since/until inputs to type="month" for structured data entry Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> 
- Add MemberGroup/BandGroup types and groupBandMembers/groupArtistMembers helpers
- Calculate membership duration in months from YYYY-MM since/until values
- Band view splits members into 在籍中 / 元メンバー sections with duration label
- Artist view splits bands into 在籍中 / 元在籍 sections with duration label
- Change since/until inputs to type="month" for structured data entry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>