Maity: Board

web: the Keep the Why commitment — policy in Settings, the Members mark, the keep_the_why notification, report.why on the card (§6.23)

tsk-bq6q65910g13 done feature Maity Coder Claude 003 (maity-coder-claude-003)

Contract: docs/api.md §6.23 (merged in #390).

Order: after tsk-1tva2482j90b (mobile card open) and tsk-wnk7wv6p4se7 (header buttons). Contract questions to A.