3f7150cb5c
Wire the human-facing surface for the tenant-RBAC system that PR 1 introduced and PR 2 enforced: REST endpoints + UI for managing tenant members, plus the long-pending invite_only registration gate. Backend - internal/handler/auth.go: Register now rejects with 403 when auth.registration_mode=invite_only. PR 1 already exposes the mode via /auth/config so the frontend hides the sign-up link; this is the server-side enforcement for direct API calls. - internal/handler/tenant_member.go: new TenantMemberHandler with ListMembers / AddMember / UpdateMemberRole / RemoveMember. Maps service-layer sentinels onto HTTP semantics (ErrLastOwner -> 409, ErrMembershipAlreadyExists -> 409, ErrUserNotFound on AddMember -> 404, ErrInvalidTenantRole -> 400). AddMember requires the invitee to already have an account; SMTP-driven email invites are deferred. - internal/types/tenant_member.go: new TenantMemberResponse projection carrying the fields the management UI renders (email, username, avatar, role, joined_at). - internal/router/router.go: four routes under /tenants/:id/members gated per the matrix (Viewer+ for list, Owner+ for every mutation). - internal/container/container.go: dig provider for the new handler. Tests - handler/tenant_member_test.go: 12 table-driven cases covering happy path, dangling-user tolerance, ErrLastOwner -> 409, ErrMembershipNotFound -> 404, ErrMembershipAlreadyExists -> 409, unknown email -> 404, invalid role rejected before user lookup, bad tenant id -> 400. - handler/auth_register_invite_only_test.go: invite_only -> 403, self_serve -> 201, nil Auth config falls through. Frontend - src/api/tenant/members.ts: typed client (TenantRole/TenantMember/...) for the four endpoints. - src/views/settings/TenantMembers.vue: members table with add dialog, inline role select, confirm-remove modal. All mutation widgets gated behind currentTenantRole === 'owner'; server still enforces. - src/views/settings/Settings.vue: register the Members tab; show only when currentTenantRole is loaded (avoids tab flash on cold nav). - i18n in en-US/zh-CN/ko-KR/ru-RU: new tenantMember namespace covering all UI strings and structured error messages (lastOwner / userNotFound / alreadyMember / invalidRole etc). This completes the #1303 RBAC rollout. With cfg.Tenant.EnableRBAC=true operators now have a full management surface; with EnableRBAC=false the routes still exist but mutations log-and-pass per PR 2 contract.