Route.lang is removed; Group.lang now drives the message language for
every route in the group (default en, custom via KV i18n:<lang>).
dispatch.ts loads translations per group and falls back to en for
groups without a lang. Admin UI: GroupEditor gains the language field,
RouteEditor/RouteCard drop theirs; docs and config example updated.
- New MembersPanel: role switching, add/remove members, invite-link
generation with copy/revoke, pending invite list
- New Audit tab (AuditLog.vue) with group filter
- Role-aware UI: viewer hides route/group edit actions (RouteCard readonly),
owner-only controls, role badge + member count on group cards
- GroupEditor: members managed via panel, owners field super-admin only
- en/zh i18n and CSS for the new panels
Introduce a lightweight useI18n composable (zh default, auto-detect via
navigator.language, manual toggle persisted to localStorage) with full
zh/en dictionaries, and wire translation keys through the console UI.
Add a super-admin-only Groups tab to create, edit and delete groups
(name, admin ids, owner scope). Routes now require a group via a select
in the editor, group names are shown on route cards, and the new
useMe/useGroups composables back the UI.
