BREAKING CHANGE: permissions `users.edit` and `users.delete` have been replaced by a single `users.manage` permission; any role or code referencing the old keys must be updated
- remove `USERS_EDIT` and `USERS_DELETE` from `PERMISSIONS` and `PERMISSION_DEFINITIONS`
- add `USERS_MANAGE` permission covering create, edit and delete actions
- update `db.js` to use `users.manage` in permission checks
- update `auth/api.js` to reference the new permission key
- update `UsersPage.client.js` to check `users.manage` instead of old keys
- update `api/define.js` and all README examples to reflect the new key
- add optional `permission` field to route definitions with type validation in `define.js`
- check `hasPermission()` in router after `requireAdmin()` and return 403 if denied
- document `permission` and `skipRateLimit` optional fields in api README
- load user permissions in `AdminPage.server.js` and pass them to client via `user` prop
- use `user.permissions` in `RolesPage` and `UsersPage` to conditionally render actions
- expose permission-gated API routes in `auth/api.js`
- add `createAccountSetup`, `verifyAccountSetupToken`, `deleteAccountSetupToken` to verifications core
- add `completeAccountSetup` function to auth core for password creation on invite
- add `InvitationEmail` template for sending invite links
- add `SetupAccountPage` client page for invited users to set their password
- add `UserCreateModal` admin component to invite new users
- wire invitation action and API endpoint in auth feature
- update admin `UsersPage` to include user creation modal
- update auth and admin README docs
- add new RoleBadge shared component for consistent role display
- export RoleBadge from shared components index
- replace inline Badge usage with RoleBadge in UsersPage role column
- use RoleBadge via renderTag prop in UserEditModal role TagInput
- simplify TagInput Pill to a generic unstyled pill, removing color logic
- remove separate `/zen/api/roles` fetch and `roleColorMap` state from UsersPage
- update SQL query to include aggregated roles array per user via subquery
- replace single role badge with multi-badge display supporting overflow indicator
- add `ConfirmEmailChangePage.client.js` for email change token confirmation
- add `emailChange.js` core utility to generate and verify email change tokens
- add `EmailChangeConfirmEmail.js` and `EmailChangeNotifyEmail.js` email templates
- update `UserEditModal` to handle email changes with password verification for self-edits
- update `ProfilePage` to support email change initiation
- update `UsersPage` to pass `currentUserId` to `UserEditModal`
- add email change API endpoints in `auth/api.js` and `auth/email.js`
- register `ConfirmEmailChangePage` in `AdminPage.client.js`