feat(ops): add tenant admin user management module

Adds /admin-users CRUD on the ops backend, covering listing, plan/role/KOL
toggles, subscription expiry, status flips and password resets, with a
configurable default plan code. The ops console exposes a new top-level
"用户管理" view and reorganises the sidebar so 操作员管理 and 审计日志
move under a "系统设置" group; AccountsView is renamed accordingly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/ops-web/src/main.ts

@@ -22,6 +22,7 @@ import {
   Select,
   Space,
   Spin,
+  Switch,
   Table,
   Tag,
   Tooltip,
@@ -76,6 +77,7 @@ bindUnauthorizedHandler(() => {
   Select,
   Space,
   Spin,
+  Switch,
   Table,
   Tag,
   Tooltip,