7be0de0614
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>