feat(identity): 支持用户和用户组批量管理

增加原子批量启用、禁用和删除接口及管理端多选操作，目标缺失时整批回滚。\n\n拆分管理端与 API Key 权限缓存并在弹窗保存后刷新候选；补齐失效规则一键清理样式、固定右侧操作列和 OpenAPI 契约。

packages/contracts/src/index.ts

@@ -399,6 +399,20 @@ export interface GatewayUserUpsertRequest {
   status?: 'active' | 'disabled' | 'locked' | 'deleted' | string;
 }
 
+export type IdentityBatchAction = 'enable' | 'disable' | 'delete';
+
+export interface IdentityBatchRequest {
+  ids: string[];
+  action: IdentityBatchAction;
+}
+
+export interface IdentityBatchResponse {
+  action: IdentityBatchAction;
+  requestedCount: number;
+  affectedCount: number;
+  ids: string[];
+}
+
 export interface GatewayTenant {
   id: string;
   tenantKey: string;