feat(table): 表格排序与搜索改为后端处理

frontend/src/api/admin/usage.ts

@@ -81,6 +81,8 @@ export interface AdminUsageQueryParams extends UsageQueryParams {
   user_id?: number
   exact_total?: boolean
   billing_mode?: string
+  sort_by?: string
+  sort_order?: 'asc' | 'desc'
 }
 
 // ==================== API Functions ====================