fix(admin): remove manual reasons and repair code creation

frontend/src/components/admin/administrators-resource.tsx

@@ -7,7 +7,7 @@ import { App, Button, Card, Form, Input, Modal, Select, Space, Table, Tag, Typog
 import { useState } from "react";
 
 import { adminRequestJson, type AdminIdentity } from "@/lib/admin/providers";
-import { ReasonActionModal } from "./reason-action-modal";
+import { ConfirmActionModal } from "./confirm-action-modal";
 import { formatAdminDate } from "./resource-table";
 
 const roleOptions = [
@@ -70,7 +70,7 @@ export default function AdministratorsResource() {
     });
   }
 
-  async function submitRoleAction(reason: string) {
+  async function submitRoleAction() {
     if (!pendingAction) return;
     setSaving(true);
     try {
@@ -80,7 +80,6 @@ export default function AdministratorsResource() {
           userId: pendingAction.userId,
           email: pendingAction.email,
           roleCode: pendingAction.roleCode,
-          reason,
         }),
       });
       message.success(pendingAction.action === "assign" ? "管理员角色已分配" : "管理员角色已撤销");
@@ -100,7 +99,7 @@ export default function AdministratorsResource() {
       extra={canManage ? <Button type="primary" icon={<PlusOutlined />} onClick={() => openAssignment()}>按邮箱分配角色</Button> : <Typography.Text type="secondary">只读权限</Typography.Text>}
     >
       <Typography.Paragraph type="secondary">
-        六类系统角色可在此分配和撤销。每次变更都需要填写操作原因并写入审计日志；最后一位 Owner 受服务端保护，不能被撤销。
+        六类系统角色可在此分配和撤销。系统会自动记录管理员、动作和请求 ID；最后一位 Owner 受服务端保护，不能被撤销。
       </Typography.Paragraph>
       <Form {...searchFormProps} layout="inline" style={{ marginBottom: 16 }}>
         <Form.Item name="q" label="搜索">
@@ -133,7 +132,7 @@ export default function AdministratorsResource() {
       <Modal
         title={assignmentUser ? `为 ${assignmentUser.email} 分配角色` : "按邮箱分配管理员角色"}
         open={assignmentOpen}
-        okText="继续验证"
+        okText="继续"
         cancelText="取消"
         onOk={() => assignmentForm.submit()}
         onCancel={() => setAssignmentOpen(false)}
@@ -151,14 +150,14 @@ export default function AdministratorsResource() {
           </Form.Item>
         </Form>
       </Modal>
-      <ReasonActionModal
+      <ConfirmActionModal
         open={Boolean(pendingAction)}
         title={pendingAction?.action === "revoke" ? `撤销角色：${pendingAction.label}` : `分配角色：${pendingAction?.label ?? ""}`}
         okText={pendingAction?.action === "revoke" ? "确认撤销" : "确认分配"}
         danger={pendingAction?.action === "revoke"}
         confirmLoading={saving}
         onCancel={() => setPendingAction(null)}
-        onSubmit={submitRoleAction}
+        onConfirm={submitRoleAction}
       />
     </Card>
   );